Sony Walkman WM-EX20 User manual

WM-EX20
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
Tourist Model
SERVICE MANUAL
CASSETTE PLAYER
MICROFILM
SPECIFICATIONS
Model Name Using Similar Mechanism NEW
Tape Transport Mechanism Type MT-WMEX20-162
Manufactured under license from Dolby Laboratories
Licensing Corporation.
“DOLBY” and the double-D symbol aare trademarks
of Dolby Laboratories Licensing Corporation.
Tape section
Frequency response
(Dolby NR off) Playback: 30 – 18,000 Hz
Output Headphones (REMOTE 2jack)
Load impedance 8 – 300 Ω
General
Power requirements 1.5 V
One rechargeable battery or
one R6 (size AA) battery
Dimensions (w/h/d) Approx. 78.7 ×108.6 ×18.7 mm
(31/8×43/8×3/4 inches), incl.
projecting parts and controls
Mass Approx. 180 g (6.4 oz)
Approx. 240 g (8.5 oz) (incl.
rechargeable battery and a cassette)
Supplied accessories Battery case (1)
Stereo earphones with remote control (1)
Battery charger (1)
US, CND model : BC-7DC
AEP, FR model : BC-7DY
E, JE model : BC-7HT
UK model : BC-7S
AUS model : BC-7SG
KR model : BC-9HR
Rechargeable battery (1)
US, CND, AEP, UK, FR, AUS model :
NC-6WM, 1.2V, 600mAh, Ni-Cd
KR, E, JE model:
NH-14WM, 1.2V, 1400mAh, Ni-MH
Rechargeable battery carrying case (1)
Carrying pouch (1)
E, JE, model:
AC plug adaptor (1)
Design and specifications are subject to change without notice
• Abbreviation
CND : Canadian model
FR : French model
AUS : Australian model
KR : Korea model
JE : Tourist model
Ver 1.0 1999. 08

— 2 —
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.
TABLE OF CONTENTS
1. GENERAL ·········································································· 2
2. SERVICE NOTE ······························································· 3
3. DISASSEMBLY
3-1. Lid Assy, Cassette ··························································· 5
3-2. Case················································································· 5
3-3. Ornament (Open) Block Assy ········································· 6
3-4. “Sub Board”, “Switch, Leaf”, “Main Board” ················· 6
3-5. Belt (F KAI), Motor (M601)··········································· 7
3-6. Holder Assy····································································· 7
3-7. Pinch Lever (N)/(R) Assy ··············································· 8
3-8. Magnetic Head (HP701) ················································· 8
4. MECHANICAL ADJUSTMENT ·································· 9
5. ELECTRICAL ADJUSTMENT ···································· 9
6. DIAGRAMS
6-1. Block Diagram ······························································ 10
6-2. Printed Wiring Board ···················································· 12
6-3. Schematic Diagram (1/2) ·············································· 15
6-4. Schematic Diagra (2/2) ················································· 18
6-5. IC Block Diagrams ······················································· 21
6-6. IC Pin Function Discription ·········································· 23
7. EXPLODED VIEWS
7-1. Cabinet Block, Main Board ·········································· 25
7-2. Mechanism Deck Block ················································ 26
8. ELECTRICAL PARTS LIST ······································· 27
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK !OR DOTTED LINEWITH
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.
SECTION 1
GENERAL
1∑VOL knob
22REMOTE jack
3Operation button
4HOLD/OPERATION knob
5OPEN knob
6Dry battery case contact
7Rechargeable battery compartment
8Headphones plug
9DISPLAY window
0SOUND button
!¡ MODE button
!™ HOLD button
!£ 9((PLAY), p(STOP), button
!¢ FF button
!∞ REW button
!§ VOL knob
This section is extracted
from instruction manual.
ATTENTION AU COMPOSANT AYANT RAPPORT
À LA SÉCURITÉ!
LES COMPOSANTS IDENTIFÉS PAR UNE MARQUE !SUR LES
DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT
CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE
REMPLACER CES COMPOSANTS QUE PAR DES PIÈSES SONY
DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU
DANS LES SUPPÉMENTS PUBLIÉS PAR SONY.

— 3 —
(S702)
FWD
← CNT → REV
Battery terminal
’
Battery terminal ‘
Square wave
(sine wave)
10 Hz, -3.5 dBs
jumper
GND
S PH IN(S)(TP36)
T PH IN(S)(TP37)
AF OSC
Plunger (PM701)
ATS
SWITCH
(S704-2)
BP1
TAPE IN
SWITCH
(S704-1)
M601
M
SECTION 2
SERVICE NOTE
[Service Mode]
The service mode enables to operate the mechanism of WM-EX20
while the MAIN board is opened.
Rotation of the idler gear (A) (S side) is detected using the photo-
reflector (PH702) in theWM-EX20. PH702 is located ontheMAIN
board, therefore the rotation of the idler gear (A) (S side) cannot be
detected by PH702 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.
1. Setting
1) Removethe cabinetsreferringto section “3. DISASSEMBLY”.
Open the MAIN board.
2) Connect the motor (M601) and the plunger solenoid (PM701)
tothe MAIN board usingthejumper wires. When theextension
jig (1-769-143-11) (10 wires as a set) is used, they can be
connected easily.
3) ShorttheTAPE IN switch land (BP1)with solder.Input asquare
(or sine) wave of 10 Hz (at 1.3 Vp-p) to both PH IN T land
(TP37) and PH IN S land (TP36) with jumper wire.
4) Connect DC 1.3V from external regulated power supply to ‘
and ’terminals of the battery.
2. PRE-SET status
The set must be in this state before the PLAY, FF and REW modes
can be entered.
1) Make sure that the slider (F/R) is in the center position and that
the F/R switch (S702) is in the center position. Make sure that
the reel gear does not rotate by rotating the flywheel on the F
side clockwise. If improper, place the set in the preset state
according to the following instructions:
2) Repeat the step below some times to ensure the above
conditions.
* Pull away the trigger level from the plunger with tweezers or
other means. Then rotate the flywheel on the F side clockwise.
3) Turn the stabilized power supply OFF once and then ON.
3. FF, REW modes
1) Check for “2. Preset state” and push the FF switch and the
REW switch.
2) Move the F/R switch (S702) to the movement of the slider to
enter the FF/REW mode.
4. PLAY mode
1) Check for “2. Preset state”.
2) Push the 9( switch on the remote commander to move the
lever (SW) toward the R side. With timing to this, move the F/
R switch (S702) to enter the PLAY (R side) mode.
Note 1: If failed, retry from the preset state.
Note 2: The 9(, p, FF, and REW switches on the remote
commander should be used whenever possible.
– MAIN BOARD (SIDE B) —

