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Sony TC-WE625 Service Manual
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Sony TC-WE625 Service Manual

Sony TC-WE625 Service Manual

Stereo cassette deck
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SERVICE MANUAL
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.
System
Recording system
4-track 2-channel stereo
Fast-winding time (approx.)
90 sec. (with Sony C-60 cassette)
High-speed fast-winding time (approx.) (TC-WE825S and TC-WE725
only)
45 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
With Dolby S NR on (TC-WE825S only): 10 dB at 100 Hz,
24 dB at 1 kHz
MICROFILM
Photo: TC-WE825S
Model Name Using Similar
Mechanism
Tape Transport
Mechanism Type
SPECIFICATIONS
Harmonic distortion
Frequency response (Dolby NR off)
Tape type
Type I tape, Sony Type I
(NORMAL)
Type II tape, Sony Type II
(HIGH)
Type IV tape, Sony Type IV
(METAL)
– 1 –
TC-WE625/WE725/
Canadian Model
Australian Model
Chinese Model
TC-WE505/WE605S/WE705S
TC-WE625 : TCM-190RB12CL
DECK A
TC-WE725/WE825S :
TC-WE625 : TCM-190RB12CL
DECK B
TC-WE725/WE825S :
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.)
30-16,000 Hz (±3 dB, IEC),
20-17,000 Hz (±6 dB)
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),
30-13,000 Hz (±3 dB, –4 dB
recording)
– Continued on next page –
STEREO CASSETTE DECK
WE825S
US Model
TC-WE625/WE825S
TC-WE625
AEP Model
UK Model
TC-WE725/WE825S
E Model
TC-WE625
TCM-190RB13C
TCM-190RB11C

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Summary of Contents for Sony TC-WE625

  • Page 1 TCM-190RB11C SPECIFICATIONS System Harmonic distortion Recording system 0.4% (with Type I tape, Sony Type I (NORMAL): 4-track 2-channel stereo 160 nWb/m 315 Hz, 3rd H.D.) Fast-winding time (approx.) 1.8% (with Type IV tape, Sony Type IV (METAL): 250 nWb/m 315 Hz, 3rd H.D.) 90 sec.
  • Page 2 CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: Table Of Contents

    2-2. Mechanism Deck ..............5 2-3. Fitting Base ................. 6 2-4. Capstan Motor, Reel Motor ..........6 Part No. Model 2-5. Head Deck Assy ..............7 3-021-228-0π TC-WE625 : US model 3-021-228-1π TC-WE625 : CND model 3. MECHANICAL ADJUSTMENTS ......... 8 3-021-228-2π...

  • Page 4: General

    SECTION 1 GENERAL 1-1. LOCATION OF CONTROLS 16 17 1. 1/u (Power) button (US, Canadian) 12. § (Eject) button (Deck A) U (Power) button (EXCEPT US, Canadian) 13. DOLBY NR switches 2. DIRECTION MODE switch ON, OFF, FILTER switch 3. PITCH CONTROL (Ø ON/ø OFF) switch B, C, S switch (“S”...

  • Page 5: Disassembly

    SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. CASE Unscrew the five case attachment screws M3 × 8 and remove the case. 2-1. FRONT PANEL ASSY POWER VOLTAGE SELECTOR 1 - 2 (Singapore, Malaysia) FRONT PANEL ASSY 1 - !¶...

  • Page 6: Fitting Base

    2-3. FITTING BASE 4 PTPWH 2x23 3 connector 6 fitting base 2 Pull the square belt 5 claws and put around claws. 7 gear (trigger) 1 Pull the capstan belt and put around claws. 2-4. CAPSTAN MOTOR, REEL MOTOR 4 claw 2 connector 3 connector 8 capstan motor...

  • Page 7: Head Deck Assy

    2-5. HEAD DECK ASSY 6 claw 7 head deck assy 1 claw 3 claw 5 torsion spring 4 lever (pinch R) assy 2 lever (pinch F) assy – 7 –...

