WM-EX621

SERVICE MANUAL

Ver 1.0 2001. 10
AEP Model UK Model E Model Chinese Model Tourist Model
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 Tape Transport Mechanism Type

WM-EX610 MT-WMEX610-162

SPECIFICATIONS
Frequency response Playback: 30 - Hz Output Headphones (i jack) Load impedance 8 - 300 Power requirements 1.5 V Rechargeable battery One R6 (size AA) battery Dimensions (w/h/d) Approx. 77.1 108.0 20.5 mm Mass Approx. 158 g Supplied accessories Battery case (1) Stereo headphones or earphones with remote control (1) Battery charger (1) Rechargeable battery (NC-6WM, 1.2 V, 600 mAh, Ni-Cd) (1) Carrying pouch (1) Rechargeable battery carrying case (1) Design and specifications are subject to change without notice.

CASSETTE PLAYER

9-873-318-01

2001J1600-1 2001.10

Sony Corporation
Personal Audio Company Published by Sony Engineering Corporation
TABLE OF CONTENTS 1. SERVICE NOTE 3 2. GENERAL 5 3. DISASSEMBLY
3-1. CASE SUB ASSY 7 3-2. MAIN BOARD 8 3-3. BELT (F4) 8 3-4. MOTOR (CAPSTAN/REEL) (M901) 9 3-5. LID ASSY, CASSETTE 9 3-6. ORNAMENT, REEL 10 3-7. HOLDER (FS) ASSY 10 3-8. LEVER (N)/(R) ASSY, PINCH 11 3-9. HEAD, MAGNETIC (HP901) 11 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 270C 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. Unleaded solder Boards requiring use of unleaded solder are printed with the lead free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size.)
4. MECHANICAL ADJUSTMENT 12 5. ELECTRICAL ADJUSTMENT 12 6. DIAGRAMS
6-1. BLOCK DIAGRAM 13 6-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS 14 6-3. IC BLOCK DIAGRAMS 14 6-4. SCHEMATAC DIAGRAM MAIN BOARD 15 6-5. PRINTED WIRING BOARD MAIN BOARD 16 6-6. IC PIN FUNCTION 17

7. EXPLODED VIEWS

7-1. CABINET BLOCK 19 7-2. MAIN BOARD BLOCK 20 7-3. MACHANISM BLOCK 7-4. MACHANISM BLOCK 2 22
8. ELECTRICAL PARTS LIST 23
: LEAD FREE MARK Unleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! Strong viscosity Unleaded solder is more viscous (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.
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.

SECTION 1 SERVICE NOTE

[Service Mode]
The service mode enables to operate the mechanism of WM-EX621 while the MAIN board is opened. Rotation of the idler gear (A) (S side) is detected using the photoreflector (PH701) in the WM-EX621. 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. 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. 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 SWITCH (S901-1) ATS SWITCH (S901-2)
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 x switch (S702) to enter the STOP mode. 4) Press the AMS switch (S704). 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 x switch (S702) to enter the stop mode. 4) When the nN 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 nN 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. Note 1: When you fail to enter the PLAY mode, re-start from step 2) PRE-SET status. Note 2: Regarding the nN (S703), x (S702), AMS (S704) 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).

Plunger (PM901)

MAIN BOARD (SIDE B)
AF OSC Short Battery terminal #
Square-wave (sine wave) 10 Hz, -3.5 dB

FF CUEAMSREVIEW REW

TP53 (P.IN)

(S704)

x(S702)

Battery terminal 3

YREPEAT (S703)

S701 FWD STOP REV

TP14 (GND)

[ Slider (NR) ]

[ Tape drive mechanism ] Tape drive mechanism in PLAY mode
Gear (FR) (REW:Right side)

Slider (NR)

Idler Gear (A) (S side) Gear (REEL) (S side) Motor Pulley

Cam Gear

F side R side Center

Gear (Y)

Clutch Assy (F) Insert Flywheel (N)

Pulley (Reverse)

Insert Flywheel (R)
Tape drive mechanism in FF mode
Tape drive mechanism in REW mode
Gear (NR) (FWD:Left side REV:Right side)
Idler Gear (A) (T side) Gear (REEL) (T side) Cam Gear
Gear (FR) (FF:Left side) Motor Pulley

Clutch Assy (F)

Idler Gear (B) Insert Flywheel (N) Insert Flywheel (R)

SECTION 2 GENERAL

This section is extracted from instruction manual.
UK, Australian, and Hong Kong model Other models

REV FWD

Plug in firmly. HOLD VOL VOL* HOLD REW () YREPEAT** x Swing lever FF (+) SOUND MODE Yx** OPEN
* There is a tactile dot beside VOL on the main unit to show the direction to turn up the volume. ** The button has a tactile dot.

