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WM-EX678
SERVICE MANUAL
AEP Model
UK Model
Ver 1.0 1999 . 01
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol a are trademarks
of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism
NEW
Tape Transport Mechanism Type
MT-WMEX672-162
SPECIFICATIONS
Tape section
Frequency response
(Dolby NR off)
Output
General
Power requirements
Dimensions (w/h/d)
Playback : 30 – 18,000 Hz
Headphones (REMOTE 2 jack)
Load impedance 8 – 300 Ω
1.5 V
One rechargeable battery or one R6 (size AA)
battery
Approx. 77.7 × 109.1 × 21.4 mm
(31/8 × 43/8 × 27/32 inches), incl.
projecting parts and controls
Mass
Approx. 140 g (5.0 oz.)
Approx. 205 g (7.3 oz)
(incl. rechargeable battery and cassette)
Supplied accessories
Battery case (1)
Stereo earphones with remote control (1)
Battery charger (1)
Rechargeable battery
(NC-6WM, 1.2 V, 600 mAh, Ni-Cd) (1)
Rechageable battery carrying case (1)
Carrying pouch (1)
Design and specification subject to change without notice.
CASSETTE PLAYER
MICROFILM
TABLE OF CONTENTS
1. SERVICE NOTE ······························································· 3
2. GENERAL ·········································································· 5
3. DISASSEMBLY
3-1. CASE BLOCK ASSEMBLY ·········································· 7
3-2. MAIN BOARD ······························································· 8
3-3. BELT (F2) ······································································· 8
3-4. MOTOR (F2) (M901) ····················································· 9
3-5. CASSETTE LID ASSEMBLY ······································· 9
3-6. REEL ORNAMENT ASSEMBLY ······························· 10
3-7. HOLDER ASSEMBLY ················································ 10
3-8. PINCH LEVER (N)/(R) ASSEMBLY ·························· 11
3-9. MAGNETIC HEAD (HP901) ······································· 11
4. MECHANICAL ADJUSTMENT ································ 12
5. ELECTRICAL ADJUSTMENT ·································· 12
6. DIAGRAMS
6-1. BLOCK DIAGRAM ····················································· 13
6-2. IC BLOCK DIAGRAMS ·············································· 15
6-3. PRINTED WIRING BOARD ······································· 16
6-4. SCHEMATAC DIAGRAM ··········································· 19
6-5. IC PIN FUNCTION ······················································ 22
7. EXPLODED VIEWS
7-1. CABINET BLOCK, MAIN BOARD ··························· 24
7-2. MECHANISM DECK BLOCK ···································· 25
8. ELECTRICAL PARTS LIST ······································· 26
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be
damaged by heat.
Flexible Circuit Board Repairing
• Keep the temperature of soldering iron around 270˚C
during repairing.
• Do not touch the soldering iron on the same conductor of the
circuit board (within 3 times).
• Be careful not to apply force on the conductor when soldering
or unsoldering.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH
MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE
COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS
APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS
PUBLISHED BY SONY.
—2—
SECTION 1
SERVISE NOTE
[Service Mode]
The service mode enables to operate the mechanism of WM-EX678
while the MAIN board is opened.
Rotation of the idler gear (A) (S side) is detected using the photoreflector (PH701) in the WM-EX678. PH701 is located on the
MAIN board, therefore the rotation of the idler gear (A) (S side)
cannot be detected by PH701 when the MAIN board is removed.
As a result, the motor cannot be controlled and cannot run correctly.
To repair the machine after the MAIN board is removed while the
main power is turned on, follow the procedures as described below.
3. FF, REW modes
1) Check that the PRE-SET status is set.
2) Connect square wave or sine wave to TP53 (P. IN) and TP14
(GND). (See illustration below.)
3) Press the p switch (S702) to enter the STOP mode.
4) Press the FF AMS switch (S704) and the REW AMS switch
(S705).
4. PLAY mode
1) Check that the PRE-SET status is set.
2) Connect square wave or sine wave to TP53 (P. IN) and TP14
(GND). (See illustration below.)
3) Press the p switch (S702) to enter the stop mode.
4) When the 9(REPEAT switch (S703) of the MAIN board
is pressed, the slider (N/R) moves once to the F side then moves
to the R side. When the FWD/REV switch (S701) is pressed
in the synchronism with the above timing, the machine can
enter the PLAY (R side) mode. Press the 9(REPEAT
switch (S703) again, and move the FWD/REV switch (S701)
in the synchronism with the motion of slider (NR). It enables
the machine to enter into the PLAY (F side) mode.
1. Setting
1) Remove the cabinets referring to section “3. DISASSEMBLY”.
Open the MAIN board.
2) Connect the motor (M901) and the plunger solenoid (PM901)
to the MAIN board using the jumper wires. When the extension
jig (1-769-143-11) (10 wires as a set) is used, they can be
connected easily.
3) Short the TAPE DETECT switch (S901-1) and the ATS switch
(S901-2).
4) Connect an AF oscillator to TP53 (P. IN) and TP14 (GND).
5) Connect DC 1.3 V from external regulated power supply to ‘
and ’ terminals of the battery.
Note 1: When you fail to enter the PLAY mode, re-start from step
1) PRE-SET status.
Note 2: Regarding the 9(REPEAT (S703), p (S702),
FF AMS (S704), and REW AMS (S705) switches, use
these switches of the remote control unit as much as possible.
Note 3: If a headphones are used, the beep sound shows the timing
of the FWD/REV switch (S701).
2. PRE-SET status
The PLAY, FF and REW modes can be entered only from the PRESET status.
1) Check that the slider (NR) is in the center position (S701), and
the FWD/REV switch is also in the center position. When
these switches are not in the center position, set them to the
PRE-SET status as follows.