  • Page 8: Mechanical Adjustments

    SECTION 3 SECTION 4 ELECTRICAL ADJUSTMENTS MECHANICAL ADJUSTMENTS PRECAUTION PRECAUTION 1. Clean the following parts with a denatured alcohol-moistened 1. The adjustment should be performed in the publication. swab : (Be sure to male playback adjustment at first.) record/playback/erase head pinch roller 2.
  • Page 9 Record/Playback Head Azimuth Adjustment Tape Speed Adjustment DECK A DECK B DECK A DECK B Procedure: Procedure: –Forward Playback Mode– 1. Forward Playback Mode test tape test tape WS-48B P-4-A100 (3 kHz, 0 dB) level meter frequency counter 47 k Ω (10 kHz, –10 dB) 47 k Ω...
  • Page 10 Bias Consumption Current Adjustment Record Level Adjustment DECK A DECK B DECK A DECK B Setting: This adjustment should be performed when replacing the head assy REC LEVEL control : standard record position (See page 8.) or the bias oscillator transformer (T81, T91). Procedure: Procedure: 1.
  • Page 11 Adjustment Location: –audio board (component side)– RECORD BIAS ADJ RV91 RV81 RV72 (HIGH) TAPE SPEED ADJ RV71 (NORMAL) TP81 BIAS PLAYBACK RV21 (R) T81 (L) CONSUMPTION LEVEL CURRENT T91 (R) RV11 (L) –main board (component side)– RECORD LEVEL ADJ (DECK B) RV101 RV201 RECORD LEVEL ADJ...

  • Page 12: Diagrams

    SECTION 5 DIAGRAMS 5-1. IC PIN DESCRIPTION • IC801 CXP82432A-006Q (SYSTEM CONTROLLER) Pin No. Pin Name Pin Description T-REEL (A) Take-up reel rotation detection input (DECK A) S-REEL (B) Supply reel rotation detection input (DECK B) T-REEL (B) Take-up reel rotation detection input (DECK B) SIRCS IN Sircs signal input POWER IN...
  • Page 13 Pin No. Pin Name Pin Description BIAS CAL 1 (B) EQ bias CAL-1 output for auto calibration. (DECK B) BIAS CAL 2 (B) EQ bias CAL-2 output for auto calibration. (DECK B) BIAS CAL 3 (B) EQ bias CAL-3 output for auto calibration. (DECK B) BIAS CAL 0 (A) EQ bias CAL-0 output for auto calibration.

  • Page 14: Circuit Boards Location

    5-2. CIRCUIT BOARDS LOCATION TRANS (A) board (Except Singapore, Malaysia) AUDIO (A) board TRANS (B) board SW (C) board MAIN board (Except US, Canadian) DOLBY-S board (WE825S) SW (A) board (US, Canadian) SW (B) board (Except US, Canadian) LEAF SW (A) board FL board REC VOL board LEAF SW (B) board...

  • Page 15: Printed Wiring Boards -Main Section

    TC-WE625/WE725/WE825S 5-3. PRINTED WIRING BOARDS — MAIN SECTION — (Page 35) (Page 25) (Page 28) (Page 31) (Page 28) (Page 31) (Page 35) (Page 33) (Page 33) (Page 28) (Page 15) (Page 27) (Page 31) (Page 31) – 15 –...
  • Page 16 TC-WE625/WE725/WE825S 5-4. SCHEMATIC DIAGRAM — MAIN SECTION (1/4) — • Refer to page 37 for IC Block Diagrams. • Semiconductor Location Ref. No. Location D101 D201 D401 D521 D522 D601 D602 D701 D702 (Page 32) D703 D704 D705 D706 D707...
  • Page 17 TC-WE625/WE725/WE825S 5-5. SCHEMATIC DIAGRAM — MAIN SECTION (2/4) — • Refer to page 37 for IC Block Diagrams. (Page 18) (Page (Page 21) (Page (Page 34) (Page 23) – 19 – – 20 –...

  • Page 18: Schematic Diagram -Main Section (1/4)

    TC-WE625/WE725/WE825S 5-6. SCHEMATIC DIAGRAM — MAIN SECTION (3/4) — (Page 29) (Page 29) (Page (Page 30) (Page (Page (Page 20) (Page 24) – 21 – – 22 –...

  • Page 19: Schematic Diagram -Main Section (2/4)

    TC-WE625/WE725/WE825S 5-7. SCHEMATIC DIAGRAM — MAIN SECTION (4/4) — (Page 22) (Page (Page (Page (Page – 23 – – 24 –...

  • Page 20: Printed Wiring Boards -Power Section

    TC-WE625/WE725/WE825S 5-8. PRINTED WIRING BOARDS — POWER SECTION — 5-9. SCHEMATIC DIAGRAM — POWER SECTION — (Page 16) (Page 22) NOT REPLACEABLE: BUILT IN TRANSFORMER S701 VOLTAGE 220V 230–240V 120V – 25 – – 26 –...

  • Page 21: Printed Wiring Boards -Panel Section

    TC-WE625/WE725/WE825S 5-10. PRINTED WIRING BOARDS — PANEL SECTION — (Page 15) (Page 16) (Page 16) (Page 16) (Page 16) – 27 – – 28 –...

