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Contents
Revision History ---------------------------------------------------------------------------------------------------------1
Copyright Information -------------------------------------------------------------------------------------------1
Disclaimer------------------------------------------------------------------------------------------------------------------------1
Introduction-----------------------------------------------------------------------------------------------------------------------2
Radio Overview-----------------------------------------------------------------------------------------------------------------3
Software Specifications------------------------------------------------------------------------------------------------------4
Circuit Description------------------------------------------------------------------------------------------------------9
CPU Pins-------------------------------------------------------------------------------------------------------16
Parts List 1---------------------------------------------------------------------------------------------------------20
Adjustment Description --------------------------------------------------------------------------------33
Troubleshooting Flow Chart--------------------------------------------------------------------------------------------43
Disassembly and Assembly-----------------------------------------------------------------------------------------------46
Exploded View------------------------------------------------------------------------------------------------------49
Parts List 2--------------------------------------------------------------------------------------------------------53
Packing Diagram--------------------------------------------------------------------------------------------------------55
PCB View-------------------------------------------------------------------------------------------------------56
Level Diagram------------------------------------------------------------------------------------------------------58
Block Diagram------------------------------------------------------------------------------------------------------59
Schematic Diagram--------------------------------------------------------------------------------------------------------60
Specifications-----------------------------------------------------------------------------------------------------------------66
TC-320 Service Manual
Revision History
Part No.
Date of
Description
Issue
8130032000000
2009.4
Initial Release
8130032000010
2010.9
Circuit Description, Schematic Diagrams, PCB View, Level
Diagram, Block Diagram, Parts List 1 & 2, and Specifications are
updated.
Copyright Information
Hytera and HYT are trademarks or registered trademarks of Hytera Communications Co., Ltd. (“Hytera”)
in PRC and/or other countries or areas. Hytera retains the ownership of its trademarks and product
names. All other trademarks and/or product names that may be used in this manual are properties of
their respective owners.
The Hytera product described in this manual may include Hytera computer programs stored in memory
or other media. Laws in PRC and/or other countries or areas protect the exclusive rights of Hytera with
respect to its computer programs. The purchase of this product shall not be deemed to grant, either
directly or by implication, any rights to the purchaser regarding Hytera computer programs. Any Hytera
computer programs may not be copied, modified, distributed, decompiled, or reverse-engineered in any
manner without the prior written consent of Hytera.
Disclaimer
Hytera endeavors to achieve the accuracy and completeness of this manual, but no warranty of
accuracy or reliability is given. All the specifications and designs are subject to change without notice
due to continuous technology development. No part of this manual may be copied, modified, translated,
or distributed in any manner without the express written permission of Hytera.
If you have any suggestions or would like to learn more details, please visit our website at:
http://www.hytera.cn.
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TC-320 Service Manual
Introduction
Manual Scope
This manual is intended for use by qualified technicians only.
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TC-320 Service Manual
Radio Overview
(1)PTT (Push-to-Talk)
Key
(5) Microphone
(9)Power Switch
(13)Accessory Jack
Cover
(17)Screw (Belt Clip)
(4)Volume Adjust
(2)SK (Side Key )
(3) Speaker
(6) Nameplate
(7) Charging Terminal
(8) Antenna
(10) Channel/Status
(11)Channel Selector
(12)Charge
Indicator
Knob
Indicator
(14)Accessory Jack
(15)Mini USB Jack
(16)Strap Hole
(18)Belt Clip
(19)Rear Cover
(20)Battery Latch
3
Keys [+]/[-]
TC-320 Service Manual
Software Specifications
Status Indications
Operations/Functions
LED Indications and Alert Tones
Power on the source radio while holding down SK,
To enter Wired Clone mode
and the LED flashes red once.
Turn on the target radio directly.
The LED glows red during cloning process.
Error occurs during cloning:
a. User Clone: Once clone begins, frequency band
and radio ID (Model ID) will be checked. The LED
Status of the source radio
Wired Clone
Mode
(After the target radio is turned
on and the cloning cable is
connected, hold down PTT of
the source radio to begin
cloning.)
glows orange for 2 seconds and then goes out to
indicate a failed check. If the check is successfully
carried out but error occurs during data cloning, the
LED will flash orange. In this situation, press any key
other than the Power Switch to turn it off.
b. Factory Clone: If error occurs during data cloning,
the LED will flash orange until you press any key
other than the Power Switch to cancel it.
Once cloning is completed, the LED will glow green.
And if the battery runs low in Clone mode, the LED
will flash red.
The LED glows green when cloning is in progress.
Status of the target radio
The green LED goes out once cloning is completed.
When the radio is turned on, an alert tone sounds and
Power On (to enter User Mode)
the LED flashes orange once.
When the radio is currently on a blank channel, it
sounds beep tones continuously.
Power Off
When the radio is turned off, the power-off alert tone
is heard.
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TC-320 Service Manual
Low Battery Alert
The LED flashes red, and a low-pitched tone sounds
every 10 seconds.
The LED glows red during transmitting.
When the TOT timer expires, the radio sounds beep
Transmitting
tones continuously.
A TOT pre-alert tone sounds before the TOT timer
expires.
Receiving
The LED glows green during receiving.
The LED flashes green once every second during the
scanning process.
Scan
Scan Start Alert (programmable by the dealer): one
beep.
Scan End Alert (programmable by the dealer): one
beep.
Writing/Reading
The LED glows red in reading data.
The LED glows green in writing data.
A low-pitched tone is heard when the radio switches
Power Adjustment
from high power to low power.
A high-pitched tone is heard when the radio switches
from low power to high power.
Monitor/VOX
The alert tone sounds once if the feature is enabled.
The alert tone sounds twice if the feature is disabled.
Description of Modes
User Mode
It is a conventional communication mode. The radio will enter this mode if you turn it on directly.
PC Programming Mode
The radio in User Mode enters PC Programming Mode through specific protocol based communication
with the programming software. In this mode, radio functions and adjustment parameters can be set
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TC-320 Service Manual
through the programming software (including User Version and Factory Version).
The operation procedures are as follows:
1) Install PC programming software and its driver dedicated for TC-320 before your initial use.
2) Connect the USB port of PC with the Mini USB jack of the radio using a programming cable.
3) Turn on the radio.
4) Launch the programming software to perform reading or writing operation.
Note:
1) When reading/writing data is in progress, red/green LED glows; when reading/writing data is
completed, red/green LED goes out.
2) During the operation, if any abnormal situation occurs or no reply is given within a period, the
reading/writing operation will fail and an error message window will pop up.
Wired Clone Mode
1. Description
Wired Clone Mode is an independent mode. To access other modes, you must restart the radio.
Wired Clone Mode covers User Clone Mode and Factory Clone Mode.
1） User Clone Mode:
Connect two radios using a clone cable. Power on the source radio while holding down SK, and it
will enter User Clone Mode after 2 seconds. The target radio can be directly turned on to enter user
mode. In this mode, data stored in EEPROM of the source radio will be cloned to EEPROM of the
target radio. The data transferred only involves channel data and common parameters, excluding
adjustment data, version and serial No. of the model.
2） Factory Clone Mode:
Connect two radios using a clone cable. Power on the source radio while holding down SK, and it
will enter User Clone Mode by default after 2 seconds. Press SK afterwards to switch to Factory
Clone Mode. The target radio can be directly turned on to enter the mode. The data transferred
covers all data in EEPROM other than serial No, with flag of manual adjustment switch included.
2. Process
Process of Wired Clone:
1) The LED flashes red once after the source radio enters Wired Clone Mode. Hold down PTT to clone
data to the target radio.
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TC-320 Service Manual
2) During communication, LED of the source radio glows red, and LED of the target radio glows green.
When communication finishes, LED of the source radio glows green and LED of the target radio goes
out, indicating that both radios are ready for another cloning operation.
3) If any abnormal situation occurs during cloning, the source radio will stop cloning and its LED will flash
orange, indicating both radios are ready for another cloning operation.
4) When the communication ends, the source radio goes back to standby status. Hold down PTT again
to begin another cloning.
Manual Adjust Mode
Hold down PTT and SK on the radio while powering it on, and the radio enters Manual Adjust Mode.
(Note: This operation is subject to the option Panel Test Mode in the programming software. When this
option is unchecked, the radio will be unable to enter the adjustment mode. It helps avoid change of
parameters and degradation of radio performance caused by user’s misoperations. )
Keep this option unchecked after values are well adjusted from factory, to avoid any unexpected change
of values. The adjustment values can be reset and changed in Factory Mode only.
Description of adjustment:
1) To enter Manual Adjust Mode
Hold down PTT and SK for 2 seconds while powering on the radio. The LED will glow orange when the
radio is in Adjust Mode. When the keys are released, the radio will enter item N of TX group (N depends
on the position where the Channel Selector knob locates).
2) To switch between TX group and RX group
This operation is done through the Channel Selector knob.
The LED glows red when adjusting items in TX group.
The LED glows green when adjusting items in RX group.
3) To switch between items of TX group/RX group
This operation is done through the Channel Selector knob.
TX group: CH1 to CH9 stand for TX Low Power, TX High Power, CDCSS Balance, CDCSS Deviation,
CTCSS Deviation (low), CTCSS Deviation (medium), CTCSS Deviation (high), TX Low Voltage
Threshold and Max. Deviation of TX Audio respectively.
The LED solidly glows red when adjusting items CH1 to CH9.
RX group: CH10 to CH12 stand for SQL On 5, SQL Off 5, and RX Low Voltage Threshold respectively.
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TC-320 Service Manual
The LED solidly glows green when adjusting items CH10 to CH12.
CH13 to CH16 are invalid and the LED goes out, indicating that no adjustment item is carried out.
4) To switch between wide and narrow bandwidth
In adjusting a certain item, short press SK (the LED flashes orange to indicate valid press) to switch
between wide and narrow bandwidth. After this operation, the first frequency of the current bandwidth is
the frequency for adjustment by default.
5) To switch frequency
Short press PTT (the LED flashes green to indicate valid press) to switch frequency one by one, under
certain bandwidth and adjustment item.
6) To increase/decrease adjustment value under certain bandwidth and adjustment item
Short press [+] under certain bandwidth and adjustment item, and the adjustment value will increase in
steps of 1; hold down [+], and the adjustment value will keep increasing in steps of 1. The adjustment
value will remain unchanged once it reaches the allowed maximum value.
Short press [-] under certain bandwidth and adjustment item, and the adjustment value will decrease in
steps of 1; hold down [-], and the adjustment value will keep decreasing in steps of 1. The adjustment
value will remain unchanged once it reaches the allowed minimum value.
7) Operations on special items:
TX group: CH8 is the TX Low Voltage Threshold. This adjustment item is related to AD sampling. Press
[+] or [-] after entering the above item, to activate AD sampling (including calculation) once. Rotate the
Channel Selector knob to save the current AD sampling value.
RX group: CH10 to CH12 stand for SQL On 5, SQL Off 5, and RX Low Voltage Threshold respectively.
These adjustment items are related to AD sampling. Press [+] or [-] after entering the above items, to
activate AD sampling (including calculation) once. Rotate the Channel Selector knob to save the
current AD sampling value.
8) Description of key press:
Short press: key press no longer than 1 second;
Long press: key press time longer than 1 second.
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TC-320 Service Manual
Circuit Description
1.
General Diagram
The general circuit is composed of TX section, RX section, power supply circuit, control circuit and etc.
The block diagram is shown in the figure below:
CHARG
1 VCC
AMP
1
D602
1
CHARG
R_LED
2
AF_OUT
U604
T_LED
D603
1
1
2
U301
LED
B302
J202
B201
+
-
2
1
Speaker
LED
SW606
EC0
EC1
EC2
EC3
1
2
MON
1
2
CHARG
POWER
Q403
LPF
W401
ANTENNA
QT_OUT
MOD
Q608
D612
TXD
SW603
SW PB
QT_OUT
D501
MON
QT_MOD
VR601
R632
R633
SW602
SW PB
CF501
LO
U401
APC
Q505
MOD_OUT
2
V1
SW605
SW PB
1
V2
2
SW601
SW PB
1
SWAF503
MIX
R204
C204
1
DOW
RF AMP
Q402
D401
SW604
SW PB
UP
RF AMP
Q401
TX OUT
J201
RXD
PTT
PRE AMP
APA_EN
PTT
2
MIC
+
2
1
2
D604
2
VOX
AF(DEMOD)
MIC IN
XF501
RF AMP
DATA/ STB/ CK
Q503
SWAF501
IF AMP
AT41511
U101
LD(SIG OUT)
U601
APC
RFC
21.7M
U608
Q506
VCO_IN
MC3361P
MB15E03SL
D504
CP
TX_CTL
NFIL OUT
2
1
2
1
1
SWAF502
BAT
EEPROM
POWER
SCL
SDA
SAVE
RESET
X601
BUSY(SQL)
XT101
21.25M
D502
2
1
2
D503
NFIL IN
D505
OSCIN
R515
C553
C522
CD501
SW
Q611
BUSY
SW
U603
Q604
U605
RFC
R602
R603
Q501
Q502
AF
R103
C132
Q605
QT_OUT
D616
TX_OUT
U602
SW
2
DC-DC
Q104
VCO
VT
Q406
Q102 D103
G601
BATTERY
D617
LO
Q601
1
D101
D102
VCC
SW
Q602
Q105
VCO_IN
RIPPLE FILTER
VR
LOOP FILTER
SW
CP
V_SAVE
MOD
D105
Q103
TX/RX SW
Q607
VDD
Figure 1
TX Section: The audio signal from MIC is sent to the MCU chip (U601) directly. The baseband signal
processing circuit in U601 converts the amplified audio signal to digital signal via A/D conversion, and
then converts the digital signal to modulation signal via D/A conversion after all processing procedures
such as filtering, signal compression, encryption, pre-emphasis, TX gain control and amplitude limiting
are completed. Then the modulation signal from MCU passes through the low-pass filter circuit and goes
to VCO for direct frequency modulation.
The modulated HF carrier signal passes through the buffer amplifiers (Q104 and Q406), and goes to the
amplifier (Q401) through the RF switching diode (D616). Then the amplified RF signal enters the
low-pass filter circuit through the switching diode (D401) after it is further amplified by the driver (Q402)
and final-stage power amplifier (Q403), and then it will be finally transmitted via antenna after high-order
harmonics are removed. The RX-TX switch circuit is composed of D401 and D501.
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TC-320 Service Manual
RX Section: RF signal received via the antenna is fed to the bandpass filter (composed of SAWF501
and SAWF502) to filter out unwanted out-of-band interference signal, and then amplified by LNA Q503.
The amplified signal is then fed to the bandpass filter (SAWF503) to further filter out unwanted
out-of-band interference signal. The desired RF signal is mixed with the first local oscillator signal
(output from VCO) by Q505. The newly generated signal is processed by the crystal filter (XF501) to get
the first IF signal (21.7MHz). After amplified by Q506, this IF signal enters U608 to be further mixed with
the second LO (local oscillator) signal and to generate the second IF signal (450 KHz). This second IF
signal is demodulated by U608 to output audio signal, which is sent to MCU for A/D conversion and
filtering. Afterwards, the audio signal is divided into two flows. One flow is processed by CTCSS/CDCSS
decoder; the other is restored to audio signal through filtering, de-emphasis, decoding, signal expansion
and D/A conversion. Then the restored audio signal is amplified by the audio power amplifier (U301) to
drive the speaker directly.