— 4 —
[ Slider (NR) ]
[ Rotational system ]
1. Rotational System of PLAY Mode 2. Rotational System of FF Mode
3. Rotational System of REW Mode
F side
flywheel
slider (NR)
F side center R side
motor pulle
y
reverse pulley
insert flywheel (R)
insert flywheel (N)
gear (reel) (T side) gear (reel) (S side)
idler gear (A) (T side)
idler gear (A) (S side)
idler gear (B)
gear (Y)
gear (NR)
FWD REV
clutch
assy (F)
motor pulle
y
gear (FR)
reverse pulley
insert flywheel (R)
insert flywheel (N)
gear (reel) (T side)
idler gear (A) (T side)
gear (Y) clutch
assy (F)
motor pulle
y
gear (FR) gear (reel) (S side)
reverse pulley
insert flywheel (R)
insert flywheel (N)
idler gear (A) (S side)
gear (Y) clutch
assy (F)

— 5 —
SECTION 3
DISASSEMBLY
Lid Assy, Cassette Case Ornament (OPEN)
Block Assy "Sub Board", "Switch, Leaf",
"Main Board" Belt (F1), Motor (M601)
Set
Holder Assy Pinch Lever (N)/(R) Assy Magnetic Head (HP701)
Note : Follow the disassembly procedure in the numerical order given.
• The equipment can be removed using the following procedure.
3-1. LID ASSY, CASSETTE
3-2. CASE
1 Two screws (M1.4 × 2.2)
Lid assy, cassette
3
2
Screw (M1.4 × 2.2)
4
Mechanism deck block
3 Two screws (M1.4 × 2.2)
4 Screw (M1.4 × 1.6)
5
2
Two screws (M1.4 × 2.2)
Case
1 Lid, battery case

— 6 —
3-3. ORNAMENT (OPEN) BLOCK ASSY
3-4.“SUB BOARD”,“SWITCH, LEAF”,“MAIN BOARD”
Mechanism deck block
Ornament (open) block assy
2
1
Release the two claw
s
from the two holes
in the direction allow
Claw
Hole
Hole
Claw
3 Screw (M1.4 × 1.4)
5 Screw (M1.4)
6 SUB board
2 Screw (M1.4)
qd MAIN board
1 Screw
4 Unsolder the 6 places.
qa Unsolder the motor.
9 Unsolder the
plunger.
0 Unsolder the
flexible board.
qs Claw
7 Screw (M1.4)
8 Switch leaf

— 7 —
2 Two screws (M1.4)
4 Motor (M601)
3 Retainer (F1) moto
r
1 Belt (F KAI)
Belt (F KAI)
3-5. BELT (F KAI), MOTOR (M601)
3-6. HOLDER ASSY
4 Screw (M1.4)
2 Shaft
6 Shaft
1 Two screws (M1.4 × 1.4)
3 Lock lever (B)
0 Remove the holder
assy in the directio
n
of the arrow.
8 Remove soldering
from Head flexible board.
5 Lock lever (S)
9 Head flexible
board
7 Bracket (casette) assy

— 8 —
3-7. PINCH LEVER (N)/(R) ASSY
3-8. MAGNETIC HEAD (HP701)
Claw
Claw
2 Remove the pinch lever
(N) assy in the direction
of the arrow.
Note: Be careful of the claw
1 Remove the pinch lever
(R) assy in the direction
of the arrow.
Note: Be careful of the claw
1 Remove the magnetic head (HP701)
in the direction of the arrow.

