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WM-EX921
SERVICE MANUAL
Ver 1.0 2001.10
AEP Model E Model Chinese Model Tourist Model
Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories.
Model Name Using Similar Mechanism Tape Transport Mechanism Type
NEW MT-WMEX921-162
SPECIFICATIONS
Frequency response (Dolby NR off) Playback: 30 - 18 000 Hz Output Headphones (i jack) Load impedance 8 - 300 Power requirements 1.5 V One rechargeable battery Dimensions (w/h/d) Approx. 77.1 × 108.8 × 20.2 mm Mass Approx. 147 g Supplied accessories Stereo headphones or earphones with remote control (1) Battery charging stand (1) AC power adaptor (1) Rechargeable battery (NH-14WM (A), 1.2 V, 1 350 mAh (MIN), Ni-MH) (1) Rechargeable battery carrying case (1) Carrying pouch (1) Design and specifications subject to change without notice. Battery life (Approx. hours) (in playback) Rechargeable NH-14WM (A) fully charged (JEITA*) 45
* Measured value by the standard of JEITA (Japan Electronics and Information Technology Industries Association). (Using a Sony HF series cassette tape)
Note · The battery life may be shorter depending on the operating condition and the surrounding temperature.
CASSETTE PLAYER
9-873-307-01
2001J0500-1 C 2001.10
Sony Corporation
Personal Audio Company Published by Sony Engineering Corporation
WM-EX921
TABLE OF CONTENTS 1. 2. 3.
3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10.
Note on the AC power adaptor
Use only the supplied AC power adaptor. Do not use any other AC power adaptor.
Polarity of the plug
SERVICING NOTES ............................................... 3 GENERAL ................................................................... 5 DISASSEMBLY
Disassembly Flow ........................................................... Case Section .................................................................... MAIN Board ................................................................... Belt (F0) .......................................................................... Motor, DC (Capstan/Reel) (M601) ................................. Lid Assy, Cassette ........................................................... Ornament (Open) Block Assy ......................................... Holder (FA) Assy ............................................................ "Lever (N2) Assy, Pinch", "Lever (R2) Assy, Pinch" .... Head, Magnetic (Playback) (HP901) ............................. 6 6 7 7 8 8 9 9 10 10
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 the 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. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the leadfree 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) : LEAD FREE MARK Unleaded solder has the following characteristics. · Unleaded solder melts at a temperature about 40 °C 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 350 °C . 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.
4. 5. 6.
MECHANICAL ADJUSTMENTS ....................... 11 ELECTRICAL ADJUSTMENTS ......................... 11 DIAGRAMS
13 14 16 17 18 19 20
6-1. Block Diagram ................................................................ 6-2. Note for Printed Wiring Board and Schematic Diagrams ................................................ 6-3. Printed Wiring Board MAIN Board (Component Side) .............................. 6-4. Printed Wiring Board MAIN Board (Conductor Side) ................................ 6-5. Schematic Diagram MAIN Board (1/2) .................. 6-6. Schematic Diagram MAIN Board (2/2) .................. 6-7. IC Pin Function Description ...........................................
7.
7-1. 7-2. 7-3. 7-4. 7-5. 7-6.
EXPLODED VIEWS
Cassette Lid Assy Section ............................................... Case Section .................................................................... MAIN Board Section ...................................................... Mechanism Deck Section-1 (MT-WMEX921-162) ....... Mechanism Deck Section-2 (MT-WMEX921-162) ....... Mechanism Deck Section-3 (MT-WMEX921-162) ....... 21 22 23 24 25 26
8.
ELECTRICAL PARTS LIST ............................... 27
SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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
WM-EX921 SECTION 1 SERVICING NOTES
This set detects the rotation of the idler gear (A) (side S) using the photo reflector (PH701). The PH701 is mounted on the MAIN board, therefore the idler gear (A) (side S) cannot be detected with the MAIN board removed. As a result, the motor (M601) cannot be controlled, causing malfunction. Further, the DIRECTION switch (S702) is also mounted on the MAIN board, and with the board removed, the mechanism position cannot be detected and the operation is not changed over. Therefor, when the voltage check is executed with the MAIN board removed, follow the procedure provided below. 1. Setting 1) Refer to "3. DISASSEMBLY", and remove the MAIN board. 2) Connect the MAIN board to the motor (M601) and the plunger (PM701) using jumper wires. These can be connected easily with the use of the extension tool (Part No. 1-769-143-11) (ten in one set). 3) Short the lands (BP1) by solder. 4) Connect the AF oscillator to the TP31 (PH-S) and the TP10 (GND). 5) Supply 1.3 V to the battery terminals using the regulated power supply. 2. Preset state To set the PLAY, FF, REW modes, the preset state must be set. 1) Check that the slider (NRA) and the DIRECTION switch (S702) are set to the center position. If not, set the preset state as follow. 2) Move the DIRECTION switch (S702) to the side, which the slider (NRA) is facing. 3) The slider (NRA) will move when the regulated power supply switch is set to OFF once and then set to ON. Move the DIRECTION switch (S702) according to this timing and set to the center position. 3. FF, REW modes 1) Check that the preset state is set. 2) Input the square wave or sine wave to the TP31 (PH-S) and the TP10 (GND). 3) Move the jog lever (S703) toward [FF] or [REW]. 4. PLAY mode 1) Check that the preset state is set. 2) Input the square wave or sine wave to the TP31 (PH-S) and the TP10 (GND). 3) Press the jog lever (S703) will move the slider (NRA) once towards the side REV and then to the side FWD. Move the DIRECTION switch (S702) according to this timing will set the PLAY mode (side FWD). Press the jog lever (S703) another time for a second and move the DIRECTION switch (S702) according to the movement of the slider (NRA) will set the PLAY mode (side REV).
Note 1: If the above fails, perform from preset again. Note 2: When using headphones, the timing for move the DIRECTION switch (S702) can be determined from the beep sound.
MAIN Board (Component Side)
PUSH Y/ x r > . FF REW
MAIN Board (Conductor Side)
S703 jog lever
connect to the plunger (PM701)
BP
battery terminal # AF oscillator
TP31 (PH-S) PH701 FWD R STOP r REV S702 (DIRECTION)
+
square wave (sine wave) 100 Hz, 3.5 dB TP10 (GND) connect to the motor (M601)
battery terminal #
battery terminal 3
3
WM-EX921
Slider (NRA)
Rotation system
Rotation system during PLAY.
gear (NR) (FWD : left side/ REV : right side) idler gear (A) (side S) idler gear (A) (side T) gear (REEL) (side S) gear (REEL) (side T) motor pulley
slider (NRA)
cam gear
side F side R center
gear (Y)
clutch assy (F) idler gear (B)
reverse pulley insert flywheel (N) insert flywheel (R)
Rotation system during FF.