2) Move the FWD/REV switch (S701) to the same position as the
slider (NR) is set.
3) The slider (NR) can be moved when the main power of the
regulated power supply is turned OFF once then back ON.
Move the FWD/REV switch (S701) to the center position in
synchronism with the timing when the slider (NR) is moved.
TAPE DETECT ATS
SWITCH
SWITCH
(S901-1)
(S901-2)
– MAIN BOARD (SIDE B) —
Plunger (PM901)
AF OSC
Square-wave (sine wave)
10 Hz, -3.5 dB
Battery terminal ‘
Battery terminal ’
+
Short
–
FF AMS
(S704)
TP53 (P.IN)
PH701
œREPEAT
REW AMS
(S705)
M M901
(S703)
p(S702)
S701
FWD←STOP→REV
TP14
(GND)
—3—
[ Slider (NR) ]
[ Tape drive mechanism ]
Tape drive mechanism in PLAY mode
Gear (NR)
(FWD : Left side
REV : Right side)
Idler Gear
Idler Gear (A)(S side)
(A)(T side)
Gear
Gear (REEL)(S side)
(REEL)(T side)
Motor Pulley
Cam Gear
Slider (NR)
F side R side
Center
Clutch Assy
Gear (Y)
Idler Gear
Pulley (Reverse)
Insert Flywheel (R)
Insert Flywheel (N)
Tape drive mechanism in FF mode
Idler Gear
(A)(T side)
Tape drive mechanism in REW mode
Gear (FR)
(REW : Right side)
Gear (FR)
(FF : Left side)
Gear
(REEL)(T side)
Motor Pulley
Cam Gear
Motor Pulley
Cam Gear
Clutch Assy
Clutch Assy
Gear (Y)
Gear (Y)
Pulley (Reverse)
Insert Flywheel (N)
Idler Gear
(A)(S side)
Gear
(REEL)(S side)
Insert Flywheel (R)
Insert Flywheel (N)
—4—
Pulley (Reverse)
Insert Flywheel (R)
SECTION 2
GENERAL
—5—
This section is extracted
from instruction manual.
SECTION 3
DISASSEMBLY
Note : Follow the disassembly procedure as shown in the flow chart below.
Set
Case block
assembly
Main board
Cassette lid
assembly
Reel ornament
assembly
Belt (F2)
Holder
assembly
Motor (F2) (M901)
Pinch lever (N/R)
assembly
Magnetic head
(HP901)
Note : Follow the disassembly procedure in the numerical order given.
3-1. CASE BLOCK ASSEMBLY
Claw
1 Battery case Lid
S707
3 Two screws
(M1.4 × 2.5)
2 Screw
(M1.4 × 2.5)
4 Two screws
(M1.4 × 2.5)
knob (HOLD)
Note:
When assembling the case block
assembly, align the knob (HOLD)
with the position of S707.
5 Remove the case block assembly
in the direction of the arrow.
—7—
3-2. MAIN BOARD
2 Remove soldering (four points)
from the leaf switch.
3 Remove soldering (two points)
from plunger solenoid.
S701
1 Remove soldering (six points)
from the head flexible boards.
5 Two screws
(M1.4)
7 MAIN board
Note : Be careful of the claw.
6 Screw
(M1.4)
4 Remove soldering
(four points) from motor.
Claw
Head flexible board
SLIDER
Note: When assembling the MAIN board,
align the slider with the position of S701.
3-3. BELT (F2)
2 Terminal board (Battery’)
3 Belt (F2)
1 Remove soldering from
the battery terminal board.
—8—
3-4. MOTOR (F2) (M901)
1 Two screws
(M1.4)
2 Motor (F2)
(M901)
3-5. CASSETTE LID ASSEMBLY
1 Screw
(M1.4 × 2)
5 Cassette Lid Assembly
2 Two screws
(M1.4 × 2)
3 Open the cassette lid.
4 Shaft
—9—
3-6. REEL ORNAMENT ASSEMBLY
1 Reel Ornamene Assembly
Note : Remove the assembly while removing
the 5 claws and the boss carefully.
Claw
Claw
Boss
Claw
Claw
Claw
3-7. HOLDER ASSEMBLY
2 Shaft
7 Cassette Bracket Assembly
5 Lock Lever (S)
3 Lock Lever (B)
4 Screw (Toothed Lock)
(M1.4)
1 Two screws
(M1.4 × 1.4)
6 Shaft
9 Remove the holder assembly
in the direction of the arrow.
8 Remove soldering from
six head flexible boards.
— 10 —
3-8. PINCH LEVER (N)/(R) ASSEMBLY
Claw
1 Remove the pinch lever (R)
assembly in the direction of the arrow.
Note : Be careful of the claw.
2 Remove the pinch lever (N)
assembly in the direction of the arrow.
Note : Be careful of the claw.
Claw
3-9. MAGNETIC HEAD (HP901)
Claw
1 Remove the magnetic head (HP901)
in the direction of the arrow.
Note : Be careful of the claw.
— 11 —
SECTION 4
MECHANICAL ADJUSTMENT
1.
2.
3.
4.
5.
SECTION 5
ELECTRICAL ADJUSTMENT
PRECAUTION
Clean the following parts with a denatured-alcohol-moistened
swab:
playback head
pinch roller
rubber belts
capstan
Demagnetize the playback head with a head demagnetizer.
Do not use a magnetized screwdriver for the adjustments.
After the adjustments, apply suitable locking compound to the
parts adjusted.
The adjustments should be performed with the rated power
supply voltage unless otherwise noted.
PRECAUTION
Specified voltage: 1.3 V (DC)
Switch position (MENU)
aNR
: OFF
AVLS
: OFF
BL SKIP
: OFF
MB/RV GRV : OFF
1.