Power Supply Section: The 3.8V battery voltage is converted to two flows of 3.0V DC voltage by the
LDO module (U602), that is, VCC and V_SAVE. VCC powers CPU while V_SAVE controls VT and VR.
VT goes through Q604 and Q601, and outputs 3V voltage for TX circuit under the control of TX-CTRL;
VR supplies 3V voltage for RX circuit under the control of Q604 and Q602. VDD (3V) supplies the PLL
U101 and XT101.
2. Realization Methods of Basic Functional Modules
2.1 PLL Frequency Synthesizer
The PLL circuit mainly provides the local oscillator signal for RX and RF carrier signal for TX. It is
composed of VCO and PLL processor, allowing frequency tracking and channel switching under the
control of MCU signals.
1）
PLL
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TC-320 Service Manual
Figure 2
The PLL circuit generates RF carrier signal for TX and the first local oscillator signal for RX.
PLL: Step frequency of the PLL circuit is 6.25 KHz, 10.0 KHz or 12.5 KHz. In U101, the 21.25MHz
reference oscillator signal is divided into 6.25 KHz, 10.0 KHz or 12.5 KHz reference frequencies via a
fixed counter in PLL. Processed by the buffer amplifier, the signal output from the VCO (TX/RX VCO)
enters PLL. The amplified signal is further processed in PLL by the variable frequency-divider. Then the
signal is compared with the reference frequency in the phase detector (PD) of PLL. The signal from the
PD passes through a low-pass filter, and then is sent to the varactors (D101 and D102) of VCO so as to
control output frequency. Then the RF signal is processed by the buffer amplifiers (Q104 and Q406),
and controlled by D616 and D617 to only serve as RF signal or RX first local oscillator signal.
2）
VCO
VCO section is realized by the oscillator circuit of three-point capacitance. TX VCO and RX VCO share
the same oscillator circuit. In TX mode, Q103 is cut off and C130 gets invalid; in RX mode, Q103 is
turned on and C130 gets valid.
Note: If the PLL is unlocked, the LD pin of U101 outputs low level. If the microprocessor detects such
situation, TX/RX operation is prohibited, and an alarm sounds.
2.2 RF Power Amplifier Circuit (TX Section)
The block diagram of the RF power amplifier circuit is shown as below:
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TC-320 Service Manual
RF AMP
RF AMP
Q401
Q402
Q403
LPF
1
PRE AMP
TX OUT
R419
R420
R421
VT
SW
SW
V_BAT
APC
U401
Q405
W402
ANTENNA
APC
Q404
Figure 3
The modulated carrier signal from VCO is pre-amplified by Q104 and Q406, and controlled at D617 and
D616. Then it is processed by the front-stage amplifier Q401, the pre-driver amplifier Q402 and the
final-stage amplifier Q403 respectively. Afterwards, the amplified RF signal enters the low-pass filter
(LPF) circuit through diode D401, and then is transmitted via the antenna after ultroharmonics are
removed.
APC circuit is composed of Q404, Q405 and U401. U401 controls the bias voltage at the gates of Q402
and Q403, to control TX current and to further regulate power.
2.3 RX LNA and Mixer Circuit (RX Section)
The block diagram of the RX circuit is shown as below:
Figure 4
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TC-320 Service Manual
Desired and undesired RF signals received via the antenna are fed to the bandpass filter (composed of
SAWF501 and SAWF502) to filter out undesired out-of-band interference signal. Then the desired RF
signal is amplified by LNA Q503, and goes through the bandpass filter ( to filter out undesired
out-of-band interference signal. The desired RF signal is mixed with the first local oscillator signal
(output from VCO) by Q505. The newly generated signal is processed by the crystal filter (XF501) to get
the first IF signal (21.7MHz).
After amplified by Q506, this IF signal enters U608 to be further mixed with the second LO (local
oscillator) signal and to generate the second IF signal (450 KHz). Then the second IF signal is
demodulated by U608 to output audio signal, which is sent to MCU for A/D conversion and filtering.
Afterwards, the audio signal is divided into two flows. One flow is processed by CTCSS/CDCSS decoder;
the other is restored to audio signal through filtering, de-emphasis, decoding, signal expansion and D/A
conversion. Then the restored audio signal is amplified by the audio power amplifier (U301) to drive the
speaker directly.
2.4 MCU Control, Signal Processing and Audio Power Amplification
The block diagram of this section is shown as below:
SW606
EC0 EC1 EC2 EC3
D601
1
R_LED
2
T_LED
LED
2
PTT
2
LED
SP
U601
U301
Q201
Q202
X601
POWER
J201
Q605
U603
EEPROM
TX_CTL
V_BAT
SCL
SDA
BUSY(SQL)
SAVE
RESET
TXD/RXD
BAT
LD
DATA
CK
STB
DEMOD
APA EN
MIC
MOD OUT
R/T
VOX
D602
1
AF OUT
APC
QT_OUT
RFC
R602
R603
Q607
U605
RESET
Q604
U602
DC-DC
2
SW
AMP
VCC
VDD
SW
VT
G601
BATTERY
Q601
1
1
ON/OFF DOW UP MON
VR
V_SAVE
SW
Q602
Figure 5
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TC-320 Service Manual
2.4.1 MCU Control Circuit
MCU control circuit is composed of MCU, EEPROM, keys and etc. This section has the following
functions: to initialize data of the radio and save data to EEPROM; to detect battery voltage and signals
from external keys, LD and VOX, and to make response; to transmit required data to PLL based on the
channel encoding status; to switch and control RX/TX based on the input PTT signal; to switch the
squelch circuit on/off based on the input signaling decode signal and squelch level signal; to control
circuits of high/low power switch, audio power amplifier, VCO power supply, RX power supply and TX
power supply; (for programming) to communicate with PC via RXD/TXD based on the RS232 protocol,
and transmit/receive data to/from PC.
2.4.2 Signal Processing Section
a. TX Baseband Processing The audio signals input from MIC are divided into two flows. One flow
serves as the signal of VOX detection by Q508 and D612; the other enters U601, and then is converted
into digital signal by analog-to-digital conversion (ADC). Afterwards, the digital signal will go through a
series of processing including low-pass filtering, AGC, companding, high-pass filtering, encrypting and
pre-emphasizing. Finally, the signal is processed by the active low-pass filter and then sent to VCO for
modulation after it is converted by digital-to-analog conversion (DAC).
b. RX Baseband Processing
After entering U601, the DEMOD signal derived from IF demodulation is converted to digital signal via
analog-to-digital conversion (ADC), and then is sent to the digital low-pass filter. The signal is divided
into two flows. One flow is processed by CTCSS/CDCSS decoder; the other is processed by high-pass
filter, and then is subject to processing procedures such as de-emphasis, decryption, and signal
expansion, and finally is output as audio signal after digital-to-analog conversion.
2.4.3 Audio Power Amplifier
The audio signal output from U601 is amplified by the audio power amplifier (U301) to drive the speaker
directly.
2.5 Power Supply Processing
The block diagram of the power supply circuit is shown as below:
14
TX_CTL
TC-320 Service Manual
Q605
SAVE
POWER
Q607
Q604
2
U602
DC-DC
VCC
G602
BATTERY
VDD
SW
VT
1
Q601
VR
V_SAVE
SW
Q602
Figure 6
Power Supply Section: The 3.8V battery voltage is converted to two flows of 3.0V DC voltage by the
LDO module (U602), that is, VCC and V_SAVE. VCC powers CPU while V_SAVE controls VT and VR.
VT goes through Q604 and Q601, and outputs 3V voltage for TX circuit under the control of TX-CTRL;
VR supplies 3V voltage for RX circuit under the control of Q604 and Q602. VDD (3V) supplies the PLL
U101 and XT101.
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TC-320 Service Manual
CPU Pins
Pin No.
Port Name
Pin Name
I/O
Function
1
NC
/
/
/
2
NC
/
/
/
3
NC
/
/
/
4
NC
/
/
/
5
NC
/
/
/
6
TXD
TXD
O
UART TXD
7
RXD
RXD
I
UART RXD
8
P60
APA_EN
O
To control the speaker; H: unmute, L: mute
9
P61
SAVE_CTL
O
To control Power Save: it is at high level in
non-Power-Save status
10
P62
EXT MIC
I
To check MIC connection (valid at high level)
11
P63
EXT PTT
I
PTT key on the earpiece (valid at high level)
12
P64
Red LED
O
Red LED
13
P65
Green LED
O
Green LED
14
P66
Reserve
O
Reserved
15
P67
Reserve
O
Reserved
16
Vssd
GND
S
Ground power supply for digital circuit
17
Vddd
VCC (3.0V)
S
Power supply for digital circuit
18
P50/INT0
VOL+
I
Volume Adjust Key [+]
19
P51/INT1
VOL-
I
Volume Adjust Key [-]
20
P52/INT2
Reserve
O
Reserved
21
P53/INT3
/POWER
I
Power Switch
I
Programmable function key (side key) (valid at
SWITCH
22
P54/INT4
SK
low level), connected with a pull-up resistor
23
P55/INT5
PTT
I
PTT key (valid at low level), connected with a
pull-up resistor
24
P56/INT6
Reserve
O
Reserved
25
P57/INT7
Reserve
O
Reserved
26
Vdd_CLD
VCC (3.0V)
S
Power supply for digital PA
27
CLD_OUTP
AF_OUT
O
Audio output
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TC-320 Service Manual
28
VSS_CLD
GND
S
Ground power supply for digital PA
29
CLD_OUTM
Reserve
O
Reserved
30
Vdd_CLD
VCC (3.0V)
S
Power supply for digital PA
31
P77
RF_CTRL
O
To control RX frequency band; valid at high
level (high frequency band); valid at low level
(low frequency band)
32
P76/DAC1
APC
DA
To control TX power
33
P75/VREF
VCC (3.0V)
I
Input pin of reference voltage of ADC and DAC
34
P74/DAC0
QT_OUT
DA
CTCSS/CDCSS output
35
P73/AD3
VOX
AD
VOX energy detection pin
36
Vssa
GND
S
Ground power supply for analog circuit
37
Vdda
VCC (3.0V)
S
Power supply for analog circuit
38
P72/AD2
Reserve
AD
Reserved
39
P71/AD1
SQL
AD
To detect noise
40
P70/AD0
BAT_DET
AD
To detect battery strength
41
XTAL0
OSC0
/
42
XTAL1
OSC1
/
43
PLL_CAP
PLL_CAP
/
To connect the external capacitor (10nF) of PLL
44
NC
/
/
/
45
NC
/
/
/
46
NC
/
/
/
47
NC
/
/
/
48
NC
/
/
/
49
P03/COM3
Reserve
O
Reserved
50
P02/COM2
Reserve
O
Reserved
51
P01/COM1
Reserve
O
Reserved
52
P00/COM0
Reserve
O
Reserved
53
P10/SEG0
Reserve
O
Reserved
54
P11/SEG1
Reserve
O
Reserved
55
P12/SEG2
Reserve
O
Reserved
56
P13/SEG3
Reserve
O
Reserved
57
P14/SEG4
Reserve
O
Reserved
To connect 32.678KHz main crystal oscillator
17
TC-320 Service Manual
58
P15/SEG5
Reserve
O
Reserved
59
P16/SEG6
Reserve
O
Reserved
60
P17/SEG7
Reserve
O
Reserved
61
P20/SEG8
EN0
I
62
P21/SEG9
EN1
I
63
P22/SEG10
EN2
I
64
P23/SEG11
EN3
I
65
P24/SEG12
Reserve
O
Reserved
66
P25SEG13
Reserve
O
Reserved
67
P26/SEG14
Reserve
O
Reserved
68
P27/SEG15
Reserve
O
Reserved
69
P30/SEG16
Reserve
O
Reserved
70
P31/SEG17
Reserve
O
Reserved
71
NC
/
/
/
72
NC
/
/
/
73
NC
/
/
/
74
NC
/
/
/
75
NC
/
/
/
76
P32/SEG18
Reserve
O
Reserved
77
P33/SEG19
Reserve
O
Reserved
78
P34/SEG20
Reserve
O
Reserved
79
P35/SEG21
Reserve
O
Reserved
80
P36/SEG22
Reserve
O
Reserved
81
P37/SEG23
POWER
O
Power control pin
82
P40/SEG24
Reserve
O
Reserved
83
P41/SEG25
SCL
O
EEPROM CLOCK, connected with a pull-up
To detect input from the encoder switch
resistor
84
P42/SEG26
SDA
O
EEPROM DATA, connected with a pull-up
resistor
85
P43/SEG27
LD
I
To detect PLL circuit unlock (H: lock; L: unlock),
connected with a pull-up resistor
86
P44/SEG28
DATA
O
PLL DATA
87
P45/SEG29
CK
O
PLL CLOCK
18
TC-320 Service Manual
88
P46/SEG30
STB
O
PLL ENABLE
89
Vssd
GND
S
Ground power supply for digital circuit
90
Vddd
VCC (3.0V)
S
Power supply for digital circuit
91
SW_P0
R/T
O
To control RX/TX, H: RX; L: TX (switch to VCO)
92
SW_P1
TX_CTRL
O
To control power supply for TX (transmit at high
level)
93
RESET
RESET
I
Reset input
94
Vssa
GND
S
Ground power supply for analog circuit
95
Vdda
VCC (3.0V)
S
Power supply for analog circuit
96
BG_REF
O
Reference voltage output pin
97
MIC_IN
MIC_IN
I
Microphone input pin
98
DEMODE
DEMODE
I
Baseband signal (audio and CTCSS/CDCSS)
input pin
99
MODOUT
MODOUT
O
Baseband signal (audio and CTCSS/CDCSS)
output pin
100
NC
/
/
/
Requirement: As the port of Reserved is set to O, its configuration should be Output and Open.
19
TC-320 Service Manual
Parts List 1
No.
Part No.