Rotation system during REW.
idler gear (A) (side T) gear (REEL) (side T) cam gear
gear (FR) (FF: left side) motor pulley
gear (FR) idler gear (A) (REW: right side) (side S) gear (REEL) (side S) motor pulley cam gear
clutch assy (F) gear (Y)
gear (Y)
clutch assy (F)
reverse pulley insert flywheel (N) insert flywheel (R)
reverse pulley insert flywheel (N) insert flywheel (R)
4
WM-EX921 SECTION 2 GENERAL
A Preparations
Rechargeable Battery A
1 Insert the supplied rechargeable battery NH-14WM (A) into the rechargeable battery compartment with correct polarity. 2 Connect the supplied AC power adaptor to the charging stand, plug in the AC power adaptor to the house current (mains). 3 Place the main unit on the charging stand. The CHARGE lamp will light up. About 30 minutes of charging will charge the battery to last about 3 hours. Full charging takes about 6 hours. The CHARGE lamp will go off when charging is complete. You can charge the battery about 300 times. Note
· Do not use the unit while charging. Remove the unit from the charging stand when using it. If you operate the unit while charging, the battery will not be charged. If you operate the unit while charging, it may cause malfunction. Do not place the unit on the charging stand without the rechargeable battery. Otherwise, it may cause malfunction.
This section is extracted from instruction manual.
Other Tape Operations
To play the next track/succeeding 9 tracks from the beginning (AMS*)
On the remote control: Press FF once/repeatedly during playback. On the main unit: Move the jog lever toward .FF once/repeatedly during playback.
To play the current track/previous 8 tracks from the beginning (AMS*)
On the remote control: Press REW once/repeatedly during playback. On the main unit: Move the jog lever toward >REW once/repeatedly during playback.
* Automatic Music Sensor
Repeating the current track (repeat single track function)
On the remote control: Press Y·x twice during playback ("REP" lights up). On the main unit: Press the jog lever twice during playback.
To stop a single repeat
Press Y·x or the jog lever once.
CHARGE
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 jog lever toward .FF/>REW during playback and release it at the point you want.
When to charge the battery B
B
Charge the battery when "e" flashes in the display.
Note · After the battery is replaced, the setting of the SOUND and MODE buttons will be erased.
Using Other Functions
Adjusting Playback Mode D
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:
B
Playing a Tape C
1 Insert a cassette and if the HOLD function of the remote control is on, slide the HOLD switch in the opposite direction of the arrow to unlock the controls. 2 Press Y(play)·x(stop) on the remote control* and adjust the volume with VOL.
C
REV FWD
Notes on volume control · The VOL switch on the main unit** has three steps. Generally, set it to the center and make fine volume adjustments on the remote control. Set it to the maximum when the recording level is low. If set to AVLS (minimum), AVLS is activated (see "Protecting Your Hearing --AVLS"). · The sound cannot be turned down all the way. * The Y·x button on the remote control has a tactile dot. ** There is a tactile dot beside the VOL switch on the main unit to show the direction to turn up the volume. Note on the cassette holder When opening the cassette holder, make sure the tape is stopped, then slide the OPEN switch. If the cassette holder is opened when the tape is running, the tape may loosen and be damaged.
s v s BL SKIP v d v d BL SKIP
Plug in firmly. Branchez fermement. Fest einstecken. Jog lever Levier Jog Jog-Hebel HOLD REW () FF (+)
·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.
To Switch playback to the other side Stop playback Fast forward* Rewind*
Press Y·x for more than a second during playback Y·x once during playback FF during stop REW during stop
Playing a Tape Recorded with the Dolby* B NR System D
Hold down SOUND until ";" appears in the display. To cancel Dolby B NR, hold down SOUND again until ";" disappears.
Note · You cannot turn on/off the Dolby B NR function during fast-forward or rewind.
Y·x
Hold shutter Cache de verrouillage Schutzschieber
Jog lever Levier Jog Jog-Hebel REW
Play the other side from FF for 2 seconds or more the beginning (Skip during stop Reverse function)
FF
Emphasizing Sound D
1 Press SOUND repeatedly. With each press, the indications change as follows: RV (Sound Revitalizer): emphasizes treble sound MB (Mega Bass): emphasizes bass sound (moderate effect) GRV (Groove): emphasizes bass sound (strong effect) none: normal (no effect)
Notes · If the sound is distorted with the mode "GRV", turn down the volume of the main unit or select other modes. · You cannot change the mode during fast-forward or rewind.
Play the same side from the beginning (Rewind Auto Play function)
REW for 2 seconds or more during stop
* If Y·x on the remote control is pressed during fast forward or rewind, the Walkman switches to playback.
Operation on the main unit
D
You can operate the tape with the jog lever on the main unit. If the jog lever is hidden (i.e., on hold), slide hold shutter in the direction of "V" to release hold. To Play back
HOLD
Jog lever Press once. Press for more than a second during playback. Press once. Move toward .FF once during stop. Move toward >REW once during stop.
Switch playback to the other side
SOUND
Protecting Your Hearing -- AVLS (Automatic Volume Limiter System)
D 1 Set the VOL switch on the main unit to AVLS.
Stop playback Fast forward*
MODE
To cancel the AVLS function
Set the VOL switch of the main unit to the center or maximum.
Rewind*
Hold shutter Cache de verrouillage Schutzschieber
Play the other side from Move and hold toward the beginning (Skip .FF for 2 seconds or Reverse function) more during stop. Play the same side from the beginning (Rewind Auto Play function) Move and hold toward >REW for 2 seconds or more during stop.
Locking the Controls -- HOLD Function D
On the remote control, slide the HOLD switch in the direction of the arrow to lock the controls. On the main unit, close the hold shutter so that the jog lever becomes hidden.
* If the jog lever on the main unit is pressed during fast forward or rewind, the Walkman switches to playback.
5
WM-EX921 SECTION 3 DISASSEMBLY
· This set can be disassembled in the order shown below.
3-1.
DISASSEMBLY FLOW
Set 3-2. Case Section 3-3. Main Board 3-4. Belt (F0) 3-5. Motor, DC (Capstan/Reel) (M601)
3-6. Lid Assy, Cassette
3-7. Ornament (Open) Block Assy
3-8. Holder (FA) Assy
3-9. "Lever (N2) Assy, Pinch", "Lever (R2) Assy, Pinch"
3-10. Head, Magnetic (Playback) (HP901)
Note: Follow the disassembly procedure in the numerical order given.
3-2.
CASE SECTION
S301 cassette assy, lid
Note: On installation "lid assy, cassette" adjust the S301 and knob (vol).
4 Close terminal board assy.
knob (VOL)
5 two screws (M1.4) 6 screw (M1.4)
5 two screws (M1.4)
2 claw
7 case section 3 lid, battery case
1 Open "lid, battery case".
6
WM-EX921
3-3.
MAIN BOARD
1 Remove seven solders of "motor, DC (M601)".
2 screw
2 screw (M1.4) (toothed lock)
S702
3 MAIN board 1 Remove six solders of head flexible board.
2 screw
1 Remove two solders of "solenoid, plunger". 1 Remove four solders of "switch, leaf (S704)".
slider
Note: On installation MAIN board adjust the S702 and slider.