2.
Test Tape
Tape
WS-48A
Signal
3 kHz, 0 dB
Used for
Tape Speed Adjustment
• Torque Measurement
Mode
Torque Meter
FWD
CQ-102D
FWD
Back Tension
CQ-102D
REW
CQ-102C
REW
Back Tension
CQ-102C
FF, REW
CQ-201B
Meter Reading
16 to 25 g•cm
(0.22 to 0.34 oz•inch)
0.5 to 1.5g•cm
(0.007 to 0.020 oz•inch)
16 to 25 g•cm
(0.22 to 0.34 oz•inch)
0.5 to 1.5 g•cm
(0.007 to 0.020 oz•inch)
More than 50 g•cm
(More than 0.69 oz•inch)
Tape Speed Adjustment
Procedure:
Test tape
WS-48A
(3kHz, 0dB)
Frequency counter
16 Ω
+
Set
–
2 REMOTE jack (J301)
1.
2.
3.
Enter the FWD playback mode.
Adjust RV601 so that the value of the frequency counter reading
becomes 3,000 Hz.
Specification value:
Frequency counter
2,970 Hz – 3,030 Hz
Check that the frequency deviation at the beginning and ending
of a tape is within 1.5 % (45 Hz).
Adjustment Point:
[MAIN BOARD] — SIDE B —
RV601
— 12 —
‘?
WM-EX678
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM
B+ SWITCH
Q305
RIPPLE FILTER
Q301
DDC B+
• SIGNAL PATH
: PLAYBACK
BATT B+
AUDIO MASTER AMP
IC301
R-CH
44
28
PW
IN-L
DOLBY NR
AMP
IC302
PW OUT-L
+
32
AVLS CONTROL
SWITCH
Q304
33
46
+
AMS
IN
PW OUT-C
BASS BOOST
AMP
PW
NF-L
V/I
40
EQ-L
R-CH
AGC
DET
AMS
R-CH
43
AGC IN
BST NF
BST OUT
PW IN C
LPF
EQ A
PW NF A
PW IN A
PW IN B
PW NF B
EQ B
–
+
BST
24 RF IN
23 PW GND
22 OUT B
–
+
22
PW B
21
21 OUT C
C-AMP SW 37
MT TC 38
BEEP
BATT B+
BEEP 39
VCC
29
DATA
30
REMO
PW A
+
–
PW C
BEEP
20 OUT A
19 VCC
AMS OUT 40
RIPPLE
FILTER
GND
35
39
MEGA BASS/GROOVE
SWITCHING
Q303
MT SW
PW SW
BST SW
F/R SW
PRE SW
M/N SW
41 42
S702 – 705
OFF
HOLD
R-CH
S901-1
(TAPE DETECT)
STOP
25
41
42
43
44
45
46
SWITCH
PRE A
17 RF OUT
16 GND
15 AMS DET
14
AMS MIX
13
AMS SW
PRE B
MIX
PRE GND 47
REVIVE/GROOVE
SWITCHING
Q302
18 BASE
COMPARATOR
+
–
FWD
30 29 28 27 26
20
S707
HOLD
S701
(DIRECTION)
32 31
AGC
DET
POWER AMP
AMS OUT
S901-2
(ATS)
12
PW OUT-R
+
PW
IN-C
BST
OUT
33
POWER AMP
R-CH
R-CH
34
POWER AMP
13
8
36 35
DET
2 REMOTE
+
–
R-CH
J301
VOL
SW
M/N SW
F/R SW
L-CH
VCC
+
–
METAL
CONTROL
MTL
DRV-L
BASE
RV301
OUT-L 5
EQ
R-CH
REV
4 IN-L
7
REV
IN-L
RF OUT
MT SW
PW SW
R-CH
PRE
OUT-L
19
BEEP
R-CH
PREAMP
14
VCC
18
AGC IN
5
FWD
FWD
IN-L
17
BST SW
1
IC301 TA2123F (EL)
R-CH: Same as L-CH
HP901
(PLAYBACK)
L-CH
6-2. IC BLOCK DIAGRAMS
VREF IN 48
VREF
REV
MTL DRV
14
DDC
B+
–
VSP
INA
OUTA
DCA
DETA
14
13
12
11
10
9
8
DDC B+
ROTATION DETECT
SENSOR
PH701
U
19
V
1
W
3
MOTOR
DRIVE
CIRCUIT
9
7
OSC
CIRCUIT
G1
16
PLUNGER
DRIVE
Q701
BIAS
START
REFERENCE
8
VOLTAGE
VDD B+
REGULATOR
IC704
GM
Q604
MOTOR
CONTROL SWITCH
3
4
5
OUTB
+
2
INB
1
GND
MOTOR
CONTROL SWITCH
Q601, 602-1
B-CH BLOCK: SAME AS A-CH.