WM-EX20
— 9 — — 10 — — 11 —
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM
SECTION 4
MECHANICAL ADJUSTMENTS
PRECAUTION
1. Clean the following parts with a denatured-alcohol-moistened
swab :
playback head pinch roller
capstan rubber belt
2. Demagnetize the playback head with a head demagnetizer.
3. Do not use a magnetized screwdriver for the adjustments.
4. After the adjustments, apply suitable locking compound to the
parts adjusted.
5. The adjustments should be performed with the rated power
supply voltage (1.3 V) unless otherwise noted.
Torque Measurement
SECTION 5
ELECTRICAL ADJUSTMENT
PRECAUTION
• Supplied voltage : 1.3V
• Switch and control position
VOL switch : NORM
• Remote control position
HOLD switch : OFF
VOL control : MAX
SOUND mode : NORM
DOLBY mode : OFF
Test tape
Tape Speed Adjustment
Procedure :
1. PlaybackWS-48A(tapecenter part) in the REV state and adjust
RV601 so that the frequency counter reading becomes
3,000 Hz.
Specification Value :
2. Playback WS-48A (tape counter part) in the FWD state.
Check thatfrequencycounter reading is within 2.5% of reading
of step 1.
Adjustment Location :
Digital frequency counter
2,985 to 3,015 Hz
Type
WS-48A Signal 3 kHz, 0 dB Used for tape speed adjustment
Mode Torque Meter Meter Reading
15 – 25 g • cm
FWD CQ-102C (0.21 – 0.35 oz • inch)
FWD less than 2 g • cm
back tension (less than 0.03 oz • inch)
15 – 25 g • cm
REV CQ-102RC (0.21 – 0.35 oz • inch)
REV less than 2 g • cm
back tension (less than 0.03 oz • inch)
more than 50 g • cm
FF, REW CQ-201B (more than 0.69 oz • inch)
i
test tape
WS-48A
(3 kHz, 0 dB)
set
REMOTE jack (J301)
32
Ω
frequency counter
RV601
AMS IN
DOLBY CTL
BOOST CTL
F/R CTL
SURRUND CTL
HI UP CTL
XO
XI
CASSETE SW
M/N CTL
PHOTO (T) CTL
PHOTO (T) IN
40
BEEP
47
16 24
14
RV CTL 15
55
30
5
8
48
33
22
43
PHOTO (S) IN
42
PHOTO (S) CTL
20
SPEED DTL
35
MOTOR START
34
MOTOR U
26 MOTOR V
27 MOTOR W
29 CTRL 1
54 CTRL 2
53 MOTOR DIR
36
X701
4kHz
MUTE CTL
31
PSIG
CONTROL
Q604
SURROUND
SWITCH
Q304
SURROUND
SWITCH
Q306
PLUNGER
DRIVER
Q701,704
RESET
IC705
REVIVE
CONTROL
Q302
REVIVE
CONTROL
Q303
HI UP
CONTROL
Q301
RIPPLE
FILTER
RIPPLE
FILTER
Q305
VOL MAX
SWITCH
Q307
DOLBY
SWITCH
Q312
REMOTE
SWITCH
Q708
VOL MIN
SWITCH
Q308,310
METAL
SWITCH
Q313(1/2)
T REEL
SENS
PH701
MOTOR
SW
Q601
-1
(TAPE IN)
-2
(ATS)
12
10
41 39 4042434446
S REEL
SENS
PH702
1/2 SPEED
SWITCH
Q602
INV.
Q705,706
MOTOR
START SWITCH
Q603
RV601
TAPE
SPEED
21
30
29
28
S704
P SIG IN 1
50 P SIG IN 2
51
POWER CTL
23
16
17
15
1
36
35 4
5
6
7
8
9
10
31
32
34
19
2
MOTOR SERVO
IC601
9
11
13
2
4
6
8
7
10
12
1
3
5
MOTOR
DRIVE
Q605
8
1
2
SWITCH
MTL DRV
BEEP
BEEP
M/N SW F/R SW BST SW PW SW MT SW
AMS
IN
PRE OUT R
PRE OUT L
PRE NF L
PRE NF R
+
–
+
–
7
6
5
4
3
AUDIO AMP
IC301 (1/2)
VREF
FWD L
FWD R
REV L
REV R
L
R
L
R
REF V
ICI1
VI1
VI2
IV
U IN
V IN
W IN
CTRL 1
CTRL 2
DIR
PSIG
UT
VT
WT
UT
VT
WT
WS
VS
US
TU
TW
TV
TU
TW
TV
W
V
U
W
V
U
C
16
WS
VS
US
W OUT
V OUT
U OUT
MCENTER
MC
B+
(+1.5V)
SYSTEM
CONTROL
IC702
41
37
PM CTL
RMUM
DATA OUT
19
RST 2 1 3
A/B SW 46
MD SW 60
WAKE UP 58
BATT DET 2 62
B+
(+2.0V)
9
SURROUND AMP
IC302
VCC B+
(+2.0V)
SWITCH
Q309
B+
(+2.0V)
S301
VOLUME
MIN
NORM
MAX PW IN C
PW IN R
PW IN L
PW NF R
PW NF L
26
32
27
28
21
35
22
20
+
–
+
–
METAL
SWITCH
Q313(2/2)
+
–
PW OUT L
PW OUT R
33
34
17 18BASE
RF OUT
PW OUT C
AGC IN
AGC
DET
AUDIO AMP
IC301 (2/2)
B+ (+1.5V)
B+
(+1.5V)
VCC POWER
SWITCH
IC707
S702
FWD
CNT
REV
S701
(A/B)
KEY IN 63
BATT DET 1 61
S703
OPERATION
1
2
3
4
7
1 3
8
OUT1
OUT2
OUT3
OUT4
CE
VCC
VOLTAGE DETECT
IC703
VOLTAGE DETECT
IC704
LX
V OUT
B+
(+1.5V)
B+
(+1.5V)
B+
(+1.5V)
3
2
DC/DC CONVERTER
IC701
B+
(+1.5V)
B+
(+2.0V)
RECHAGEABLE
BATTERY
NH-14WM(1.2V 1400mA)
:E,JE,KR MODEL
NC-6WM(1.2V 600mA)
:US,CND,AUS,AEP,UK,
FR MODEL AEP,UK,FRMODEL US,CND,AUS,E,JE,KR MODEL
• Abbreviation
CND : Canadian model
AUS : Austratian model
FR : French model
KR : Korean model
JE : Tourist model
DC IN 1.5V
BATTERY CASE
BATTERY CASE
DRY BATTERY
SIDE "AA"
(IEC DESIGNATION R6)
1PC, 1.5V
DRY BATTERY
SIDE "AA"
(IEC DESIGNATION R6)
1PC, 1.5V
GND
REMO
DATA
VCC
J301
REMOTE
CAPSTAN
/REEL
MOTOR
M601
HP701
(PLAYBACK)
L CH
R CH
FWD
L CH
R CH
REV
INV.
Q705,706
• Signal path
: PB
B+ (+1.5V)
PW
OUT IN
D702
L702 ++ +
F701
0.25A
W701
W702
PM701
PLUNGER
16
1
10
7
DOLBY
SWITCH
Q311
DOLBY AMP
IC303
VCC
11
14
4
+
10
5
15 14
11
AMS OUT
AMS DET
PW
Q314
INV.
29
SUB BOARD

WM-EX20
— 12 — — 13 — — 14 —
6-2. PRINTEDWIRING BOARD
Note on PrintedWiring Board:
•Y: parts extracted from the conductor side.
•z:Through hole.
•b: Pattern from the side which enables seeing.
Caution:
Pattern face side: Partson thepattern face side seen from
(Side A) the pattern face are indicated.
Parts face side: Parts on the parts face side seen from
(Side B) the parts face are indicated.
-2
-2
-2
-1
-1
-1
123
654
123
654
123 654
123 654
123
654
123
654
123
654
1-674-822- 11
(11)
11
(11)
11
(11)
11
(11)
1-674-822-
1-674-823- 1-674-823-
PH701
(T REEL)
PH702
(S REEL)
-1 -2
S701
(A/B)
TAPE SPEED
REV CNT FWD
Q605
MAIN BOARD (SIDE A)
SUB BOARD
(SIDE B)
SUB BOARD
(SIDE A)
MAIN
BOARD
(SIDE B)
S301
VOLUME
J301
REMOTE
MIN
NORM
MAX
S704-1
TAPE IN
SWITCH
S704-2
ATS
SWITCH
PM701
(PLUNGER)
VUW
TV
TW
C
TU
L CH
L CH
FLEXIBLE BOARD
R CH
R CH
HP701 (PLAYBACK )
REV
FWD
EXCEPT
FR MODEL
FR MODEL
+
+
+
DC IN 1.5V
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
1PCS, 1.5V
BATTERY
CASE
BATTERY
CASE
AEP,UK,FR MODEL
DRY BATTERY
SIZE "AA"
(IEC DESIGNATION R6)
1PCS, 1.5V
US,CND,E,JE,KR,AUS
MODEL
RECHAGEABLE BATTERY
NH-14WM (1.2V 1400mA)
:E,JE,KR MOSEL
NH-6WM (1.2V 600mA)
:US,CND,AEP,UK,FR,AUS
MODEL
12
A
B
C
D
E
F
G
3456789101112131415
16
M601
CAPSTAN/REEL
MOTOR
Ref. No. Location
D701 B-5
D702 B-5
D703 B-6
IC301 E-6
IC302 C-7
IC303 D-5
IC601 D-2
IC701 B-5
IC702 D-11
IC703 B-5
IC704 B-6
IC705 B-5
Q301 D-6
Q302 D-6
Q303 D-7
Q304 C-6
Q305 E-7
Q306 D-6
Q307 C-5
Q308 C-5
Q309 C-6
Q310 C-6
Q311 C-5
Q312 C-4
Q313 F-6
Q314 E-9
Q601 C-1
Q602 C-13
Q603 C-3
Q604 C-12
Q605 D-2
Q701 B-6
Q704 B-6
Q705 C-4
Q706 C-4
Q707 E-4
Q708 C-4
• Semiconductor
Location
• Abbreviation
CND : Canadian model
AUS : Austrarian model
FR : French model
KR : Korean model
JE : Tourist model