Description
Qty. Ref No. Print No. Remark
1
3001050000000 Chip resistor 0Ω J 1/16W (RoHS)
1
L510
B2H
2
3001050000000 Chip resistor 0Ω J 1/16W (RoHS)
1
R223
T3G
3
3001050000000 Chip resistor 0Ω J 1/16W (RoHS)
1
R518
B3H
4
3001050000000 Chip resistor 0Ω J 1/16W (RoHS)
1
R527
B2H
5
3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R101
B4H
6
3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R108
B4G
7
3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R119
B3F
8
3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R311
T3A
9
3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R429
B2F
10 3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R516
B3I
11 3001051000020 Chip resistor 10Ω F 1/16W (RoHS)
1
R530
B2G
12 3001051010040 Chip resistor 100Ω F 1/16W (RoHS)
1
R604
T2E
13 3001051010040 Chip resistor 100Ω F 1/16W (RoHS)
1
R614
T4E
14 3001051010040 Chip resistor 100Ω F 1/16W (RoHS)
1
R621
T4E
15 3001051010040 Chip resistor 100Ω F 1/16W (RoHS)
1
R623
T4E
16 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R104
B4F
17 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R109
B4E
18 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R207
T2G
19 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R214
T3D
20 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R309
T4D
21 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R613
T2G
22 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R637
T5F
23 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R640
T4E
U1
24 3001055610000 Chip resistor 560Ω J 1/16W(RoHS)
1
R640
T4E
U2
25 3001051020000 Chip resistor 1KΩ F 1/16W (RoHS)
1
R645
T5D
26 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R107
B4E
27 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R116
B3E
28 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R219
T2D
29 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R301
T3A
30 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R409
T2B
31 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R413
B2F
32 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R428
T2B
33 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R113
B3E
34 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R120
B3F
35 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R213
T3D
36 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R424
T3B
37 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R427
T2A
38 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R433
B2G
39 3001051040000 Chip resistor 100KΩ F 1/16W (RoHS)
1
R504
T3H
40 3001051050000 Chip resistor 1MΩ F 1/16W (RoHS)
1
R218
T2D
41 3001051050000 Chip resistor 1MΩ F 1/16W (RoHS)
1
R405
T2B
42 3001051230000 Chip resistor 12KΩ J 1/16W (RoHS)
1
R224
T3G
20
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
43 3001051230000 Chip resistor 12KΩ J 1/16W (RoHS)
1
R528
B2G
44 3001051530000 Chip resistor 15KΩ J 1/16W (RoHS)
1
R406
T2A
45 3001051530000 Chip resistor 15KΩ J 1/16W (RoHS)
1
R607
T3G
46 3001051540000 Chip resistor 150KΩ F 1/16W (RoHS)
1
R422
T3A
47 3001051540000 Chip resistor 150KΩ F 1/16W (RoHS)
1
R423
T3B
48 3001051540000 Chip resistor 150KΩ F 1/16W (RoHS)
1
R425
T3B
49 3001051540000 Chip resistor 150KΩ F 1/16W (RoHS)
1
R426
T3A
50 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R110
B4E
51 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R202
T2D
52 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R216
T3D
53 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R507
B3H
54 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R508
T3H
55 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R615
T3H
56 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R641
T5D
U1
57 3001052020020 Chip resistor 2KΩ F 1/16W (RoHS)
1
R641
T5D
U2
58 3001052230010 Chip resistor 22KΩ J 1/16W (RoHS)
1
R103
B4G
U1
59 3001051530000 Chip resistor 15KΩ J 1/16W (RoHS)
1
R103
B4G
U2
60 3001052230010 Chip resistor 22KΩ J 1/16W (RoHS)
1
R215
T3D
61 3001052240010 Chip resistor 220KΩ F 1/16W (RoHS)
1
R602
T2E
62 3001052240010 Chip resistor 220KΩ F 1/16W (RoHS)
1
R603
T2E
63 3001052710010 Chip resistor 270Ω J 1/16W (RoHS)
1
R115
B3E
64 3001052710010 Chip resistor 270Ω J 1/16W (RoHS)
1
R505
B2I
65 3001052710010 Chip resistor 270Ω J 1/16W (RoHS)
1
R506
B3H
66 3001052730010 Chip resistor 27KΩ F 1/16W (RoHS)
1
R121
T4F
67 3001052730010 Chip resistor 27KΩ F 1/16W (RoHS)
1
R408
T2A
68 3001053310010 Chip resistor 330Ω J 1/16W (RoHS)
1
R404
B2E
69 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R203
T4E
70 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R204
T4E
71 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R401
B2F
72 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R402
B2E
73 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R534
B4H
U1
74 3001055620000 Chip resistor 5.6KΩ J 1/16W (RoHS)
1
R534
B4H
U2
75 3001053320000 Chip resistor 3.3KΩ J 1/16W (RoHS)
1
R536
B4H
U1
76 3001055620000 Chip resistor 5.6KΩ J 1/16W (RoHS)
1
R536
B4H
U2
77 3001053920010 Chip resistor 3.9KΩ J 1/16W (RoHS)
1
R431
B3F
78 3001058220000 Chip resistor 8.2KΩ J 1/16W (RoHS)
1
R606
T4C
79 3001053920010 Chip resistor 3.9KΩ J 1/16W (RoHS)
1
R633
T3G
80 3001054790000 Chip resistor 4.7Ω J 1/16W (RoHS)
1
R308
T3A
81 3001054790000 Chip resistor 4.7Ω J 1/16W (RoHS)
1
R310
T3A
82 3001054790000 Chip resistor 4.7Ω J 1/16W (RoHS)
1
R403
B2E
83 3001054700000 Chip resistor 47Ω J 1/16W (RoHS)
1
R111
B4E
84 3001054700000 Chip resistor 47Ω J 1/16W (RoHS)
1
R123
B3F
85 3001054700000 Chip resistor 47Ω J 1/16W (RoHS)
1
R618
T4G
86 3001054700000 Chip resistor 47Ω J 1/16W (RoHS)
1
R619
T3G
21
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
87 3001054710000 Chip resistor 470Ω J 1/16W (RoHS)
1
R201
T2D
88 3001054710000 Chip resistor 470Ω J 1/16W (RoHS)
1
R503
T3H
89 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R112
B3E
90 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R206
T3G
91 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R434
B2F
92 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R511
B2H
93 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R512
B1E
94 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R525
B2G
95 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R608
T4C
96 3001054720000 Chip resistor 4.7KΩ J 1/16W (RoHS)
1
R622
T5C
97 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R106
B3E
98 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R205
T4D
99 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R217
T3D
100 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R610
T4B
101 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R611
T4B
102 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R612
T4B
103 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R616
T4G
104 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R617
T4G
105 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R620
T4B
106 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R624
T4E
107 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R630
T2G
108 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R631
T3H
109 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R638
T4E
110 3001054730000 Chip resistor 47KΩ J 1/16W (RoHS)
1
R643
T5G
111 3001054740000 Chip resistor 470KΩ J 1/16W (RoHS)
1
R517
B3H
112 3001054740000 Chip resistor 470KΩ J 1/16W (RoHS)
1
R519
B4H
113 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R102
B4H
114 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R124
B4F
115 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R127
B3F
116 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R302
T3A
117 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R632
T3G
U1
118 3001058230000 Chip resistor 82KΩ J 1/16W (RoHS)
1
R632
T3G
U2
119 3001056830000 Chip resistor 68KΩ J 1/16W (RoHS)
1
R642
T4D
120 3001056840000 Chip resistor 680KΩ J 1/16W (RoHS)
1
R501
B3H
121 3001057520000 Chip resistor 7.5KΩ J 1/16W (RoHS)
1
R118
B3E
U1
122 3001051030000 Chip resistor 10KΩ J 1/16W (RoHS)
1
R118
B3E
U2
123 3001060000000 Chip resistor 0Ω J 1/10W (RoHS)
1
L105
B3F
124 3001060000000 Chip resistor 0Ω J 1/10W (RoHS)
1
L115
B2H
125 3001061010000 Chip resistor 100Ω J 1/10W (RoHS)
1
R418
T2B
126 3001061010000 Chip resistor 100Ω J 1/10W (RoHS)
1
R605
T3A
127 3001066820000 Chip resistor 6.8KΩ J 1/10W (RoHS)
1
R416
B2D
128 3001061020010 Chip resistor 1KΩ J 1/10W (RoHS)
1
R416
B2D
129 3001064700000 Chip resistor 47Ω J 1/10W (RoHS)
1
R410
B2D
130 3001064700000 Chip resistor 47Ω J 1/10W (RoHS)
1
R415
B3C
22
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
131 3001066810010 Chip resistor 680Ω J 1/10W (RoHS)
1
R625
T4A
132 3099080398000 Chip resistor 0.39Ω J 1/4W (RoHS)
1
R419
T3B
133 3099080398000 Chip resistor 0.39Ω J 1/4W (RoHS)
1
R420
T3B
134 3099080398000 Chip resistor 0.39Ω J 1/4W (RoHS)
1
R421
T3B
135 3005051020010 Integrated resistor 1K J 1/16W (RoHS)
1
RN101
T4F
136 3101050590010 Chip capacitor 0.5PF B 50V (RoHS)
1
C109
B3E
137 3101050590010 Chip capacitor 0.5PF B 50V (RoHS)
1
C144
B3F
138 3101051590000 Chip capacitor 1.5PF B 50V (RoHS)
1
C431
B3A
139 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C401
B2F
U1
140 3101050500010 Chip capacitor 5PF B 50V (RoHS)
1
C401
B2F
U2
141 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C428
B3A
142 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C433
B3A
143 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C449
B3G
144 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C502
B2B
145 3199052290000 Chip capacitor 2.2PF B 50V (RoHS)
1
C110
B3E
U1
146 3101050200010 Chip capacitor 2PF B 50V (RoHS)
1
C110
B3E
U2
147 3101050300000 Chip capacitor 3PF B 50V (RoHS)
1
C130
B3E
U1
148 3101052790000 Chip capacitor 2.7PF C 50V (RoHS)
1
C130
B3E
U2
149 3101050300000 Chip capacitor 3PF B 50V (RoHS)
1
C501
B2B
150 3101053690000 Chip capacitor 3.6PF B 50V (RoHS)
1
C432
B3A
U1
151 3101052490010 Chip capacitor 2.4PF B 50V (RoHS)
1
C432
B3A
U2
152 3199054790000 Chip capacitor 4.7PF C 50V (RoHS)
1
C430
B3A
U1
153 3101054790040 Chip capacitor 4.7PF B 50V (RoHS)
1
C430
B3A
U2
154 3101050600010 Chip capacitor 6PF B 50V (RoHS)
1
C148
B3E
U1
155 3101055690080 Chip capacitor 5.6PF C 50V (RoHS)
1
C148
B3E
U2
156 3101050600010 Chip capacitor 6PF B 50V (RoHS)
1
C453
B2F
U1
157 3101052200010 Chip capacitor 22PF J 50V (RoHS)
1
C453
B2F
U2
158 3101050900000 Chip capacitor 9PF B 50V (RoHS)
1
C112
B3F
U1
159 3101050800000 Chip capacitor 8PF B 50V (RoHS)
1
C112
B3F
U2
160 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C103
B5G
161 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C104
B4G
162 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C107
B3E
163 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C118
B4G
164 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C151
B3F
165 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C414
B4F
166 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C439
B2F
167 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C448
B3G
168 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C452
B3G
169 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C530
T2H
U1
170 3101051500020 Chip capacitor 15PF J 50V (RoHS)
1
C530
T2H
U2
171 3101051000020 Chip capacitor 10PF J 50V (RoHS)
1
C556
B4G
172 3101054700010 Chip capacitor 47PF J 50V (RoHS)
1
C314
B4D
173 3101054700010 Chip capacitor 47PF J 50V (RoHS)
1
C315
B4H
174 3101054700010 Chip capacitor 47PF J 50V (RoHS)
1
C404
B2E
23
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
175 3101051500020 Chip capacitor 15PF J 50V (RoHS)
1
C421
B3B
U1
176 3101051200020 Chip capacitor 12PF J 50V (RoHS)
1
C421
B3B
U2
177 3101051500020 Chip capacitor 15PF J 50V (RoHS)
1
C544
B3H
U1
178 3101054790040 Chip capacitor 4.7PF B 50V (RoHS)
1
C544
B3H
U2
179 3101051500020 Chip capacitor 15PF J 50V (RoHS)
1
C638
T2E
180 3101051500020 Chip capacitor 15PF J 50V (RoHS)
1
C639
T2F
181 3101053300000 Chip capacitor 33PF J 50V (RoHS)
1
C415
B3D
U1
182 3101053900000 Chip capacitor 39PF J 50V (RoHS)
1
C415
B3D
U2
183 3101053300000 Chip capacitor 33PF J 50V (RoHS)
1
C526
B3H
184 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C117
B3F
185 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C119
B4F
186 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C121
B4F
187 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C124
B4F
188 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C125
B4F
189 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C127
B4G
190 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C131
B4E
191 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C150
B3F
192 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C152
B3F
193 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C202
B2E
194 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C512
B2B
195 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C516
B1E
196 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C523
B2H
197 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C614
T3G
198 3101051010030 Chip capacitor 100PF J 50V (RoHS)
1
C629
T4E
199 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C142
B3E
200 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C147
B3F
201 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C209
T5D
202 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C403
T2B
203 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C405
B2E
204 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C410
B2F
205 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C411
B2F
206 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C416
B3D
207 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C424
B2D
208 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C426
T2B
209 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C440
B3B
210 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C443
T2B
211 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C444
T3B
212 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C445
T2A
213 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C446
T2B
214 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C447
T2B
215 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C450
B4G
216 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C504
B2G
217 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C506
T2G
218 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C509
B2G
24
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