Preparations

Prepare a dry battey (not supplied) or the rechargeable battery (supplied).
Operation on the remote control
T o Switch playback to the other side Stop playback Fast forward* Rewind* Press Yx more than a second during playback Yx once during playback FF during stop REW during stop

Using Other Functions

Adjusting Playback Mode
You can adjust the playback direction mode (s or d) as well as the BL SKIP mode (on or off). 1 Press MODE repeatedly. With each press the indications change as follows:

Dry Battery A

Attach the supplied battery case, and then insert one R6 (size AA) battery with correct polarity.
Note For maximum performance we recommend that you use a Sony alkaline battery.
Play the other side from FF for 2 seconds or more the beginning (Skip during stop Reverse function) Play the same side from REW for 2 seconds or more the beginning (Rewind during stop Auto Play function) Repeat the current track Yx twice during (Repeat Single Track playback function) To stop a single repeat, press Yx once

Rechargeable Battery B

1 Insert the supplied rechargeable battery (NC-6WM) into the charger with correct polarity. 2 Plug in the charger to the house current (mains). UK, Australian, and Hong Kong model: Full charging takes about 3.5 hours. U.S.A., Canada, European Continent and Saudi Arabian model: Full charging takes about 2.5 hours. Korean model: The full charging time depends on the voltage of your mains. 110 V: 10 hours 220 V: 2.5 hours Other models: The full charging time depends on the voltage of your mains. 120 V: 10 hours V: 2.5 hours 3 Insert the fully charged battery into the rechargeable battery compartment. You can charge the battery about 300 times.
s v s BL SKIP v d v d BL SKIP
Operation on the main unit
T o Switch playback to the other side Stop playback Fast forward* Do this Press YREPEAT during playback. Press x. Move the swing lever toward.FF CUE once during stop. Move the swing lever toward REVIEW REW> once during stop.
When BL SKIP is displayed, the tape is fastforwarded to the next track if there is a blank space of longer than 12 seconds. You will hear repeated sets of three short beeps when skipping a blank. When s is displayed, both sides of the tape is played repeatedly. When d is displayed, both sides of the tape is played once (if you start from R (REV) side, only REV side will be played).
Note You cannot adjust the playback mode during fastforward or rewind.

* Automatic Music Sensor

Locking the Controls HOLD Function
Slide the HOLD switch in the direction of the arrow to lock the controls of the Walkman or the remote control.
Fast forward/rewind while listening to the sound (CUE/REVIEW) On the remote control: Press and hold FF/REW during playback and release it at the point you want. On the main unit: Move and hold the swing lever toward.FF CUE/REVIEW REW> during playback and release it at the point you want.

SECTION 3 DISASSEMBLY

Note : Follow the disassembly procedure as shown in the flow chart below.

Case sub assy

MAIN board

Belt (F4)

Motor (Capstan/Reel) (M901)

Lid assy, cassette

Ornament, reel

Holder (FS) assy

Lever (N)/(R) assy, pinch

Head, magnetic (HP901)

Note : Follow the disassembly procedure in the numerical order given.

3-1. CASE SUB ASSY

1 Lid,battery case

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 sub assy,align the Knob (HOLD) with the position of S707.
5 Remove the case sub assy in the direction of the arrow.

3-2. MAIN BOARD

3 Remove soldering (four points) from the leaf switch. 2 Remove soldering (six points) from the head flexible boards. 8 MAIN board Note : Be careful of the claw. 4 Remove soldering (two points) from plunger solenoid.

6 Two screws (M1.4)

7 Screw (M1.4)
5 Remove soldering (four points) from motor.

1 Shielded sheet

Head flexible board
SLIDER Note : When assembling the MAIN board, align the slider with the position of S701.

