TC-WE425/WE525/ WR681

SERVICE MANUAL

US Model

TC-WE425/WR681

Canadian Model

TC-WE425

AEP Model

TC-WE525/WR681

UK Model

TC-WE525

E Model Australian Model

Photo: TC-WE425

Chinese Model
Dolby noise reduction extension manufactured under license from Dolby Laboratories Licensing Corporation. HX Pro originated by Bang & Olufsen. DOLBY, the double-D symbol a and HX PRO are trademarks of Dolby Laboratories Licensing Corporation.
Model Name Using Similar Mechanism Tape Transport DECK A Mechanism Type DECK B
NEW TCM-230ASR1 TCM-230ASR2

SPECIFICATIONS

System
Recording system 4-track 2-channel stereo Fast-winding time (approx.) 100 sec. (with Sony C-60 cassette) Bias AC bias Signal-to-noise ratio (at peak level and weighted with Dolby NR off) Type I tape, Sony Type I (NORMAL): 55 dB Type II tape, Sony Type II (HIGH): 57 dB Type IV tape, Sony Type IV (METAL): 58 dB S/N ratio improvement (approximate values) With Dolby B NR on: 5 dB at 1 kHz, 10 dB at 5 kHz With Dolby C NR on: 15 dB at 500 Hz, 20 dB at 1 kHz Harmonic distortion 0.4% (with Type I tape, Sony Type I (NORMAL): 160 nWb/m 315 Hz, 3rd H.D.) 1.8% (with Type IV tape, Sony Type IV (METAL): 250 nWb/m 315 Hz, 3rd H.D.) Type II tape, Sony Type II (HIGH) Type IV tape, Sony Type IV (METAL) 30-17,000 Hz (3 dB, IEC), 20-18,000 Hz (6 dB) 30-19,000 Hz (3 dB, IEC), 20-20,000 Hz (6 dB), Frequency response (Dolby NR off) Tape type Type I tape, Sony Type I (NORMAL) 30-16,000 Hz (3 dB, IEC), 20-17,000 Hz (6 dB)
Wow and flutter 0.15% W. Peak (IEC) 0.1% W. RMS (NAB) 0.2% W. Peak (DIN)

Continued on next page

STEREO CASSETTE DECK

MICROFILM

Inputs
Line inputs (phono jacks) Sensitivity : 0.16 V Input impedance : 47 kilohms

SAFETY CHECK-OUT

After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The limit indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A)

Outputs

Line outputs (phono jacks) Rated output level : 0.5 V at a load impedance of 47 kilohms Load impedance : Over 10 kilohms Headphones (stereo phono jack) (TC-WE425/WE525 only) Output level : 0.25 mW at a load impedance of 32 ohms

General

Power requirements Where purchased US, Canadian AEP, UK, Chinese Australian E, Singapore, Malaysia Power requirements 120 V AC, 60 Hz 220 - 230 V AC, 50/60 Hz 240 V AC, 50/60 Hz 120/220/230 - 240 V AC, 50/60 Hz
Power consumption 18 W Dimensions (approx.) (w/h/d) 290 mm (w/h/d) (3/3/8 in.) including projecting parts and controls Mass (approx.) 4 kg (8 lbs 13 oz)
To Exposed Metal Parts on Set

Supplied accessories

Audio connecting cords (2 phono plugs - 2 phono plugs) (2) CONTROL A1 cord (supplied for Canadian models only) (1) Design and specifications are subject to change without notice.

AC voltmeter (0.75V)

Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.
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.
ATTENTION AU COMPOSANT AYANT RAPPORT LA SCURIT!! LES COMPOSANTS IDENTIFIS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHMATIQUES ET LA LISTE DES PICES SONT CRITIQUES POUR LA SCURIT DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PICES SONY DONT LES NUMROS SONT DONNS DANS CE MANUEL OU DANS LES SUPPLMENTS PUBLIS PAR SONY.

MODEL IDENTIFICATION

Back panel
TABLE OF CONTENTS 1. GENERAL
1-1. Location of Controls... 4

Part No.

2. DISASSEMBLY
2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. Case... 5 Front Panel Assy... 5 Cassette Lid Assy (Deck A/B).. 6 Mechanism Deck Assy (Deck A/B). 6 Leaf SW (A) board (Deck A), Leaf SW (B) board (Deck B)... 7 Pinch Lever (FWD)/(REV) Assy (Deck A/B). 8 Flywheel (FWD)/(REV) Assy (Deck A/B).. 8 Mechanical Block Assy (Deck A/B).. 9 Head Relay (PB) Board (Deck A), Head Relay (REC) Board (Deck B). 9
Part No. 3-021-244-0 3-021-244-1 3-021-244-2 3-021-244-3 3-021-244-4 3-021-244-5 3-021-244-6 3-021-245-0 3-021-245-1 3-021-245-2 3-021-245-3 3-021-245-4
Model TC-WE425 : US model TC-WE425 : CND model TC-WE525 : AEP model TC-WE525 : UK model TC-WE425 : AUS model TC-WE425 : SP, MY model TC-WE425 : CH model TC-WR681 : US model TC-WR681 : AEP model TC-WR681 : E model TC-WR681 : AUS model TC-WR681 : SP model
3. MECHANICAL ADJUSTMENTS. 10 4. ELECTRICAL ADJUSTMENTS.. 10 5. DIAGRAMS
5-1. IC Pin Description... 14 5-2. Circuit Boards Location.. 16 5-3. Printed Wiring Boards Main Section.. 17 5-4. Schematic Diagram Main Section (1/3). 19 5-5. Schematic Diagram Main Section (2/3). 21 5-6. Schematic Diagram Main Section (3/3). 23 5-7. Printed Wiring Boards Panel Section.. 25 5-8. Schematic Diagram Panel Section.. 27 5-9. Printed Wiring Boards Power Section.. 29 5-10. Schematic Diagram Power Section. 31 5-11. Printed Wiring Board Deck A Section.. 32 5-12. Schematic Diagram Deck A Section.. 32 5-13. Printed Wiring Board Deck B Section. 33 5-14. Schematic Diagram Deck B Section.. 33
Abbreviation CND : Canadian model AUS : Austrarian model SP : Singapore model MY : Malaysia model CH : Chinese model