219 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C522
B4H
220 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C524
B2H
221 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C553
B4H
222 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C562
B3H
223 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C601
T3A
224 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C611
T3E
225 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C622
T4G
226 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C623
T4A
227 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C624
T4B
228 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C625
T4A
229 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C626
T4B
230 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C631
T2E
231 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C632
T2D
232 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C633
T2C
233 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C636
T2E
234 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C641
T1B
235 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C644
T2D
236 3101054710010 Chip capacitor 470PF K 50V (RoHS)
1
C657
T4D
237 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C102
B5G
238 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C105
B4E
239 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C111
B4G
240 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C120
B4H
241 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C126
B4H
242 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C133
B2E
243 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C139
B3E
244 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C141
B2E
245 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C145
B3E
246 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C215
B4F
247 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C216
T3D
248 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C219
T3D
249 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C412
B2D
250 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C413
B3D
251 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C417
B2C
252 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C425
B2B
253 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C427
B2B
254 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C518
B4G
255 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C539
B3I
256 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C558
B3H
257 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C563
B2H
258 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C604
B4C
259 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C605
T2E
260 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C608
T4D
261 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C613
T4D
262 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C616
T2G
25
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
263 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C617
T5D
264 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C619
T2H
265 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C620
T2H
266 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C640
T4C
267 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C648
T2G
268 3101051020010 Chip capacitor 1000PF K 50V (RoHS)
1
C651
T4C
269 3101054720000 Chip capacitor 4700PF K 50V (RoHS)
1
C204
T4E
270 3101054720000 Chip capacitor 4700PF K 50V (RoHS)
1
C549
T3H
271 3101054720000 Chip capacitor 4700PF K 50V (RoHS)
1
C554
B4H
272 3101054720000 Chip capacitor 4700PF K 50V (RoHS)
1
C561
B4H
273 3101054720000 Chip capacitor 4700PF K 50V (RoHS)
1
C647
T5E
274 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C138
B2E
275 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C437
B3B
276 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C508
T2G
277 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C510
T2H
278 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C513
T2G
279 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C514
T2H
280 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C540
B3I
281 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C552
T3H
282 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C559
T3H
283 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C607
T4D
284 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C612
T4D
285 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C635
T2E
286 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C637
T2F
287 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C645
T5C
288 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C646
T5C
289 3101051030020 Chip capacitor 0.01UF K 25V (RoHS)
1
C656
T5G
290 3101052230000 Chip capacitor 0.022UF K 16V (RoHS)
1
C550
T3H
291 3101052230000 Chip capacitor 0.022UF K 16V (RoHS)
1
C642
T3G
292 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C123
B5H
293 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C134
B3E
294 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C135
B2F
295 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C146
B3F
296 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C217
T2D
297 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C218
T2D
298 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C304
T3A
299 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C311
T3A
300 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C312
T3A
301 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C313
T3A
302 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C316
T3B
U1
303 3101053330000 Chip capacitor 0.033UF K 16V (RoHS)
1
C316
T3B
U2
304 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C422
T2B
305 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C436
B3B
306 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C438
T2A
26
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
307 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C441
T3B
308 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C519
T3H
309 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C520
B4H
310 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C528
B3G
311 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C537
T4G
312 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C546
B2G
313 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C555
B4H
314 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C557
T4I
315 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C560
T3I
316 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C603
B4C
317 3101051040060 Chip capacitor 0.1UF K 16V X7R (RoHS)
1
C654
T4D
318 3101052240010 Chip capacitor 0.22UF Z 10V Y5V (RoHS)
1
C208
T5D
319 3101052240010 Chip capacitor 0.22UF Z 10V Y5V (RoHS)
1
C649
T5D
320 3101052240010 Chip capacitor 0.22UF Z 10V Y5V (RoHS)
1
C653
T4D
321 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C203
T4E
322 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C207
T4E
U1
323 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C207
T4E
U2
324 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C547
B3G
325 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C627
T4E
326 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C628
T4E
327 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C630
T3E
328 3101051050000 Chip capacitor 1UF K 6.3V (RoHS)
1
C634
T2E
329 3101064740000 Chip capacitor 0.47UF K 25V (RoHS)
1
C302
T3B
330 3101061050020 Chip capacitor 1UF K 25V (RoHS)
1
C609
T5D
331 3101061050020 Chip capacitor 1UF K 25V (RoHS)
1
C610
T4D
332 3101061050020 Chip capacitor 1UF K 25V (RoHS)
1
C615
T2G
333 3101061050020 Chip capacitor 1UF K 25V (RoHS)
1
C621
T2H
334 3101062250000 Chip capacitor 2.2UF K 10V (RoHS)
1
C618
T5D
335 3104071050070 Tantalum capacitor 1UF M 16V (RoHS)
1
C420
B2C
336 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C128
B4G
337 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C140
B3E
338 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C201
T2E
339 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C206
T4E
340 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C305
T3A
341 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C442
T3A
342 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C602
B5B
343 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C606
T4C
344 3104074750070 Tantalum capacitor 4.7UF M 10V (RoHS)
1
C643
T4C
345 3102992000040 Trimmer capacitor 10pF ±2.5pF 55V (RoHS)
1
TC101
B3E
346 3210305479000 Multi-layer chip inductor 4.7nH S 300mA 0.18ohm (RoHS)
1
L513
B1E
347 3210305150010 Multi-layer chip inductor 15nH J 300mA 0.32ohm (RoHS)
1
C515
B1E
348 3210305150010 Multi-layer chip inductor 15nH J 300mA 0.32ohm (RoHS)
1
L504
B2H
349 3210305150010 Multi-layer chip inductor 15nH J 300mA 0.32ohm (RoHS)
1
L511
B3H
U1
350 3210305180000 Multi-layer chip inductor 18nH J 300mA 0.36ohm (RoHS)
1
L511
B3H
U2
27
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
351 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L111
B4F
352 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L114
B3G
353 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L401
B2E
354 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L404
B3F
355 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L416
B2F
356 3210305220000 Multi-layer chip inductor 22nH J 300mA 0.42ohm (RoHS)
1
L516
T2H
U1
357 3210305390000 Multi-layer chip inductor 39nH J 200mA 0.65ohm(RoHS)
1
L516
T2H
U2
358 3210305101000 Multi-layer chip inductor 100nH J 150mA 1.25ohm(RoHS)
1
L517
B2H
359 3210305101000 Multi-layer chip inductor 100nH J 150mA 1.25ohm (RoHS)
1
R509
T2G
360 3210305101000 Multi-layer chip inductor 100nH J 150mA 1.25ohm(RoHS)
1
R510
T2G
361 3210305101000 Multi-layer chip inductor 100nH J 150mA 1.25ohm(RoHS)
1
R513
T2G
362 3210305101000 Multi-layer chip inductor 100nH J 150mA 1.25ohm (RoHS)
1
R514
T2G
363 3210306479000 Multi-layer chip inductor 4.7nH S 450mA 0.20ohm (RoHS)
1
L405
B2D
364 3210306479000 Multi-layer chip inductor 4.7nH S 450mA 0.20ohm (RoHS)
1
L408
B3D
U1
365 3210306569000 Multi-layer chip inductor 5.6nH S 430mA 0.20ohm (RoHS)
1
L408
B3D
U2
366 3210305399000 Multi-layer chip inductor 3.9nH S 300mA 0.18ohm (RoHS)
1
R414
B3C
U1
367 3001060000000 Chip resistor 0Ω J 1/10W (RoHS)
1
R414
B3C
U2
368 3213306561000 Multi-layer chip inductor 0.56uH K 35mA 1.55Ω Q:15(RoHS)
1
L411
B2B
369 3213306102000 Multi-layer chip inductor 1uH K 25mA 0.6Ω Q:35(RoHS)
1
L110
B4G
370 3213306102000 Multi-layer chip inductor 1uH K 25mA 0.6Ω Q:35(RoHS)
1
L201
T4D
371 3213306222000 Multi-layer chip inductor 2.2uH K 15mA 1.15Ω Q:35(RoHS)
1
L509
B3H
372 3213306332000 Multi-layer chip inductor 3.3uH K 15mA 1.55Ω Q:35(RoHS)
1
L102
B4E
373 3213306332000 Multi-layer chip inductor 3.3uH K 15mA 1.55Ω Q:35(RoHS)
1
L103
B4E
374 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L101
B4E
375 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L106
B2E
376 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L107
B4H
377 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L108
B3G
378 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L109
B4G
379 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L113
B3G
380 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L202
T5D
381 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L417
B2E
382 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L602
T2E
383 3221506601000 Bead 600Ω 100MHz ±25% 500mA(RoHS)
1
L603
T3D
384 3221506601000 Bead 600Ω 100MHz ±25% 500mA(RoHS)
1
L605
T4E
385 3221506601000 Bead 600Ω 100MHz ±25% 500mA (RoHS)
1
L606
T4E
386 3221507600000 Bead 60Ω 100MHz ±25% 3000mA (RoHS)
1
L410
B3B
387 3221507600000 Bead 60Ω 100MHz ±25% 3000mA (RoHS)
1
L601
T4B
388 3221507600000 Bead 60Ω 100MHz ±25% 3000mA (RoHS)
1
L607
T4C
389 3221507221000 Bead 220Ω 100MHz ±25% 2000mA (RoHS)
1
L407
B3D
390 3231301250000 Air-core inductor E2-0.30*1.2*5TL (RoHS)
1
L406
B3D
391 3210108270000 Wire-wound chip inductor 27nH J 560mA 0.051ohm (RoHS)
1
L104
B3E
U1
392 3210108230010 Wire-wound chip inductor 23nH J 590mA 0.046ohm (RoHS)
1
L104
B3E
U2
393 3210209102010 Wire-wound chip inductor 1uH M 445mA 0.5ohm （RoHS）
1
L415
B2A
394 3231351640000 Air-core inductor E2-0.35*1.6*4TL(RoHS)
1
L412
B3A
28
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
395 3231351640000 Air-core inductor E2-0.35*1.6*4TL(RoHS)
1
L413
B3A
396 3231351640000 Air-core inductor E2-0.35*1.6*4TL(RoHS)
1
L414
B3A
397 3231351640000 Air-core inductor E2-0.35*1.6*4TL(RoHS)
1
L501
B2B
398 3231351650000 Air-core inductor E2-0.35*1.6*5TL(RoHS)
1
L409
B3B
399 3304060300050 Varactor HVC350BTRF-E (RoHS)
1
D101
B4E
400 3304060300050 Varactor VR:15V 16.4pF/1VR 5.5pF/4VR(RoHS)
1
D102
B4E
401 3304040200000 Varactor VR:30V 19.7pF/1VR 2.1pF/28VR(RoHS)
1
D103
B3E
402 3303030800040 Switching diode 35V 100mA 0.8V/10mA (RoHS)
1
D501
B2B
403 3303060300010 Switching diode 60V 100mA 0.8V/10mA(RoHS)
1
D105
B3E
404 3303060300010 Switching diode 60V 100mA 0.8V/10mA (RoHS)
1
D502
B1F
405 3303060300010 Switching diode 60V 100mA 0.8V/10mA (RoHS)
1
D503
B1F
406 3303060300010 Switching diode 60V 100mA 0.8V/10mA (RoHS)
1
D504
B1H
407 3303060300010 Switching diode 60V 100mA 0.8V/10mA (RoHS)
1
D505
B1H
408 3303060300010 Switching diode 60V 100mA 0.8V/10mA (RoHS)
1
D616
B2F
409 3303060300010 Switching diode 60V 100mA 0.8V/10mA(RoHS)
1
D617
B2G
410 3307110100080 LED 15mcd 25mA 2.2V (RoHS)
1
D601
T4A
411 3307110100080 LED 15mcd 25mA 2.2V (RoHS)
1
D603
B5A
412 3307110100060 LED 200mcd 30mA 1.9V (RoHS)
1
D602
T4A
413 3307110100060 LED 200mcd 30mA (RoHS)
1
D604
B5A
414 3309030600000 Zener Diode 6.1V (RoHS)
1
D605
T4B
415 3411002000020 NPN transistor 50V 150mA (RoHS)
1
Q101
B2E
416 3411002000020 NPN transistor 50V 150mA (RoHS)
1
Q608
T4D
417 3404002000000 NPN transistor 20V 100mA (RoHS)
1
Q102
B3F
418 3403008000010 BRT Vce:50V VIoff:0.5V VIon:3V 100mA(RoHS)
1
Q103
B2F
419 3403008000010 BRT Vce:50V VIoff:0.5V VIon:3V 100mA(RoHS)
1
Q405
T2B
420 3403008000010 BRT Vce:50V VIoff:0.5V VIon:3V 100mA(RoHS)
1
Q501
T2G
421 3403008000010 BRT Vce:50V VIoff:0.5V VIon:3V 100mA(RoHS)
1
Q604
T2G
422 3403008000010 BRT Vce:50V VIoff:0.5V VIon:3V 100mA(RoHS)
1
Q605
T4F
423 3401002000990 NPN transistor10V 30mA (RoHS)
1
Q104
B4F
424 3401002000990 NPN transistor10V 30mA (RoHS)
1
Q105
B3F
425 3401001000490 PNP transistor 50V 150mA (RoHS)
1
Q201
T3D
426 3401001000490 PNP transistor 50V 150mA (RoHS)
1
Q607
T5G
427 3503020000030 N-MOSFET VDS:30V ID:100mA VGS(th):3.0V(RoHS)