3-3. BELT (F4)

2 Terminal board (Battery # ) 3 Belt (F4)
Belt (F4) Insert Flywheel (R)
Motor Pulley Pulley (Reverse)

Insert Frywheel (N)

1Remove soldering from the battery terminal board.
3-4. MOTOR (CAPSTAN/REEL) (M901)
1 Two screws (M1.4) 2 Motor (Capstan/Reel) (M901)

3-5. LID ASSY, CASSETTE

2 Screw (P1.4 2.0) 4 Lid assy,cassette

2 Two screws (M1.4 2.0)

1 Open the cassette lid.

3 Shaft

3-6. ORNAMENT, REEL

5 Ornament,reel

4 Two claws

3 Boss

1 Two claws

2 Claw

3-7. HOLDER (FS) ASSY
2 Shaft 7 Bracket (cassette) assy 3 Lock Lever (B)
6 Shaft 1 Two screws (M1.4 1.4)

4 Screw (M1.4) 5 Shaft

0 Remove the holder (FS) assy in the direction of the arrow.

8 Shielded sheet

9 Remove soldering from six head flexible boards.
3-8. LEVER (N)/(R) ASSY, PINCH
1 Claw 2 Remove the pinch lever (R) assembly in the direction of the arrow.
4 Remove the pinch lever (N) assembly in the direction of the arrow. 3 Claw

Holder (FS) assy.

3-9. HEAD, MAGNETIC (HP901)
1 Two claws 2 Remove the magnetic head. (HP901)
SECTION 4 MECHANICAL ADJUSTMENT
SECTION 5 ELECTRICAL ADJUSTMENT
PRECAUTION Specified voltage: 1.3 V (DC) Switch position (MENU) AVLS : OFF BL SKIP : OFF MB/RV GRV : OFF

2. 3. 4.

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. The adjustments should be performed with the rated power supply voltage unless otherwise noted.
Test Tape Tape WS-48A Signal 3 kHz, 0 dB Used for Tape Speed Adjustment
Torque Measurement Mode FWD FWD Back Tension REW REW Back Tension FF, REW Torque Meter CQ-102D Meter Reading 14.7 to 24.5 mNm (15 to 25 gcm) (0.22 to 0.34 ozinch) 0.294 to 1.96 mNm (0.3 to 2.0gcm) (0.007 to 0.020 ozinch) 14.7 to 24.5 mNm (15 to 25 gcm) (0.22 to 0.34 ozinch) 0.294 to 1.96 mNm (0.3 to 2.0 gcm) (0.007 to 0.020 ozinch) More than 34.3 mNm (More than 35 gcm) (More than 0.69 ozinch)
Tape Speed Adjustment Procedure:
Test tape WS-48A (3kHz, 0dB) 16 Set +

CQ-102D

Frequency counter

CQ-102C

2 REMOTE jack (J301)

CQ-201B

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
WM-EX621 SECTION 6 DIAGRAMS

6-1. BLOCK DIAGRAM

AUDIO MASTER AMP ICRF OUT HP901 (PLAYBACK) L-CH FWD R-CH R-CH FWD IN-L PREAMP REV IN-L MTL DRV-L PRE OUT-L 18 BASE 19 VCC RIPPLE FILTER Q301 BATT B+

SIGNAL PATH : PLAYBACK R-ch is omitted due to same as L-ch.
RV301 VOL PW IN-L POWER AMP PW OUT-L

J301 2

R-CH PW IN-C BASS BOOST BST AMP OUT POWER AMP V/I PW NF-L R-CH EQ-L BEEP POWER AMP

EQ METAL CONTROL R-CH

F/R SW

PW OUT-R PW OUT-C

L-CH REV R-CH R-CH

M/N SW

AVLS CONTROL SWITCH Q304

BATT B+

VCC DATA REMOTE GND
R-CH S901-2 (ATS) R-CH CUE REVIEW VOLUM SWITCH Q306

AMS IN

AMS OUT BST SW

AGC DET

AGC IN

S707 HOLD

FWD STOP REV
S701 (DIRECTION) S901-1 (TAPE DETECT)
MEGA BASS/GROOVE SWITCHING Q303

MT SW PW SW

SR-CH REVIVE/GROOVE SWITCHING Q302

SYSTEM CONTROLLER IC3 2

REV SW CENTER SW FWD SW

F/R CTL

CASSETTE SW
CUE-REVIEW MOTOR RESTART MOTOR DIR

AVLS CTL

MEGA BASS CTL

BOOST CTL

REVIVE CTL
MOTOR CTL MUTE CTL VDD AMP CTL

DATA/RMUM KEY IN

SET STOP 1

SET STOP 2

SPEED CTL

BATT DET

13 BATT B+

14 DDC B+

X701 32.768kHz

RV601 TAPE SPEED

Q603 SPEED CONTROL SWITCH COMPARATOR IN+ 10 OUT + 11 VSP 9 SPEED CONTROL M901 (CAPSTAN/REEL) U 19 V 1 W 3
TH601 RESET SIGNAL GENERATOR IC703
7 VREF SWITCH & LOGIC CIRCUIT OSC CIRCUIT BIAS START REFERENCE 8 VOLTAGE