6. EXPLODED VIEWS

6-1. 6-2. 6-3. 6-4. 6-5. Case Section... 34 Chassis Section... 35 Cassette Holder Section.. 36 Front Panel Section... 37 Tape Mechanism Section.. 38
7. ELECTRICAL PARTS LIST.. 39

SECTION 1 GENERAL

1-1. LOCATION OF CONTROLS
1. 1/u (Power) button (US, Canadian) U (Power) button (EXCEPT US, Canadian) 2. DIRECTION MODE switch 3. PITCH CONTROL ( ON/ OFF) switch (TC-WE525) 4. PITCH CONTROL knob (TC-WE525) 5. Cassette holder (Deck A) 6. COUNTER A buttons (Deck A) RESET button MEMORY button 7. Display window 8. COUNTER B buttons (Deck B) RESET button MEMORY button 9. Cassette holder (Deck B) 10. Tape operation buttons (Deck A) 0 (REW) button ) (FF) button p CLEAR (Stop) button (Reverse play) button (Foward play) button
11. (Eject) button (Deck A) 12. DOLBY NR switch 13. Tape operation buttons (Deck B) 0 (REW) button ) (FF) button p (Stop) button (Reverse play) button (Foward play) button P PAUSE button R REC MUTING button r REC button 14. (Eject) button (Deck B) 15. START (DECK B P) button HIGH/NORMAL, DUBBING AnB button 16. PHONES jack (TC-WE425/WE525) 17. SYNCHRO button and indicator (TC-WE425/WE525) 18. ARL button 19. FADER button 20. REC LEVEL knob 21. AUTO indicator

SECTION 4 ELECTRICAL ADJUSTMENTS
1. The adjustment should be performed in the publication. (Be sure to male playback adjustment at first.) 2. The adjustments and measurement should be performed for both L-CH and R-CH. Switch position DOLBY NR switch : OFF DIRECTION MODE switch : A Standard record position : Deliver the standard input signal level to input jack and set the REC LEVEL control to obtain the standard output signal level as follows. Record Mode
AF OSC attenuator 10 k set 600 LINE IN LINE OUT 47 k

level meter

Forward back tension
Standard Input Level Input terminal source impedance input signal level Standard Output Level Output terminal load impedance output signal level Test Tape Tape P-4-A100 WS-48B P-4-L300 Contents 10 kHz, 10 dB 3 kHz, 0 dB 315 Hz, 0 dB Use Azimuth Adjustment Tape Speed Adjustment PB Level Adjustment LINE OUT 47 k 0.5 V (3.8 dB) LINE IN 10 k 0.5 V (3.8 dB)
Reverse Reverse back tension FF/REW

CQ-102RC

CQ-201B

0 dB = 0.775 V

Test Mode 1. Turn ON power switch pressing REC MUTING and ) (FF) (DECK A) at the same time. At first, all the fluorescent indicator light up, then the system returns to normal display. (However, 0. 00 is not displayed on the counter.) 2. To release the test mode, turn OFF the power switch.
Record/Playback Head Azimuth Adjustment DECK A Procedure: 1. Forward Playback Mode
test tape P-4-A100 (10 kHz, 10 dB) set LINE OUT

DECK B

Tape Speed Adjustment Procedure: Forward Playback Mode
test tape WS-48B (3 kHz, 0 dB) set

DECK A

level meter 47 k

frequency counter

LINE OUT
2. Turn the adjustment screw for the maximum output levels. If these levels do not match, turn the adjustment screw until both of output levels match together within 1 dB.

L-CH peak

output within level 1 dB

within 1 dB

screw position
R-CH peak L-CH peak R-CH peak
(High speed adjustment) 1. Set to test mode. (Refer to page 10.) 2. Set to FWD playback mode. 3. Twice pressing the HIGH/NORMAL switch. 4. Adjust RV316 (DECK A), RV416 (DECK B) so that the frequency counter reading becomes 5,Hz. 5. Release test mode after adjustment is completed. (Normal speed adjustment) 1. Set to FWD playback mode. 2. Adjust RV317 (DECK A), RV417 (DECK B) so that the frequency counter reading becomes 3,Hz. (Pitch control adjustment) (DECK A) (TC-WE525 only) 1. Push the PITCH CONTROL switch. 2. Set RV986 (PITCH CONTROL knob) to mechanical center. 3. Set to FWD playback mode. 4. Adjust RV318 so that the frequency counter reading becomes 2,Hz. Frequency difference between the beginning and the end of the tape should be within 3%. Frequency difference between the deck A and deck B the beginning of the tape should be within 1.5%. Adjustment Location: MAIN board (See page 13.)