1
Q202
T2D
428 3408002000030 NPN transistor 12V 100mA (RoHS)
1
Q401
B2F
429 3408002000030 NPN transistor 12V 100mA (RoHS)
1
Q406
B3F
430 3408002000030 NPN transistor 12V 100mA (RoHS)
1
Q505
B3H
431 3408002000030 NPN transistor 12V 100mA (RoHS)
1
Q506
B3H
432 3502010000130 N-MOSFET VDS:10V ID:500mA VGS(th):0.7V(RoHS)
1
Q402
B3D
433 3403007000020 BRT Vce:50V VIoff:0.3V VIon:1.4V 70mA (RoHS)
1
Q404
T2B
434 3403007000020 BRT Vce:50V VIoff:0.3V VIon:1.4V 70mA (RoHS)
1
Q502
T2G
435 3410001000020 PNP transistor 15V 500mA 135~600 (RoHS)
1
Q601
T2G
436 3410001000020 PNP transistor 15V 500mA 135~600 (RoHS)
1
Q602
T2H
437 4301080000020 Momentary contact switch 12VDC 0.05A (RoHS)
1
SW601
T3A
438 4301080000090 Momentary contact switch 12VDC 0.05A (RoHS)
1
SW604
T1B
29
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
439 4301080000090 Momentary contact switch 12VDC 0.05A (RoHS)
1
SW605
T1D
440 3602999000000 Audio amplifier 1W 2.2~5.5V 62dB (RoHS)
1
U301
T3A
441 3605008005070 Operational amplifier3~32V 300mW 100dB (RoHS)
1
U401
T2B
442 3610999000060 SCM 100Pin (RoHS)
1
U601
T3F
443 3609049000010 Power management IC LDO 3V 300mA(RoHS)
1
U602
T5D
444 3612031000510 Memory EEPROM 16KB 1.8~5.5V(RoHS)
1
U603
T4G
445 3609006000000 Reset IC 2.7V (RoHS)
1
U605
T5E
446 3701212540030 TCXO 21.25MHz 2.8~3.0V ±1.5ppm (RoHS)
1
XT101
B4G
447 6201648000000 VCO shielding mask 0.30mm 00 (RoHS)
1
448 6201651000000 Filter shielding mask 0.20mm 00 (RoHS)
1
449 7000183000000 Heat-sinking device3*5*1.5mm 00 (RoHS)
1
450 3001053330000 Chip resistor 33KΩ F 1/16W (RoHS)
1
R125
B4H
451 3210305330000 Multi-layer chip inductor 33nH J 200mA 0.58ohm(RoHS)
1
L503
B2H
452 3001056820000 Chip resistor 6.8KΩ J 1/16W (RoHS)
1
R208
T4D
453 3001056820000 Chip resistor 6.8KΩ J 1/16W (RoHS)
1
R524
B4H
454 3001056820000 Chip resistor 6.8KΩ J 1/16W (RoHS)
1
R529
B2G
455 5205006000010 Earpiece jack LGK1503-03xx (RoHS)
1
J202
B4C
456 3399990000080 Zener Diode 6.8V (RoHS)
1
D301
T3A
457 3399990000080 Zener Diode 6.8V (RoHS)
1
D402
B2D
458 3399990000080 Zener Diode 6.8V (RoHS)
1
D403
B3C
459 3399990000080 Zener Diode 6.8V (RoHS)
1
D607
B4C
460 3399990000080 Zener Diode 6.8V (RoHS)
1
D608
B4D
461 3399990000080 Zener Diode 6.8V (RoHS)
1
D610
T4H
462 3701327610060 Crystal 32.768KHz ±20ppm 12.5pF (RoHS)
1
X601
T2F
463 3002991030160 Trimmer resistor 10K ±25% 0.15W (RoHS)
1
VR101
B4H
464 3001058200000 Chip resistor 82Ω F 1/16W (RoHS)
1
R526
B3G
465 3001064710000 Chip resistor 470Ω J 1/10W (RoHS)
1
R609
B5A
466 3001064710000 Chip resistor 470Ω J 1/10W (RoHS)
1
R634
B5A
467 3101050390000 Chip capacitor 0.3PF B 50V (RoHS)
1
C534
B3H
468 3101051040010 Chip capacitor 0.1UF Z 25V (RoHS)
1
C220
T3D
U1
469 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C220
T3D
U2
470 3101051040010 Chip capacitor 0.1UF Z 25V (RoHS)
1
C536
B2G
U1
471 3101051040060 Chip capacitor 0.1UF K 16V (RoHS)
1
C536
B2G
U2
472 3101051800010 Chip capacitor 18PF J 50V (RoHS)
1
C106
B4E
U1
473 3101051200020 Chip capacitor 12PF J 50V (RoHS)
1
C106
B4E
U2
474 3101052700000 Chip capacitor 27PF J 50V (RoHS)
1
C418
B3B
U1
475 3101054700010 Chip capacitor 47PF J 50V (RoHS)
1
C418
B3B
U2
476 3101052700000 Chip capacitor 27PF J 50V (RoHS)
1
C517
B2H
U1
477 3101052200010 Chip capacitor 22PF J 50V (RoHS)
1
C517
B2H
U2
478 3210105100000 Multi-layer chip inductor 10nH J 300mA 0.26ohm (RoHS)
1
L508
B3H
U1
479 3210305120000 Multi-layer chip inductor 12nH J 300mA 0.28ohm(RoHS)
1
L508
B3H
U2
480 3210105100000 Multi-layer chip inductor 10nH J 300mA 0.26ohm (RoHS)
1
L514
B3H
U1
481 3210305120000 Multi-layer chip inductor 12nH J 300mA(RoHS)
1
L514
B3H
U2
482 3418001000010 NPN transistor10V 50mA 150 (RoHS)
1
Q503
B2H
30
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
483 41003203000H0 PCB board 4L 4P H (RoHS)
1
PCB
484 3101051810010 Chip capacitor 180p J 50V (RoHS)
1
C507
B3G
485 3101050100030 Chip capacitor 1PF B 50V (RoHS)
1
C423
B3B
U1
486 3101050300000 Chip capacitor 3PF B 50V (RoHS)
1
C423
B3B
U2
487 3101050100030 Chip capacitor 1PF B 50V (RoHS)
1
C527
T2H
488 3101050100030 Chip capacitor 1PF B 50V (RoHS)
1
C545
B3H
489 1616100001420 Built-in software for HYT conventioanl portable radio(RoHS)
1
C545
490 3001051820000 Chip resistor 1.8KΩ J 1/16W (RoHS)
1
R114
B3E
491 3001055620000 Chip resistor 5.6KΩ J 1/16W (RoHS)
1
R117
B3F
U1
492 3001057520000 Chip resistor 7.5KΩ J 1/16W (RoHS)
1
R117
B3F
U2
493 3001064730000 Chip resistor 47KΩ J 1/10W (RoHS)
1
R411
B2D
U1
494 3001062730000 Chip resistor 27KΩ D 1/10W (RoHS)
1
R411
B2D
U2
U1
U2
495 3001061830000 Chip resistor 18KΩ D 1/10W (RoHS)
1
R412
B2D
496 3001066830000 Chip resistor 68KΩ J 1/10W (RoHS)
1
R417
B2C
U1
497 3001064730000 Chip resistor 47KΩ J 1/10W (RoHS)
1
R417
B2C
U2
498 3101058200000 Chip capacitor 82PF J 50V (RoHS)
1
C538
T4G
499 3101052400010 Chip capacitor 24PF J 50V (RoHS)
1
C541
B3H
500 3104071060080 Tantalum capacitor 10UF M 6.3V (RoHS)
1
C132
B4G
501 3303240000000 Switching diode 75V 200mA 1.25V 6ns(RoHS)
1
D104
B3E
502 3504990000040 Power amplifier MOSFET 10uA 25V 10uA 7.2V 7W(RoHS)
1
Q403
B3C
503 3101050500010 Chip capacitor 5PF B 50V (RoHS)
1
C434
B3A
U1
504 3101050300000 Chip capacitor 3PF B 50V (RoHS)
1
C434
B3A
U2
505 3101050500010 Chip capacitor 5PF B 50V (RoHS)
1
C451
B4G
506 3104081550030 Tantalum capacitor 1.5UF M 16V (RoHS)
1
C115
B5E
507 3101061300000 Chip capacitor 13PF J 50V (RoHS)
1
C419
B2B
U1
508 3101061200000 Chip capacitor 12PF J 50V (RoHS)
1
C419
B2B
U2
509 3101061040020 Chip capacitor 0.1UF Z 25V (RoHS)
1
C114
B4F
510 3101061040020 Chip capacitor 0.1UF Z 25V (RoHS)
1
C116
B5E
511 3101064710000 Chip capacitor 470PF K 50V (RoHS)
1
C655
T4F
512 3001052200000 Chip resistor 22Ω J 1/16W (RoHS)
1
R639
T5D
513 3303030300000 Schottky barrier diode 40V 30mA 0.26V/1mA (RoHS)
1
D612
T5E
514 3303030300000 Schottky barrier diode 40V 30mA 0.26V/1mA (RoHS)
1
D619
T3H
515 3101054740000 Chip capacitor 0.47UF Z 6.3V(RoHS)
1
C548
T3G
U1
516 3101051050000 Chip capacitor 1UF K 6.3V(RoHS)
1
C548
T3G
U2
517 3101054740000 Chip capacitor 0.47UF Z 6.3V Y5V(RoHS)
1
C652
T4E
518 3615042000010 Power management IC 4.2V 1.2A (RoHS)
1
U606
T4C
519 3399990000260 Rectifier Diode 10V 15mA 380mV/1mA (RoHS)
1
D508
B1B
520 3001058220000 Chip resistor 8.2KΩ J 1/16W (RoHS)
1
R407
T2B
521 3001058220000 Chip resistor 8.2KΩ J 1/16W (RoHS)
1
R430
B3F
522 3001055610000 Chip resistor 560Ω J 1/16W (RoHS)
1
R126
B3G
523 3210305180000 Multi-layer chip inductor 18nH J 300mA 0.36ohm (RoHS)
1
L112
B3G
524 3001051220000 Chip resistor 1.2KΩ J 1/16W(RoHS)
1
R523
B3H
525 3001051220000 Chip resistor 1.2KΩ J 1/16W(RoHS)
1
R636
T3G
526 3603042004860 IF processor IC 10.245MHz (RoHS)
1
U608
B4H
31
TC-320 Service Manual
No.
Part No.
Description
Qty. Ref No. Print No. Remark
527 3001056810000 Chip resistor 680Ω J 1/16W (RoHS)
1
R515
528 3404001000040 NPN transistor45V 100mA (RoHS)
1
Q611
T3H
529 3604007000000
1
U101
B4G
530 3001059120000 Chip resistor 9.1K J 1/16W (RoHS)
1
R635
T3G
U1
531 3001058220000 Chip resistor 8.2KΩ J 1/16W (RoHS)
1
R635
T3G
U2
532 3001052220010 Chip resistor 2.2KΩ F 1/16W (RoHS)
1
R502
T3H
U1
533 3001052220000 Chip resistor 2.2KΩ J 1/16W (RoHS)
1
R502
T3H
U2
534 3305180300000 Diode 100mA max 1Ω(RoHS)
1
D401
B2B
535 5205005000100 USB connector 5Pin 0.5mm 9.9*9.2*4.0mm(RoHS)
1
J201
B4D
536 3803040560030 SAW Filter 405MHz ±5MHz 3.5dB(RoHS)
1 SAWF50
G2
U1
537 3803045560000 SAW Filter 455MHz ±5MHz 4.5dB(RoHS)
1 SAWF50
G2
U2
538 3803041560000 SAW Filter 415MHz ±5MHz 3.5dB(RoHS)
1 SAWF50
G1
U1
539 3803046560040 SAW Filter 465MHz±6MHz 4.0dB(RoHS)
1 SAWF50
G1
U2
540 3803041060000 SAW Filter 410MHz ±10MHz 3.5dB(RoHS)
1 SAWF50
G2
U1
541 3803046060000 SAW Filter 460MHz ±10MHz 3.5dB(RoHS)
1 SAWF50
G2
U2
542 3920450300000 Frequency detector 100mv±40mv 450KHz ±4kHz
1
CD501
T4H
543 3801045030390 Ceramic filter 450KHz ±6.0KHz
1
CF501
B4I
544 3802021750090 Crystal filter UM-5 21.7MHz ±6KHZ
1
XF501
B3I
PLL IC 1.2GHZ(RoHS)
32
B4H
TC-320 Service Manual
Adjustment Description
Required Test Instruments:
Radio communication test set (HP8921)
1 set
10V/3A regulated DC power supply
1 set
Digital voltmeter
1 set
Ammeter
1 set
Preparations:
Place the board to be tested on the test fixture (please ensure good connection between each test point
and the fixture), and connect the board to a power supply with DC voltage of 3.8V.
Wired Clone
1. Operations:
1) Connect two radios using a clone cable. Power on the source radio while holding down SK, and it will
enter Wired Clone Mode after 2 seconds. The target radio can be directly turned on to enter user
mode.
(2) In Wired Clone mode, press SK of the source radio to switch between User Clone Mode and Factory
Clone Mode (check the Factory Clone Mode option when programming or you will fail to switch.).
3) Hold down PTT key of the source radio to clone data to the target radio. You can clone the data to
multiple target radios in the same way.
2. LED Indications:
Status of the source radio:
During the cloning process, the LED solidly glows red. Once it finishes, the LED will solidly glow green.
Clone errors:
(1). User clone. Once clone begins, frequency band and radio ID (Model ID) will be checked. The LED
glows orange for 2 seconds and then goes out to indicate a failed check. If the check is successfully
carried out but error occurs during data cloning, the LED will flash orange. In this situation, press any
key other than the Power Switch to turn it off.
(2) Factory Clone: If error occurs during data cloning, the LED will flash orange. In this situation, press
any key other than the Power Switch to turn it off. Hold down PTT to initiate a new clone process.
Status of the target radio:
33
TC-320 Service Manual
The LED solidly glows green during the cloning process and goes out once it finishes.
3. Differences between Factory Clone Mode and User Clone Mode:
(1) User Clone Mode: Only clone the data of user mode. Test parameters like adjustment frequencies,
adjustment items and baseband parameters will not be cloned.
(2) Factory Clone Mode: Clone all the data excluding serial No.
4. Instructions:
(1) Error will occur when data is cloned without cable connection. Please refer to 2-(2).
(2) Error may occur during test data clone in Factory Clone Mode if you wrongly press the side key and
switch into User Clone mode (LED flashes red once).
(3) If battery of the source radio runs low in clone mode, red LED will flash and low battery alert will be
given as well.
Adjustment
1. Description of Adjustment Procedures:
(1) Power on the radio while holding down PTT and SK for more than 2s to enter adjustment mode (the
LED flashes orange). After the keys are released, the radio will enter the adjustment item in this mode
(the item entered depends on the position where the Channel Selector knob locates). And the LED will
glow red/green for adjustment items in TX/RX groups respectively.
(2) Or connect the programming cable to the radio for real-time adjustment in PC mode.
2. Description of Adjustment Items:
(1) Switch of Wide/Narrow Bandwidth and Frequency in an Adjustment Item:
In an adjustment item, short press SK to switch between wide and narrow bandwidth. The default
adjustment point is the first frequency (low frequency) of current bandwidth. Short press PTT to switch
among different frequencies after selecting a bandwidth.
(2) Adjustment Items Include:
TX Items:
TX Frequency Tolerance and VCO Lock Voltage.
Note: These items are adjusted outside the adjustment mode via hardware.
TX Low Power, TX High Power, CDCSS Waveform, CDCSS Deviation, CTCSS Deviation (low), CTCSS
Deviation (medium), CTCSS Deviation (high), TX Low Voltage Threshold and Max. Deviation.
Note: These items are adjusted inside the adjustment mode.
34
TC-320 Service Manual
RX Items:
VCO Lock Voltage (outside the mode), Squelch and RX Low Voltage Threshold.
3. Specific Operations and Requirements:
(1) Conventional Adjustment Items (outside the adjustment mode): TX Frequency Tolerance, VCO Lock
Voltage.
(Note: The configuration file has preset CH1, CH2 and CH3 as wide bandwidth with low, medium and
high frequency respectively and CH4, CH5 and CH6 as narrow bandwidth with low, medium and high
frequency respectively. Make sure the antenna or load is connected before adjustment.)
Test
Adjustment
Specification/
Item
Condition
Test
Test point
Part
Method
Remarks
Instrument
Adjust VR101
Rotate the
with ceramic
TX
Channel
Communication
Frequency
tuning tool to
Antenna
Selector knob to
VR101
test set
Tolerance
≤150Hz
control the center
CH1 and press
frequency within
PTT to transmit.
the error range.
Rotate the
Channel
Digital
Selector knob to
voltmeter
CV
Check
2.2V~2.6V
Check
≥0.5V
CH3 and press
TX VCO
PTT to transmit.
Lock
Voltage
TC101
Rotate the
Channel
Selector knob to
CH1 and press
PTT to transmit.
35
TC-320 Service Manual
Adjust TC101
Rotate the
with ceramic
Channel
tuning tool until
Selector knob to
the lock voltage
2.2V~2.6V
RX VCO
CH3.
meets the
Lock
TC101
requirements.
Voltage
Rotate the
Channel
Check
≥0.5V
Selector knob to
CH1.
(2) Adjustment in the Adjustment Mode (Note: Make sure the antenna or load is connected before
adjustment; rotate the Channel Selector knob to save the adjusted values automatically.)
Test
Item
Condition
Test
Adjustment
on/
Test
Part
Instrument
point
Communica
Antenna
tion Test Set
Connect
/ Ammeter
or
Specificati
Method
Remarks
Rotate the Channel
Selector knob to
TX Power
CH2 and select low
frequency.
High
Power
Press [+] or [-]
key to adjust
the output
power, and
Short press PTT key
rotate the
to switch among
Channel
different frequencies
Selector knob
(low, medium and
to save it.
1.8-2.2W
I≤1.4A
high)
Low
Power
Rotate the Channel
Press [+] or [-]
Selector knob to
key to adjust
0.5W±0.2W
CH1 and select low
the output
I≤0.8A
frequency.
power, and
36
TC-320 Service Manual
Short press PTT key
rotate the
to switch among
Channel
different frequencies
Selector knob
(low, medium and
to save it.
high)
Rotate the Channel
Communica
Selector knob to
tion test set
CH3 and “wide
BPF:
Antenna
bandwidth” and “low
<20Hz~300
Adjust the
frequency” are
Hz
waveform to
selected.
VR6
CDCSS Waveform
make it
Short press PTT to
01
switch among
similar to
frequencies; and
square
long press PTT to
waveform.
switch between
wide and narrow
band.
Rotate the Channel
Selector knob to
Press [+] or [-]
CDCSS
CH4 and “wide
key to make
Deviation
bandwidth” and “low
adjustment
Wide
frequency” are
until the
Bandwidt
600~900Hz
selected.