MOTOR DRIVE CIRCUIT

VDD B+
ROTATION DETECT SENSOR PH701 W DDC B+

REGULATOR IC704

OSC DR

DIRECTION CONTROL

CAPSTAN/REEL MOTOR DRIVE IC601 5

DDC B+

DC/DC CONVERTER IC702
6 PHOTO REFLECTOR SWITCH & BUFFER Q702
DRY BATTERY SIZE AA (IEC DESIGNATION R6) 1PC. 1.5V

IN PHOTO 37

BATT B+ +

PHOTO CTL 18

Q604 MOTOR CONTROL SWITCH PLUNGER DRIVE Q701 PM901 (PLUNGER)
BATTERY PACK (NI-CD) (NC-6WM 1.2V)

PM CTL 17

6-2. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. r : Through hole. : Pattern of the rear side. Caution: Pattern face side: (SIDE B) Parts face side: (SIDE A) Parts on the pattern face side seen from the pattern face are indicated. Parts on the parts face side seen from the parts face are indicated. Note on Schematic Diagram: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. % : indicates tolerance. C : panel designation. Y : 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 model

6-3. IC BLOCK DIAGRAMS

IC301 TA2123AF (EL)
BST OUT PW NF A PW IN A PW IN B PW NF B PW IN C LPF BST NF AGC IN

34 BST +

24 RF IN 23 PW GND 22 OUT B PW B 21 OUT C
C-AMP SW 37 MT TC 38 BEEP 39 AMS OUT 40 BEEP
MT SW PW SW BST SW F/R SW PRE SW M/N SW

SWITCH

PRE B MIX
PRE GND 47 VREF IN 48 VREF MTL DRV

IN A-F IN B-F VREF OUT

IN B-R

IN A-R

PRE NF-A

PRE OUT A

MTL DRV A

MTL DRV B

PRE OUT B

PRE NF-B

MM1279XVBE

20 PV 19 U V 1

PW W GND
4 MOTIVE CONTROL CIRCUIT PRE DRIVER SOFT SWITCH 14 TCTC2 SPEED CONTROL CURRENT CONTROL PU GND VCC FC

OSC DR VREF START

MOTIVE/ OSC

MOTIVE LOGIC

BIAS REFERENCE VOLTAGE

INVERTER + VSP 9

OUTPUT BIAS

12 ROUT

IN+ 10
PW A 20 OUT A 19 VCC RIPPLE FILTER
18 BASE 17 RF OUT 16 GND 15 AMS DET 14 AMS MIX 13 AMS SW

COMPARATOR

6-4. SCHEMATIC DIAGRAM MAIN BOARD

1.3 Vp-p

30.5 sec

2.8 Vp-p 11 sec

IC B/D

S901-1 (DETECT)

S901-2 (ATS)
6-5. PRINTED WIRING BOARD MAIN BOARD

: Uses unleaded solder.

FR EXCEPT FR

R150 R250

(P.IN)

IC601 IC301

IC702 IC704

EXCEPT FR

Semiconductor Location
Ref. No. D701 D702 D709 D710 D711 Location B-9 E-2 B-8 B-6 C-9 Ref. No. IC301 IC601 IC701 IC702 IC703 IC704 Location D-6 D-12 C-4 E-3 C-4 E-11 Ref. No. Q301 Q302 Q303 Q304 Q306 Q603 Location D-6 C-8 C-8 C-5 B-8 C-2 Ref. No. Q604 Q701 Q702 Location D-1 C-3 C-2