3. Playback Mode

test tape P-4-A100 (10 kHz, 10 dB)

oscilloscope

Playback Level Adjustment Procedure: Forward Playback Mode
test tape P-4-L300 (315 Hz, 0 dB) set

LINE OUT Screen Pattern

In phase 45 good
4. Change the reverse playback mode and repeat the steps 1 to 3. 5. After the adjustment, lock the adjustment screws with suitable locking compound. Adjustment Location: record/playback head
Adjust DECK A : RV111 (L-CH), RV211 (R-CH) and DECK B : RV121 (L-CH), RV221 (R-CH) so the level meter reading becomes the adjustment limits below. Adjustment Value: LINE OUT level : 7.7 0.5 dB (0.301 to 0.338 V) Level difference between channels : within 0.5 dB Confirm that the LINE OUT level does not change in playback mode while changing the mode from playback to stop several times. Adjustment Location: MAIN board (See page 13.)

forward side

reverse side adjustment screws
Bias Consumption Current Adjustment
This adjustment should be performed when replacing the head assy or the bias oscillator transformer (T131, T231). Procedure:
blank tape CS-413 set LINE IN no signal R-CH L-CH digital voltmeter
Record Level Adjustment DECK B Setting: REC LEVEL control : standard record position (See page 10.) Procedure: 1. Record Mode
AF OSC 10 k attenuator set 600 LINE IN 315 Hz, 38.8 mV (26 dB) blank tape CS-123

3 TP431

1. 2. 3. 4.
Connect the digital voltmeter to test point TP431. Set RV131 (L-CH), RV231 (R-CH) to mechanical center. Set to FWD record mode. Adjust T131 (L-CH), T231 (R-CH) so that the digital voltmeter reading becomes minimum.

2. Playback Mode

recorded portion set LINE OUT level meter 47 k
Adjustment Value: Maximum 220 mV Adjustment Location: MAIN board (See page 13.) Record Bias Adjustment DECK B Setting: REC LEVEL control : standard record position (See page 10.) Procedure: 1. Record Mode
AF OSC 10 k attenuator set 600 LINE IN 1) 315 Hz 2) 10 kHz blank tape CS-123
Confirm playback the tape recorded become adjustment level as follows. If necessary, adjust RV161 (L-CH), RV261 (R-CH) and repeat the steps 1 and 2. Adjustment Value: LINE OUT level : 26 0.5 dB (36.7 to 41.1 mV) Adjustment Location: MAIN board (See page 13.)

38.8 mV (26 dB)

Confirm that the 10 kHz playback output is 0 0.5 dB relative to the 315 Hz output. If necessary, adjust RV131 (L-CH), RV231 (RCH) and repeat the steps given above. Adjustment Location: MAIN board (See page 13.)
Adjustment Location: main board

PLAYBACK LEVEL ADJ (DECK A) RV111 (L) RECORD LEVEL ADJ (DECK B) RV161 RV261 (L) (R) RV211 (R)
main board (component side)
RV318 TAPE SPEED ADJ (PITCH CONTROL) (TC-WE525 only)

RV121 (L)

RV221 (R)
RV317 (NORMAL) RV316 (HIGH)

TAPE SPEED ADJ (DECK A)

PLAYBACK LEVEL ADJ (DECK B)
RV417 (NORMAL) TAPE SPEED ADJ (DECK B) RV416 (HIGH) TP431 RV131 RV231 (L) (R) RECORD BIAS ADJ (DECK B) T131 (L) T231 (R)
BIAS CONSUMPTION CURRENT ADJ (DECK B)

SECTION 5 DIAGRAMS

5-1. IC PIN DESCRIPTION
IC801 CXP82220-051Q (SYSTEM CONTROLLER) Pin No. Pin Name I/O 1 A-PLAY I Play switch input (DECK A) 53, 54 POWER IN (CED) SIRCS RECVOLOUT BUSIN POWER OUT POWER IN (U) A-SHUT A-SHUMIT CAPM (H/L) PITCH.CON BUSOUT LINE MUTE LPF RECMUTE B-BIAS NR SW B-IV PB SELECT (A/B) REC/PB PBEQ (HIGH/NORM) NR/MUTE/PASS AMSOFF/AMS/BS B-RELAY B-SHUT B-SHUMIT B-PLAY B-HALF METER (L) METER (R) KEY3 KEY1 KEY2 RESET XIN XOUT VSS KEY4 RECVOL IN ARL (LED) SYNC (LED) I I O I O I I I O O O O O O O O I I O O O O O I I I I I I I I I I I O I I O O Power-in detection input Connected to ground. Sircs signal input Connected to ground. Record level control output (PWM) Not used in this set. Control A signal input Power hold output Power-in detection input Capstan motor rotation detection input (DECK A) Capstan motor rotation detection input (DECK A) Capstan motor high/normal select output L:ON Pitch control ON/OFF output L:ON Not used in this set. Control A signal output Line mute ON/OFF control output L:Mute ON Low pass filter on output Recording mute output L:Mute ON Bias ON/OFF output (DECK B) H:ON Dolby selector H:C, Open:B, L:Dolby off Metal detection input (DECK B) Playback A/B selector input L:A, H:B Record/playback dolby NR mode selector output L:Playback PB EQ high/normal select output L:Normal Audio selector H:Pass, Open:Mute, L:Dolby AMS amp selector H:BS, Open:AMS, L:OFF Relay record/playback selector output (DECK B) L:Record Capstan motor rotation detection input (DECK B) Capstan motor rotation detection input (DECK B) Play switch input (DECK B) Half switch input (DECK B) Meter L-CH input (A/D converter) Meter R-CH input (A/D converter) Key 3 input (A/D converter) Key 1 input (A/D converter) Key 2 input (A/D converter) System reset input System clock oscillator input (10 MHz) System clock oscillator output (10 MHz) Ground Connected to ground. Connected to ground. Key 4 input (A/D converter) Record volume input (A/D converter) Connected to power supply. Connected to ground. Not used in this set. AUTO LED driver H:ON SYNCHRO LED driver L:ON Not used in this set. Pin Description