3-4.
BELT (F0)
pulley, motor pulley, reverse
2 terminal board, battery
3 belt (F0)
flywheel (R), insert
belt (F0)
flywheel (N), insert
1 Remove solder of "terminal board, battery".
7
WM-EX921
3-5.
MOTOR, DC (CAPSTAN/REEL) (M601)
1 two screws (M1.4) 2 motor, DC (capstan/reel) (M601)
3-6.
LID ASSY, CASSETTE
4 lid assy, cassette
2 two screws (M1.4)
3 boss
2 screw (M1.4)
1 Open "lid assy, cassette".
8
WM-EX921
3-7.
ORNAMENT (OPEN) BLOCK ASSY
2 claw
1
4 two claws 1
5 ornament (open) block assy 3 boss
3-8.
HOLDER (FA) ASSY
4 screws (M1.4)
5 lever (S) (/M), lock 7 bracket (cassette/910) assy
8 Remove six solders of head flexible board. 2 boss 9 holder (FA) assy
6 boss 3 lever (B) (/M), lock
1 two screws (M1.4)
9
WM-EX921
3-9.
"LEVER (N2) ASSY, PINCH", "LEVER (R2) ASSY, PINCH"
1 claw 2 Remove "lever (R2) assy, pinch" in the direction of the arrow.
3 claw
holder (FA) assy
4 Remove "lever (N2) assy, pinch" in the direction of the arrow.
3-10. HEAD, MAGNETIC (PLAYBACK) (HP901)
4 head, magnetic (playback) (HP901)
1 spring (HDA)
3 two bosses
2
10
WM-EX921 SECTION 4 MECHANICAL ADJUSTMENTS
Precaution 1. Clean the following parts with a denatured-alcohol-moistened swab: playback head pinch roller rubber belts capstan 2. Demagnetize the playback head with a head demagnetizer. (Do not bring the head demagnetizer close to the erase head.) 3. Do not use a magnetized screwdriver for the adjustments. 4. The adjustments should be performed with the rated power supply voltage (1.3 V) unless otherwise noted. Torque Measurement
Mode FWD CQ-102C FWD Back Tension REV CQ-102RC REV Back Tension FF, REW CQ-201B Torque Meter Meter Reading (1.47 2.94 mN·m) 15 25 g·cm (0.22 0.36 oz·inch) (0.029 0.196 mN·m) 0.3 2.0 g·cm (0.004 0.01 oz·inch) (1.47 2.94 mN·m) 15 25 g·cm (0.22 0.36 oz·inch) (0.029 0.196 mN·m) 0.3 2.0 g·cm (0.004 0.01 oz·inch) (more than 3.43 mN·m) more than 35 g·cm (more than 0.5 oz·inch)
SECTION 5 ELECTRICAL ADJUSTMENTS
Precaution 1. Specified voltage : 1.3 V (DC) 2. Switch position VOL/AVLS switch : Center (NOR) 3. Remote control setting HOLD switch : OFF VOL knob : MAX DOLBY NR : OFF SOUND mode : Normal
0 dB=0.775 V
Test tape
Type WS-48A Signal 3 kHz, 0 dB Used for Tape Speed Adjustment
Tape Speed Adjustment Setting:
test tape WS-48A (3 kHz, 0 dB) set frequency counter 32 +
i jack (J301)
Procedure: 1. Playback WS-48A (tape center) in the FWD state. 2. Adjsut RV601 so that the frequency counter reading becomes 3,000 Hz. Specified Values: 2,985 to 3,015 Hz 3. Playback WS-48A (tape center) in the REV state. Check that the frequency counter reading is within 2.0% (approx.60 Hz) of the reading of step 1. Adjustment Location: MAIN Board
RV601
11
WM-EX921
MEMO
12
WM-EX921 SECTION 6 DIAGRAMS
6-1. BLOCK DIAGRAM
RIPPLE FILTER Q309 17
RF OUT
HP901 (PLAYBACK) L-CH FWD R-CH R-CH 1 5 FWD IN-L
AUDIO MASTER AMP IC301 (1/2) PRE OUT-L
BATT B+ 19
VCC
AUDIO MASTER AMP IC301 (2/2) PW IN-L PW NF-L EQ-L
J301
18
BASE
i
(HEADPHONE WITH REMOTE CONTROL) PW OUT-L R-CH
PREAMP REV IN-L
7 R-CH METAL EQ AMP CONTROL Q305
PRE OUT CONTROL Q315
POWER AMP
+
R-CH VOLUME MAX SWITCH Q311 VOLUME MIN SWITCH Q312, 314 R-CH
28 29 30
+
20
R-CH BEEP F701 BATT B+ VCC DATA
R-CH L-CH REV R-CH R-CH METAL CONTROL MTL DRV-R 9
DOLBY NR AMP IC303
MUTING Q317
METAL SWITCH Q306
4 IN-L VCC 14
OUL-L 5
R-CH 32 MAX NOR S301 AVLS VOL MIN DDC B+ 33 BST OUT PW IN-C
POWER AMP
PW OUT-C
REMO 21 GND
BASS BOOST AMP V/I AGC DET
PW SW
DDC B+ B+ SWITCH Q316
R-CH AGC IN 35 S703 (JOG LEVER) PUSH bB/x
F/R SW
M/N SW
R-CH S704 (2/2) (ATS) REVIVE/ GROOVE SWITCHING Q304 S702 (DIRECTION) S704 (1/2) (TAPE DETECT) FWD STOP REV MEGA BASS/ GROOVE SWITCHING Q302
AMS OUT 40
43
41 42
BEEP
44
46
MT SW
12
AMS
BST SW
AMS IN
39
REW FF
X701 32.768kHz
BP1 9
F/R CTL
5
CASSETTE SW
2 3 4
FWD SW CENTER SW REV SW
20
DOLBY CTL
1
AUDIO ATT
7
REVIVE CTL
8
MEGA BASS CTL
39
AMS IN
10
BOOST CTL
12
MUTE CTL
36
BEEP
6
DATA/RMUM
16
KEY IN
28
XT0
29
XT1
MOTOR DIR
MOTOR U MOTOR V MOTOR W
BATT DET
AMP CTL
17 PM CTL
P-SIG
PHOTO CTL
SPEED CTL
CTRL1 CTRL2
PHOTO IN (S)
40 CAPSTAN/REEL MOTOR SERVO IC601 10 MC ENTER
PSIG
41
18
47 46 45
42
44 43
CTRL1 CTRL2
19
37
11
15
35 BATT B+
RESET
PLUNGER DRIVE Q701
MOTOR START
PM701 (PLUNGER)
SYSTEM CONTROLLER IC705
PHOTO REFLECTOR SWITCH & BUFFER Q704
RESET SIGNAL GENERATOR IC704
M601 (CAPSTAN/REEL) U V W
19
P-SIG ENCODER
COMPARATOR
/t
PULSE
PW VC
13 14 15 CAPSTAN/REEL MOTOR START SWITCH Q602
UOUT 34 VOUT 32 WOUT 31 VI
CURRENT AMP
BUFFER
IV
U V W
DDC B+ D702 DC/DC CONVERTER IC701 L701 RECHARGEABLE BATTERY NH-14WM 1.2V 1350mAh
BUFFER
CAPSTAIN/REEL MOTOR CONTROL Q603 (1/2) US 35 VS 36 WS 1 TU TV TW CAPSTAIN/REEL MOTOR CONTROL Q603 (2/2) UT 28 VT 29 WT 30
COMPARATOR
VI1 16 VI2 17 DDC B+ ICI1
POWER
21 U V W
RV601 TAPE SPEED
SOFT CLIP
DECODER
UIN VIN WIN DR CTRL1 CTRL2
4 5 6 9 7 8
ROTATION DETECT SENSOR (S REEL) PH701
CHARGE
COM
CONTROL BLOCK
CTRL1 CTRL2
· R-ch is omitted due to same as L-ch. · SIGNAL PATH : PLAYBACK
CHARGING STAND DC IN 4.5V
+
13
13
WM-EX921
6-2.