6-6. IC PIN FUNCTION

MAIN BOARD IC701 ML63512-129TBZ060 (SYSTEM CONTROL)
Pin No. 5 Pin Name N.C. FWD SW CENTER SW REV SW CASSETTE SW I/O I I I I Not used Detection switch (S701) input terminal L: FWD Detection switch (S701) input terminal L: CENTER Detection switch (S701) input terminal L: REV 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 signal input from remote commander having phone Tone selection signal output to TA2123AF (IC301) L: REVIVE H: OFF/MEGA BASS/GROOVE Tone selection signal output to TA2123AF (IC301) O O O O L: MEGA BASS H: OFF/REVIVE/GROOVE FWD/REV selection signal output to TA2123AF (IC301) L: FWD H: REV (empty terminal) Bass boost control signal output to TA2123AF (IC301) L: OFF H: ON Power supply ON/OFF control signal output to TA2123AF (IC301) 11 AMP CTL L: power supply OFF H: power supply ON Power mute control signal output to TA2123AF (IC301) MUTE CTL SET STOP1 SET STOP2 BATT DET KEY IN PM CTL PHOTO CTL LED BATT DOLBY CTL VDD1 VSS VDD VDDH CB1 CB2 VDDL XT0 XT1 TAT1B TAT2B OSCM OSC0 O I I I I O O O O I I I L: mute ON H: mute OFF Battery voltage detection input terminal when the machine is stopped. (A/D input) Reference voltage input terminal when the machine is stopped. (A/D input) Battery voltage detection input terminal (A/D input) Key input terminal (A/D input) Plunger drive signal output L: plunger ON Control signal output to the rotation detection circuit of the capstan/reel motor L: rotation detection circuit ON LED drive signal output to BATT display L: LED ON (empty terminal) Dolby ON/OFF control signal output to Dolby NR amplifier L: Dolby NR, ON, H: Dolby NR OFF (empty terminal) Power supply terminal for external interface (+2.5 V) Ground terminal Power supply terminal (+1.5 V) Step-up power supply terminal for back-up Terminal to which condenser for step-up power supply is connected Terminal to which condenser for step-up power supply is connected Power supply terminal for internal logic Terminal to which main system clock is connected (32.768 kHz) Terminal to which main system clock is connected (32.768 kHz) Test input terminal Normally, fixed to H. Test input terminal Normally, fixed to H. Terminal to which external capacitor for oscillation is connected Not used in this machine (empty terminal) Terminal to which resistance for high-speed CR oscillation (800 kHz) is connected Not used in this machine (empty terminal) Terminal to which resistance for high-speed CR oscillation (800 kHz) is connected Not used in this machine 34 OSC1 O (empty terminal) System reset signal input from the reset signal generator (IC703) L: reset RESET BEEP IN PHOTO AVLS CTL I O I O L is input for several hundreds msec after power supply starts up, then H is input. Beep sound output to TA2123AF (IC301) Rotation detection input of capstan/reel motor (M901) AVLS ON/OFF control signal output L: AVLS OFF, H: AVLS ON Description

REVIVE CTL MEGA BASS CTL F/R CTL BOOST CTL

Pin No. 43 44

Pin Name AMS IN LED AVLS LED BLSKIP LED MB LED REVIVE SPEED CTL

I/O I O O O O O

Description AMS detection signal input from TA2123AF (IC301) H: No music Drive signal output for AVLS display Not used in this machine (empty terminal) Drive signal output for BL SKIP display Not used in this machine (empty terminal) Drive signal output for MG GRV display Not used in this machine (empty terminal) Drive signal output for RV GRV display Not used in this machine (empty terminal) Motor speed control signal output to capstan/reel motor drive IC (IC601) L: normal H: half speed Motor start control signal output to capstan/reel motor drive IC (IC601) H: motor ON Motor direction control signal output to capstan/reel motor drive IC (IC601) L: clockwise H: counter-clockwise Audio attenuation ON/OFF control signal output to TA2123AF (IC301) L : OFF H : ON (CUE/REVIEW) Signal output for motor start-up status control to capstan/reel motor drive IC (IC601) H: during FF/REW motor rotating

MOTOR CTL

MOTOR DIR

CVE REVIEW MOTOR RESTART

WM-EX621 SECTION 7 EXPLODED VIEWS
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 Cabinets Color The mechanical parts with no reference number in the exploded views are not supplied.
When indicating parts by reference number, please include the board name.

7-1. CABINET BLOCK 14 15

Abbreviation FR : French model EE : East European model CH : Chinese model HK : Hong Kong model KR : Korean model JE : Tourist model

Remarks Ref. No. 15 15

Ref. No. 11
Part No. 3-029-230-01 3-233-763-01 3-233-763-11 3-233-763-21 3-225-996-11 3-233-978-01 3-233-976-01 3-233-979-01 3-234-098-01 3-234-098-11 3-234-098-21 3-233-977-01 3-233-975-01 3-234-092-01 3-233-980-01
Description KNOB (HOLD) CASE (SILVER) CASE (BLUE) CASE (ORANGE) SCREW (M1.4)(EG),PRECISION PAN PLATE, ORNAMENTAL BUTTON (REW.FF) SPRING, CLICK BASE (SILVER) BASE (BLUE) BASE (ORANGE) SHEET (BUTTON), ADHESIVE BUTTON (PLAY) BUTTON (STOP) LID, BATTERY CASE (SILVER)