Pin No. 99 100

Pin Name B-CAPM2 B-CAPM3 B-CAPM4 B-CAPM1 A-CAPM2 A-CAPM1 A-CAPM3 A-CAPM4 S17 S1 G1 G7 VEE VCC VREF AVSS TRGAON/OFF TRGBON/OFF A-HALF
I/O O O O O O O O O O O O O I Capstan motor driver (DECK B) Capstan motor driver (DECK B) Capstan motor driver (DECK B) Capstan motor driver (DECK B) Capstan motor driver (DECK A) Capstan motor driver (DECK A) Capstan motor driver (DECK A) Capstan motor driver (DECK A)

Pin Description

Fluorescent indicator tube segment driver Not used in this set. Fluorescent indicator tube grid driver Fluorescent indicator tube power supply (-24 V) Power supply (+5 V) Connected to power supply. Ground Not used in this set. Trigger control output (DECK A) Trigger control output (DECK B) Half switch input (DECK A)
5-2. CIRCUIT BOARDS LOCATION
POWER2 board (US, Canadian) LEAF SW (A) board POWER board
POWER1 board (Except US, Canadian) MAIN board
DIRECTION board (Except US, Canadian)

HEAD RELAY (PB) board

DISPLAY board RECVOL board LEAF SW (B) board H.P board (TC-WE425/WE525) HEAD RELAY (REC) board
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.)
For printed wiring boards. X : parts extracted from the component side. b : Pattern from the side which enables seeing. Transistor of B and C indication is omitted.

omitted

For schematic diagrams.
All capacitors are in F unless otherwise noted. pF: F 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. : internal component. 1 : fusible resistor. C : panel designation. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Note: Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi. : PB (DECK B) : REC (DECK B) : PB (DECK A) : STOP : Impossible to measure Voltages are taken with a VOM (Input impedance 10 M). Voltage variations may be noted due to normal production tolerances. Signal path. E : PB (DECK A) d : PB (DECK B) G : REC (DECK B) Abbreviation CND : Canadian model. AUS : Australian model. SP : Singapore model. MY : Malaysia model. CH : Chinese model. no mark ( ) < > [ ]
U : B+ Line. V : B Line. H : adjustment for repair. Voltage is dc with respect to ground under no-signal (detuned) condition.

TC-WE425/WE525/WR681

Semiconductor Location Ref. No. Location D159 C-7 D259 C-7 D306 D-11 D307 D-11 D318 D-11 D451 E-1 D581 B-6 D681 A-6 D701 B-10 D702 B-10 D703 A-10 D704 A-10 D705 B-10 D711 A-7 D712 A-8 D721 B-8 D731 D-5 D741 A-10 D761 A-8 D781 C-10 D782 C-11 D783 C-10 D791 A-11 D792 A-11 D793 D-10 D801 F-7 IC321 IC421 IC431 IC461 IC551 IC591 IC661 IC701 IC801 IC841 Q151 Q181 Q251 Q281 Q301 Q302 Q303 Q306 Q307 Q308 Q311 Q312 Q314 Q316 Q317 Q318 Q381 Q382 Q401 Q402 Q403 Q411 Q412 Q414 Q417 Q441 Q442 Q443 Q451 Q461 Q481 Q482 Q581 Q681 Q721 Q722 Q741 Q742 Q743 Q761 Q781 Q782 Q801 Q821 A-2 C-2 F-2 G-4 D-4 A-7 B-9 A-9 D-8 D-7 B-4 A-5 C-3 B-5 E-12 E-12 E-12 E-11 D-11 D-11 E-11 E-11 E-11 E-12 D-12 D-12 C-10 C-10 G-7 G-7 F-7 G-6 G-6 F-6 F-6 G-2 G-1 G-1 D-2 F-4 D-10 D-10 B-6 A-6 A-9 A-9 A-10 A-10 A-10 A-8 C-10 C-11 F-7 D-10

5-3. PRINTED WIRING BOARDS MAIN SECTION

(Page 29, 30)

(Page 26)

(Page 25)

(Page 32)

(Page 33)

5-4. SCHEMATIC DIAGRAM MAIN SECTION (1/3)

(Page 21)

(Page 23)
5-5. SCHEMATIC DIAGRAM MAIN SECTION (2/3)

(Page 20)

(Page 24)
5-6. SCHEMATIC DIAGRAM MAIN SECTION (3/3)

(Page 27) (Page 27)

(Page 28) (Page 21)

(Page 27)

(Page 31)
5-7. PRINTED WIRING BOARDS PANEL SECTION

(Page 18)

