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Sony TC-WE675 Service Manual
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Sony TC-WE675 Service Manual

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SERVICE MANUAL
Ver 1.0 2001.04
Dolby noise reduction extension manufactured under license
from Dolby Laboratories Licensing Corporation.
HX Pro originated by Bang & Olufsen. "DOLBY", the double-D
symbol ; and "HX PRO" are trademarks of Dolby Laboratories
Licensing Corporation.
System
Fast-winding time
Approx.100 sec. (with Sony C-60 cassette)
Signal-to-noise ratio (at peak level and weighted with Dolby
NR off)
55 dB, using Sony TYPE I cassette
57 dB, using Sony TYPE II cassette
58 dB, using Sony TYPE IV cassette
S/N ratio improvement
With Dolby B NR on:
Approx. 5 dB at 1 kHz, 10 dB at 5 kHz
With Dolby C NR on:
Approx. 15 dB at 500 Hz, 20 dB at 1 kHz
Harmonic distortion
0.4% (using Sony TYPE Icassette):
160 nWb/m 315 Hz, 3rd H.D.)
1.8% (using Sony TYPE IV cassette):
250 nWb/m 315 Hz, 3rd H.D.)
Frequency response (DOLBY NR OFF)
30-16,000 Hz (±3 dB, IEC), 20-17,000 Hz
(±6 dB), using Sony TYPE I cassette
30-17,000 Hz (±3 dB, IEC), 20-18,000 Hz
(±6 dB), using Sony TYPE II cassette
30-19,000 Hz (±3 dB, IEC), 20-20,000 Hz
(±6 dB), 30-13,000 Hz (±3 dB, –4dB recording),
using Sony TYPE IV cassette
Sony Corporation
9-873-894-11
Home Audio Company
2001D0900-1
Shinagawa Tec Service Manual Production Group
© 2001. 4
TC-WE675
Model Name Using Similar Mechanism
Transport Mechanism Type
SPECIFICATIONS
Wow and flutter
±0.13% W. Peak (IEC)
0.1% W. RMS (NAB)
±0.2% W. Peak (DIN)
Variable pitch range
Approx. –30 to +30 %
Inputs
Line inputs (phono jacks)
sensitivity 0.16 V, input impedance 47 kilohms
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 phone jack)
output level 0.25 mW at a load impedance of
32 ohms
STEREO CASSETTE DECK
US Model
Canadian Model
AEP Model
UK Model
E Model
Australian Model
TC-WE635
TCM-230ASR41B
— Continued on next page —

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  • Page 1 Signal-to-noise ratio (at peak level and weighted with Dolby ±0.2% W. Peak (DIN) NR off) Variable pitch range 55 dB, using Sony TYPE I cassette Approx. –30 to +30 % 57 dB, using Sony TYPE II cassette 58 dB, using Sony TYPE IV cassette...
  • Page 2 LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 3: Table Of Contents

    TC-WE675 MODEL IDENTIFICATION TABLE OF CONTENTS 1. GENERAL –Back panel– ................4 2. DISASSEMBLY 2-1. Case ..................5 Part No. 2-2. Front Panel Assy ..............5 2-3. Cassette Lid Assy (Deck A/B) ..........6 2-4. Mechanism Deck Assy (Deck A/B) ........6 PARTS No.

  • Page 4: General

    TC-WE675 SECTION 1 GENERAL Front Panel ejeh egef ws w; ql qk qj qdqs Location of Parts and Controls ws REC MUTING W (Deck B) button 1 POWER button wd PAUSE X (Deck B) button 2 RESET (Deck A) button...

  • Page 5: Disassembly

    TC-WE675 SECTION 2 DISASSEMBLY • The equipment can be removed using the following procedure. Case Front Panel Assy Cassette Lid Assy (Deck A/B) Mechanism Deck Assy (Deck A/B) Note : Follow the disassembly procedure in the numerical order given. 2-1. CASE...

  • Page 6: Cassette Lid Assy (Deck A/B)

    TC-WE675 2-3. CASSETTE LID ASSY (DECK A/B) 1 Push the EJECT button. 3 cassette lid assy 2 four claws 2-4. MECHANISM DECK ASSY (DECK A/B) 3 mechanism deck assy 1 two screws (BVTP 2.6x8) 2 two screws (BVTP 2.6x8)

  • Page 7: Service Mode

    TC-WE675 SECTION 3 SERVICE MODE KEY CHECK & DISPLAY CHECK MODE While pressing the h/BACK (A deck) and REC MUTING W (B deck) buttons with the power off, press the POWER button to turn on the power. The fluorescent display tube displays the number or special message corresponding to the button pressed.