Part No. 3-233-980-11 3-233-980-21 3-234-140-01 3-234-140-11 3-234-140-21
Description LID, BATTERY CASE (BLUE) LID, BATTERY CASE (ORANGE) COVER, MD (JEW) COVER, MD (AEP,EE,FR,UK) COVER, MD (CH,HK,KR)

Remarks

3-225-996-09 SCREW (M1.4)(EG),PRECISION PAN 3-704-197-11 SCREW (P1.4X2.0) X-3380-988-1 CASSETTE ASSY, LID (SILVER) (AEP,CH,EE,FR,HK,JEW,UK) X-3380-989-1 CASSETTE ASSY, LID (ORANGE) (AEP,CH,EE,FR,HK,JEW,UK) X-3380-990-1 CASSETTE ASSY, LID (BLUE) (AEP,CH,EE,FR,HK,JEW,UK) X-3381-250-1 X-3381-251-1 X-3381-252-1 3-233-977-01 3-939-581-01 CASSETTE ASSY, LID (SILVER) (KR) CASSETTE ASSY, LID (ORANGE) (KR) CASSETTE ASSY, LID (BLUE) (KR) SHEET (BUTTON), ADHESIVE CUSHION

7-2. MAIN BOARD BLOCK

MT-WMEX610-162

not supplied

Ref. No. 51 * 52 * Part No. Description Remarks Ref. No. S901 Part No. 3-939-590-05 3-038-054-01 3-389-523-02 3-223-827-31 3-223-827-41 3-223-827-51 3-029-220-11 3-222-732-21 3-222-732-31 3-222-732-41 X-3377-717-1 3-345-648-71 3-023-323-01 3-238-028-01 1-762-553-11 Description SCREW (IB LOCK) LEVER (B), LOCK SCREW (IB LOCK) ORNAMENT,REEL (SILVER) ORNAMENT,REEL (BLUE) ORNAMENT,REEL (ORANGE) SPRING, TENSION KNOB (OPEN) (SILVER) KNOB (OPEN) (BLUE) KNOB (OPEN) (ORANGE) BRACKET ASSY SCREW (M1.4), TOOTHED LOCK PAPER (A), SHIELD SHEET,PWB SWITCH, LEAF (TAPE DETECT/ATS) Remarks
3-375-114-41 SCREW A-3021-537-A MAIN PC BOARD ASSY (AEP,CH,EE,HK,JEW,KR,UK) A-3021-538-A MAIN PC BOARD ASSY (FR) 3-038-056-01 TERMINAL BOARD (MINUS) 3-031-460-01 SHEET (BT) 3-029-213-01 X-3377-726-1 3-365-630-41 X-3377-719-1 3-309-595-11 TERMINAL BOARD, BATTERY TERMINAL BOARD ASSY SCREW (M1.4) BRACKET (CASSETTE) ASSY SHEET, INSULATING, PACK

7-3. MECHANISM BLOCK 1

908 917

920 901

Ref. No. 909 910
Part No. 3-046-789-01 X-3378-354-1 3-029-275-01 3-029-278-01 3-029-276-01 3-029-289-01 3-007-428-01 3-029-288-01 3-029-268-11 3-386-694-01
Description SPRING (HDA) HOLDER (FS) ASSY WASHER (STOPPER N) WASHER WASHER (STOPPER R) WASHER WASHER (R) PULLEY, REVERSE FLYWHEEL (R), INSERT WASHER

Ref. No. HP901 M901

Part No. 3-029-306-11 3-220-035-01 3-029-282-01 3-932-724-21 X-3376-813-1 3-029-765-01 3-029-274-01 X-3377-362-1 X-3377-363-1 3-033-757-01
Description FLYWHEEL (N), INSERT BELT (F4) GEAR (Y) WASHER CLUTCH ASSY (FM) SCREW (M1.4), TOOTHED LOCK RETAINER (F2), MOTOR LEVER (N) ASSY, PINCH LEVER (R) ASSY, PINCH SHEET (H)
1-500-639-21 HEAD, MAGNETIC (PLAYBACK) 1-763-166-11 MOTOR (CAPSTAN/REEL)