(Page 18) (Page 18)
5-8. SCHEMATIC DIAGRAM PANEL SECTION

(Page 23) (Page 23)

5-9. PRINTED WIRING BOARDS POWER SECTION

EXCEPT AUS

VOLTAGE
5-10. SCHEMATIC DIAGRAM POWER SECTION
5-11. PRINTED WIRING BOARD DECK A SECTION
5-12. SCHEMATIC DIAGRAM DECK A SECTION

(Page 19)

5-13. PRINTED WIRING BOARD DECK B SECTION

(Page 17)

5-14. SCHEMATIC DIAGRAM DECK B SECTION

SECTION 6 EXPLODED VIEWS

NOTE: The mechanical parts with no reference number in the exploded views are not supplied. Items marked * are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items. Abbreviation CND : Canadian model AUS : Australian model SP : Singapore model MY : Malaysia model CH : Chinese model -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) N Parts Color Cabinets Color Accessories and packing materials and hardware (# mark) list are given in the last of this parts list. N The components identified by mark ! dotted line with mark. or ! critical for safety. are Replace only with part number specified. Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi.

6-1. CASE SECTION

#1 #1 #1 not supplied #1
Ref. No. * * * * * * * * * * 1 1
Part No. 3-021-244-01 3-021-244-11 3-021-244-21 3-021-244-31 3-021-244-41 3-021-244-51 3-021-244-61 3-021-245-01 3-021-245-11 3-021-245-21
Description PANEL, BACK (WE425:US) PANEL, BACK (WE425:CND) PANEL, BACK (WE525:AEP) PANEL, BACK (WE525:UK) PANEL, BACK (WE425:AUS) PANEL, BACK (WE425:SP,MY) PANEL, BACK (WE425:CH) PANEL, BACK (WR681:US) PANEL, BACK (WR681:AEP) PANEL, BACK (WR681:E)

Remark

Ref. No. * 2 * 3 * ! S902
Part No. 3-935-634-01 3-703-244-00 3-703-571-11 3-363-099-01 1-692-155-11

Description

CASE (410726) BUSHING (2104), CORD (EXCEPT E) BUSHING (S) (4516), CORD (E) SCREW (CASE 3 TP2) SELECTOR, POWER VOLTAGE (VOLTAGE) (E,SP,MY)

* 1 * 1

3-021-245-31 PANEL, BACK (WR681:AUS) 3-021-245-41 PANEL, BACK (WR681:SP)

6-2. CHASSIS SECTION

US, CND AEP, SP, MY/ WR681 : AUS CH

T901 WE425 : AUS

not supplied

#1 WE425/ WE525 #1

WR681 #1 WE425/WE525
Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi.
The components identified by mark ! dotted line with mark. or ! critical for safety. are Replace only with part number specified.
Ref. No. ! 53 ! 54 ! 55 ! 56 ! 57 ! 58 ! 59 * * 62 * 63 * 64
Part No. 1-769-984-11 1-769-976-11 1-590-926-11 1-751-529-11 1-696-845-11 1-569-007-11 1-558-943-41 1-575-651-21 1-782-510-11 1-668-805-11 X-4946-543-2 4-978-398-21 3-346-265-31 1-573-047-11
Description WIRE (FLAT TYPE) (13 CORE) WIRE (FLAT TYPE) (13 CORE) CORD, POWER (US,CND) CORD, POWER (UK) CORD, POWER (WE425:AUS)
Ref. No. * 65 * 65 * 65 * 65 * 65
ADAPTOR, CONVERSION 2P (E) CORD, POWER (E) CORD, POWER (AEP,SP,MY/WR681:AUS) CORD, POWER (CH) POWER BOARD FOOT (SMALL) ASSY (WR681) CUSHION HOLDER, PC BOARD PIN, CONNECTOR (PC BOARD) 2P
A-2007-783-A MAIN BOARD, COMPLETE (WE425:US,CND) A-2007-786-A MAIN BOARD, COMPLETE (WE525) A-2007-793-A MAIN BOARD, COMPLETE (WE425:AUS,CH,SP,MY) A-2007-796-A MAIN BOARD, COMPLETE (WR681:US) A-2007-797-A MAIN BOARD, COMPLETE (WR681:AEP,E,AUS,SP) 4-977-591-01 FOOT (F50150S) (WE425:AUS,CH,SP,MY/WE525) 4-977-591-11 FOOT (F50150S) (WE425:US,CND) 1-429-387-11 TRANSFORMER, POWER (US,CND) 1-429-872-11 TRANSFORMER, POWER (AEP,UK,AUS,CH) 1-431-970-11 TRANSFORMER, POWER (E,SP,MY)

! T901 ! T901 ! T901

6-3. CASSETTE HOLDER SECTION

TCM-230ASR1

105 106

111 112

107 113

TCM-230ASR2

105 103

114 104

Ref. No. 107
Part No. X-3374-866-1 X-3374-867-1 3-931-427-31 3-022-410-01 3-019-450-01
Description LID (A) ASSY, CASSETTE LID (B) ASSY, CASSETTE BUTTON (EJECT) DAMPER PLATE (L), FULCRUM

Ref. No. 114

Part No. 3-019-451-01 X-3375-107-1 3-019-454-01 3-019-453-01 3-019-456-01
Description PLATE (R), FULCRUM HOLDER (L) ASSY, CASSETTE SPRING (L), LOADING LEVER (LOCK R) SCREW, STEP
X-3375-103-1 HOLDER (R) ASSY, CASSETTE 3-019-455-01 SPRING (R), LOADING