CDCSS
h
Short press PTT key
deviation
to switch among
meets the
different frequencies
requirements.
(low, medium and
high)
37
TC-320 Service Manual
Short press SK key
to enter the “narrow
Press [+] or [-]
bandwidth” and
key to make
select low
adjustments
frequency.
until the
Short press PTT key
CDCSS
to switch among
deviation
different frequencies
meets the
(low, medium and
requirements.
Narrow
Bandwidt
350~550Hz
h
high)
Rotate the Channel
Selector knob to
CH5, CH6 and CH7
Use [+] or [-]
with CTCSS
key to make
respectively
slight
Communica
Wide
corresponding to:
CTCSS
adjustment
tion Test Set
Bandwidt
Antenna
low, medium and
Deviation
until the
:<20Hz~300
h
high frequencies.
CTCSS
Hz
Short press PTT key
deviation
to switch among
meets the
different CTCSS
requirements.
frequencies on each
channel.
38
600~900Hz
TC-320 Service Manual
Use [+] or [-]
On CH5, CH6 and
key to make
CH7, short press SK
slight
key to enter “narrow
Narrow
adjustment
bandwidth”, and
Bandwidt
until the
350~550Hz
short press PTT key
h
CDCSS
to switch among
deviation
different
meets the
frequencies.
requirements.
Wide
Bandwidt
h
Rotate the Channel
Use [+] or [-]
Selector knob to
key to ensure
CH9.
Short press SK key
that the
to switch between
specifications
wide
and
narrow
bandwidth.
Communica
3.7~4.3KHz
meet the
tion Test Set
requirements.
Antenna
BPF:
Maximum
Rotate the
Earpiec
<20Hz~15k
Frequency
Channel
e
Narrow
Hz
Deviation
Selector knob
1.7～
Socket
Bandwidt
AF:1kHz
to save the
120mV
value after
2.3KHz
h
wide and
narrow
bandwidth
adjustment.
Wide
Modulation
Rotate the Channel
Communica
Selector knob to
Bandwidt
Sensitivity
h
CH9.
Short press SK key
tion Test Set
BPF:
39
Check
3.0KHz
TC-320 Service Manual
to switch between
Narrow
Bandwidt
wide
and
<20Hz~15k
narrow
bandwidth.
Hz
1.5KHz
AF:1kHz
h
13±3mV
TX
Low
Rotate the Channel Selector
knob to CH8.
Voltage
Digital
voltmeter
Threshold
Power
Pow
Adjust output
≤3.40V:
Supply
er
voltage of the
the
Port
Sup
power supply
continuous
ply
to 3.42V, and
alert tone
press [+] or [-]
will sound to
key to sample
indicate
the current
transmissio
value.
n inhibition.
(3) RX Circuit Adjustment
Item
Condition
Specificati
Test
Part
Instrument
Method
on/
Remarks
Rotate the
Channel
Selector knob
Adjust the
to CH10 and
output
SQL level 5 ON
is set. Press [+]
Squelch
On
signals of
Communicati
or [-] key to
on Test Set
sample current
SSG:-119dB
Wide
value. At this
Bandwidth
time, wide
MOD:1KHz
bandwidth and
DEV:3KHz
low frequency
Filter: 0.3～
are selected.
3KHz
m
Short press PTT
SSG to the
squelch
Antenna
level. Rotate
level (Level
Earpiece
the Channel
5):
Socket
Selector
knob to save
the value
after
three-point
key to switch the
adjustment.
frequency (low,
medium and
high).
40
Squelch
-121±1dB
m
TC-320 Service Manual
Short press SK to
enter “narrow
band”. Press [+]
or [-] key to
Narrow
Bandwidth
adjust squelch
level. Short press
PTT key to
switch the
frequency.(low,
Communicati
on Test Set
Squelch
SSG:-118dB
m
Same as
MOD:1KHz
above.
DEV: 1.5KHz
Filter:
level(Level
5):
-120±1dB
m
0.3～
3KHz
medium and
high)
Rotate the
Channel
Adjust the
Selector knob
output
to CH11 and
SQL level 5 ON
Communicati
is set. Press [+]
on Test Set
or [-] key to
SSG:-121dB
Wide
sample current
m
Bandwidth
value. At this
MOD:1KHz
time, wide
DEV:
3KHz
bandwidth and
Filter:
0.3～
low frequency
3KHz
Squelch
are selected.
Off
Short press PTT
to switch the
signals of
SSG to the
squelch
Squelch
level. Rotate
level (Level
the Channel
5):
Selector
-122±1dB
knob to save
m
the value
Antenna
after
Earpiece
three-point
Socket
adjustment.
frequency.
Short press SK
to enter “narrow
Communicati
band”. Press [+]
on Test Set
Squelch
or [-] key to
SSG:-120dB
Narrow
sample the
m
Same as
level(Level
Bandwidth
current value.
MOD:1KHz
above.
5):
-121±1dB
m
Short press
DEV: 1.5KHz
PTT key to
Filter:
switch the
0.3～
3KHz
frequency.
RX Low
Voltage
Threshold
Rotate the Channel Selector
Digital
knob to CH12.
voltmeter
41
Power
Supply
Port
Adjust
Alert tone
output
will not be
voltage of
given
Power
the power
without red
Supply
supply to
LED
3.52V, and
flashing
press [+] or
when RX
[-] key to
voltage is
TC-320 Service Manual
sample the
3.52V.
current
value.
Communicati
on Test Set
Wide
Bandwidth
High,
low
medium,
frequency
out of the mode
SSG:-121dB
m
-119dBm
MOD:1KHz
or above
DEV: 3KHz
Filter:
0.3～
3KHz
Sensitivity
Communicati
on Test Set
Narrow
Bandwidth
High, medium,
low frequency
out of the mode
Antenna
Earpiece
Check
Socket
SSG:-120dB
m
-117dBm
MOD:1KHz
or above
DEV: 1.5KHz
Filter:
0.3～
3KHz
42
TC-320 Service Manual
Troubleshooting Flow Chart
Transmit Circuit
Start
Low TX
power
No sound
No
transmission
LED fails to
glow/flash.
Normal TX
power supply?
No
Replace
D602.
Check the TX
power supply.
Yes
Check the
voice channel
(Output ports of
MIC，U501,
U601,
MOD_OUT).
No
LED of D602
glows red？
TX VCO
locked?
No
Yes
Yes
Replace
D602.
Check the
TX channel.
Check the
antenna.
Check Q401,
Q402, Q403
and U501.
Check the
APC circuit.
43
Check the
TX VCO.
TC-320 Service Manual
Receive Circuit
44
TC-320 Service Manual
MCU
Start
Normal
power-on alert?
No
The speaker
works normally?
No
Replace the
speaker.
Yes
Yes
Normal VCC
(operating voltage of
MCU)?
No
Check U602.
Yes
Clock crystal
(X601) of MCU works
normally?
No
Replace X601.
Yes
Other pins control
normally?
No
Check battery
detect pin 40,
EEPROM detect
pin 83/84 and the
reset IC pin 93.
Yes
MCU works
normally.
45
TC-320 Service Manual
Disassembly and Assembly
Disassembly
1． Power off the radio
2． Remove the belt clip.
3． Remove the battery
a． Push the battery latch upwards;
b． Remove the battery cover;
c． Take out the battery by lifting its bottom side.
4． Remove the antenna
46
TC-320 Service Manual
5． Remove the Channel Selector knob, nut and waterproof ring
a． Detach the Channel Selector knob cover;
b． Unfasten the screw;
c． Remove Channel Selector knob;
d． Remove the nut and waterproof ring.
6． Disassemble chassis of the radio and the cover of PTT key.
a． Unfasten the 4 screws on the chassis;
b． Lift the bottom of the chassis;
c． Pull the chassis out.
d． Remove the cover of PTT key.
47
TC-320 Service Manual
7． Disassemble the main PCB
a． Remove the two fixing screws on the PCB;
b． Remove the PCB and supporting ring of the Channel Selector knob.
c． Beware of the speaker cable and the charging piece at the bottom.
整机充电极片piece
Charging
Assembly
1． Install the main PCB
a． Make sure that the speaker is well connected, and the charging piece on the bottom is correctly
installed;
b． Install the supporting ring of the Channel Selector knob;
c． Attach the main PCB;
d． Attach and secure two screws (Note: Control the torsion force within 0.8-1.2kgf);
e． Don’t damage the speaker cable during installation.
48
TC-320 Service Manual
整机充电极片
Charging piece
2． Assemble the chassis
a． Attach the cover of PTT key.
b． Attach the chassis of radio;
c． Attach and secure the four fixing screws (Note: Control torsion force within 1.2-1.5kgf).
3． Assemble the nuts and Channel Selector knob on the top
a． Attach and secure the nuts on the top of the radio (with a waterproof ring);
b． Attach the Channel Selector knob;
c． Attach and secure the fixing screw;
d． Attach and secure the Channel Selector knob cover;
49
TC-320 Service Manual
4． Assemble the antenna
5． Attach the battery
a． Insert the battery;
b． Attach the battery cover.
50
TC-320 Service Manual
6． Attach the belt clip
51
TC-320 Service Manual
Exploded View
49
1
2
3
4
12
5
6
48
47
15
14
23
22
21
20
19
18
17
11 10 9
13
7
8
16
30 31
29
33
32
28
34
46
24
45
35
27
25
36
37
26
38
39
42 43 44
40
41
52
TC-320 Service Manual
Parts List 2
No.
Part No
1
6201658001010
Encoder knob cover (RoHS)
1
2
7102006000100
Machine screw M2.0*6.0mm
1
3
6000718100000
Encoder knob (RoHS)
1
4
7206007400000
Fixing nut of encoder switch (RoHS)
1
5
6100335000000
O_RING for antenna (RoHS)
1
6
6000737100010
Light guide (charge LED) (RoHS)
1
7
6000736100000
Light guide (signal indicator) (RoHS)
1
8
6100363000010
POWER key (RoHS)
1
9
6201644000000
Speaker felt (steel) (RoHS)
1
10
7400229000000
Speaker felt (cloth) (RoHS)
1
11
7500250000000
Speaker washer (RoHS)
1
12
4210038000000
Cable (RoHS)
2
13
6000739000000
Accessory jack cover (RoHS)
1
14
6201643000000
Battery discharging piece (RoHS)
2
15
6000734000010
Radio chassis (RoHS)
1
Li-ion battery pack (RoHS)
1
16
Items
Qty (PCS).
17
7500249000000
Sponge pad for rear cover (RoHS)
2
18
6201796000000
metal holder of belt clip
1
19
7000205000000
Belt clip spring (RoHS)
1
20
7000181000000
Fender washer (RoHS)
1
21
6000836000010
Belt clip, black (RoHS)
1
22
7102505000200
Machine screw M2.5x4.8mm (RoHS)
2
23
7000206000000
Shaft for belt clip (RoHS)
1
24
6000733000000
Battery cover(RoHS)
1
25
7000179000000
Spring of battery latch(RoHS)
1
26
6000738000000
Battery latch(RoHS)
1
27
7102008020100
Self-tapping screw PT2.0*8.0mm(RoHS)
4
28
7600036000000
Shield of main unit (RoHS)
1
29
7400233000000
PCB shield (RoHS)
1
30
7400034000000
Speaker insulation pad (RoHS)
1
31
5001000000090
Speaker (RoHS)
1
32
7101904020200
Self-tapping screw ST1.9*4.0mm(RoHS)
1
33
6201671000000
Charging piece (RoHS)
2
34
7209802800010
Supporting ring of encoder switch (RoHS)
1
35
4304030000030
Gray code rotary switch (RoHS)
1
36
6201653000020
Antenna bracket (RoHS)
1
37
7101704020100
Self-tapping screw ST1.7*4.0mm(RoHS)
2
38
4301040000060
PTT switch (RoHS)
2
39
7600037000000
Conductive sponge (RoHS)
1
40
7600020000000
3M embossed copper foil (RoHS)
1
53
TC-320 Service Manual
41
Main PCB(RoHS)
1
42
5002230000010
MIC (RoHS)
1
43
6100111000010
MIC cover (silicone rubber) (RoHS)
1
44
7400077000000
MIC net (RoHS)
1
45
6000732001010
Front case (RoHS)
1
46
6300062001010
Decorative sheet (zink alloy) (RoHS)
1
47
6100365000000
PTT key (silicone rubber ) (RoHS)
1
48
6000735000020
PTT key (RoHS)
1
Antenna (RoHS)
1
49
Note: Parts that are not marked with part number may vary with radio frequency band.
54
TC-320 Service Manual
Packing Diagram
55
56
53
TC-320 PCB View
Top Layer
57
TC-320 PCB View
Bottom Layer
53
LPF
B201
发射部分
TX Section
-120dBm
W401
接收部分
RX Section
12mVrms
-121dBm
1
2
3
4
0
a1Vcc1b1
a2
b2
a3
b3
a4GNDb4
0
U601
5
6
7
8
66mVrms
-124.5dBm
SAW501/502
LO
Q102
Q503
-3dB
-3dBm
Q505
-106.5dBm
SAW503
Q406
58
7dB
-105dBm
-110dBm
Q401
XF501
17dB
-120dBm
-102dBm
Q402
Q506
版电平增益分配
TC-320 Level Diagram
a4
a3
a2
a1
26dB
4
3
2
1
U608
b4
b3
b2
b1
8
7
6
5
Q403
200mVrms
0
a1Vcc1b1
a2
b2
a3
b3
a4GNDb4
0
34dB
1
2
3
4
U601
4
3
2
1
a4
a3
a2
a1
33dB
186mVrms
LPF
5
6
7
8
U301
8
7
6
5
1.8Vrms
W401
b4
b3
b2
b1
A
B
C
PTT
SW604
SW PB
SW602
SW PB
MON
SW603
SW PB
V1
2
SW605
SW PB
V2
1
2
SW601
SW PB
1
1
1
2
1
2
2
G601
BATTERY
R602
R603
5
BUSY(SQL)
X601
APC
RFC
POWER
DOW
UP
MON
PTT
SW606
U604
CHARG
1
1 VCC
EC0
EC1
EC2
EC3
VCC
Q607
DC-DC
U601
T_LED
R_LED
CHARG
SAVE
U602
U605
RESET
2
D604
2
2
D603
1
Q605
EEPROM
QT_OUT
LED
2
LED
D602
1
U603
SCL
SDA
D
2
1
POWER
5
BAT
SW
SW
Q602
Q601
SW
Q604
TX_CTL
VR601
R632
R633
J201
XT101
4
VDD
V_SAVE
VR
VT
R103
C132
21.25M
MIC IN
MOD
CP
Speaker
+
-
B302
LOOP FILTER
D101
D102
MOD
3
59
CD501
D105
Q103
SW
LO
TX OUT
MC3361P
U608
CF501
Q608
D612
J202
Q102 D103
VCO
AF
MB15E03SL
U101
VOX
1
2
MIC
Q505
MIX
Q401
Q105
Q611
VCO_IN
Q406
TX/RX SW
R515
C553
C522
2
2
BUSY
D505
2
D617
D616
RFC
AT41511
D504
1
1
Q403
Q402
Q503
RF AMP
RF AMP
2
RF AMP
IF AMP
Q506
SWAF503
NFIL OUT
21.7M
XF501
PRE AMP
+
Q104
2
1
B201
TC-320 Block Diagram
3
TC-320H Block Diagram
RIPPLE FILTER
QT_OUT
OSCIN
CP
DATA/ STB/ CK
R204
C204
QT_MOD
QT_OUT
VCO_IN
LD(SIG OUT)
AF(DEMOD)
MOD_OUT
TXD
RXD
CHARG
U301
AMP
APA_EN
AF_OUT
4
NFIL IN
LO
2
2
Q501
Q502
SW
D503
D502
D501
W401
ANTENNA
Prepare:
Li Xiangjia
Check:
1
Date:
File No.:
Page:
TC-320 H
BLOCK DIAGRAM
Part Name:
of
1
Approve:
Rev:
V1.0
Wednesday, August 04, 2010
1
HYT Science&technology Co.Ltd.