NOTE FOR PRINTED WIRING BOARD AND SCHEMATIC DIAGRAMS
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 and 1/4 W or less unless otherwise specified. · % : indicates tolerance. · C : panel designation. Note: The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. · A : B+ Line. · H : adjustment for repair. · Power voltage is dc 1.3V and fed with regulated dc power supply from battery terminal. · Voltages and waveforms are dc with respect to ground in playback mode. no mark : PLAYBACK ( ) : DOLBY NR ON · Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. · Waveforms are taken with a oscilloscope. Voltage variations may be noted due to normal production tolerances. · Circled numbers refer to waveforms. · Signal path. E : PLAYBACK · Abbreviation FR : French model
· Waveforms
1 IC705 wh (CB2) 6 IC601 4 (UIN), 5 (VIN), 6 (WIN)
Note on Printed Wiring Board: · X : parts extracted from the component side. · Y : parts extracted from the conductor side. : Pattern from the side which enables seeing. · (The other layers' patterns are not indicated.) Caution: Pattern face side: (Conductor Side) Parts face side: (Component Side) 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.
1.3 Vp-p
1.3 Vp-p
· Abbreviation FR : French model
61 µs
2 IC705 wl (XT1)
6.6 ms
2.3 Vp-p
30.5 µs
3 IC705 ef (OSC1)
2.3 Vp-p
1.8 µs
4 IC705 rg (MOTOR W), rh (MOTOR V), rj (MOTOR U)
1.3 Vp-p
6.6 ms
5 IC701 5 (LX)
3 Vp-p
3 µs
14
14
WM-EX921
· 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 EQ A EQ B
IC601
LB1994M-TLM
I SOFT PGND FC ICI2 ICI1 CT2 CT1
DET
27 26
25 24
23
IR
22
21
20
36 35
34 BST +
33
32 31
30 29 28 27 26
25 19 M CENTER 18 GND 17 VI2 24 RF IN 23 PW GND 22 OUT B PW B 21 OUT C VI BUFFER COMPARATOR 16 VI1
AGC DET
UT 28 VT 29 WT 30
C-AMP SW 37 MT TC 38 BEEP 39 AMS OUT 40 BEEP
PW C
MT SW PW SW BST SW F/R SW PRE SW M/N SW
41 42 43 44 45 46
SWITCH
PRE A
+
PRE B MIX
+ +
PRE GND 47 VREF IN 48 VREF MTL DRV
1 2 3
IN A-F IN B-F VREF OUT
4
IN B-R
5
IN A-R
6
PRE NF-A
7
PRE OUT A
8
MTL DRV A
9
MTL DRV B
PRE OUT B
PRE NF-B
AMS IN
U IN V IN W IN
CTRL1
WS
MC
IC303
V+
NJM2185AV-TE2
OUTA VEXT INA DETA DCA SW
IC701
XC6383C251ML
CE 1
CHIP ENABLE VDD VLx LIMITER 5 LX
14
13
12
11
10
9
8
V OUT 2
G2 BIAS CIRCUIT + SUM WEIGHT + G1 V/I
V REF + 2 STEP PFM CONTROL OSC 100/180 kHz
BUFFER 4 VSS
NC 3 +
GM A-CH BLOCK
B-CH BLOCK: SAME AS A-CH.
1
2
3
4
5
6
7
IREF
OUTB
VREF
DETB
GND
INB
DCB
15
15
CTRL2
VCC
DIR
+ +
15 IV BUFFER 14 VC
PW A 20 OUT A 19 VCC RIPPLE FILTER
P-SIG
COMPARATOR
D/DT
PULSE
13 PW
18 BASE 17 RF OUT 16 GND 15 AMS DET 14 AMS MIX 13 AMS SW
12 CI
POWER W OUT V OUT NC U OUT US VS 31 32 33 34 35 36 CURRENT AMP
11 Vref
COMPARATOR
SOFT CLIP 10 P SIG CTRL BLOCK DECODER PW·SW
10 11
12
1
2
3
4 5 6
7
8
9
WM-EX921
6-3.
· Semiconductor Location
Ref. No. D701 D702 IC301 IC303 IC601 IC701 IC704 IC705 PH701 Q305 Q309 Q311 Q315 Q316 Q602 Q603 Q701 Q704 Location F-3 B-6 B-2 E-3 D-7 B-6 E-4 D-4 D-6 B-2 C-2 E-2 D-3 D-3 E-6 C-7 F-3 E-5
PRINTED WIRING BOARD MAIN Board (Component Side)
:Uses unleaded solder.
1
2
3
4
5
6
7
8
A
MAIN BOARD
(COMPONENT SIDE)
S301 AVLS VOL 1 3 12 13 1 48 S702 (DIRECTION) FWD t STOP t REV
5 4
IC701
B
MIN r NOR r MAX
IC301
25 36
24
37
C
S703 (JOG LEVER) REW S703 PUSH bB/x FF 3 1 4 6 24 4 6 3 COM LCH 1 25 36 37 4 3 1 2 13 12 REW
IC705
36 1 48 1
28 27
D
FF
IC601 IC704
9 10 18 19
J301
i
HEADPHONE WITH REMOTE CONTROL
IC303
11 1-682-489(11)
E
GND
RCH X701
F
REMO DATA VCC
16
16
WM-EX921
6-4. PRINTED WIRING BOARD MAIN Board (Conductor Side) :Uses unleaded solder.