WM-EX20
— 15 — — 16 — — 17 —
6-3. SCHEMATIC DIAGRAM MAIN (1/2) SECTION
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.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PLAY
• Voltages are taken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E: PB
• Abbreviation
CND : Canadian model.
AUS : Australian model.
JE : Tourist model.
FR : French model.
KR : Korea model.
• Refer to page 21, 22 for IC Block Diagrams.
0.1
1 IC601 456
0.5V/div
2µsec/div
2 IC601 0
0.5V/div
1µsec/div
444 Hz
150 Hz
5 Q605 80!™
0.5V/div
5µsec/div
150 Hz
3 IC601 @•@ª#º
0.2V/div
5µsec/div
150 Hz
150 Hz
4 Q605 135
0.5V/div
5µsec/div
•Waveform

WM-EX20
— 18 — — 19 — — 20 —
6-4. SCHEMATIC DIAGRAM MAIN (2/2) SECTION
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.
• All resistors are in Ωand 1/4W or less unless otherwise
specified.
•f: internal component.
•C: panel designation.
•U: B+ Line.
•H: adjustment for repair.
• Powervoltage is dc 1.5V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark: PLAY
• Voltages are taken with aVOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
• Circled numbers refer to waveforms.
• Abbreviation
CND : Canadian model.
AUS : Australian model.
JE : Tourist model.
FR : French model.
KR : Korea model.
• Refer to page 21, 22 for IC Block Diagrams. • Refer to page 23, 24 for IC Pin Function Description.
•Waveform
1.3
1.3
0
0.7
0.6
S702
6 IC701 3
1V/div
5µsec/div
100 kHz
7 IC702 8
1V/div
0.2µsec/div
4 MHz

— 21 — — 22 —
6-5. IC BLOCK DIAGRAMS
IC301 TA2123AF
+
–
+
–
AGC
DET
BST
PWC
PWB
+
–
PWA
+
–
+ –
+ –
+ –
TOMP
RIPPLE
FILTER
MIX
MTL DRV
VREF
PREA PREB
BEEP
SW
36 35 34 33 32 31 30 29 28 27 26 25
24
22
21
20
19
18
17
16
15
14
13
23
12111098765321 4
48
47
46
45
44
43
42
41
40
39
38
37
AGC DET AGC IN BST NF BST OUT PW IN C LPF EQ L PW NF L PW IN L PW IN R PW NF R EQ R
RF IN
PW GND
PW OUT R
PW OUT C
PW OUT L
VCC
BASE
RF OUT
GND
AMS DET
AMS MIX
AMS IN
VREF IN
PRE GND
M/N SW
PRE SW
F/R SW
BST SW
PW SW
NT SW
AMS OUT
BEEP
MT TC
CAMP SW
AMS IN
PRE NF-R
PRE OUT-R
MTL DRV-R
MTL DRV-L
PRE OUT-L
PRE NF-L
REV IN-L
REV IN-R
REF OUT
FWD IN-R
FWD IN-L
IC701 XC6372A211PR
+
–
+
–
BIAS
CIRCUIT
WEIGHT
G2 G1 V/I
ACH BLOCK
GM
SUN
BCH BLOCK (SAME ACH)
14 13 12 11 10 9 8
1 2 3 4 5 6 7
GND IREF VREF INB OUT B DC B DET B
Vcc SW VEXT IN A OUT A DC A DET A
IC601 LB1994M
DECODER
CTRL
BLOCK
POWER
D/DT PULSE
BUFFER
COMPARATORBUFFERVI
COMPARATOR
SOFT CLIP
CURRENT
AMP
P-SIG
PW•SW
4 5 61 2 97 8
14
15
16
17
18
19
20212224 23252627
30
29
28
36
35
34
33
32
31
WS MC
U IN
3
VCC
V IN
W IN
CTRL1 CTRL2
DIR
VS
US
U OUT
NC
V OUT
W OUT
WT
VT
UT
PGND FC CT2 CT1 IR ICI2 ICI1 I SOFT
M CENTER
GND
VI2
VI1
IV
VC
13 PW
12 CI
11 Vref
10 P SIG
IC703 MM1305BWBE
+
–
+
–
+
–
+
–
1
2
3
4
8
7
6
5
VCC
CE
RIPPLE
GND
OUT 1
OUT 2
OUT 3
OUT 4
IC303 NJM2185AV
IC302 NJM2190V
9
Lin
VREF C3
GND
C4
MODE
Rout REFin
Wout
C2
V+/2 V+
Lout
C1
Win
Rin
10111213141516
1 52 3 4 6 7 8
–
+EXT
FILTER
MATRIX
MODE
CONTROL
BIAS
BYPASS
BYPASS
SRS
SRS
3
1
BUFFER
PWM/PFM CONTROL
OSC 50/100/180 kHz
VLx LIMITER
PHASE COMP
V REF
SLOW START
2
Lx
Vss
V OUT