1
1
APC
LPF
Model Name:
TX_OUT
SWAF502
SWAF501
U401
D401
1
1
A
B
C
D
A
B
C
C131
100p
R107
10k
TP100
CV
C105
1000p
MOD
V_SAVE
C401
2p
3
Q401
2SC4226
C139
1000p
0.01u
R111
47
L101
601s
5
R109
1k
R112
4.7k
C116
0.1u
D102
HVC350B
D101
HVC350B
L102
3.3uH
R413
10K
C405
470p
R403
4.7
22nH
L401
C404
47p
L103
3.3uH
C141
1000p
10p
TC101
C114
0.1u
C109
0.5p
L104
27nH
C107
10p
C115
1.5u/16V
R110
2.2k
C106
18p
2
C409
NC
L106
601s
L417
601s
C140
4.7u/10V
D104
Q101
BAS16XV2T1G 2SC5343E
3
2
C410
470p
1
C138
R401
3.3k
2
R404
330
1
2
1
D103
BB179
R106
47k
C142
470p
R113
100k
C145
1000p
HVC131
D616
1000p
C412
L405
4.7nH
C133
1000p
HVC131
D105
C130
3p
C110
2.2p
C117
100p
R411
47k
R410
47
R412
18k
1
Q402
2SK3078
3
2
R114
1.8k
R118
7.5k
R117
5.6k
L105
0
R119
10
L407
221s
4
C112
9p
C148
6p
1
C146
0.1u
L408
4.7nH
1
3 Q103
DTC114EE
2
R116
10k
R115
270
C144
0.5p
R124
68k
R417
68k
C135
0.1u
C134
0.1u
R415
47
C439
10p
C414
10p
L111
22nH
R123
47 C150
100p
3
R127
68k
R126
560
2
R431
3.9K
R430
8.2K
Q105
2SC5108
1
C151
10P
C411
470P
C453
6P
L112
18nH
60
Q406
2SC4226
22nH
L404
R429
10
3
C152
100p
R434
4.7K
1
D617
HVC131
C403
470P
2
1
3
2
470P
R433
100K
C504
470p
2
5
4
0.01u
C510
2
2
Q502
DTA114YE
3
+ -6
7
8
1
1
1
3
2
R511
4.7k
C426
470p
3
2- +
1
1
C447
470p
D505
HVC131
D504
HVC131
2
2
R510
100nH
1
1
C430
4.7p
SAWF502
HDF465A
4
4
R408
27k
C513
0.01u
C514
0.01u
2
C438
0.1u
D503
HVC131
1
1
R512
4.7k
1
L513
4.7nH
C502
2p
C434
5p
R409
10k
D402
EDZ6.8B
1
C501
3p
L501
4T
C432
3.6p
L414
4T
C433
2p
D502
HVC131
1
R509
100nH
2
2
R514
100nH
L413
4T
C431
1.5p
R407
8.2k
SAWF501
HDF455A
2
Q404
DTA114YE
3
R513
100nH
R406
15k
C445
470p
R405
1M
L412
4T
C429
NC
C428
2p
C422
0.1u
1
C427
1000p
C446
470p
Q501
DTC114EE
R428
10k
2
C459
NC
D401
HVU131
22nH
L416
L411
0.56uH
U401
NJM2904
R418
100
C425
1000p
1
L504
15nH
C506
470p
C444
470p
C511
NC
0.01u
C423
1p
R425
150k(1%)
C443
470p
C508
VR
100k(1%)
150k(1%)
Q405
DTC114EE
R427
R424
100k(1%)
R423
150k(1%)
VT
C421
15p
R426
C442
4.7u/10V
C419
13p
C509
C440
470p
C441
0.1u
C437
0.01u
R422
150k(1%)
0.39
0.39
V_BAT
R421
R420
C436
0.1u
C418
27p
0.39
L410
600sg
L409
5T
R419
V_SAVE
L113
601s
C424
470p
C420
1u/10V
1
Q403
RD07MUS2B
C417
1000p R416
6.8k
R414
3.9nH
Q104
2SC5108
1
C415
33p
C416
470p
3
TC-320
U(1) Schematic Diagram
(RF)
TC-320U1（400-420MHz）原理图
RF
D403
EDZ6.8B
Q102
PRF957
C147
470p
C413
1000p
L406
5T
4
2
1
R402
3.3k
2
1
2
1
1
2
1
2
3
2
5
2
1
3
2
C516
100p
1SS356
D501
TP505
ANTG
1
1
2
D
1
2
2
2
3
1
3
2
3
3
APC
L415
1uH
W401
ANTENNA
CP
R/T
VCO-IN
LO
RF-IN
RFC
D508
HSM88ASTL
1
C515
15n
C512
100p
A
B
C
D
A
B
C
C638
15p
VR601
NC
R224
12k
R223
0
BUSY
VOX
RFC
APC
R635
9.1K
R633
3.9k
R636
1.2K
2
R607
15K
5
QT_OUT
V_BAT
32.768K
X601
C642
0.022u
R206
4.7k
C639
15p
C632
470p
C641
470p
NC
C650
R632
68K
C605
1000P
R604
100
8
C
2
1
C
4
QT_MOD
6
5
4
SW606
SW_channel
1
2
3
C635
0.01u
C634
1u
C630
1u
L603 GREEN/KPT-1608SGC
601s
D601
VCC
C623
470p
470p
470p
R610
47k
470p
R611
47k
C626
R612
47k
C625 C624
R620
47k
VDD
C637
0.01u
C631
470p
C611
470p
C601
470p
VDD_CLD
AF_OUT
VSS_CLD
AF_OUTM
VDD_CLD1
RFC
APC
VREF
QT_OUT
VOX
VSSA
VDDA
38
SQL
BAT
XTAL0
XTAL1
PLL_CAP
44
45
46
47
48
49
50
SW601
ON/OFF
L602
601s
VCC
C633
470p
C644
470p
C636
470p
SW603
PTT
SW 605
DOWN
R603
220k(1%)
R602
220k(1%)
SW602
MON
R629
NC
R207
1k
SW 604
UP
2
1
2
1
1
2
3
2
100
MOD_OUT
DEMOD
MICIN
BG_REF
VDDA1
VSSA1
RESET
TX_CTL
R/T
VDDD1
VSSD1
STB
CK
DATA
LD
SDA
SCL
82
POWER
80
79
78
77
76
R605
100
U601
SRT3210
4
R627
NC
C622
470p
R626
NC
VCC
D605
R616
47k
RSA6.1EN
R628
NC
R617
47k
1
2
L607
600s
47
47
L601
600sg
C610
1u
0.01u
C607
C646
0.01u
3
61
C604
1000P
R608
4.7k
C647
4700p
VDD OUT
GND CD
R623
100
U605
R3112Q271A
4
3
C303
NC
3
4
1
2
6
C608
1000P
C645
0.01u
U301
AP4890
5
4
3
C655
470P
MIC
G601
3.8V
C653
0.22u
1
VDD
C657
470p
R642
68k
R641
2.2K
1
3
Q608
2SC5343E
V_SAVE
C613
1000p
3
2
2
C652
0.47u
C617
1000p
C656
0.01u
1
1
2
3
4
C206
4.7u/10V
R215
22k
R214
1k
TP609
TXD
C314
47p
VDD
D612
RB706F-40
C618
2.2u
C612
0.01u
Q607
2SA1832
VCC
3
R208
6.8k
R205
47k
2
R614
100
C201
4.7u/10V
R201
470
VIN
PPR
CHG
EN
U606
MC34673
BAT
ISET
FAST
GND
Q201
2SA1832
VDD
R643
47k
2
C609
1u
R637
1k
C204
4700P
R204
3.3k
8
7
6
5
R606
3.9k
R213
100k C216
1000p
3
R621
100
0.1u
C312
R308
4.7
TP203
SP2
C313
0.1u
C640
1000p
R639
22 C649 R645
0.22u
1k
C220
0.1u
L202
601s
Q605
DTC114EE
2
6
1
2
R311
10
C643
4.7u/10V
D301
EDZ6.8B
R203
3.3k
C654
0.1u
VIN VOUT1
EN1 VOUT2
EN2 GND
U602
RT9011J6
1u
C203
R310
4.7
0.1u
V_BAT
C305
4.7u/10V
C207
1u
0.1u
C304
+IN
VO1 5
-IN
VO2 8
SHUTDOWN
BYPASS
VDD GND 7
C602
4.7u/10V
R622
4.7k
C603
0.1u
C629
100p
VCC
0.47u
C302
R624
47k
L605
601s
R301
10k
C628
1u
VCC
R618 R619
V_BAT
U603
AT24C16
L606
601s
C627
1u
R309
1k
RED/KPT-1608SURC
D602
R625
680
R302
68K
V_BAT
EPAD
9
C311
2
R634
470
R638
47k
R640
1k
R615
2.2k
C614
100p
2
1
TP202
SP1
1
C202 2
100P
3
3
C217
0.1u
C621
1u
C648
1000p
Q601
2SA1745
R218
1M
D609
NC
C218
0.1u
2
R219
10k
C619
1000p
Q602
2SA1745
R631
47k
2
2
C651
1000p
1
5
4
3
2
1
1
C208
0.22u
D201
NC
C616
1000p
R/T
VSAVE
AF
MIC out
STB
CK
DATA
LD
QT_MOD
MOD
J201
USB
J202
MIC1
VT
C620
1000p
C615
1u
2
MIC
B201
L201
1uH
D606
NC
+
-
VR
1
2
3
4
5
1
D608 EDZ6.8B
C606
4.7u/10V
R630
47k
Q604
DTC114EE
R613
1K
2
Q202
2SK1824
R217
47k
R609
470
VOX
1
3
C219
1000P
C315
47p
TP608
RXD
D607
EDZ6.8B
R216
2.2k
2
R202
2.2K
1
2
1
2
1
C316
0.1u
4
3
D604
RED/KPT-1608SURC
TC-320 U(1)
Schematic Diagram MCU&POWER
(MCU&POWER)
TC-320U1（400-420MHz）原理图
2
2
1
2
1
D
3
1
5
1
2
1
2
1
25
24
PTT
MON
ON/OFF
20
V_
V+
VDDD
VSSD
15
14
GLED
RLED
EXT PTT
EXT MIC
SAVE
APA_EN
RXD
TXD
5
4
3
2
1
51
52
53
54
55
56
57
58
59
60
EN0
EN1
EN2
EN3
65
66
67
68
69
70
71
72
73
74
75
1
8
2
7
3 CLK
4 DAT
3
4
3
2
1
1
D603
GREEN/KPT-1608SGC
3
1
5
1
2
1
1
2
1
MIC out
MIC
D610
EDZ6.8B
C209
470p
1
2
1
A
B
C
D
A
B
C
VDD
RF-IN
VR101
10k
CP
VCO-IN
STB
CK
DATA
LD
VSAVE
QT_OUT
2
1
2
3
4
R101
10
5
C448
10p
RN101
1k
8
7
6
5
C124
100p
C123
0.1u
C127
100p
R103
22k
R125
33k
R104
1k
C132
10u/6.3V
L107
601s
C551
NC
3
C125
100p
OUT
C119
100p
16
15
14
13
12
11
10
9
XT101
21.25MHz
C102
1000p
R529
6.8k
R528
12k
C452
10p
C121
100p
R120
100k
R102 C126
68k
1000p
C120
1000p
L503
33nH
C517
27P
C507
180P
C104
10p
C449
2p
L114
22nH
OSCIN
ΦR
ΦP
LD/fout
ZC
PS
LE
Data
C451
5p
C450
470p
OSCOUT
Vp
Vcc
Do
GND
Xfin
fin
Clock
U101
MB15E03SL
C103
10p
L110
1uH
1
R525
4.7K
C523
100P
1
2
3
4
5
6
7
8
C118
10p
4
C215
1000P
R108
10
C556
10p
C530
10P
C536
0.1U
VDD
L109
601s
C543
NC
C563
1000p
C128
4.7u/10V
C111
1000p
R527
0R
Q503
AT-41511
L517
100nH
R526
82
VR
CF501
ALFYM450F(6.0K)
1
C547
1u
C525
NC
L516
22nH
R530
10
C560
0.1u
L108
601s
C527
1P
3
C557
0.1u
2
C528
0.1u
CD501
JTBM450C24
C519
0.1u
C546
0.1u
C518
1000P
C524
470p
3
62
C537
0.1U
MIXI
GND
N-REC
N-DET
RSSI
FILO
FILI
AFOUT
R502
2.2k
OSCI
OSCO
MIXO
VCC
IFI
DEC
IFO
QUAD
C538
82p
1
2
3
4
5
6
7
8
U608
MC3361BP
L512
NC
L510
0
16
15
14
13
12
11
10
9
LO
R534
3.3k
1
SAWF503
HDF460E
2
L115
0
2
C554
4700p
2
C561
4700p
C553
470p
C522
470p
470K
L511
15nH
C545
1p
VR
R535
NC
C555
0.1U
C552
0.01u
Q506
2SC4226
C520
0.1u
L507
NC
R519
L508
10nH
L514
10nH
R536
3.3k
C526
33p
C534
0.3p
4
R515
680
R524
6.8k
3
D
3
TC-320U1（400-420MHz）原理图 PLL&IF
4
3
2
4
C559
0.01U
R504
100k
R508
2.2k
C562
470p
R503
470
3
1
1
1
2
1
C548
0.47U
XF501
21.7MHz
R518
0
C541
24P
R516
10
D619
RB706F-40
C532
NC
C542
NC
0.022U
C550
2
Q505
2SC4226
R517
470k
D202
NC
R506
270
C549
4700p
C544
15p
Q611
BC847AW/PLP
VR
2
R501
680K
R507
2.2k
TC-320 U(1) Schematic Diagram (PLL&IF)
5
3
1
4
3
1
4
VCONT VCC
1
GND
2
3
1
2
1
5
2
1
R121
27K
R523
1.2K
L509
2.2UH
3
2
C539
1000P
AF
BUSY
C531
NC
R505
270
C558
1000p
C540
0.01u
VR
A
B
C
D
A
B
C
C131
100p
R107
10k
TP100
CV
C105
1000p
MOD
V_SAVE
C401
5p
3
Q401
2SC4226
C139
1000p
0.01u
R111
47
L101
601s
5
R109
1k
R112
4.7k
C116
0.1u
D102
HVC350B
D101
HVC350B
L102
3.3uH
R413
10K
C405
470p
R403
4.7
22nH
L401
C404
47p
L103
3.3uH
C141
1000p
10p
TC101
C114
0.1u
C109
0.5p
L104
23nH
C107
10p
C115
1.5u/16V
R110
2.2k
C106
12p
2
C409
NC
L106
601s
L417
601s
C140
4.7u/10V
D104
Q101
BAS16XV2T1G 2SC5343E
3
2
C410
470p
1
C138
R401
3.3k
2
R404
330
1