  • Page 8: Mechanical Adjustments

    TC-WE675 SECTION 4 SECTION 5 MECHANICAL ADJUSTMENTS ELECTRICAL 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 TC-WE675 Record/Playback Head Azimuth Adjustment Tape speed Adjustment DECK A DECK B DECK A DECK B Adjust DECK A first Procedure: Procedure: 1. Forward Playback Mode – Forward Playback Mode – test tape test tape P-4-A100 WS-48B level meter (10 kHz, –10 dB)
  • Page 10 TC-WE675 Bias Consumption Current Adjustment Adjustment level: DECK A DECK B The palyback output of 10 kHz level difference against 315 Hz ref- erence should be ± 0.5 dB. This adjustment should be performed when replacing the head assy or the bias oscillator transformer (T131, T231),(T141, T241).
  • Page 11 TC-WE675 Adjustment Location: main board [MAIN board] (Component side) RV221 RV121 PB LEVEL RV101 PB LEVEL DECK B (R) DECK B (L) LEVEL (L) IC551 RV201 IC801 RV111 RV211 PB LEVEL PB LEVEL LEVEL (R) DECK A (L) DECK A (R)

  • Page 12: Diagrams

    TC-WE675 SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION TRANS (A) board ( v E) (Except SP) LEAF SW (REC/PB) board (Deck A) TRANS (B) board ( v B) POWER board ( v F) MAIN board DIRECTION board ( v C)
  • Page 13 TC-WE675 WAVEFORMS THIS NOTE IS COMMON FOR PRINTED WIRING – MAIN SECTION (3/4) – BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) 4.4Vp-p For schematic diagrams. Note: 10MHz • All capacitors are in µF unless otherwise noted. pF: µµF...

  • Page 14: Printed Wiring Board - Main Section

    TC-WE675 6-2. PRINTED WIRING BOARD – MAIN SECTION – • See page 12 for Circuit Boards Location. (Page 23) (Page 25) (Page 23) (Page 21) (Page 23) (Page 23) (Page 19) (Page 23) (Page 19)

  • Page 15: Schematic Diagram - Main (1/4) Section

    TC-WE675 6-3. SCHEMATIC DIAGRAM – MAIN (1/4) SECTION – • Semiconductor Location Ref. No. Location Ref. No. Location D306 F-10 Q104 D307 F-10 Q201 Q202 D318 F-10 (Page 17) D351 F-11 Q203 D451 Q204 (Page 22) D521 Q302 D522 Q303...

  • Page 16: Schematic Diagram - Main (2/4) Section

    TC-WE675 6-4. SCHEMATIC DIAGRAM – MAIN (2/4) SECTION – (Page 15) (Page 15) (Page 17) (Page 17) (Page 18) (Page 22) (Page 18) (Page 18) (Page (Page 18) (Page 17)

  • Page 17: Schematic Diagram - Main (3/4) Section

    TC-WE675 6-5. SCHEMATIC DIAGRAM – MAIN (3/4) SECTION – • See page 13 for Waveforms. • See page 14 for Printed Wiring Board. • See page 26 for IC Pin Functions. (Page 22) (Page 22) (Page 20) (Page (Page 24)

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

    TC-WE675 6-6. SCHEMATIC DIAGRAM – MAIN (4/4) SECTION – (Page 17) (Page 15) (Page 17) (Page 17) (Page 17) (Page 16) (Page 15) (Page (Page 22) (Page (Page...

  • Page 19: Printed Wiring Board - Deck Section

    TC-WE675 6-7. PRINTED WIRING BOARD – LEAF SW SECTION – 6-8. SCHEMATIC DIAGRAM – LEAF SW SECTION – • See page 12 for Circuit Boards Location. TO MAIN BOARD (Page 14) * PLUNGER SOLENOID is supplied as the Mechanism Deck (TCM-230ASR41B : A-2100-942-A).