VREF
5
DRY BATTERY
SIZE “AA”
(IEC DESIGNATION R6)
1P. 1.5V
IREF
DDC B+
DC/DC
CONVERTER
IC702
BATT B+
MOTOR
BRAKE SWITCH
Q602-2
AMS IN
PW
2
W
GND
3
4
OSC
5
DR
6
6
VREF
7
START
8
PRE DRIVER
MOTIVE
LOGIC
SOFT SWITCH
18
17
16
15
MOTIVE/
OSC
VSP
9
IN+ 10
BATTERY PACK
(NI-CD)
(NC-6WM 1.2V)
— 14 —
BIAS
REFERENCE
VOLTAGE
— 15 —
PU
GND
VCC
FC
14 TC1
13 TC2
SPEED
CONTROL
CURRENT
CONTROL
OUTPUT
BIAS
INVERTER
7
PM901
(PLUNGER)
— 13 —
MOTIVE
CONTROL
CIRCUIT
WEIGHT
CAPSTAN/REEL
MOTOR DRIVE
IC601
OSC
V
DR
W
1
A-CH BLOCK
DIRECTION CONTROL
DDC B+
V/I
V
SUM
U
6
PM CTL 17
+
–
BIAS
CIRCUIT
VREF
SWITCH &
LOGIC
CIRCUIT
20 PV
19 U
RESET SIGNAL
GENERATOR
IC703
10
DCB
M901
(CAPSTAN/REEL)
PHOTO CTL 18
PRE NF-B
PRE OUT A
VEXT
THP601
SW
IN+
G2
PHOTO REFLECTOR
SWITCH & BUFFER
Q702
12
IC601 MM1279XVBE
V+
COMPARATOR
OUT
+
SPEED
CONTROL
IN PHOTO 37
10 11
PRE OUT B
PRE NF-A
IC302 NJM2185AV-TE2
DETB
11
LED BATT 19
9
RV601
TAPE SPEED
Q603
SPEED
CONTROL
SWITCH
D703
BATT
8
MTL DRV B
7
MTL DRV A
6
IN B-R
BEEP
5
35
BATT
B+
X701
32.768kHz
4
IN A-R
13
1 2 3
IN A-F
IN B-F
VREF OUT
15
RESET
45
STOP 2 SET
44
DATA/RMUM
KEY IN
STOP 1 SET
6 16
BATT DET
12 11
MOTOR CTL
MUTE CTL
AMP CTL
36
SPEED CTL
7
REVIVE
CTL
48 46 47
10
BOOST CTL
29
39
AMS IN
28
8
MEGA BASS CTL
CTL DOLBY
38
MOTOR RESTART
MOTOR DIR
MOTOR BRK AVLS
CTL
1
XT1
5
XT0
CTL F/R
REV SW
CENTER SW
FWD SW
9
+
–
4 3 2
CASSETTE SW
SYSTEM CONTROLLER
IC701
–
+
12 R1
11 OUT
WM-EX678
6-4. SCHEMATIC DIAGRAM
1.3 Vp-p
30.5 µsec
2.8 Vp-p
11 µsec
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
•
%
: indicates tolerance.
• C : panel designation.
Note: The components identified by mark ! or dotted line
with mark ! are critical for safety.
Replace only with part number specified.
• U : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
no mark : PB
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production tolerances.
• Signal path.
E : PB
• Abbreviation
FR
: French
EE
: East European
— 19 —
— 20 —
— 21 —
WM-EX678
SECTION 7
EXPLODED VIEWS
6-5. IC PIN FUNCTION
• MAIN BOARD IC701 ML63512-119TBZ060 (SYSTEM CONTROL)
Pin No.
Pin Name
I/O
1
CTL DOLBY
O
2
FWD SW
3
CENTER SW
4
REV SW
5
CASSETTE SW
Description
Pin No.
Pin Name
I/O
Dolby ON/OFF control signal output to Dolby NR amplifier (IC302)
39
AMS IN
I
AMS detection signal input from TA2123F (IC301) “H”: No music
“L”: Dolby NR, ON, H: Dolby NR OFF
40
LED AVLS
O
Drive signal output for AVLS display Not used in this machine (empty terminal)
I
Detection switch (S701) input terminal “L”: FWD
41
LED BLSKIP
O
Drive signal output for BL SKIP display Not used in this machine (empty terminal)
I
Detection switch (S701) input terminal “L”: CENTER
42
LED MB
O
Drive signal output for MG GRV display Not used in this machine (empty terminal)
I
Detection switch (S701) input terminal “L”: REV
43
LED REVIVE
O
Drive signal output for RV GRV display Not used in this machine (empty terminal)
44
SPEED CTL
O
I
Cassette detection switch (S901-1) input terminal
“L”: with cassette “H”: without cassette
Serial data output of communication with the remote commander having phone, and the remote control sensing
6
DATA/RMUM
I/O
7
REVIVE CTL
O
signal input from remote commander having phone
9
10
MEGA BASS
CTL
F/R CTL
BOOST CTL
O
O
O
“L”: REVIVE “H”: OFF/MEGA BASS/GROOVE
Tone selection signal output to TA2123F (IC301)
“L”: MEGA BASS “H”: OFF/REVIVE/GROOVE
45
MOTOR CTL
O
46
MOTOR DIR
O
47
MOTOR BRK
O
FWD/REV selection signal output to TA2123F (IC301) “L”: FWD “H”: REV
Bass boost control signal output to TA2123F (IC301) “L”: OFF “H”: ON
Motor speed control signal output to capstan/reel motor drive IC (IC601)
•
•
RESTART
When indicating parts by reference number,
please include the board name.
13
23
not supplied
“H”: motor ON
Motor direction control signal output to capstan/reel motor drive IC (IC601)
12
“L”: clockwise “H”: counter-clockwise
11
Motor brake ON/OFF control signal output to capstan/reel motor drive IC (IC601)
30
14
14
15
“H”: brake ON (Normally “L” is input.)
Signal output for motor start-up status control to capstan/reel motor drive IC (IC601)
MOTOR
48
The mechanical parts with no reference number
in the exploded views are not supplied.
Abbreviation
FR : French
EE : East European
7-1. CABINET BLOCK, MAIN BOARD
“L”: normal “H”: half speed
Motor start control signal output to capstan/reel motor drive IC (IC601)
Tone selection signal output to TA2123F (IC301)
8
Description
NOTE:
• -XX, -X mean standardized parts, so they may
have some differences from the original one.
• Items marked “*” are not stocked since they
are seldom required for routine service. Some
delay should be anticipated when ordering these
items.