3-019-452-01 LEVER (LOCK L) 4-951-620-01 SCREW (2.6X8), +BVTP

6-4. FRONT PANEL SECTION

US, CND

171 166

EXCEPT US, CND

160 159

163 164

167 171

168 171
WE425 : AUS, CH, SP, MY/ WE525 #5

158 170

Ref. No. 154 * 158 159
Part No. X-3374-859-1 X-3374-861-1 X-3374-943-1 X-3375-108-1 3-021-239-01
Ref. No. * * 164 * * 167 * 168 * 169 * FL901
Part No. 1-668-801-11 3-931-429-41 1-668-800-11 3-380-952-21 3-931-378-01 1-668-802-11 1-773-391-11 A-2007-787-A 3-931-428-11 1-668-803-11
Description POWER2 BOARD (US,CND) BUTTON (POWER) (EXCEPT US,CND) POWER1 BOARD (EXCEPT US,CND) BUTTON (WE525) KNOB (F10) (WE525) DIRECTION BOARD (EXCEPT US,CND) WIRE (FLAT TYPE) (35 CORE) DISPLAY BOARD, COMPLETE HOLDER (FL) RECVOL BOARD
PANEL ASSY, FRONT (WE425:US,CND) PANEL ASSY, FRONT (WR681) PANEL ASSY, FRONT (WE425:AUS,CH,SP,MY) PANEL ASSY, FRONT (WE525) KNOB (REC)
4-996-698-41 EMBLEM, SONY 4-977-593-01 RING (DIA. 50), ORNAMENTAL (WE425:AUS,CH,SP,MY/WE525) 4-978-398-21 CUSHION 3-021-232-01 BUTTON (COUNTER) 3-021-230-11 BUTTON (FUNCTION) 3-931-241-11 BUTTON (SYNCHRO) (WR681) X-3371-370-1 BUTTON (SYNCHRO) ASSY (WE425/WE525) 3-931-429-51 BUTTON (POWER) (US,CND)
1-668-804-11 H.P BOARD (WE425/WE525) 4-951-620-01 SCREW (2.6X8), +BVTP 1-517-491-11 INDICATOR TUBE, FLUORESCENT
6-5. TAPE MECHANISM SECTION (DECK A : TCM-230ASR1) (DECK B : TCM-230ASR2)
#9 M1001 (DECK A) M1002 (DECK B)

#8 #6 #8

223 217

213 215

HP1 (DECK A) HRPE1 (DECK B) #7

220 219

222 210

Ref. No. * * 215

Part No. 3-016-574-01 X-3374-156-3 3-019-457-01 3-016-576-01 3-016-572-01 3-016-565-01 3-016-567-01 3-016-577-01 3-016-573-01 X-3374-155-3 3-016-564-01 3-019-208-01 X-3374-828-1 A-2004-688-A 3-016-566-01
Ref. No. 220 * 221 * * 223 * 223 HP1 HRPE1 M1001 M1002
Part No. 3-016-575-01 X-3374-235-1 3-024-405-01 X-3374-234-5 3-016-570-01 1-668-634-11 1-668-635-11 3-911-116-21 1-668-628-11 1-668-628-11

Description SPRING, TORSION FLYWHEEL (REV) ASSY BELT (FR2) FLYWHEEL (FWD) ASSY BELT (CAPSTAN) HEAD RELAY (PB) BOARD (DECK A) HEAD RELAY (REC) BOARD (DECK B) RIVET, PUSH LEAF SW (A) BOARD (DECK A) LEAF SW (B) BOARD (DECK B)
SPRING (HEAD), TENSION PINCH LEVER (REV) ASSY COVER, LEAF SWITCH SPRING, TORSION (DECK B) LEVER (EJECT PREVENTION L) (DECK B) BASE (PINCH LEVER REV) SPRING (CASSETTE), LEAF SPRING, TORSION (DECK A) LEVER (EJECT PREVENTION R) (DECK A) PINCH LEVER (FWD) ASSY BASE (PINCH LEVER FWD) WASHER, STOPPER CHASSIS ASSY, MECHANICAL MECHANICAL BLOCK ASSY SLIDER, REVERSE
A-2004-645-A DECK (A) ASSY, HEAD (PLAYBACK) (DECK A) A-2004-646-A DECK (B) ASSY, HEAD (RECORD/PLAYBACK/ERASE) (DECK B) A-2004-644-A MOTOR ASSY, CAPSTAN (DECK A) A-2004-644-A MOTOR ASSY, CAPSTAN (DECK B)
SECTION 7 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 Abbreviation CND : Canadian model MY : Malaysia model AUS : Australian model CH : Chinese model SP : Singapore model 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 : , for example: uA. : A. uPA. : PA. uPB. : PB. uPC. : PC. uPD. : PD. CAPACITORS uF : F COILS uH : H

DIRECTION DISPLAY

The components identified by mark ! dotted line with mark. or ! critical for safety. are Replace only with part number specified. Les composants identifis par une marque ! sont critiques pour la scurit. Ne les remplacer que par une pice portant le numro spcifi. When indicating parts by reference number, please include the board.

