Download IC-7100 SERVICE MANUAL

• EXPANDER (MAIN UNIT: IC7003)
PIN
No.
LINE
NAME
1
VTRS
3
HPR2S
3-5 VOLTAGE DIAGRAM
DESCRIPTION
I/O
VHF band 1st IF trap circuit switching.
High=While operating on 108.000000 to
143.999999 MHz.
O
HF/50 MHz/70 MHz band pre-AMP 2 control.
High=The Pre-AMP is ON.
O
HF/50 MHz/70 MHz band pre-AMP 1 control.
Low=The Pre-AMP is ON.
O
HF/50 MHz/70 MHz band attenuator control.
Low=The attenuator is ON.
O
Voltage from the power supply is routed throughout the
transceiver, through regulators and switches.
IC362
From the power supply
DC13.8V
REVERSE
CONNECT
PROTECT
Current
detect
TX power AMP,
Drive AMP
Fuse
(EP1)
D371,D372,D373
IC1001
4
6
HPR1S
HATTS
HV
DC-DC
H3R3V
USB HUB, USB bridge,
microSD card driver
Q1001 Q1002
3R3V
DSP
IC5061
15
B8
HF/50 HMz/70 MHz band select.
High=While operating on 60.000000 to
74.799999 MHz.
O
+1.2V
REG
• EXPANDER (MAIN UNIT: IC7004)
LINE
NAME
1
RSPS
4
ASQLS
1R8V
1st LO DDS,
1R3V
DSP (for DV mode)
IC5501
DESCRIPTION
I/O
Rear speaker mute control.
Low=External speaker output (Rear) is mute.
O
Squelch signal to the [ACC] and [DATA] connectors.
High=While the squelch is open.
O
+1.3V
REG
Q391
Q1401 to Q1403
IC1101
14V
DC-DC
5V
UMODS Modulation signal select.
High= USB audio signal is selected.
O
15
AFONS
O
T5V
T5
CTRL
Q1404
7
AF output mute control.
Low=The AF output is mute.
IF DSP Core
IC2204
+1.8V
REG
PIN
No.
1R2V
Common TX circuit.
Q1405
VT5V
T5
CTRL
VHF band TX circuit.
Q1407 Q1408
MAIN UNIT
T5
CTRL
UHF band TX circuit.
Q1410 to Q1412
IC1201
DC-DC
UT5V
8V
R8
CTRL
HR8V
HF band RX circuit.
Q1451 to Q1453
R8
CTRL
VR8V
VHF band RX circuit.
Q1454 to Q1456
UR8V
R8
CTRL
UHF band RX circuit.
Q1419 to Q1421
R8V
R8
CTRL
Common RX circuit.
Common TX circuit.
Q1416 to Q1418
T8V
T8
CTRL
Common TX circuit.
Q1413 Q1414
T8
CTRL
HF band TX circuit.
IC701
IC161
+8
REG
HT8V
F8V
DC-DC
F3R3V
Front CPU
DISPLAY UNIT
3-12