2
1
D103
BB179
R106
47k
C142
470p
R113
100k
C145
1000p
HVC131
D616
1000p
C412
L405
4.7nH
C133
1000p
HVC131
D105
C130
2.7p
1
C110
2p
C117
100p
R411
27k
R410
47
R412
18k
Q402
2SK3078
3
2
R114
1.8k
R118
10k
R117
7.5k
L105
0
R119
10
L407
221s
4
C112
8p
C148
5.6p
1
C146
0.1u
L408
5.6nH
1
3 Q103
DTC114EE
2
R116
10k
R115
270
C144
0.5p
3
2
R124
68k
R417
47k
C135
0.1u
C134
0.1u
R415
47
C439
10p
C414
10p
L111
22nH
100p
R123
47 C150
R127
68k
R126
560
2
R431
3.9K
R430
8.2K
C453
22P
L112
18nH
Q406
2SC4226
22nH
L404
R429
10
63
C152
100p
3
1
R434
4.7K
D617
HVC131
C403
470P
2
1
3
2
470P
R433
100K
C504
470p
5
4
0.01u
C510
2
2
Q502
DTA114YE
3
+ -6
7
8
1
1
1
3
2
C447
470p
D505
HVC131
D504
HVC131
2
2
R510
100nH
1
1
C430
4.7p
SAWF502
HDF465A
4
4
R408
27k
C513
0.01u
C514
0.01u
2
C438
0.1u
D503
HVC131
1
1
R512
4.7k
1
L513
4.7nH
C502
2p
C434
3p
R409
10k
D402
EDZ6.8B
1
C501
3p
L501
4T
C432
2.4p
L414
4T
C433
2p
D502
HVC131
1
R509
100nH
2
2
R514
100nH
L413
4T
C431
1.5p
R407
8.2k
SAWF501
HDF455A
2
Q404
DTA114YE
3
R513
100nH
R406
15k
C445
470p
R405
1M
L412
4T
C429
NC
C428
2p
C422
0.1u
1
C427
1000p
C446
470p
Q501
DTC114EE
R428
10k
2
C459
NC
D401
HVU131
R511
4.7k
C426
470p
3
2- +
1
1
NC
L416
L411
0.56uH
U401
NJM2904
R418
100
C425
1000p
1
L504
15nH
C506
470p
C444
470p
C511
NC
0.01u
C423
3p
R425
150k(1%)
C443
470p
C508
VR
100k(1%)
150k(1%)
Q405
DTC114EE
R427
R424
100k(1%)
R423
150k(1%)
VT
C421
12p
R426
C442
4.7u/10V
C419
12p
C509
C440
470p
C441
0.1u
C437
0.01u
R422
150k(1%)
0.39
0.39
V_BAT
R421
R420
C436
0.1u
0.39
L410
600sg
L409
5T
C418
47p
R419
V_SAVE
Q105
2SC5108
1
C151
10P
C411
470P
3
L113
601s
C424
470p
C420
1u/10V
1
Q403
RD07MUS2B
C417
1000p R416
1k
R414
0
Q104
2SC5108
1
C415
39p
C416
470p
TC-320U2（450-470MHz）原理图 RF
TC-320 U(2) Schematic Diagram (RF)
D403
EDZ6.8B
Q102
PRF957
C147
470p
C413
1000p
L406
5T
4
2
1
R402
3.3k
2
1
2
1
1
2
1
2
3
2
5
2
1
3
2
C516
100p
1SS356
D501
TP505
ANTG
1
1
2
D
1
2
2
2
3
1
3
2
3
3
APC
L415
1uH
W401
ANTENNA
CP
R/T
VCO-IN
LO
RF-IN
RFC
D508
HSM88ASTL
1
C515
15n
C512
100p
A
B
C
D
A
B
C
C638
15p
VR601
NC
R224
12k
R223
0
BUSY
VOX
RFC
APC
R635
8.2K
R633
3.9k
R636
1.2K
2
R607
15K
5
QT_OUT
V_BAT
32.768K
X601
C642
0.022u
R206
4.7k
C639
15p
C632
470p
C641
470p
NC
C650
R632
82K
C605
1000P
R604
100
8
C
2
1
C
4
QT_MOD
6
5
4
SW606
SW_channel
1
2
3
C635
0.01u
C634
1u
C630
1u
L603 GREEN/KPT-1608SGC
601s
D601
VCC
C623
470p
470p
470p
R610
47k
C625 C624
R611
47k
470p
R612
47k
C626
R620
47k
VDD
C637
0.01u
C631
470p
C611
470p
C601
470p
VDD_CLD
AF_OUT
VSS_CLD
AF_OUTM
VDD_CLD1
RFC
APC
VREF
QT_OUT
VOX
VSSA
VDDA
38
SQL
BAT
XTAL0
XTAL1
PLL_CAP
44
45
46
47
48
49
50
SW601
ON/OFF
L602
601s
VCC
C633
470p
C644
470p
C636
470p
SW603
PTT
SW 605
DOWN
R603
220k(1%)
R602
220k(1%)
SW602
MON
R629
NC
R207
1k
SW 604
UP
2
1
2
1
1
2
3
2
100
MOD_OUT
DEMOD
MICIN
BG_REF
VDDA1
VSSA1
RESET
TX_CTL
R/T
VDDD1
VSSD1
STB
CK
DATA
LD
SDA
SCL
82
POWER
80
79
78
77
6
R605
100
SRT3210
U601
4
R627
NC
C622
470p
R626
NC
VCC
D605
R616
47k
RSA6.1EN
R628
NC
R617
47k
1
2
L607
600s
47
47
L601
600sg
C610
1u
3
0.01u
C607
C646
0.01u
C604
1000P
R608
4.7k
C647
4700p
VDD OUT
GND CD
R623
100
U605
R3112Q271A
4
3
C303
NC
3
4
1
2
6
C608
1000P
C645
0.01u
U301
AP4890
64
5
4
3
C655
470P
MIC
G601
3.8V
C653
0.22u
1
VDD
C657
470p
R642
68k
R641
2K
1
3
Q608
2SC5343E
R645
560
V_SAVE
C613
1000p
3
2
2
C652
0.47u
C617
1000p
C656
0.01u
1
1
2
3
4
C206
4.7u/10V
R215
22k
R214
1k
TP609
TXD
C314
47p
VDD
D612
RB706F-40
C618
2.2u
C612
0.01u
Q607
2SA1832
VCC
3
R208
6.8k
R205
47k
2
R614
100
C201
4.7u/10V
R201
470
VIN
PPR
CHG
EN
U606
MC34673
BAT
ISET
FAST
GND
Q201
2SA1832
VDD
R643
47k
2
C609
1u
R637
1k
C204
4700P
R204
3.3k
8
7
6
5
R606
3.9k
R213
100k C216
1000p
3
R621
100
0.1u
C312
R308
4.7
TP203
SP2
C313
0.1u
C640
1000p
R639
22 C649
0.22u
C220
0.1u
L202
601s
Q605
DTC114EE
2
6
1
2
R311
10
C643
4.7u/10V
D301
EDZ6.8B
R203
3.3k
C654
0.1u
VIN VOUT1
EN1 VOUT2
EN2 GND
U602
RT9011J6
1u
C203
R310
4.7
0.1u
V_BAT
C305
4.7u/10V
C207
0.1u
0.1u
C304
+IN
VO1 5
-IN
VO2 8
SHUTDOWN
BYPASS
VDD GND 7
C602
4.7u/10V
R622
4.7k
C603
0.1u
C629
100p
VCC
0.47u
C302
R624
47k
L605
601s
C628
1u
VCC
R618 R619
V_BAT
U603
AT24C16
L606
601s
C627
1u
R309
1k
RED/KPT-1608SURC
D602
R625
680
R301
10k
R302
68K
V_BAT
EPAD
9
C311
2
R634
470
R638
47k
R640
1k
R615
2.2k
C614
100p
2
1
TP202
SP1
1
C202 2
100P
3
3
C217
0.1u
C621
1u
C648
1000p
Q601
2SA1745
R218
1M
D609
NC
C218
0.1u
2
R219
10k
C619
1000p
Q602
2SA1745
R631
47k
2
2
C651
1000p
1
5
4
3
2
1
1
C208
0.22u
D201
NC
C616
1000p
R/T
VSAVE
AF
MIC out
STB
CK
DATA
LD
QT_MOD
MOD
J201
USB
J202
MIC1
VT
C620
1000p
C615
1u
2
MIC
B201
L201
1uH
D606
NC
+
-
VR
1
2
3
4
5
1
D608 EDZ6.8B
C606
4.7u/10V
R630
47k
Q604
DTC114EE
R613
1K
2
Q202
2SK1824
R217
47k
R609
470
VOX
1
3
C219
1000P
C315
47p
TP608
RXD
D607
EDZ6.8B
R216
2.2k
2
R202
2.2K
1
2
1
2
1
C316
0.033u
4
3
D604
RED/KPT-1608SURC
TC-320 U(2)
Schematic Diagram
(MCU&POWER)
TC-320U2（450-470MHz）原理图
MCU&POWER
2
2
1
2
1
D
3
1
5
1
2
1
2
1
25
24
PTT
MON
ON/OFF
20
V_
V+
VDDD
VSSD
15
14
GLED
RLED
EXT PTT
EXT MIC
SAVE
APA_EN
RXD
TXD
5
4
3
2
1
51
52
53
54
55
56
57
58
59
60
EN0
EN1
EN2
EN3
65
66
67
68
69
70
71
72
73
74
757
1
8
2
7
3 CLK
4 DAT
3
4
3
2
1
1
D603
GREEN/KPT-1608SGC
3
1
5
1
2
1
1
2
1
MIC out
MIC
D610
EDZ6.8B
C209
470p
1
2
1
A
B
C
D
A
B
C
VDD
RF-IN
VR101
10k
CP
VCO-IN
STB
CK
DATA
LD
VSAVE
QT_OUT
2
1
2
3
4
R101
10
5
C448
10p
RN101
1k
8
7
6
5
C124
100p
C123
0.1u
C127
100p
R103
15k
R125
33k
R104
1k
C132
10u/6.3V
L107
601s
C551
NC
3
C125
100p
OUT
R529
6.8k
C119
100p
16
15
14
13
12
11
10
9
XT101
21.25MHz
C102
1000p
C452
10p
C121
100p
R120
100k
R102 C126
68k
1000p
C120
1000p
L503
33nH
C517
22P
R528
12k
C104
10p
C449
2p
L114
22nH
OSCIN
ΦR
ΦP
LD/fout
ZC
PS
LE
Data
C451
5p
C450
470p
OSCOUT
Vp
Vcc
Do
GND
Xfin
fin
Clock
U101
MB15E03SL
C103
10p
L110
1uH
1
R525
NC
C523
100P
C118
10p
1
2
3
4
5
6
7
8
R526
82
4
C215
1000P
R108
10
C556
10p
C530
15P
C536
0.1U
VDD
L109
601s
C543
NC
C563
1000p
C128
4.7u/10V
C111
1000p
R527
0R
Q503
AT-41511
L517
100nH
2
4
L115
0
VR
CF501
ALFYM450F(6.0K)
1
C547
1u
C525
NC
L516
39nH
R530
10
C560
0.1u
L108
601s
C527
1P
3
C557
0.1u
2
C528
0.1u
CD501
JTBM450C24
C519
0.1u
C546
0.1u
C518
1000P
C524
470p
3
65
C537
0.1U
MIXI
GND
N-REC
N-DET
RSSI
FILO
FILI
AFOUT
R502
2.2k
OSCI
OSCO
MIXO
VCC
IFI
DEC
IFO
QUAD
C538
82p
1
2
3
4
5
6
7
8
U608
MC3361BP
L512
NC
L510
0
16
15
14
13
12
11
10
9
LO
R534
5.6k
1
SAWF503
HDF460E
2
C507
180P
3
2
C554
4700p
2
C561
4700p
C553
470p
C522
470p
470K
L511
18nH
C545
1p
VR
R535
NC
C555
0.1U
C552
0.01u
Q506
2SC4226
C520
0.1u
L507
NC
R519
L508
12nH
L514
12nH
R536
5.6k
C526
33p
C534
0.3p
4
R515
680
R524
6.8k
3
D
4
3
TC-320 U(2)TC-320U2（450-470MHz）原理图
Schematic Diagram (PLL&IF)
PLL&IF
5
C559
0.01U
R504
100k
R508
2.2k
C562
470p
C549
4700p
R503
470
3
1
1
1
2
1
C548
1U
XF501
21.7MHz
R518
0
C541
24P
R516
10
D619
RB706F-40
C532
NC
C542
NC
0.022U
C550
2
Q505
2SC4226
D202
NC
R506
270
Q611
BC847AW/PLP
VR
2
R501
680K
R507
2.2k
C544
4.7p
R517
470k
3
1
4
3
1
4
VCONT VCC
1
GND
2
3
1
2
1
5
2
1
R121
27K
R523
1.2K
L509
2.2UH
3
2
C539
1000P
AF
BUSY
C531
NC
R505
270
C558
1000p
C540
0.01u
VR
A
B
C
D
TC-320 Service Manual
Specifications
General Specifications
Frequency Range
U1:400-420MHz, U2:450-470MHz
Channel Capacity
16
Channel Spacing
25 KHz /12.5KHz
Operating Voltage
3.8V DC
Battery
1700mAh Li-Ion battery
Battery Life (5-5-90 Duty Cycle)
≥10 hours
Operating Temperature
-20℃~+55℃
Dimensions (H×W×D)
(with standard battery, without antenna)
100mm×48mm×27mm
Weight (with standard antenna & battery)
135g
Frequency Stability
±2.5ppm
Receiver
Sensitivity
≤0.25uV (25KHz)/0.316uV (12.5KHz)
Adjacent Channel Selectivity
≥60dB(W)/≥50dB(N)
Intermodulation
≥55dB
Spurious Response Rejection
≥55dB(W)/≥50dB(N)
Rated Audio Power Output
0.4W (Speaker impedance: 8 ohm)
Rated Audio Distortion
≤5% (0.4W)
Transmitter
RF Power Output
2W/0.5W
Spurious and Harmonics
≤-26dBm
Modulation Limiting
≤5/2.5KHz
TX S/N
≥38dB(W)/≥34dB(N)
Modulation Distortion
≤5%
Note: All Specifications are tested according to TIA/EIA-603, and subject to change without notice due to continuous
development.
66