— 23 — — 24 —
6-6. IC PIN FUNCTION DESCRIPTION
• IC702 MB89135LPFV (SYSTEM CONTROL)
Pin No.
51
52
53
54
55
56
57
58
59
60
61
62
63
64
I/O
I
I
O
O
O
–
–
–
I
I(A/D)
I(A/D)
I(A/D)
I(A/D)
–
Description
Motor P-SIG signal input.
Motor P-SIG signal input.
Mode select signal output to Motor servo IC (IC601).
Mode select signal output to Motor servo IC (IC601).
Tone select switch signal output. L : OFF, Open : BOOSTON
Not used. (Open)
Ground. (A/D)
Non connection
Reference voltage input. (A/D)
MD mode switch signal input. (FWD/CENTER/RVS mode)
Power voltage detection signal input.
Power voltage detection signal input.
Operation switch signal input.
Not used. (Open)
Pin Name
P-SIG IN2
P-SIG IN1
CTL2
CTL1
BOOST CTL
NC
AVss
NC
AVR
MD SW
BATT DET1
BATT DET2
KEY IN
NC
Pin No.
1
2
3
4
5
6, 7
8
9
10
11, 12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38, 39
40
41
42
43
44, 45
46
47
48
49
50
I/O
–
I
I
I
I
–
O
–
O
–
O
O
O
O
–
O
O
O
–
O
O
O
–
O
O
–
O
O
O
–
O
O
O
O
I
–
I
O
I
I
–
I
O
I
–
I
Description
Power supply terminal. (A/D)
Reset signal input.
Test input terminal. (Connect to Vss terminal.)
Test input terminal. (Connect to Vss terminal.)
Crystal oscillator connection terminal. (4 MHz)
Not used. (Open)
Crystal oscillator connection terminal. (4 MHz)
Power supply pin.
Not used. (Open)
Not used. (Open)
Not used. (Open)
Tone select switch signal output. H: HI UP ON
Tone select switch signal output. H: REVIVE ON
Dolby circuit control signal output. L: ON
Not used. (Open)
Music with/without detection (AMS) signal output. (H : with, L :without)
Plunger control signal output. H : ON
Rotational detection intermittent signal output. H : ON
Not used. (Open)
Rotational detection intermittent signal output. H : ON
Audio circuit and DDC control signal output. L : STOP, H : NORMAL
Surround circuit control signal output. L : ON
Ground
Motor control signal output.
Motor control signal output.
Not used. (Open)
Motor control signal output.
Head select signal output. L : FWD, H : RVS
Audio muting control signal output. L : MUTE ON
Not used. (Open)
Metal/normal tape select signal output.
Motor wake-up signal output. L : wake-up, open : normally
Motor speed 1/2 control signal output. L :1/2 speed, H :normally
Motor rotational derection control signal output. L :CW, Open :CCW
Remote control with/without detection signal input.
Not used. (Open)
Music with/without detection (AMS) signal input. H : without
Communication data signal output.
Rotational detectionsignal input.
Rotational detectionsignal input.
Not used. (Open)
Side A/B detection switch dignal input. L :side A, H : side B
Beep signal output.
Cassette with/without detection switch signal input. L :with, H :without
Not used. (Open)
Clock make up signal input.
Pin Name
AVCC
RST
MODE0
MODE1
X0
NC
X1
VCC
X0A
NC
X1A
HI UP CTL
RV CTL
DOLBY CTL
NC
AMS OUT
PM CLT
PHOTO(S)CTL
NC
PHOTO(T)CTL
POWER CTL
SURROUND CTL
VSS
MOTOR U
MOTOR V
NC
MOTOR W
F/R CTL
MUTE CTL
NC
M/N CTL
MOTOR START
SPEED CTL
MOTOR DIR
RMUM
NC
AMS IN
DATA OUT
PHOTO(S)IN
PHOTO(T)IN
NC
A/B SW
BEEP
CASSETTE SW
NC
WAKE UP

SECTION 7
EXPLODEDVIEWS
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
delayshould be anticipated when orderingthese
items.
• Themechanical parts with no reference number
in the exploded views are not supplied.
• Hardware (# mark) list and accessories and
packing materials are given in the last of this
parts list.
— 25 —
• Color Indication ofAppearance Parts Example:
KNOB, BALANCE (WHITE) . . . (RED)
↑ ↑
Parts of Color Cabinet’s Color
• Abbreviation
CND : Canadian model
AUS : Australian model
FR : French model
KR : Korea model
JE : Tourist model
7-1. CASE SECTION
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
1 3-038-057-01 TERMINAL BOARD, BATTERY
2 3-345-648-71 SCREW(M1.4), TOOTHED LOCK
3 3-375-114-41 SCREW
4 3-038-056-01 TERMINAL BOARD (MINUS) (/M)
5 A-3061-994-A MAIN BOARD, COMPLETE (EXCEPT FR)
5 A-3061-997-A MAIN BOARD, COMPLETE (FR)
6 3-038-624-01 LID,BATTERY CASE
7 3-366-892-11 SCREW(M1.4 ×1.4)
8 X-3377-726-1 TERMINAL BOARD ASSY (/M)
9 A-3052-056-A ORNAMENT (OPEN) BLOCK ASSY
10 3-038-627-01 SHEET (CASE), ADHESIVE
11 4-963-883-51 SCREW (M1.4), PRECISION PAN
12 3-029-220-01 SPRING, TENSION
13 3-365-630-41 SCREW (M1.4)
14 X-3377-717-1 BRACKET ASSY (/M)
15 3-038-054-01 LEVER (B) (/M), LOCK
16 3-366-892-01 SCREW (M1.4)
17 X-3377-780-1 BRACKET (CASSETTE) ASSY
18 X-3377-779-1 LID ASSY, CASSETTE
19 3-704-197-41 SCREW (M1.4 ×2.2)
20 3-038-630-01 COVER, MD (JE)
20 3-038-630-11 COVER, MD (AEP,UK,FR)
20 3-038-630-21 COVER, MD (US,CND,E,KR,AUS)
21 3-038-616-01 ORNAMENT (CASE)
22 3-038-615-01 CASE(1680)
23 3-704-197-01 SCREW (M1.4 ×1.6), LOCKING
24 3-038-617-01 KNOB(VOL)
25 3-038-625-01 WINDOW (CASSETTE), ORNAMENT
26 3-038-628-01 SHEET (CASSETTE WINDOW)
*27 1-674-823-11 SUB BOARD
28 3-324-509-01 CUSHION
29 3-031-460-01 SHEET(BT)
S704 1-762-553-11 SWITCH, LEAF (TAPE IN/ATS)
29
28 1
2
3
11
4
3
56
8
7
7
15
9
16
27
14
13 17
18
19
19
19
19
26
25
20
21
1024
22
23
A
A
B
B
11
12

MT-WMEX20-162
S704

— 26 —
7-2. MECHANISM DECK BLOCK
Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
51 X-3377-589-1 HOLDER (FA) ASSY
52 X-3377-995-1 LEVER (R2) ASSY, PINCH
53 X-3377-994-1 LEVER (N2) ASSY, PINCH
54 3-029-275-01 WASHER (STOPPER N)
55 3-029-278-01 WASHER
56 X-3377-037-1 CHASSIS ASSY (FA)
57 3-386-694-01 WASHER
58 3-029-287-11 SPRING (TG), TORSION
59 3-029-281-01 GEAR, IDLER (B)
60 3-029-306-11 FLYWHEEL (N), INSERT
61 3-029-285-01 GEAR, CAM
62 3-029-282-01 GEAR(Y)
63 3-029-284-01 LEVER, TRIGGER
64 X-3376-813-1 CLUCH ASSY (F)
65 3-932-724-21 WASHER
66 3-029-286-01 GEAR(NR)
67 3-038-612-01 BELT(F KAI)
68 3-007-433-01 SHEET (N), REFLECTION
69 3-029-283-01 GEAR, IDLER (A)
70 3-029-765-01 SCREW (M1.4), TOOTHED LOCK
71 3-029-268-11 FLYWHEEL (R), INSERT
72 3-029-883-01 RETAINER (F1), MOTOR
73 3-029-273-01 GEAR(FR)
74 3-010-273-02 GEAR(REEL)
75 3-029-288-01 PULLEY, REVERSE
76 3-010-954-01 SPRING (BT), COMPRESSION
77 3-010-274-02 TABLE, REEL
78 3-029-289-01 WASHER
79 3-029-276-01 WASHER (STOPPER R)
80 3-007-428-01 WASHER (R)
81 3-029-271-11 SPRING (HD)
82 3-038-611-01 SPRING (HD2)
83 3-038-610-01 LEVER, HEAD
84 3-038-613-01 SEAL(MOTOR)
85 3-033-757-01 SHEET(H)
M601 1-763-165-21 MOTOR (CAPSTAN/REEL MOTOR)
(WITH PULLY)
HP701 1-500-623-31 HEAD, MAGNETIC (PLAYBACK)
PM701 1-454-674-31 SOLENOID, PLUNGER
51
M601
HP701
PM701
52
54
55
53
56
58
59
60 61
62 64
63
65
66
67
68
69 70
71
72
73
74
75
76
77
78
79
81
82
83
85
84
57
80