  • Page 22: Schematic Diagram -Panel Section

    TC-WE625/WE725/WE825S 5-11. SCHEMATIC DIAGRAM — PANEL SECTION — (Page 22) (Page 22) (Page (Page 22) (Page – 29 – – 30 –...

  • Page 23: Printed Wiring Boards -Deck A Section

    TC-WE625/WE725/WE825S 5-12. PRINTED WIRING BOARDS — DECK A SECTION — 5-13. SCHEMATIC DIAGRAM — DECK A SECTION — (Page 16) (Page 17) (Page 17) (Page 17) (Page 16) (Page 16) (Page 16) (Page 17) (Page 16) • Semiconductor Location Ref. No.

  • Page 24: Printed Wiring Boards -Deck B Section

    TC-WE625/WE725/WE825S 5-14. PRINTED WIRING BOARDS — DECK B SECTION — 5-15. SCHEMATIC DIAGRAM — DECK B SECTION — LEAF SW ( B ) BOARD (Page 19) (Page 19) (Page 15) (Page 15) (Page 15) (Page 19) (Page 15) • Semiconductor Location Ref.

  • Page 25: Printed Wiring Board -Dolby-S Section (Tc-We825S Only)

    TC-WE625/WE725/WE825S 5-16. PRINTED WIRING BOARD — DOLBY-S SECTION 5-17. SCHEMATIC DIAGRAM — DOLBY-S SECTION (TC-WE825S only) — (TC-WE825S only) — (Page 15) (Page 24) – 35 – – 36 –...

  • Page 26: Ic Block Diagrams

    • IC Block Diagrams IC1 CXA1917AM-T6 (TC-WE825S onl y) IC504 CXA1597P SPEED 16 Gp CAL 30 MC4IN HLSMP TAPE EQ CONTROL 15 REC MUTE 29 MC3IN MCTC DGND 14 REC CAL REC IN1 13 REC IN2 28 MCBO BIAS 12 IREF BOOST1 11 BOOST2 LFDET...

  • Page 27: Exploded Views

    SECTION 6 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • -XX and -X mean standardized parts, so The components identified by number in the exploded views are not supplied. they may have some difference from the mark ! or dotted line with mark. •...

  • Page 28: Chassis Section

    6-2. CHASSIS SECTION a (except SP, MY) (including a-h) T701 not supplied not supplied not supplied The components identified by Les composants identifiés par une mark ! or dotted line with mark. marque ! sont critiques pour la ! are critical for safety. sécurité.

  • Page 29: Cassette Holder Section

    6-3. CASSETTE HOLDER SECTION not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3374-864-1 LID (A) ASSY, CASSETTE * 109 3-354-953-01 LEVER (LOCK LEVER L) X-3374-865-1 LID (B) ASSY, CASSETTE 3-354-957-01 JOINT (LOCK LEVER) 3-931-427-31 BUTTON (EJ) X-4945-946-1 HOLDER (R) ASSY, CASSETTE X-4945-947-1 HOLDER (L) ASSY, CASSETTE 4-959-232-21 SPRING (R), TORSION...

  • Page 30: Front Panel Section

    3-380-952-21 BUTTON (WE725/WE825S) X-3375-510-1 PANEL ASSY, FRONT (WE825S:US) 3-931-378-01 KNOB (F10) (WE725/WE825S) 3-021-239-01 KNOB (REC) 1-769-598-11 WIRE (FLAT TYPE) (41 CORE) 4-996-698-41 EMBLEM, SONY * 163 3-377-337-11 HOLDER (FL) 4-951-620-01 SCREW (2.6X8), +BVTP 4-977-593-01 RING (DIA. 50), ORNAMENTAL * 155...

  • Page 31: Tape Mechanism Section 1

    6-5. TAPE MECHANISM SECTION 1 DECK A DECK B WE625 TCM-190RB12CL TCM-190RB12CL WE725 TCM-190RB13C TCM-190RB11C WE825S TCM-190RB13C TCM-190RB11C not supplied HRPE101 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-907-362-01 SPRING, TORSION 3-359-414-01 SCREW (+PTPWH 2X23) 3-356-713-01 WASHER 1-638-983-11 MOTOR FLEXIBLE BOARD X-3366-047-1 LEVER (PINCH F) ASSY...

  • Page 32: Tape Mechanism Section 2

    6-6. TAPE MECHANISM SECTION 2 DECK A DECK B WE625 TCM-190RB12CL TCM-190RB12CL WE725 TCM-190RB13C TCM-190RB11C WE825S TCM-190RB13C TCM-190RB11C Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-359-469-01 SPACER 3-359-429-01 SLIDER (BRAKE PLATE) 3-359-425-01 SLIDER (REVERSE SLIDER) 3-359-456-01 SPRING (TRIGGER SPRING), TORSION 3-359-426-01 LEVER (REVERSE LEVER) X-3366-569-1 ARM ASSY, FR...