Ref. No. *

Ref. No. R914 R915 R916 R917 R921
Part No. 1-249-424-11 1-249-427-11 1-249-431-11 1-249-437-11 1-249-418-11 1-249-420-11 1-249-422-11 1-249-424-11 1-249-427-11 1-249-418-11 1-249-420-11 1-249-422-11 1-249-424-11 1-249-427-11
Description CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON CARBON < SWITCH > 3.9K 6.8K 15K 47K 1.2K 1.8K 2.7K 3.9K 6.8K 1.2K 1.8K 2.7K 3.9K 6.8K 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5% 5%
Remark 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W
1-668-802-11 DIRECTION BOARD (EXCEPT US,CND) **************** < RESISTOR > R929 R943 R986 1-249-437-11 CARBON 1-249-439-11 CARBON 1-249-429-11 CARBON 47K 68K 10K 5% 5% 5% 1/4W 1/4W (WE525) 1/4W (WE525)

R922 R923 R924 R925 R931 R932 R933 R934 R935
< VARIABLE RESISTOR > RV986 1-225-619-11 RES, VAR, CARBON 10K (PITCH CONTROL) (WE525) < SWITCH > 1-762-567-11 SWITCH, SLIDE (DIRECTION MODE) 1-554-118-00 SWITCH, PUSH (1 KEY) (PITCH CONTROL) (WE525) ************************************************************* * A-2007-787-A DISPLAY BOARD, COMPLETE ************************ 3-931-428-11 HOLDER (FL) < CAPACITOR > C901 1-104-665-11 ELECT < CONNECTOR > CN901 1-784-757-11 CONNECTOR, FFC 35P < FLUORESCENT INDICATOR > FL901 1-517-491-11 INDICATOR TUBE, FLUORESCENT < IC > IC901 8-749-014-66 IC NJL56H400 < RESISTOR > R901 R902 R903 R911 R912 R913 1-247-807-11 1-247-807-11 1-249-441-11 1-249-418-11 1-249-420-11 CARBON CARBON CARBON CARBON CARBON 100K 1.2K 1.8K 2.7K 5% 5% 5% 5% 5% 5% 1/4W 1/4W 1/4W 1/4W 1/4W 1/4W 1-554-303-21 SWITCH, TACTILE ()) (DECK A) 1-554-303-21 SWITCH, TACTILE (HIGH/NORMAL, DUBBING AnB) S935 1-554-303-21 SWITCH, TACTILE (MEMORY) (DECK B) S936 1-554-303-21 SWITCH, TACTILE (RESET) (DECK B) ************************************************************* * 1-668-804-11 H.P BOARD (WE425/WE525) ********** < CAPACITOR > C991 C992 C993 1-162-294-31 CERAMIC 1-162-294-31 CERAMIC 1-161-494-00 CERAMIC 0.001uF 0.001uF 0.022uF 10% 10% 50V 50V 25V S933 S934 100uF 20% 10V S924 S925 S926 S931 S932 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 SWITCH, TACTILE (0) (DECK B) SWITCH, TACTILE ()) (DECK B) SWITCH, TACTILE (r REC) (DECK B) SWITCH, TACTILE (MEMORY) (DECK A) SWITCH, TACTILE (RESET) (DECK A) S986 S987
S901 S911 S912 S913 S914 S915 S916 S921 S922 S923
1-762-567-11 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21 1-554-303-21
SWITCH, SLIDE (DOLBY NR) SWITCH, TACTILE (p) (DECK B) SWITCH, TACTILE () (DECK B) SWITCH, TACTILE () (DECK B) SWITCH, TACTILE (R REC MUTING) (DECK B) SWITCH, TACTILE (P PAUSE) (DECK B) SWITCH, TACTILE (0) (DECK A) SWITCH, TACTILE (p) (DECK A) SWITCH, TACTILE () (DECK A) SWITCH, TACTILE () (DECK A)

1-249-422-11 CARBON

HEAD RELAY (PB)

HEAD RELAY (REC) MAIN

Remark Ref. No. Part No. Description < RESISTOR > R1002 R1003 R1004 R1005 1-249-409-11 1-249-414-11 1-247-834-11 1-247-818-11 CARBON CARBON CARBON CARBON < SWITCH > 1.3K 300 5% 5% 5% 5% 1/4W 1/4W 1/4W 1/4W Remark

LEAF SW (A)

Ref. No. Part No.

LEAF SW (B)

Description < JACK >
J991 1-568-519-41 JACK, LARGE TYPE (PHONES) ************************************************************* * 1-668-634-11 HEAD RELAY (PB) BOARD ********************* < CONNECTOR > * CN1002 1-564-719-11 PIN, CONNECTOR (SMALL TYPE) 3P ************************************************************ * 1-668-635-11 HEAD RELAY (REC) BOARD ********************** < CONNECTOR > CN1003 1-564-722-11 PIN, CONNECTOR (SMALL TYPE) 6P ************************************************************* * 1-668-628-11 LEAF SW (A) BOARD ***************** < CONNECTOR > CN1001 1-568-444-11 SOCKET, CONNECTOR 13P