1
2
3
4
5
HP901 (PLAYBACK)
6
7
· Semiconductor Location
Ref. No. Q302 Q304 Q306 Q312 Q314 Q317 Location C-5 D-6 B-7 F-7 F-7 E-7
A MAIN BOARD
(CONDUCTOR SIDE)
L-ch REV R-ch
6
5
4
1 2 3 4 5 6
L-ch
B
(CHASSIS)
TP10 (GND)
FWD R-ch
M601 CAPSTAN/ REEL
C
TV TW
5
COM TU
3
1 2
D
TP31 (PH-S)
5 3
1 2
V U W (FR)
(EXCEPT FR) (FR)
E
RECHARGEABLE BATTERY NH-14WM 1.2V 1350mAh PM701 (PLUNGER)
5 1 3
CHARGING STAND
3 2 1
1 2
F
11 DC IN 4.5V
+
1-682-489-
(11)
S704
S704 (2/2) (ATS)
S704 (1/2) (TAPE DETECT)
17
17
WM-EX921
6-5.
SCHEMATIC DIAGRAM MAIN Board (1/2)
· See page 14 for Waveforms.
· See page 15 for IC Block Diagrams.
(Page 19)
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
18
18
WM-EX921
6-6.
SCHEMATIC DIAGRAM MAIN Board (2/2)
· See page 15 for IC Block Diagrams.
(Page 18)
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
19
19
WM-EX921
6-7. IC PIN FUNCTION DESCRIPTION
· IC705 ML63514-025TBZ060 (SYSTEM CONTROLLER) 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 Pin Name AUDIO ATT FWD SW CENTER SW REV SW CASSETTE SW DATA/RMUM REVIVE CTL MEGA BASS CTL F/R CTL BOOST CTL AMP CTL MUTE CTL SET STOP 1 SET STOP 2 BATT DET KEY IN PM CTL SPEED CTL PHOTO CTL DOLBY CTL VDD1 VSS VDD VDDH CB1, CB2 VDDL XT0 XT1 TST1B, TEST2B NC OSC0 OSC1 RESET BEEP PHOTO IN (S) NC AMS IN I/O O I I I I I/O O O O O O O I I I I O O O O -- -- -- -- -- -- I O I -- I O I O I O I Audio attenuate control signal output Description It attenuates, when cue/review "H": attenuate
Pin No. 40 41 42 43, 44 45 46 47 48
Pin Name P-SIG MOTOR START MOTOR DIR CTRL 1, CTRL 2 MOTOR W MOTOR V MOTOR U NC
I/O I O O O O O O O
Description P-SIG signal input from the capstan/reel motor driver IC (IC601) Motor restart control signal output to the capstan/reel motor driver IC (IC601) "L": restart the motor Motor direction control signal output to the capstan/reel motor driver IC (IC601) "L": clockwise, "H": counterclockwise Mode selection signal output to the capstan/reel motor driver IC (IC601) (W phase) Motor control signal output to the capstan/reel motor driver IC (IC601) (W phase) Motor control signal output to the capstan/reel motor driver IC (IC601) (V phase) Motor control signal output to the capstan/reel motor driver IC (IC601) (U phase) Not used (open)
Tape direction switch (S702) input terminal "L": forward position Tape direction switch (S702) input terminal "L": center position Tape direction switch (S702) input terminal "L": reverse position Cassette tape detect switch (S704-1) input terminal "L": cassette detected, "H": no cassette Communication serial data output to the headphone with remote control, and connection detect signal input of the remote control Emphasizing sound control signal output to the TA2123AF (IC301) "L": normal/mega bass/groove, "H": revive Emphasizing sound control signal output to the TA2123AF (IC301) "L": normal/groove, "H": mega bass/revive Forward/reverse selection signal output to the TA2123AF (IC301) "L": forward direction, "H": reverse direction Bass boost control signal output to the TA2123AF (IC301) "L": off, "H": on Also, this is used as control signal output for power on/off to the TA2123AF (IC301) and DC/DC converter (IC701) "H": power on Audio mute control signal output to the TA2123AF (IC301) "L": mute on Voltage input terminal for set stop Reference voltage input terminal for set stop Battery voltage detection signal input (A/D input) Key input from the main unit or headphone with remote control (A/D input) Plunger drive signal output terminal "L": plunger on Motor speed control signal output to the capstan/reel motor driver IC (IC601) "L": normal speed, "H": 1/2 speed Control signal output to the capstan/reel motor rotation detect circuit "L": rotation detect circuit on Power on/off control signal output to the Dolby NR circuit "L": Dolby NR on Power supply terminal (+2.5V) (for external interface) Ground terminal Power supply terminal (+1.5V) Power supply terminal (+2.5V) (for back-up boost) Connected to capacitor for the boost power supply Power supply terminal (for internal logic) Main system clock input terminal (32.768kHz MHz) Main system clock output terminal (32.768kHz MHz) Test input terminal Not used (open) Connected to resistor for the high speed CR oscillator (550 kHz) Connected to resistor for the high speed CR oscillator (550 kHz) System reset signal input from the reset signal generator (IC704) "L": reset "L" is input for several 100 msec after power on, then it changes to "H" Beep sound signal output to the TA2123AF (IC301) Rotation detect signal input of the capstan/reel motor (M601) It detects rotation of the idler gear (A) (side S) Not used (open) Whether a music is present or not from TA2123AF (IC301) is detected at auto music sensor "L": music is present, "H": music is not present Fixed at "H" in this set
20
20
WM-EX921 SECTION 7 EXPLODED VIEWS
NOTE: · -XX and -X mean standardized parts, so they may have some difference from the original one. · Color Indication of Appearance Parts Example: KNOB, BALANCE (WHITE) . . . (RED) Parts Color Cabinet's Color · Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. · The mechanical parts with no reference number in the exploded views are not supplied. · Accessories are given in the last of the electrical parts list. · Abbreviation CH : Chinese model EE : East European model FR : French model JE : Tourist model KR : Korean model