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 27 —
SECTION 8
ELECTRICAL PARTS LIST
NOTE:
• Due to standardization, replacements in the
parts list may be different from the parts
specifiedinthe 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.
• 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
CND : Canadian model
AUS : Australian model
FR : French model
KR : Korea model
JE : Tourist model
• 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.
Les composants identifiés par une marque
!sont critiques pour la sécurité.
Ne les remplacer que par une pièce portant
le numéro spécifié.
A-3061-994-A MAIN BOARD, COMPLETE (EXCEPT FR)
*********************
A-3061-997-A MAIN BOARD, COMPLETE (FR)
*********************
3-032-323-01 PAPER (A), SHIELD
< CAPACITOR >
C103 1-107-520-11 TANTAL. CHIP 33uF 20% 2.5V
C104 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C106 1-115-156-11 CERAMIC CHIP 1uF 10V
C107 1-115-156-11 CERAMIC CHIP 1uF 10V
C108 1-115-156-11 CERAMIC CHIP 1uF 10V
C109 1-115-156-11 CERAMIC CHIP 1uF 10V
C110 1-117-863-11 CERAMIC CHIP 0.47uF 10% 6.3V
C111 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C112 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C113 1-115-156-11 CERAMIC CHIP 1uF 10V
C203 1-107-520-11 TANTAL. CHIP 33uF 20% 2.5V
C204 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C206 1-115-156-11 CERAMIC CHIP 1uF 10V
C207 1-115-156-11 CERAMIC CHIP 1uF 10V
C208 1-115-156-11 CERAMIC CHIP 1uF 10V
C209 1-115-156-11 CERAMIC CHIP 1uF 10V
C210 1-117-863-11 CERAMIC CHIP 0.47uF 10% 6.3V
C211 1-115-467-11 CERAMIC CHIP 0.22uF 10% 10V
C212 1-113-619-11 CERAMIC CHIP 0.47uF 10V
C213 1-115-156-11 CERAMIC CHIP 1uF 10V
C301 1-135-151-21 TANTALUM CHIP 4.7uF 20% 4V
C302 1-113-600-11 TANTAL. CHIP 2.2uF 20% 6.3V
C303 1-135-316-11 TANTAL. CHIP 22uF 20% 2.5V
C304 1-115-156-11 CERAMIC CHIP 1uF 10V
C305 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C307 1-135-149-21 TANTALUM CHIP 2.2uF 20% 10V
C308 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C309 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C310 1-165-112-11 CERAMIC CHIP 0.33uF 16V
C311 1-165-128-11 CERAMIC CHIP 0.22uF 16V
C312 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C313 1-164-360-11 CERAMIC CHIP 0.1uF 16V
C314 1-162-927-11 CERAMIC CHIP 100PF 5% 50V
C315 1-135-151-21 TANTALUM CHIP 4.7uF 20% 4V
C316 1-135-151-21 TANTALUM CHIP 4.7uF 20% 4V
C317 1-125-976-91 TANTAL. CHIP 150PF 20% 2.5V
C318 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C319 1-104-847-11 TANTAL. CHIP 22uF 20% 4V
C320 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C321 1-135-201-11 TANTALUM CHIP 10uF 20% 4V
C323 1-135-201-11 TANTALUM CHIP 10uF 20% 4V
C324 1-135-201-11 TANTALUM CHIP 10uF 20% 4V
C325 1-162-967-11 CERAMIC CHIP 0.0033uF 10% 50V
C326 1-162-968-11 CERAMIC CHIP 0.0047uF 10% 50V
C327 1-107-826-91 CERAMIC CHIP 0.1uF 10% 16V
C328 1-115-156-11 CERAMIC CHIP 1uF 10V
C329 1-115-156-11 CERAMIC CHIP 1uF 10V
C601 1-125-837-91 CERAMIC CHIP 1uF 10% 6.3V
C602 1-115-156-11 CERAMIC CHIP 1uF 10V
C603 1-115-156-11 CERAMIC CHIP 1uF 10V
C604 1-115-156-11 CERAMIC CHIP 1uF 10V
C605 1-117-863-11 CERAMIC CHIP 0.47uF 10% 6.3V
C606 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C607 1-165-176-11 CERAMIC CHIP 0.047uF 10% 16V
C608 1-119-663-11 TANTAL. CHIP 47uF 20% 2.5V
C609 1-164-227-11 CERAMIC CHIP 0.022uF 10% 25V
C610 1-127-671-91 CERAMIC CHIP 10000PF 5% 50V
C611 1-162-964-11 CERAMIC CHIP 0.001uF 10% 50V
C612 1-135-149-21 TANTALUM CHIP 2.2uF 20% 10V
C701 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C702 1-135-259-11 TANTAL. CHIP 10uF 20% 6.3V
C703 1-115-156-11 CERAMIC CHIP 1uF 10V
C704 1-164-505-11 CERAMIC CHIP 2.2uF 16V
C705 1-115-156-11 CERAMIC CHIP 1uF 10V
C706 1-164-360-11 CERAMIC CHIP 0.1uF 16V
< CAPACITOR BLOCK >
CB301 1-131-597-21 CERAMIC CHIP 15000PF 0 25V
CB302 1-127-575-21 CERAMIC CHIP 470PF 0 50V
< DIODE >
D101 8-719-422-37 DIODE MA8051
D201 8-719-422-37 DIODE MA8051
D301 8-719-422-37 DIODE MA8051
D701 8-719-073-01 DIODE MA111-(K8).S0
D702 8-719-049-09 DIODE 1SS367-T3SONY
D703 8-719-422-37 DIODE MA8051
< FUSE >
F701 1-533-792-11 FUSE (SMD) 0.25A/125V
< FERRITE BEAD >
FB701 1-414-760-21 INDUCTOR CHIP 0uH
MAIN