7-4. MECHANISM BLOCK 2

960 961

Ref. No. 959 960

Part No. 3-010-274-02 3-010-954-01 X-3377-584-1 3-010-273-02 3-029-272-01 3-040-897-01 3-029-285-12 3-029-284-01 3-029-281-01 3-029-283-01
Description TABLE, REEL SPRING (BT), COMPRESSION CHASSIS ASSY (F) GEAR (REEL) SPRING (FR), TORSION SPRING (TGA), TORSION GEAR, CAM LEVER, TRIGGER GEAR, IDLER (B) GEAR, IDLER (A)

Ref. No. 963 PM901

Part No. 3-029-286-01 3-029-273-01 3-007-433-01 1-454-674-31
Description GEAR (NR) GEAR (FR) SHEET (N), REFLECTION SOLENOID, PLUNGER
WM-EX621 SECTION 8 ELECTRICAL PARTS LIST
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. CAPACITORS: uF: F RESISTORS All resistors are in ohms. METAL: metal-film resistor METAL OXIDE: Metal Oxide-film resistor F: nonflammable COILS uH: H SEMICONDUCTORS In each case, u: , for example: uA.: A. , uPA. , PA. , uPB. , PB. , uPC. , PC. , uPD., PD.
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 par t number specified.
Abbreviation FR : French model EE : East European model CH : Chinese model HK : Hong Kong model KR : Korean model JE : Tourist model Description Remarks 6.8uF 20.00% 2.5V 680PF 5.00% 25V 100PF 5% 50V (AEP,CH,EE,HK,JEW,KR,UK) 1uF 10% 6.3V 0.1uF 10.00% 16V 0.22uF 0.1uF 0.1uF 0.01uF 0.01uF 0.01uF 4.7uF 22uF 10uF 10PF 0.1uF 1uF 1uF 1uF 1uF 10.00% 10V 25V 10.00% 16V 10% 25V 10% 25V 10% 20% 20.00% 20.00% 0.5PF 25V 4V 6.3V 10V 50V

Ref. No. *

Part No.

Description

Ref. No. C322 C323 C325 C601 C602 C603 C604 C605 C606 C607 C608 C609 C701 C702 C703 C704 C705 C706 C707 C708 C709 C711 C712 CB301 CB303
A-3021-537-A MAIN BOARD, COMPLETE (AEP,CH,EE,HK,JEW,KR,UK) ********************** A-3021-538-A MAIN BOARD, COMPLETE (FR) ************************* 3-032-323-01 PAPER (A), SHIELD < CAPACITOR > C101 C102 C103 C104 C107 C108 C109 C111 C201 C202 C203 C204 C207 C208 C209 C211 C301 C302 C303 C304 C305 C306 C307 C308 C309 C310 C311 C312 C313 C314 C315 C316 C319 C320 C321 1-107-520-11 1-115-156-11 1-115-156-11 1-164-156-11 1-164-505-11 1-164-227-11 1-164-677-11 1-115-416-11 1-107-520-11 1-115-156-11 1-115-156-11 1-164-156-11 1-164-505-11 1-164-227-11 1-164-677-11 1-115-416-11 1-119-663-11 1-164-156-11 1-125-926-95 1-115-156-11 1-126-236-11 1-109-935-11 1-115-467-11 1-165-112-11 1-115-467-11 1-135-149-11 1-164-156-11 1-115-156-11 1-109-935-11 1-135-187-21 1-135-187-21 1-125-837-11 1-164-156-11 1-162-968-11 1-115-416-11 TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP TANTAL. CHIP CERAMIC CHIP ELECT TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP TANTAL. CHIP TANTAL. CHIP TANTAL. CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 33uF 1uF 1uF 0.1uF 2.2uF 0.022uF 0.033uF 0.001uF 33uF 1uF 1uF 0.1uF 2.2uF 0.022uF 0.033uF 0.001uF 47uF 0.1uF 4.7uF 1uF 330uF 4.7uF 0.22uF 0.33uF 0.22uF 2.2uF 0.1uF 1uF 4.7uF 2.2uF 2.2uF 1uF 0.1uF 0.0047uF 0.001uF 20.00% 2.5V 10V 10V 25V 16V 10% 10.00% 5.00% 20.00% 25V 16V 25V 2.5V 10V