  • Page 33: Electrical Parts List

    SECTION 7 AUDIO (A) ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark ! or dotted line with mark. the parts list may be different from the they are seldom required for routine service.
  • Page 34 AUDIO (A) AUDIO (B) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-309-00 METAL CHIP 1/10W 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V 1-216-298-00 METAL CHIP 1/10W 1-164-161-11 CERAMIC CHIP 0.0022uF 10% 100V 1-216-082-00 RES,CHIP 1/10W 1-163-019-00 CERAMIC CHIP 0.0068uF 10% 1-216-081-00 METAL CHIP 1/10W...
  • Page 35 AUDIO (B) DOLBY-S Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > A-2007-801-A DOLBY-S BOARD, COMPLETE (WE825S) ************************ 1-216-099-00 METAL CHIP 120K 1/10W 1-216-025-00 RES,CHIP 1/10W < CAPACITOR > 1-216-100-00 RES,CHIP 130K 1/10W 1-216-068-00 METAL CHIP 6.2K 1/10W 1-136-165-00 FILM...
  • Page 36 DOLBY-S Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-208-812-11 RES,CHIP 1/10W R932 1-216-055-00 METAL CHIP 1.8K 1/10W 1-216-615-11 METAL CHIP 0.5% 1/10W R935 1-216-069-00 METAL CHIP 6.8K 1/10W 1-216-619-11 METAL CHIP 0.5% 1/10W R936 1-216-077-00 METAL CHIP 1/10W 1-216-684-11 METAL CHIP 0.5%...
  • Page 37 HEADPHONE LEAF SW (A) LEAF SW (B) MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark HEADPHONE BOARD < RESISTOR > (SUPPLIED WITH MAIN BOARD, COMPLETE) 1-249-414-11 CARBON 1/4W ***************** 1-247-818-11 CARBON 1/4W < JACK > 1-247-834-11 CARBON 1.3K 1/4W...
  • Page 38 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C203 1-163-017-00 CERAMIC CHIP 0.0047uF 5% C710 1-126-935-11 ELECT 470uF 6.3V C204 1-126-963-11 ELECT 4.7uF C711 1-126-947-11 ELECT 47uF C206 1-126-963-11 ELECT 4.7uF C801 1-126-933-11 ELECT 100uF C207 1-126-964-11 ELECT 10uF...
  • Page 39 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < IC > Q703 8-729-141-83 TRANSISTOR 2SB1094-LK Q704 8-729-010-29 TRANSISTOR MSD601-RST1 IC501 8-752-075-27 IC CXA1878Q Q705 8-729-421-22 TRANSISTOR UN2211 (US,CND) IC502 8-759-636-55 IC M5218AFP Q706 8-729-421-22 TRANSISTOR UN2211 (US,CND) IC504 8-752-070-67 IC CXA1597P Q707...
  • Page 40 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R220 1-216-089-00 RES,CHIP 1/10W R579 1-216-067-00 METAL CHIP 5.6K 1/10W R221 1-216-089-00 RES,CHIP 1/10W R580 1-216-059-00 METAL CHIP 2.7K 1/10W R222 1-216-073-00 METAL CHIP 1/10W R581 1-216-065-00 RES,CHIP 4.7K 1/10W R223...
  • Page 41 MAIN REC VOL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ! R720 1-219-136-11 FUSIBLE 0.22 1/4W F R855 1-216-083-00 METAL CHIP 1/10W R721 1-216-073-00 METAL CHIP 1/10W R861 1-216-073-00 METAL CHIP 1/10W ! R722 1-219-137-11 FUSIBLE 0.33 1/4W F R862...
  • Page 42 REC VOL SW (A) SW (B) SW (C) TRANS (A) TRANS (B) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > < SWITCH > Q901 8-729-424-08 TRANSISTOR UN2111 S947A 1-762-609-11 SWITCH, SLIDE (DIRECTION MODE) Q902 8-729-424-08 TRANSISTOR UN2111 S960A...
  • Page 43 TC-WE625/WE725/WE825S Ref. No. Part No. Description Remark MISCELLANEOUS *************** 1-590-486-11 WIRE (FLAT TYPE) (7 CORE) (WE625) 1-769-914-11 WIRE (FLAT TYPE) (9 CORE) (WE725/WE825S) 1-769-883-11 WIRE (FLAT TYPE) (7 CORE) (WE625) 1-769-916-11 WIRE (FLAT TYPE) (9 CORE) (WE725/WE825S) ! 58 1-575-651-21 CORD, POWER (AEP,SP,MY)

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