7-1. CASSETTE LID ASSY SECTION
4
3
4
case section
2
6
4
7
5 4
main board section
1
Ref. No. 1 1 1 2 3 3 3 3
Part No. 3-233-770-01 3-233-770-11 3-233-770-21 3-029-220-11 X-3380-991-1
Description
Remark
Ref. No. 3 3 4 5 6 6 6 7
Part No. X-3381-248-1 X-3381-249-1 3-225-996-11 3-225-996-05 3-221-628-13
Description CASSETTE ASSY, LID (BLUE) (KR) CASSETTE ASSY, LID (RED) (KR) SCREW (M1.4) (EG), PRECISION PAN SCREW (M1.4) (EG), PRECISION PAN ORNAMENT (OPEN) (SILVER)
Remark
LID, BATTERY CASE (SILVER) LID, BATTERY CASE (BLUE) LID, BATTERY CASE (RED) SPRING, TENSION LID ASSY, CASSETTE (SILVER) (EXCEPT KR)
X-3380-992-1 LID ASSY, CASSETTE (BLUE) (EXCEPT KR) X-3380-993-1 LID ASSY, CASSETTE (RED) (EXCEPT KR) X-3381-247-1 CASSETTE ASSY, LID (SILVER) (KR)
3-221-628-21 ORNAMENT (OPEN) (BLUE) 3-221-628-31 ORNAMENT (OPEN) (RED) 3-221-629-01 KNOB (OPEN)
21
WM-EX921
7-2. CASE SECTION
59 58 60 57 58
52
56
not supplied
61 54 53 52 55
51
Ref. No. 51 52 53 54 55 56 57 57
Part No. 3-233-765-01 3-237-316-01 3-233-767-01 3-233-766-01 3-233-768-01
Description CAP SCREW SHUTTER (B) SHUTTER (A) SPRING (SHUTTER)
Remark
Ref. No. 57 58 59 59 59 60 61
Part No. 3-233-761-21 3-704-197-32 3-233-773-01 3-233-773-11 3-233-773-21
Description CASE (RED) SCREW (M1.4X3.0) KNOB (VOL) (SILVER) KNOB (VOL) (BLUE) KNOB (VOL) (RED)
Remark
3-233-764-01 BASE (SHUTTER) 3-233-761-01 CASE (SILVER) 3-233-761-11 CASE (BLUE)
3-233-769-01 ORNAMENT (CASE) 3-235-965-01 CASE, WINDOW
22
WM-EX921
7-3. MAIN BOARD SECTION
111 112
110
MT-WMEX921-162
S704
113
109 109 106 107 108
not supplied
114
103
103
115
101
104 102 105 118
116 117 102
Ref. No. 101 102 103 * 104 * 104 105 106 107 108 109 110
Part No. 3-038-056-01 3-375-114-41 3-224-837-01 A-3021-534-A A-3021-536-A 3-224-466-01 3-233-772-01 3-032-323-01 X-3377-717-2 3-225-996-02
Description
Remark
Ref. No. 110 110 111 112 113 114 115 116 117 118 S704
Part No. 3-236-616-11 3-236-616-21 3-365-630-41 X-3379-431-1 3-038-054-01 3-704-197-01 3-029-213-01 3-345-648-71 X-3377-726-2 3-031-460-01
Description COVER, MD (AEP, EE, FR) COVER, MD (CH, KR) SCREW (M1.4) BRACKET (CASSETTE/910) ASSY LEVER (B) (/M), LOCK SCREW (M1.4), SPECIAL HEAD TERMINAL BOARD, BATTERY SCREW (M1.4), TOOTHED LOCK TERMINAL BOARD ASSY (/M) SHEET (BT)
Remark
TERMINAL BOARD (MINUS) (/M) SCREW SHEET (ATS) MAIN BOARD, COMPLETE (EXCEPT FR) MAIN BOARD, COMPLETE (FR) SHEET (PC BOARD) KNOB (JOG) PAPER (A), SHIELD BRACKET ASSY (/M) SCREW (M1.4) (EG), PRECISION PAN
3-236-616-01 COVER, MD (JE)
1-762-553-11 SWITCH, LEAF (TAPE DETECT, ATS)
23
WM-EX921
7-4. MECHANISM DECK SECTION-1 (MT-WMEX921-162)
PM701
157 160 158 156 159 163 161 155 164 158 162 163 162
154 153 152 152 151 151
mechanism deck section-2
Ref. No. 151 152 153 154 155 156 157 158
Part No. 3-010-274-02 3-010-954-01 X-3376-813-1 3-932-724-21 3-029-282-12
Description TABLE, REEL SPRING (BT), COMPRESSION CLUTCH ASSY (F) WASHER GEAR (Y)
Remark
Ref. No. 159 160 161 162 163 164 PM701
Part No. 3-029-281-01 3-040-897-04 3-029-273-01 3-007-433-12 3-029-283-02
Description GEAR, IDLER (B) SPRING (TGA), TORSION GEAR (FR) SHEET (N), REFLECTION GEAR, IDLER (A)
Remark
3-029-285-02 GEAR, CAM 3-029-284-13 LEVER, TRIGGER 3-010-273-02 GEAR (REEL)
3-029-286-01 GEAR (NR) 1-454-674-32 SOLENOID, PLUNGER
24
WM-EX921
7-5. MECHANISM DECK SECTION-2 (MT-WMEX921-162)
207
210
206
M601
209 205
211 208
212
204 203
213
202 201
mechanism deck section-3
Ref. No. 201 202 203 204 205 206 207
Part No. 3-029-276-02 3-029-289-01 3-029-275-01 3-029-278-01 3-386-694-01
Description WASHER (STOPPER R) WASHER WASHER (STOPPER N) WASHER WASHER
Remark
Ref. No. 208 209 210 211 212 213 M601
Part No. 3-007-428-01 3-029-268-21 3-029-765-01 3-029-883-01 X-3377-584-5
Description WASHER (R) FLYWHEEL (R), INSERT SCREW (M1.4), TOOTHED LOCK RETAINER (F1), MOTOR CHASSIS ASSY (FA)
Remark
3-029-306-21 FLYWHEEL (N), INSERT 3-221-357-01 BELT (F0)
3-029-288-01 PULLEY, REVERSE 1-763-559-12 MOTOR, DC (CAPSTAN/REEL) (WITH PULLEY)
25
WM-EX921
7-6. MECHANISM DECK SECTION-3 (MT-WMEX921-162)
252 253
HP901
254 255
251
Ref. No. 251 252 253
Part No.
Description
Remark
Ref. No. 254 255 HP901
Part No.
Description
Remark
X-3377-589-1 HOLDER (FA) ASSY 3-033-757-01 SHEET (H) X-3377-994-2 LEVER (N2) ASSY, PINCH
3-046-789-01 SPRING (HDA) X-3377-995-2 LEVER (R2) ASSY, PINCH 1-500-639-22 HEAD, MAGNETIC (PLAYBACK)
26
WM-EX921 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 and -X mean standardized parts, so they may have some difference from the original one. · RESISTORS All resistors are in ohms. METAL: Metal-film resistor. METAL OXIDE: Metal oxide-film resistor. F: nonflammable · Items marked "*" are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. · SEMICONDUCTORS In each case, u: µ, for example: uA. . : µA. . uPA. . : µPA. . uPB. . : µPB. . uPC. . : µPC. . uPD. . : µPD. . · CAPACITORS uF: µF · COILS uH: µH
MAIN
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. When indicating parts by reference number, please include the board. · Abbreviation CH : Chinese model EE : East European model FR : French model JE : Tourist model KR : Korean model
Ref. No. * *
Part No.
Description
Remark
Ref. No. C324 C325 C326 C327 C328 C329 C601 C602 C603 C604 C605 C606 C607 C608 C609 C610 C611 C612 C701 C703 C704 C705 C706 C707 C708 C709 C710
Part No.