• Color Indication of Appearance Parts Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑
↑
Parts of Color Cabinet’s Color
O
“H”: during FF/REW motor rotating
Power supply ON/OFF control signal output to TA2123F (IC301)
11
AMP CTL
O
“L”: power supply OFF “H”: power supply ON
10
Power mute control signal output to TA2123F (IC301)
12
MUTE CTL
O
13
SET STOP1
I
Battery voltage detection input terminal when the machine is stopped. (A/D input)
14
SET STOP2
I
Reference voltage input terminal when the machine is stopped. (A/D input)
15
BATT DET
I
Battery voltage detection input terminal (A/D input)
16
KEY IN
I
Key input terminal (A/D input)
17
PM CTL
O
Plunger drive signal output “L”: plunger ON
9
O
19
LED BATT
O
LED (D703) drive signal output to BATT display “L”: LED ON
20
LED DOLBY
O
Drive signal output to aNR display Not used in this machine (empty terminal)
21
VDD1
–
Power supply terminal for external interface (+2.5 V)
22
VSS
–
Ground terminal
23
VDD
–
Power supply terminal (+1.5 V)
24
VDDH
–
Step-up power supply terminal for back-up
25
CB1
–
Terminal to which condenser for step-up power supply is connected
26
CB2
–
Terminal to which condenser for step-up power supply is connected
27
VDDL
–
Power supply terminal for internal logic
7
6
–
Terminal to which main system clock is connected (32.768 kHz)
29
XT1
–
Terminal to which main system clock is connected (32.768 kHz)
30
TAT1B
I
Test input terminal Normally, fixed to “H”.
31
TAT2B
I
Test input terminal Normally, fixed to “H”.
32
OSCM
–
Terminal to which external capacitor for oscillation is connected Not used in this machine (empty terminal)
OSC0
I
34
OSC1
O
35
RESET
I
36
BEEP
O
Beep sound output to TA2123F (IC301)
37
IN PHOTO
I
Rotation detection input of capstan/reel motor (M901)
38
AVLS CTL
O
AVLD ON/OFF control signal output “L”: AVLS OFF, “H”: AVLS ON
25
29
1
7
25
3
not supplied
1
2
Ref. No.
Terminal to which resistance for high-speed CR oscillation (800 kHz) is connected Not used in this machine
(empty terminal)
System reset signal input from the reset signal generator (IC703) “L”: reset
“L” is input for several hundreds msec after power supply starts up, then “H” is input.
— 23 —
Part No.
Description
Remarks
2
3
4
3-704-197-21 SCREW (M1.4 × 2.5), LOCKING (SILVER)
3-704-197-23 SCREW (M1.4 × 2.5), LOCKING (BLACK)
(AEP,FR,EE)
3-029-230-01 KNOB (HOLD)
3-029-227-01 PLATE (TERMINAL), ORNAMENTAL
3-029-233-51 LID, BATTERY CASE (SILVER)
4
5
6
7
8
3-029-233-61
3-345-648-71
3-029-213-01
3-375-114-41
A-3021-172-A
LID, BATTERY CASE (BLACK)(AEP,FR,EE)
SCREW (M1.4), TOOTHED LOCK
TERMINAL BOARD
SCREW
MAIN BOARD, COMPLETE (AEP,UK,EE)
8
9
10
11
12
A-3021-173-A
3-029-210-01
X-3376-278-1
3-366-892-11
3-029-217-01
MAIN BOARD, COMPLETE (FR)
TERMINAL BOARD (MINUS)
TERMINAL BOARD ASSY, BATTERY
SCREW (M1.4 × 1.4)
LEVER (B), LOCK
1
1
(empty terminal)
— 22 —
18
not supplied
19
1
Terminal to which resistance for high-speed CR oscillation (800 kHz) is connected Not used in this machine
33
17
5
4
“L”: rotation detection circuit ON
XT0
16
8
24
Control signal output to the rotation detection circuit of the capstan/reel motor
PHOTO CTL
23
MT-WMEX672-162
27
“L”: mute ON “H”: mute OFF
18
28
S901
28
(The power supply ON/OFF control of Dolby NR amplifier (IC302) is performed.)
Ref. No.
Part No.
Description
13
14
15
16
17
3-029-205-31
3-366-892-01
X-3376-277-1
X-3376-279-1
3-365-630-41
MD COVER
SCREW (M1.4)
BRACKET ASSY
BRACKET (CASSETTE) ASSY
SCREW (M1.4)
18
19
23
23
3-029-219-01
3-029-220-01
3-704-197-11
3-704-197-13
Remarks
24
KNOB (OPEN)
SPRING, TENSION
SCREW (M1.4 × 2.0), LOCKING (SILVER)
SCREW (M1.4 × 2.0), LOCKING (BLACK)
(AEP,FR,EE)
3-032-323-01 PAPER (A), SHIELD
25
27
28
29
30
3-032-805-01
3-309-595-11
3-031-460-01
3-032-905-01
3-328-483-11
S901
1-762-553-11 SWITCH, LEAF
— 24 —
SHEET (T1.6)
SHEET, INSULATING, PACK
SHEET (BT)
CUSHION (TO.4)
SHEET
7-2. MECHANISM DECK BLOCK
(MT-WMEX672-162)
67
64
63
60
M901
59
65
62
75
68
61
76
66
PM901
74
79
69
79
77
78
77
80
73
70
81
58
72
57
54
71
72
56
55
71
HP901
53
52
51
Ref. No.
Part No.
Description
Part No.
Description
51
52
53
54
55
X-3377-039-1
X-3376-295-1
3-029-271-01
X-3376-294-1
3-029-275-01
HOLDER ASSY (/M)
PINCH LEVER (R) ASSY
SPRING (HD)
PINCH LEVER (N) ASSY
WASHER (STOPPER N)
Remarks
Ref. No.