< VARIABLE RESISTOR > C971 C972 1-164-159-11 CERAMIC 1-164-159-11 CERAMIC < CONNECTOR > CN974 1-568-106-11 PIN, CONNECTOR 4P (E,SP,MY) < TRANSFORMER > ! T901 1-429-387-11 TRANSFORMER, POWER (US,CND) ! T901 1-429-872-11 TRANSFORMER, POWER (AEP,UK,AUS,CH) ! T901 1-431-970-11 TRANSFORMER, POWER (E,SP,MY) ************************************************************* * 1-668-800-11 POWER1 BOARD (EXCEPT US,CND) ************** < CAPACITOR > ! C981 1-113-925-11 CERAMIC < CONNECTOR > CN981 1-568-226-11 PIN, CONNECTOR 2P < SWITCH > ! S981 1-762-581-11 SWITCH, AC POWER PUSH (1 KEY) (U) ************************************************************* * 1-668-801-11 POWER2 BOARD (US,CND) ************** < RESISTOR > R927 1-249-437-11 CARBON < SWITCH > S961 1-554-118-00 SWITCH, PUSH (1 KEY) (1/u) S962 1-762-567-11 SWITCH, SLIDE (DIRECTION MODE) ************************************************************* * 1-668-803-11 RECVOL BOARD ************* < DIODE > D951 D952 8-719-313-43 LED SEL6210S-TH10 (AUTO) 8-719-313-43 LED SEL6210S-TH10 (SYNCHRO) (WE425/WE525) 47K 5% 1/4W 0.01uF 20% 250V ! 53 ! 54 ! 55 ! 56 ! 57 ! 58 ! HP1 HRPE1 M1001 M1002 ! S902 1-769-976-11 1-769-984-11 1-590-926-11 1-751-529-11 1-696-845-11 1-569-007-11 1-558-943-41 1-575-651-21 1-782-510-11 1-773-391-11 0.1uF 0.1uF 50V 50V RV951 1-225-616-11 RES, VAR, CARBON 20K (REC LEVEL) < SWITCH > S941 1-554-303-21 SWITCH, TACTILE (ARL) S942 1-554-303-21 SWITCH, TACTILE (FADER) S943 1-554-303-21 SWITCH, TACTILE (SYNCHRO) (WE425/WE525) ************************************************************* MISCELLANEOUS *************** WIRE (FLAT TYPE) (13 CORE) WIRE (FLAT TYPE) (13 CORE) CORD, POWER (US,CND) CORD, POWER (UK) CORD, POWER (WE425:AUS) ADAPTOR, CONVERSION 2P (E) CORD, POWER (E) CORD, POWER (AEP,SP,MY/WR681:AUS) CORD, POWER (CH) WIRE (FLAT TYPE) (35 CORE)
A-2004-645-A DECK (A) ASSY, HEAD (PLAYBACK) (DECK A) A-2004-646-A DECK (B) ASSY, HEAD (RECORD/PLAYBACK/ERASE) (DECK B) A-2004-644-A MOTOR ASSY, CAPSTAN (DECK A) A-2004-644-A MOTOR ASSY, CAPSTAN (DECK B) 1-692-155-11 SELECTOR, POWER VOLTAGE (VOLTAGE) (E,SP,MY)
! T901 1-429-387-11 TRANSFORMER, POWER (US,CND) ! T901 1-429-872-11 TRANSFORMER, POWER (AEP,UK,AUS,CH) ! T901 1-431-970-11 TRANSFORMER, POWER (E,SP,MY) *************************************************************

Ref. No.

ACCESSORIES & PACKING MATERIALS ******************************** 1-558-271-11 CORD, CONNECTION (AUDIO) 1-777-241-11 CORD, CONNECTION (CONTROL A1) (CND) 3-810-765-33 MANUAL, COMMONNESS INSTRUCTION (CONTROL A1) (ENGLISH) (WE425:US,AUS/WE525:UK) 3-810-765-43 MANUAL, COMMONNESS INSTRUCTION (CONTROL A1) (ENGLISH,FRENCH,GERMAN, SPANISH,DUTCH,SWEDISH,ITALIAN, PORTUGUESE,CHINESE) (WE425:CND,CH,SP,MY/WE525:AEP) 3-862-714-11 MANUAL, INSTRUCTION (ENGLISH) (US,CND,UK,AUS,CH) 3-862-714-21 MANUAL, INSTRUCTION (ENGLISH,FRENCH, SPANISH,PORTUGUESE) (AEP,E,SP,MY) 3-862-714-31 MANUAL, INSTRUCTION (GERMAN,DUTCH, SWEDISH,ITALIAN) (AEP) 3-862-714-41 MANUAL, INSTRUCTION (CHINESE) (E,CH,SP,MY) 3-862-714-51 MANUAL, INSTRUCTION (ARABIC) (E) 3-862-714-61 MANUAL, INSTRUCTION (FRENCH) (CND) ************************************************************* ************** HARDWARE LIST ************** #1 #2 #3 #4 #5 #6 #7 #8 #9 7-685-646-79 7-685-871-01 7-685-851-09 7-685-852-04 7-685-134-19 7-628-254-15 7-623-505-01 7-685-850-04 7-685-851-04 SCREW +BVTP 3X8 TYPE2 N-S SCREW +BVTT 3X6 (S) SCREW +BVTT 2X4 (S) SCREW +BVTT 2X5 (S) SCREW +PTPWH 2.6X8 (TYPE2) SCREW +PS 2.6X6 LUG, 2 SCREW +BVTT 2X3 (S) SCREW +BVTT 2X4 (S)

Sony Corporation

9-922-808-11
Home A&V Products Company
98D0490-1 Printed in Japan C1998. 4 Published by General Engineering Dept. (Shibaura)