Description 20% 10% 20% 10% 20% 10%
Remark 2.5V 16V 4V 50V 4V 10V 6.3V 10V 10V 10V 6.3V 10V 10V 2.5V 16V 50V 50V 10V 6.3V 10V 10V 50V 10V 10V 6.3V 10V 10V
A-3021-534-A MAIN BOARD, COMPLETE (EXCEPT FR) A-3021-536-A MAIN BOARD, COMPLETE (FR) ********************* 3-032-323-01 PAPER (A), SHIELD < CAPACITOR > C101 C102 C103 C105 C107 C108 C109 C111 C112 C113 C201 C202 C203 C205 C207 C208 C209 C211 C212 C213 C301 C302 C303 C304 C306 C307 C308 C309 C310 C311 C312 C313 C316 C319 C321 C322 C323 1-107-520-11 1-107-819-11 1-107-819-11 1-107-819-11 1-115-156-11 1-115-156-11 1-115-156-11 1-115-156-11 1-117-863-11 1-115-467-11 1-107-520-11 1-107-819-11 1-107-819-11 1-107-819-11 1-115-156-11 1-115-156-11 1-115-156-11 1-115-156-11 1-117-863-11 1-115-467-11 1-113-600-11 1-125-926-11 1-115-156-11 1-125-841-11 1-107-820-11 1-113-600-11 1-164-505-11 1-125-837-11 1-115-467-11 1-165-112-11 1-165-128-11 1-164-937-11 1-107-820-11 1-164-874-11 1-164-937-11 TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP TANTALUM CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 33uF 0.022uF 0.022uF 0.022uF 1uF 1uF 1uF 1uF 0.47uF 0.22uF 33uF 0.022uF 0.022uF 0.022uF 1uF 1uF 1uF 1uF 0.47uF 0.22uF 2.2uF 4.7uF 1uF 22uF 0.1uF 2.2uF 2.2uF 1uF 0.22uF 0.33uF 0.22uF 0.001uF 0.1uF 100PF 0.001uF 20% 10% 10% 10% 2.5V 16V 16V 16V 10V 10V 10V 10V 6.3V 10V 2.5V 16V 16V 16V 10V 10V 10V 10V 6.3V 10V 6.3V 6.3V 10V 4V 16V 6.3V 16V 6.3V 10V 16V 16V 50V 16V 50V 50V 6.3V 6.3V
1-125-976-11 TANTALUM CHIP 150uF 1-107-819-11 CERAMIC CHIP 0.022uF 1-125-841-11 TANTALUM CHIP 22uF 1-164-937-11 1-135-201-11 1-115-156-11 1-125-837-11 1-115-156-11 1-115-156-11 1-115-156-11 1-117-863-11 1-119-923-11 1-119-923-11 1-119-663-11 1-107-819-11 1-127-671-11 1-164-937-11 1-135-149-21 1-135-259-11 1-115-156-11 1-115-156-11 1-164-850-11 1-115-156-11 1-125-777-11 1-125-838-11 1-115-156-11 1-115-156-11 CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP TANTALUM CHIP TANTALUM CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP CERAMIC CHIP 0.001uF 10uF 1uF 1uF 1uF 1uF 1uF 0.47uF 0.047uF 0.047uF 47uF 0.022uF 10000PF 0.001uF 2.2uF 10uF 1uF 1uF 10PF 1uF 0.1uF 2.2uF 1uF 1uF
10% 10% 10% 20% 10% 5% 10% 20% 20%
10% 10% 20% 10% 10% 10%
0.5PF
10% 10% 20% 20% 20%
10% 10%
< COMPOSITION CIRCUIT BLOCK > CB301 1-127-575-21 CAP, CHIP CERAMIC < DIODE > 470PF SL
20% 10% 10%
D701 D702
8-719-404-50 DIODE MA111-TX 8-719-072-70 DIODE MA2ZD14001S0 < FUSE >
0 F701
1-576-439-21 FUSE (SMD) 0.25A 125V < FERRITE BEAD >
10% 5% 10% 20% 20%
1-125-926-11 TANTALUM CHIP 4.7uF 1-109-935-11 TANTALUM CHIP 4.7uF
FB701 FB702 FB703
1-414-760-21 FERRITE BEAD 1-414-760-21 FERRITE BEAD (EXCEPT FR) 1-414-760-21 FERRITE BEAD (EXCEPT FR)
27
WM-EX921 MAIN
Ref. No. Part No. Description < IC > IC301 IC303 IC601 IC701 IC704 IC705 8-759-579-12 8-759-488-80 8-759-553-51 8-759-553-28 8-759-572-21 IC IC IC IC IC TA2123AF (EL) NJM2185AV-TE2 LB1994M-TLM XC6383C251ML S-80808ANNP-E7Y-T2 Remark Ref. No. R115 R116 R117 R150 R201 R202 R203 R204 R205 R207 R208 R209 R211 R211 < PHOTO REFLECTOR > R212 PH701 8-749-016-61 PHOTO REFLECTOR NJL5197K-W-F20 (TE1) R213 < TRANSISTOR > R213 Q302 Q304 Q305 Q306 Q309 Q311 Q312 Q314 Q315 Q316 Q317 Q602 Q603 Q701 Q704 8-729-426-36 8-729-426-36 8-729-038-06 8-729-037-63 8-729-053-70 8-729-038-06 8-729-230-63 8-729-230-63 8-729-038-06 8-729-046-89 8-729-426-36 8-729-420-24 8-729-039-36 8-729-046-89 8-729-420-50 TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR FET TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR TRANSISTOR < RESISTOR > R101 R102 R103 R104 R105 R107 R108 R109 R111 R111 1-218-967-11 1-218-943-11 1-218-977-11 1-218-963-11 1-218-963-11 1-218-953-11 1-218-969-11 1-244-161-11 1-218-953-11 RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP 15K 150 100K 6.8K 6.8K 1K 22K 2.2 1K 15K 5% 5% 5% 5% 5% 5% 5% 5% 5% 1/16W 1/16W 1/16W 1/16W 1/16W XP1215-TXE XP1215-TXE HN1K02FU (TE85L) UN9115J- (TX).SO 2SA202800LS0 HN1K02FU (TE85L) 2SD1819A-QRS-TX 2SD1819A-QRS-TX HN1K02FU (TE85L) 2SB970-S (TX).S0 XP1215-TXE 2SB1218A-QRS-TX MDC06TR 2SB970-S (TX).S0 UN5215- (TX) R214 R215 R215 1-218-957-11 RES-CHIP 1-218-989-11 RES-CHIP 1-218-957-11 RES-CHIP 1-218-961-11 RES-CHIP 2.2K 1M 2.2K 4.7K 5% 5% 5% 5% 1-218-953-11 RES-CHIP 1K 5% 1/16W (EXCEPT FR) 1/16W (FR) 1/16W 1/16W (EXCEPT FR) 1/16W (FR) 1/16W 1/16W 1/16W (FR) 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1-218-973-11 RES-CHIP 47K Part No. Description 4.7K 47K 470 100 15K 150 100K 6.8K 6.8K 1K 22K 2.2 1K 15K 5% 5% 0.5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% Remark 1/16W (FR) 1/16W 1/16W 1/16W (FR) 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1-218-961-11 RES-CHIP 1-218-973-11 RES-CHIP 1-208-675-11 METAL CHIP 1-218-941-11 RES-CHIP 1-218-967-11 RES-CHIP 1-218-943-11 1-218-977-11 1-218-963-11 1-218-963-11 1-218-953-11 RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP
6-800-620-01 IC ML63514-025TBZ060 < JACK >
J301
1-779-867-81 JACK (i (HEADPHONE WITH REMOTE CONTROL)) < COIL >
1-218-969-11 RES-CHIP 1-244-161-11 RES-CHIP 1-218-953-11 RES-CHIP 1-218-967-11 RES-CHIP
L701
1-412-032-11 INDUCTOR CHIP 100uH
1/16W 1/16W 1/16W (EXCEPT FR) 5% 1/16W (FR) 5% 1/16W
R216 R217 R250 R301 R302 R303 R305 R306 R308 R309 R310 R312 R313 R314 R316 R317 R318 R319 R320 R600 R601 R602 R603 R604 R605 R606 R607 R608 R609 R610
1-218-973-11 RES-CHIP 1-208-675-11 METAL CHIP 1-218-941-11 RES-CHIP 1-218-981-11 RES-CHIP 1-218-955-11 RES-CHIP 1-218-985-11 1-218-985-11 1-218-989-11 1-220-803-11 1-218-971-11 1-218-961-11 1-218-969-11 1-208-939-11 1-208-927-11 1-218-985-11 1-218-985-11 1-218-941-11 1-218-969-11 1-218-985-11 1-218-969-11 1-218-973-11 1-218-973-11 1-218-969-11 1-218-977-11 1-218-985-11 1-218-981-11 1-218-985-11 1-218-977-11 1-218-965-11 1-218-977-11 RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP
47K 470 100 220K 1.5K 470K 470K 1M 4.7 33K 4.7K 22K 150K 47K 470K 470K 100 22K 470K 22K 47K 47K 22K 100K 470K 220K 470K 100K 10K 100K
5% 0.5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 0.5% 0.5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5%
1-218-967-11 RES-CHIP
1/16W 1/16W 1/16W 1/16W (EXCEPT FR) 5% 1/16W (FR) 1/16W 1/16W (EXCEPT FR) 5% 1/16W (FR) 5% 1/16W 5% 1/16W (EXCEPT FR) 5% 5%
R112 R113 R113 R114 R115
1-218-973-11 RES-CHIP 1-218-953-11 RES-CHIP 1-218-957-11 RES-CHIP 1-218-989-11 RES-CHIP 1-218-957-11 RES-CHIP
47K 1K 2.2K 1M 2.2K
28
WM-EX921 MAIN
Ref. No. R611 R612 R613 R614 R615 R701 R702 R705 R706 R707 R708 R709 R710 R711 R712 R713 R716 R717 R718 R719 R720 R721 R722 R723 R724 R725 R727 R728 R729 R731 R732 R733 R734 R735 R736 R737 Part No. 1-218-983-11 1-218-989-11 1-218-989-11 1-218-977-11 1-218-981-11 1-218-937-11 1-218-941-11 1-208-927-11 1-208-715-11 1-208-943-11 1-218-985-11 1-218-977-11 1-218-985-11 1-218-973-11 1-218-955-11 1-218-987-11 1-208-935-11 1-208-707-11 1-208-675-11 1-208-687-11 1-208-683-11 1-208-699-11 1-208-683-11 1-208-703-11 1-208-687-11 1-218-953-11 1-218-985-11 1-218-985-11 1-218-985-11 1-218-989-11 1-218-985-11 1-218-985-11 1-218-985-11 1-208-943-11 1-208-935-11 Description RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP RES-CHIP RES-CHIP RES-CHIP RES-CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP METAL CHIP 330K 1M 1M 100K 220K 47 100 47K 22K 220K 470K 100K 470K 47K 1.5K 680K 100K 10K 470 1.5K 1K 4.7K 1K 6.8K 1.5K 1K 470K 470K 470K 1M 470K 470K 470K 220K 100K 100K 5% 5% 5% 5% 5% 5% 5% 0.5% 0.5% 0.5% 5% 5% 5% 5% 5% 5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 5% 5% 5% 5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% 0.5% Remark 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W 1/16W Ref. No. Part No. Description ACCESSORIES ************ 0 0 0 0 0 1-475-622-21 1-476-716-11 1-476-739-11 1-476-845-11 1-569-007-11 1-756-036-11 1-756-120-12 1-756-231-11 3-008-521-01 3-220-749-01 ADAPTOR, AC (AC-E455) (CH) ADAPTOR, AC (AC-E455) (JE) ADAPTOR, AC (AC-E455) (KR) ADAPTOR, AC (AC-ES455) (AEP, EE, FR) ADAPTOR, CONVERSION 2P (JE) BATTERY, NICKEL HYDROGEN (EXCEPT JE) BATTERY, NICKEL HYDROGEN (JE) STAND, CHARGER CASE, BATTERY CHARGE CASE, CARRYING Remark
0
3-234-048-01 MANUAL, INSTRUCTION (JAPANESE) (JE) 3-234-048-11 MANUAL, INSTRUCTION (ENGLISH, SIMPLIFIED CHINESE, KOREAN) (CH, JE, KR) 3-234-048-21 MANUAL, INSTRUCTION (ENGLISH, FRENCH, GERMAN) (AEP, FR) 3-234-048-31 MANUAL, INSTRUCTION (SPANISH, PORTUGUESE, ITALIAN) (AEP) 3-234-048-41 MANUAL, INSTRUCTION (DUTCH, SWEDISH, FINNISH) (AEP) 3-234-048-51 MANUAL, INSTRUCTION (ENGLISH, POLISH, RUSSIAN) (EE) 3-234-048-61 MANUAL, INSTRUCTION (HUNGARIAN, CZECH, SLOVAKIAN) (EE) 8-953-811-91 RECEIVER, EAR MDR-E803SP A-3052-977-A REMOTE CONTROL ASSY (RMWME23RL)
1-208-935-11 METAL CHIP
< VARIABLE RESISTOR > RV601 1-223-325-21 RES, ADJ, METAL GLAZE 100K < SWITCH > S301 S702 S703 1-692-605-11 SWITCH, SLIDE (VOL, AVLS) 1-771-475-21 SWITCH, SLIDE (DIRECTION) 1-771-816-21 SWITCH, LEVER (SLIDE) (JOG LEVER) < VIBRATOR > X701 1-767-386-21 VIBRATOR, CRYSTAL (32.768kHz) *********************************************************** MISCELLANEOUS ************** HP901 1-500-639-22 HEAD, MAGNETIC (PLAYBACK) M601 1-763-559-12 MOTOR, DC (CAPSTAN/REEL) (WITH PULLEY) PM701 1-454-674-32 SOLENOID, PLUNGER S704 1-762-553-11 SWITCH, LEAF (TAPE DETECT, ATS) ************************************************************
The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.
29
WM-EX921
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 Description of Revision New