68
69
70
71
72
3-029-274-01
3-007-433-01
X-3377-037-1
3-010-274-02
3-010-954-01
RETAINER (F2), MOTOR
SHEET (N), REFLECTION
CHASSIS ASSY (F) (/M)
TABLE, REEL
SPRING (BT), COMPRESSION
56
57
58
59
60
3-029-278-01
3-029-276-01
3-029-289-01
X-3376-813-1
3-932-724-21
WASHER
WASHER (STOPPER R)
WASHER
CLUTCH ASSY (F)
WASHER
73
74
75
76
77
3-029-282-01
3-029-285-01
3-029-284-01
3-029-281-01
3-010-273-02
GEAR (Y)
GEAR, CAM
LEVER, TRIGGER
GEAR, IDLER (B)
GEAR (REEL)
61
62
63
64
65
3-029-287-01
3-386-694-01
3-029-306-11
3-029-280-01
3-029-268-11
SPRING (TG), TORSION
WASHER
FLYWHEEL (N), INSERT
BELT (F2)
FLYWHEEL (R), INSERT
78
79
80
81
HP901
3-029-273-01
3-029-283-01
3-029-286-01
3-029-288-01
1-500-576-11
GEAR (FR)
GEAR, IDLER (A)
GEAR (NR)
PULLEY, REVERSE
HEAD, MAGNETIC (PLAYBACK)
66
67
3-007-428-01 WASHER (R)
3-029-765-01 SCREW (M1.4), TOOTHED LOCK
M901
PM901
1-763-166-11 MOTOR (CAPSTAN/REEL) (WITH PULLEY)
1-454-674-32 SOLENOID, PLUNGER
— 25 —
Remarks
SECTION 8
ELECTRICAL PARTS LIST
MAIN
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts
specified in the diagrams or the components
used on the set.
• -XX, -X mean standardized parts, so they
may have some difference from the original
one.
• Items marked “*” are not stocked since they
are seldom required for routine service.
Some delay should be anticipated when
ordering these items.
Ref. No.
Part No.
•
•
•
•
CAPACITORS:
uF: µF
RESISTORS
All resistors are in ohms.
METAL: metal-film resistor
METAL OXIDE: Metal Oxide-film resistor
F: nonflammable
COILS
uH: µH
Abbreviation
FR : French
EE : East European
Description
Remarks
A-3021-172-A MAIN BOARD, COMPLETE (AEP,UK,EE)
********************
A-3021-173-A MAIN BOARD, COMPLETE (FR)
*********************
Ref. No.
•
SEMICONDUCTORS
In each case, u: µ, for example:
uA...: µA... , uPA... , µPA... ,
uPB... , µPB... , uPC... , µPC... ,
uPD..., µPD...
When indicating parts by reference number,
please include the board name.
The components identified by mark ! or
dotted line with mark ! are critical for safety.
Replace only with part number specified.
Part No.
Description
C323
C601
C602
C603
C604
1-115-412-11
1-125-837-91
1-107-826-91
1-115-467-11
1-164-156-11
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
680PF
1uF
0.1uF
0.22uF
0.1uF
5%
10%
10%
10%
25V
6.3V
16V
10V
25V
Remarks
C605
C606
C607
C608
C609
1-107-826-91
1-162-970-11
1-162-970-11
1-162-970-11
1-135-151-21
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
TANTALUM CHIP
0.1uF
0.01uF
0.01uF
0.01uF
4.7uF
10%
10%
10%
10%
20%
16V
25V
25V
25V
4V
C701
C702
C703
C704
C705
1-119-750-11
1-104-851-11
1-162-915-11
1-107-826-91
1-115-156-11
TANTAL. CHIP
TANTAL. CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
22uF
10uF
10PF
0.1uF
1uF
20%
20%
0.5PF
10%
6.3V
10V
50V
16V
10V
C706
C707
C708
C709
C710
1-115-156-11
1-115-156-11
1-115-156-11
1-115-156-11
1-115-156-11
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
1uF
1uF
1uF
1uF
1uF
10V
10V
10V
10V
10V
C711
C712
1-115-156-11 CERAMIC CHIP
1-115-156-11 CERAMIC CHIP
1uF
1uF
10V
10V
< CAPACITOR >
C101
C102
C103
C104
C105
1-107-520-11
1-115-156-11
1-115-156-11
1-115-156-11
1-113-619-11
TANTAL. CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
33uF
1uF
1uF
1uF
0.47uF
20%
C106
C107
C108
C109
C201
1-115-467-11
1-164-505-11
1-164-227-11
1-164-677-11
1-107-520-11
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
TANTAL. CHIP
0.22uF
2.2uF
0.022uF
0.033uF
33uF
10%
C202
C203
C204
C205
C206
1-115-156-11
1-115-156-11
1-115-156-11
1-113-619-11
1-115-467-11
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
1uF
1uF
1uF
0.47uF
0.22uF
C207
C208
C209
C301
C302
1-164-505-11
1-164-227-11
1-164-677-11
1-119-663-11
1-164-156-11
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
TANTAL. CHIP
CERAMIC CHIP
2.2uF
0.022uF
0.033uF
47uF
0.1uF
C303
C304
C305
C306
C307
1-117-181-11
1-115-156-11
1-126-236-11