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 28 —
< IC >
IC301 8-759-579-12 IC TA2123AF(EL)
IC302 8-759-597-24 IC NJM2190V(TE2)
IC303 8-759-488-80 IC NJM2185AV-TE2
IC601 8-759-553-51 IC LB1994M-TLM
IC701 8-759-597-25 IC XC6372A211PR
IC702 8-759-597-27 IC MB89135LPFV-534-STR
IC703 8-759-438-27 IC MM1305BWBE
IC704 8-759-445-09 IC XC61AS0VXXMR
IC705 8-759-592-24 IC XC61AN1502MR
< JACK >
J301 1-779-867-81 JACK (2/REMOTE)
< JUMPER CHIP >
JC101 1-216-864-11 METAL CHIP 0 5% 1/16W
(EXCEPT FR)
JC201 1-216-864-11 METAL CHIP 0 5% 1/16W
(EXCEPT FR)
< COIL >
L701 1-412-034-11 INDUCTOR CHIP 330uH
< PHOTO INTERRUPTER >
PH701 8-749-016-56 REFLECTOR NJL5197K-F20(TE1)
PH702 8-749-016-56 REFLECTOR NJL5197K-F20(TE1)
< TRANSISTOR >
Q301 8-729-426-36 TRANSISTOR XP1215-TXE
Q302 8-729-037-76 TRANSISTOR UN9215J-(TX).SO
Q303 8-729-426-36 TRANSISTOR XP1215-TXE
Q304 8-729-046-89 TRANSISTOR 2SB970-S(TX).S0
Q305 8-729-800-71 TRANSISTOR 2SB815B7-TB
Q306 8-729-038-05 TRANSISTOR HN1K02FU(T5RSONY)
Q307 8-729-038-05 TRANSISTOR HN1K02FU(T5RSONY)
Q308 8-729-230-63 TRANSISTOR 2SC4116-YG
Q309 8-729-426-36 TRANSISTOR XP1215-TXE
Q310 8-729-230-63 TRANSISTOR 2SC4116-YG
Q311 8-729-038-05 TRANSISTOR HN1K02FU(T5RSONY)
Q312 8-729-046-89 TRANSISTOR 2SB970-S(TX).S0
Q313 8-729-038-05 TRANSISTOR HN1K02FU(T5RSONY)
Q314 8-729-037-63 TRANSISTOR UN9115J-(TX).SO
Q601 8-729-043-94 TRANSISTOR CPH3106-PM-TL
Q602 8-729-037-76 TRANSISTOR UN9215J-(TX).SO
Q603 8-729-420-24 TRANSISTOR 2SB1218A-QRS
Q604 8-729-037-71 TRANSISTOR UN9210J-(TX).SO
Q605 8-729-039-36 TRANSISTOR MDC06TR
Q701 8-729-046-89 TRANSISTOR 2SB970-S(TX).S0
Q704 8-729-020-99 TRANSISTOR UN5215-RS-TX
Q705 8-729-427-51 TRANSISTOR XP4215-TXE
Q706 8-729-426-36 TRANSISTOR XP1215-TXE
Q707 8-729-402-16 TRANSISTOR XN4608
Q708 8-729-425-46 TRANSISTOR XP4315-TXE
< RESISTOR >
R101 1-216-845-11 METAL CHIP 100K 5% 1/16W
R102 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R103 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R104 1-216-835-11 METAL CHIP 15K 5% 1/16W
R105 1-216-811-11 METAL CHIP 150 5% 1/16W
R107 1-216-837-11 METAL CHIP 22K 5% 1/16W
R108 1-216-789-11 METAL CHIP 2.2 5% 1/16W
R110 1-216-827-11 METAL CHIP 3.3K 5% 1/16W
R111 1-216-839-11 METAL CHIP 33K 5% 1/16W
R112 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R113 1-216-857-11 METAL CHIP 1M 5% 1/16W
R114 1-216-841-11 METAL CHIP 47K 5% 1/16W
R115 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R116 1-216-835-11 METAL CHIP 15K 5% 1/16W
R150 1-216-811-11 METAL CHIP 150 5% 1/16W
(FR)
R201 1-216-845-11 METAL CHIP 100K 5% 1/16W
R202 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R203 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R204 1-216-835-11 METAL CHIP 15K 5% 1/16W
R205 1-216-811-11 METAL CHIP 150 5% 1/16W
R207 1-216-837-11 METAL CHIP 22K 5% 1/16W
R208 1-216-789-11 METAL CHIP 2.2 5% 1/16W
R210 1-216-827-11 METAL CHIP 3.3K 5% 1/16W
R211 1-216-839-11 METAL CHIP 33K 5% 1/16W
R212 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R213 1-216-857-11 METAL CHIP 1M 5% 1/16W
R214 1-216-841-11 METAL CHIP 47K 5% 1/16W
R215 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R216 1-216-835-11 METAL CHIP 15K 5% 1/16W
R250 1-216-811-11 METAL CHIP 150 5% 1/16W
(FR)
R301 1-216-841-11 METAL CHIP 47K 5% 1/16W
R302 1-216-837-11 METAL CHIP 22K 5% 1/16W
R303 1-216-853-11 METAL CHIP 470K 5% 1/16W
R304 1-216-849-11 METAL CHIP 220K 5% 1/16W
R305 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R306 1-216-851-11 METAL CHIP 330K 5% 1/16W
R307 1-216-793-11 RES,CHIP 4.7 5% 1/16W
R308 1-216-833-91 RES,CHIP 10K 5% 1/16W
R309 1-216-823-11 METAL CHIP 1.5K 5% 1/16W
R310 1-216-837-11 METAL CHIP 22K 5% 1/16W
R311 1-218-899-11 METAL CHIP 150K 0.50% 1/16W
R312 1-218-887-11 METAL CHIP 47K 0.50% 1/16W
R314 1-216-837-11 METAL CHIP 22K 5% 1/16W
R315 1-216-853-11 METAL CHIP 470K 5% 1/16W
R316 1-216-853-11 METAL CHIP 470K 5% 1/16W
R317 1-216-837-11 METAL CHIP 22K 5% 1/16W
R318 1-216-837-11 METAL CHIP 22K 5% 1/16W
R319 1-216-837-11 METAL CHIP 22K 5% 1/16W
R321 1-216-853-11 METAL CHIP 470K 5% 1/16W
R322 1-216-805-11 METAL CHIP 47 5% 1/16W
R323 1-216-805-11 METAL CHIP 47 5% 1/16W
R601 1-216-841-11 METAL CHIP 47K 5% 1/16W
R602 1-216-841-11 METAL CHIP 47K 5% 1/16W
R603 1-216-837-11 METAL CHIP 22K 5% 1/16W
R604 1-216-833-91 RES,CHIP 10K 5% 1/16W
R605 1-216-845-11 METAL CHIP 100K 5% 1/16W
R606 1-216-833-91 RES,CHIP 10K 5% 1/16W
R607 1-216-853-11 METAL CHIP 470K 5% 1/16W
R608 1-216-833-91 RES,CHIP 10K 5% 1/16W
R609 1-216-849-11 METAL CHIP 220K 5% 1/16W
R610 1-216-847-11 METAL CHIP 150K 5% 1/16W
R611 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R612 1-216-845-11 METAL CHIP 100K 5% 1/16W
R613 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
R614 1-216-829-11 METAL CHIP 4.7K 5% 1/16W
MAIN

Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks
— 29 —
R615 1-216-831-11 METAL CHIP 6.8K 5% 1/16W
R616 1-216-845-11 METAL CHIP 100K 5% 1/16W
R617 1-216-851-11 METAL CHIP 330K 5% 1/16W
R618 1-216-857-11 METAL CHIP 1M 5% 1/16W
R619 1-216-857-11 METAL CHIP 1M 5% 1/16W
R620 1-216-845-11 METAL CHIP 100K 5% 1/16W
R702 1-216-855-11 METAL CHIP 680K 5% 1/16W
R703 1-216-821-11 METAL CHIP 1K 5% 1/16W
R704 1-216-853-11 METAL CHIP 470K 5% 1/16W
R705 1-216-853-11 METAL CHIP 470K 5% 1/16W
R706 1-216-855-11 METAL CHIP 680K 5% 1/16W
R707 1-216-821-11 METAL CHIP 1K 5% 1/16W
R708 1-216-845-11 METAL CHIP 100K 5% 1/16W
R709 1-216-849-11 METAL CHIP 220K 5% 1/16W
R710 1-216-849-11 METAL CHIP 220K 5% 1/16W
R712 1-216-853-11 METAL CHIP 470K 5% 1/16W
R713 1-216-853-11 METAL CHIP 470K 5% 1/16W
R714 1-216-841-11 METAL CHIP 47K 5% 1/16W
R715 1-216-849-11 METAL CHIP 220K 5% 1/16W
R716 1-216-853-11 METAL CHIP 470K 5% 1/16W
R717 1-218-879-11 METAL CHIP 22K 0.50% 1/16W
R718 1-216-845-11 METAL CHIP 100K 5% 1/16W
R719 1-216-849-11 METAL CHIP 220K 5% 1/16W
R720 1-216-833-91 RES,CHIP 10K 5% 1/16W
R721 1-216-845-11 METAL CHIP 100K 5% 1/16W
R722 1-216-849-11 METAL CHIP 220K 5% 1/16W
R723 1-216-853-11 METAL CHIP 470K 5% 1/16W
R724 1-216-841-11 METAL CHIP 47K 5% 1/16W
R725 1-218-839-11 METAL CHIP 470 0.50% 1/16W
R726 1-218-851-11 METAL CHIP 1.5K 0.50% 1/16W
R727 1-216-821-11 METAL CHIP 1K 5% 1/16W
R728 1-216-849-11 METAL CHIP 220K 5% 1/16W
R729 1-216-853-11 METAL CHIP 470K 5% 1/16W
< COMPOSITION CIRCUIT BLOCK >
RB301 1-234-214-21 RES, NETWORK 1.5K (3216)
< VARIABLE RESISTOR >
RV601 1-223-325-21 RES, ADJ, METAL GLAZE 100K
< SWITCH >
S301 1-692-605-11 SWITCH, SLIDE (VOLUME)
S701 1-762-516-11 SWITCH, PUSH (1 KEY)(A/B)
S702 1-771-475-21 SWITCH, SLIDE (F/R)
< VIBRATOR >
X701 1-767-289-11 VIBRATOR, CERAMIC (4MHz)
************************************************************
*1-674-823-11 SUB BOARD
*********
< SWITCH >
S703 1-771-053-21 SWITCH, KEY BOARD (OPERATION)
************************************************************
MISCELLANEOUS
*************
S704 1-762-553-11 SWITCH, LEAF (TAPE IN/ATS)
M601 1-763-165-21 MOTOR (CAPSTAN/REEL MOTOR)
(WITH PULLY)
HP701 1-500-623-11 HEAD, MAGNETIC (PLAYBACK)
PM701 1-454-674-32 SOLENOID, PLUNGER
************************************************************
ACCESSORIES & PACKING MATERIALS
*******************************
1-418-544-11 REMOTE CONTROL UNIT(RM-WME22S)
!1-528-252-21 BATTERY CHARGER (BC-7S) (UK)
1-528-299-41 BATTERY, NI-CD (NC-6WM) (AEP,UK,FR)
1-528-299-51 BATTERY, NI-CD (NC-6WM) (US,CND)
!1-528-434-13 BATTERY CHARGER (BC-7SG) (AUS)
1-528-543-22 BATTERY, NI-CD (NC-6WM) (AUS)
!1-528-580-21 BATTERY CHARGER (BC-7HT) (E,JE)
!1-528-676-22 BATTERY CHARGER (BC-9HR) (KR)
!1-528-713-21 BATTERY CHARGER (BC-7DC) (US,CND)
!1-528-744-23 BATTERY CHARGER (BC-7DY) (AEP,FR)
1-528-842-11 BATTERY, NICKEL HYDROGEN (NH-14WM)
(E,KR,JE)
!1-569-007-11 ADAPTOR, CONVERSION 2P (E,JE)
1-759-213-11 CASE, BATTERY (US,CND,E,KR,AUS,JE)
1-759-700-21 CASE, BATTERY (DC IN 1.5V) (AEP,UK,FR)
3-008-521-01 CASE, BATTERY RECHARGEABLE
3-029-488-01 POUCH, CARRYING
3-867-217-01 MANUAL, INSTRUCTION
(JAPNESE/ENGLISH/KOREAN) (JE)
3-867-217-11 MANUAL, INSTRUCTION (ENGLISH/FRENCH)
(US,CND,AEP,UK,FR,AUS,CND,CND)
3-867-217-21 MANUAL, INSTRUCTION (GERMAN/DUTCH)
(AEP)
3-867-217-31 MANUAL, INSTRUCTION (SWEDISH/ITALIAN)
(AEP)
3-867-217-41 MANUAL, INSTRUCTION
(SPANISH/PORTUGUESE)(AEP,E)
3-867-217-51 MANUAL, INSTRUCTION (FINNISH) (AEP)
3-867-217-61 MANUAL, INSTRUCTION
(ENGLISH/CHINESE/KOREAN) (E,KR)
8-953-739-90 HEADPHONE MDR-E832SP
MAIN SUB
The components identified by
mark !or dotted line with mark
!are critical for safety.
Replace only with part number
specified.
Les composants identifiés par
une marque !sont critiques
pour la sécurité.
Ne les remplacer que par une
pièceportantle numérospécifié.

— 30 —
WM-EX20
Sony Corporation
Personal Audio Company 99H1689-1
Printed in Japan ©1999.8
Published by General Engineering Dept.
9-927-157-11