1-216-825-11 METAL CHIP 1-216-819-11 METAL CHIP 1-218-839-11 METAL CHIP 1-216-853-11 METAL CHIP 1-216-853-11 METAL CHIP 1-216-815-11 METAL CHIP 1-216-811-11 METAL CHIP 1-216-849-11 METAL CHIP 1-216-839-11 METAL CHIP 1-216-811-11 METAL CHIP 1-216-831-11 1-216-823-11 1-216-825-11 1-216-837-11 1-216-789-11 1-216-821-11 1-216-837-11 1-216-825-11 1-216-819-11 METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP
1/16W 1/16W (FR) 470 0.5% 1/10W (AEP,CH,EE,HK,JEW,KR,UK) 470K 5% 1/16W 470K 5% 1/16W 220K 33K 150 6.8K 1.5K 2.2K 22K 2.2 1K 22K 2.2K 680 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/16W 1/16W (FR) 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W
1-216-825-11 METAL CHIP 1-216-857-11 METAL CHIP 1-218-903-11 METAL CHIP
< COMPOSITION CIRCUIT BLOCK > RB601 1-234-243-11 RES, NETWORK 220K (3216) < VARIABLE RESISTOR >

1-218-839-11 METAL CHIP

1/16W 1/16W 1/16W 1/16W (FR) 470 0.5% 1/10W (AEP,CH,EE,HK,JEW,KR,UK)

RV301 RV601

1-225-684-11 RES, VAR, CARBON 30K/30K (VOL) 1-225-254-11 RES, ADJ, CARBON 2.2K (TAOE SPEED)
Ref. No. Part No. Description < SWITCH > S701 S702 S703 S704 S707 1-771-475-11 1-771-053-11 1-771-053-11 1-771-475-11 SWITCH, SLIDE (DERECTION) SWITCH, KEY BOARD (x) SWITCH, KEY BOARD (bB REPEAT) SWITCH, SLIDE (REVIEW REW T AMS t FF CUE) 1-572-922-11 SWITCH, SLIDE (HOLD) < THERMISTOR > TH601 1-810-794-11 THERMISTOR, POSITIVE < VIBRATOR > X701 1-767-386-21 VIBRATOR, CRYSTAL (32.768kHz) ************************************************************** MISCELLANEOUS ************** HP901 1-500-639-21 HEAD, MAGNETIC (PLAYBACK) M901 1-763-166-11 MOTOR PM901 1-454-674-31 SOLENOID, PLUNGER S901 1-762-553-11 SWITCH, LEAF (TAPE DETECT/ATS) ************************************************************** 0 1-759-700-21 8-954-008-91 A-3052-265-A 3-220-749-01 1-569-007-11 CASE, BATTERY RECEIVER,EAR MDR-E808SP REMOTE CONTROL ASSY (RM-WME23) CASE, CARRYING ADAPTOR, CONVERSION 2P (JEW) 1-528-580-21 1-528-661-15 1-528-744-21 1-528-744-23 1-528-822-13 1-756-115-11 1-528-299-41 1-528-543-11 1-528-543-22 3-008-521-01 Remarks Ref. No. Part No. Description Remarks ACCESSORIES ************ BATTERY CHARGER (BC-7HT) (JEW) BATTERY CHARGER (BC-7DR) (KR) BATTERY CHARGER (BC-7DY) (AEP,EE,FR) BATTERY CHARGER (BC-7DY) (AEP,EE,FR) BATTERY CHARGER (BC-7DN) (CH) CHARGER, BATTERY (BC-7SP2) (HK,UK) BATTERY, NI-CD (NC-6WM) (AEP,EE,FR,UK) BATTERY, NI-CD (NC-6WM) (CH,HK,KR) BATTERY, NI-CD (NC-6WM) (JEW) CASE, BATTERY CHARGE

3-021-018-11 LABEL, FRANCE (FR) 3-234-046-01 MANUAL, INSTRUCTION (JAPANESE,ENGLISH,CHINESE,KOREAN) (JEW) 3-234-046-11 MANUAL, INSTRUCTION (ENGLISH,CHINESE,KOREAN) (CH,KR) 3-234-046-21 MANUAL, INSTRUCTION (SPANISH,PORTUGUESE,FRENCH,GERMAN) (AEP,FR) 3-234-046-31 MANUAL, INSTRUCTION (DUTCH,SWEDISH,ITALIAN,FINNISH) (AEP) 3-234-046-41 MANUAL, INSTRUCTION (ENGLISH,RUSSIAN) (AEP,EE,UK) 3-234-046-51 MANUAL, INSTRUCTION (CZECH,SLOVAK,HUNGARIAN,POLISH) (EE) 3-234-046-61 MANUAL, INSTRUCTION (ENGLISH,CHINESE) (HK)
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

REVISION HISTORY

Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page. Ver. 1.0 Date 2001.10 New Description of Revision