1-109-935-11
1-115-467-11
TANTAL. CHIP
CERAMIC CHIP
ELECT
TANTAL. CHIP
CERAMIC CHIP
4.7uF
1uF
330uF
4.7uF
0.22uF
C308
C309
C310
C311
C312
1-165-112-11
1-115-467-11
1-135-149-21
1-164-156-11
1-115-156-11
CERAMIC CHIP
CERAMIC CHIP
TANTALUM CHIP
CERAMIC CHIP
CERAMIC CHIP
0.33uF
0.22uF
2.2uF
0.1uF
1uF
C313
C314
C315
C316
C317
1-109-935-11
1-135-187-21
1-135-187-21
1-125-837-91
1-162-964-11
TANTAL. CHIP
TANTAL. CHIP
TANTAL. CHIP
CERAMIC CHIP
CERAMIC CHIP
4.7uF
2.2uF
2.2uF
1uF
0.001uF
20%
20%
20%
10%
10%
4V
4V
4V
6.3V
50V
C318
C319
C320
C321
C322
1-135-201-11
1-164-156-11
1-162-968-11
1-115-416-11
1-109-937-11
TANTALUM CHIP
CERAMIC CHIP
CERAMIC CHIP
CERAMIC CHIP
TANTAL. CHIP
10uF
0.1uF
0.0047uF
1000PF
6.8uF
20%
4V
25V
50V
25V
2.5V
10%
2.5V
10V
10V
10V
6.3V
10%
10%
20%
10V
16V
25V
16V
2.5V
10%
10%
10V
10V
10V
6.3V
10V
10%
10%
20%
20%
20%
20%
10%
10%
20%
16V
25V
16V
2.5V
25V
2.5V
10V
2V
4V
10V
16V
10V
10V
25V
10V
< CONPOSITION CIRCUIT BLOCK >
CB301
CB303
1-127-575-21 CERAMIC CHIP
1-127-576-21 CERAMIC CHIP
470PF
22000PF
0
0
< DIODE >
D701
D702
D703
D709
D710
8-719-404-50
8-719-072-70
8-719-067-79
8-719-068-83
8-719-422-58
DIODE MA111-TX
DIODE MA2ZD14001S0
LED CL-170HR-CD-T-AB (BATT)
DIODE MAZL068D0LS0-TX/L
DIODE MA8062
D711
8-719-422-58 DIODE MA8062
< FERRITE BEAD >
10%
5%
20%
FB101
FB201
1-469-125-21 FERRITE
1-469-125-21 FERRITE
0uH (AEP,UK,EE)
0uH (AEP,UK,EE)
< IC >
IC301
IC302
IC601
IC701
IC702
8-759-549-78
8-759-488-80
8-759-356-46
8-759-580-19
8-759-566-77
IC703
IC704
8-759-430-08 IC PST9008NL
8-759-280-84 IC S-81211SG-QA-T1
— 26 —
IC TA2123F(EL)
IC NJM2185AV-TE2
IC MM1279XVBE
IC ML63512-119TBZ060
IC XC6371C251PL
50V
50V
MAIN
Ref. No.
Part No.
Description
Remarks
< JACK >
J301
Ref. No.
Part No.
Description
Remarks
R211
R212
1-216-827-11 METAL CHIP
1-216-809-11 METAL CHIP
3.3K
100
R212
1-216-825-11 METAL CHIP
2.2K
R213
R250
1-216-853-11 METAL CHIP
1-216-813-11 METAL CHIP
470K
220
R301
R302
R303
R304
R305
1-218-887-11
1-216-849-11
1-216-833-11
1-216-835-11
1-216-837-11
RES,CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
47K
220K
10K
15K
22K
0.50%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R306
R307
R308
R309
R601
1-216-793-11
1-216-825-11
1-216-851-11
1-218-899-11
1-216-837-11
RES,CHIP
METAL CHIP
METAL CHIP
RES,CHIP
METAL CHIP
4.7
2.2K
330K
150K
22K
5%
5%
5%
0.50%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R602
R603
R604
R701
R702
1-216-809-11
1-216-829-11
1-216-823-11
1-216-823-11
1-216-855-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
100
4.7K
1.5K
1.5K
680K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R703
R704
R705
R706
R707
1-216-853-11
1-218-911-11
1-218-911-11
1-218-911-11
1-218-915-11
METAL CHIP
RES,CHIP
RES,CHIP
RES,CHIP
RES,CHIP
470K
470K
470K
470K
680K
5%
0.50%
0.50%
0.50%
0.50%
1/16W
1/16W
1/16W
1/16W
1/16W
R708
R709
R710
R711
R712
1-218-903-11
1-218-895-11
1-216-853-11
1-216-853-11
1-216-853-11
RES,CHIP
RES,CHIP
METAL CHIP
METAL CHIP
METAL CHIP
220K
100K
470K
470K
470K
0.50%
0.50%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R713
R714
R715
R717
R718
1-216-841-11
1-216-803-11
1-216-827-11
1-216-821-11
1-216-821-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
47K
33
3.3K
1K
1K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R719
R720
R721
R722
R723
1-216-809-11
1-218-871-11
1-218-839-11
1-218-855-11
1-218-851-11
METAL CHIP
RES,CHIP
RES,CHIP
RES,CHIP
RES,CHIP
100
10K
470
2.2K
1.5K
5%
0.50%
0.50%
0.50%
0.50%
1/16W
1/16W
1/16W
1/16W
1/16W
R724
R726
R731
R732
R733
1-218-875-11
1-216-821-11
1-216-833-11
1-216-847-11
1-218-895-11
RES,CHIP
METAL CHIP
METAL CHIP
METAL CHIP
RES,CHIP
15K
1K
10K
150K
100K
0.50%
5%
5%
5%
0.50%
1/16W
1/16W
1/16W
1/16W
1/16W
R734
R735
R736
R738
R739
1-218-851-11
1-218-871-11
1-218-867-11
1-218-895-11
1-218-911-11
RES,CHIP
RES,CHIP
RES,CHIP
RES,CHIP
RES,CHIP
1.5K
10K
6.8K
100K
470K
0.50%
0.50%
0.50%
0.50%
0.50%
1/16W
1/16W
1/16W
1/16W
1/16W
1-779-867-81 JACK (2 REMOTE)
<JUMPER CHIP>
JC114
JC214
1-216-864-11 METAL CHIP
1-216-864-11 METAL CHIP
0
0
5%
5%
1/16W
1/16W
< COIL >
L701
1-412-032-11 INDUCTOR CHIP 100uH
< PHOTO INTERUPTER >
PH701
8-749-014-43 PHOTO PR-20-T
< TRANSISTOR >
Q301
Q302
Q303
Q304
Q305
8-729-800-71
8-729-423-75
8-729-423-75
8-729-421-23
8-729-422-18
TRANSISTOR 2SB815B7-TB
TRANSISTOR XN1116
TRANSISTOR XN1116
TRANSISTOR XN1216
TRANSISTOR XN4315
Q601
Q602
Q603
Q604
Q701
8-729-403-42
8-729-402-84
8-729-420-50
8-729-420-50
8-729-230-72
TRANSISTOR XN1401
TRANSISTOR XN4601
TRANSISTOR UN5215
TRANSISTOR UN5215
TRANSISTOR 2SA1362YG
Q702
8-729-420-50 TRANSISTOR UN5215
< RESISTOR >
R101
R102
R103
R104
R105
1-216-849-11
1-216-839-11
1-216-811-11
1-216-831-11
1-216-823-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
220K
33K
150
6.8K
1.5K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R106
R107
R108
R109
R110
1-216-825-11
1-216-837-11
1-216-789-11
1-216-821-11
1-216-837-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
2.2K
22K
2.2
1K
22K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R111
R112
1-216-827-11 METAL CHIP
1-216-809-11 METAL CHIP
3.3K
100
5%
5%
R112
1-216-825-11 METAL CHIP
2.2K
R113
R150
1-216-853-11 METAL CHIP
1-216-813-11 METAL CHIP
470K
220
R201
R202
R203
R204
R205
1-216-849-11
1-216-839-11
1-216-811-11
1-216-831-11
1-216-823-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
220K
33K
150
6.8K
1.5K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
R206
R207
R208
R209
R210
1-216-825-11
1-216-837-11
1-216-789-11
1-216-821-11
1-216-837-11
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
METAL CHIP
2.2K
22K
2.2
1K
22K
5%
5%
5%
5%
5%
1/16W
1/16W
1/16W
1/16W
1/16W
1/16W
1/16W
(AEP,UK,EE)
5%
1/16W
(FR)
5%
1/16W
5%
1/16W
(FR)
5%
5%
1/16W
1/16W
(AEP,UK,EE)
5%
1/16W
(FR)
5%
1/16W
5%
1/16W
(FR)
< CONPOSITION CIRCUIT BLOCK >
RB601
RB602
— 27 —
1-234-243-21 RES, NETWORK 220K (3216)
1-234-200-21 RES, NETWORK 100 (3216)
WM-EX678
MAIN
Ref. No.
Part No.
Description
Remarks
Ref. No.
Part No.
Description
< VARIABLE RESISTOR >
RV301
RV601
1-225-684-21 RES, VAR, CARBON 30K/30K (VOL)
1-225-254-21 RES, ADJ, CARBON 2.2K (TAPE SPEED)
!
< SWITCH >
!
S701
S702
S703
S704
S705
1-771-475-21
1-771-053-21
1-771-053-21
1-771-053-21
1-771-053-21
S707
1-572-922-11 SWITCH, SLIDE (HOLD)
Remarks
ACCESSORIES
***********
SWITCH, SLIDE (DIRECTION)
SWITCH, KEY BOARD (p)
SWITCH, KEY BOARD (9(REPEAT)
SWITCH, KEY BOARD (FF)
SWITCH, KEY BOARD (REW)
1-418-021-11
1-528-252-21
1-528-543-22
1-528-744-23
1-759-700-21
REMOTE CONTROL UNIT (RM-WME21)
BATTERY CHARGER (BC-7S)(UK)
BATTERY, NI-CD (NC-6WM)
BATTERY CHARGER (BC-7DY)(AEP,FR,EE)
CASE, BATTERY
3-008-521-01
3-029-488-01
3-864-887-11
3-864-887-21
CASE, BATTERY CHARGE
POUCH, CARRYING
MANUAL, INSTRUCTION (ENGLISH/FRENCH)
MANUAL, INSTRUCTION (GERMAN/DUTCH)
(AEP)
3-864-887-31 MANUAL, INSTRUCTION (SWEDISH/ITALIAN)
(AEP)
< THERMISTOR >
THP601 1-810-794-11 THERMISTOR, POSITIVE 3.3K
< VIBRATOR >
X701
1-579-258-11 VIBRATOR, CRYSTAL (32.768kHz)
************************************************************
3-864-887-41 MANUAL, INSTRUCTION
(SPANISH/PORTUGUESE) (AEP)
3-864-887-51 MANUAL, INSTRUCTION (FINNISH/RUSSIAN)
(AEP,EE)
3-864-887-61 MANUAL, INSTRUCTION (POLISH/CZECH) (EE)
8-953-272-90 HEADPHONE MDR-ED136SP//K SET
MISCELLANEOUS
**************
The components identified by mark ! or dotted
line with mark ! are critical for safety.
Replace only with part number specified.
S901
1-762-553-11 SWITCH, LEAF
HP901 1-500-576-11 HEAD, MAGNETIC (PLAYBACK)
M901
1-763-166-11 MOTOR (CAPSTAN/REEL) (WITH PULLEY)
PM901 1-454-674-32 SOLENOID, PLUNGER
************************************************************
Sony Corporation
9-926-931-11
Personal A&V Products Company
— 28 —
99A1651-1
Printed in Singapore © 1999.1
Published by Quality Engineering Dept.
(Shibaura)