  • Page 20: Schematic Diagram - Leaf Sw Section

    TC-WE675 6-9. SCHEMATIC DIAGRAM – DISPLAY SECTION – (Page 17)

  • Page 21: Printed Wiring Board - Leaf Sw Section

    TC-WE675 6-10. PRINTED WIRING BOARD – DISPLAY SECTION – • S ee page 12 for Circuit Boards Location. (Page 14) • Semiconductor Location Ref. No. Location D904 D905 D906 D907 D908 IC901 IC902 Q901...

  • Page 22: Schematic Diagram - Panel Section

    TC-WE675 6-11. SCHEMATIC DIAGRAM – PANEL SECTION – (Page 18) (Page 17) (Page 17) (Page 15, 16)

  • Page 23: Printed Wiring Board - Panel Section

    TC-WE675 6-12. PRINTED WIRING BOARD – PANEL SECTION – • See page 12 for Circuit Boards Location. (Page 14) (Page 14) (Page 14) (Page 14)

  • Page 24: Schematic Diagram - Power Section

    TC-WE675 6-13. SCHEMATIC DIAGRAM – POWER SECTION – (Page 17)

  • Page 25: Printed Wiring Board - Power Section

    TC-WE675 6-14. PRINTED WIRING BOARD – POWER SECTION – • See page 12 for Circuit Boards Location. (Page 14)

  • Page 26: Ic Pin Function

    TC-WE675 6-15. IC PIN FUNCTION • IC801 SYSTEM CONTROL (CXP82432A-007Q) (MAIN board) Pin Name Function Pin Name Function Pin No. Pin No. CD SYNC LED SYNCHRO LED driver “L”: ON PLAYSW (B) Play switch input (DECK B) CAP, M2 (B) 70U (B) 70µ...

  • Page 27: Exploded Views

    TC-WE675 SECTION 7 EXPLODED VIEWS NOTE: The components identified by • Hardware (# mark) list and accessories and pack- • Items marked “*” are not stocked since they are mark 0 or dotted line with mark ing materials are given in the last of this parts list.

  • Page 28: Chassis Section

    TC-WE675 7-2. CHASSIS SECTION US, CND T901 not supplied AEP, SP not supplied vB and vE are including into the mounted PANEL board (Ref No. 160). TRANS (B) board TRANS (A) board (EXCEPT SP) Les composants identifiés par une The components identified by...

  • Page 29: Cassette Holder Section

    TC-WE675 7-3. CASSETTE HOLDER SECTION TCM-230ASR41B TCM-230ASR41B Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4953-496-1 LID(A) ASSY, CASSETTE X-4953-542-1 HOLDER (L) ASSY, CASSETTE X-4953-497-1 LID(B) ASSY, CASSETTE 3-019-454-01 SPRING (L), LOADING 4-232-407-01 BUTTON (EJECT) 3-022-410-01 DAMPER...

  • Page 30: Front Panel Section

    TC-WE675 7-4. FRONT PANEL SECTION vA to vG are including into the mounted PANEL board (Ref No. 160). PANEL board DIRECTION board H.P board POWER board RECVOL board (Including v A to v G) not supplied supplied FLT901 not supplied Ref.

  • Page 31: Tape Mechanism Section

    TC-WE675 7-5. TAPE MECHANISM SECTION not supplied not supplied not supplied (TCM-230ASR41B) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-2100-942-A MECHANISM DECK 3-041-947-01 BELT (FR) X-3374-155-5 PINCH LEVER (FWD) ASSY 3-041-946-01 BELT (CAPSTAN B) X-3374-156-5 PINCH LEVER (REV) ASSY...

  • Page 32: Electrical Parts List

    TC-WE675 SECTION 8 HEAD RELAY ELECTRICAL PARTS LIST LEAF SW MAIN Note: • SEMICONDUCTORS The components identified by • Due to standardization, replacements in the In each case, u: µ , for example: mark 0 or dotted line with mark parts list may be different from the parts uA...: µ...
  • Page 33 TC-WE675 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C204 1-126-963-11 ELECT 4.7uF 20.00% 50V C441 1-136-293-11 FILM 0.0082uF 5.00% 100V C205 1-162-302-11 CERAMIC 0.0022uF 20.00% 16V C443 1-130-299-00 MYLAR 0.012uF 5.00% 50V C206 1-126-963-11 ELECT 4.7uF...
  • Page 34 TC-WE675 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < DIODE > < FILTER > D306 8-719-911-19 DIODE 1SS119-25 LPF101 1-233-271-11 FILTER, LOW PASS D307 8-719-911-19 DIODE 1SS119-25 LPF201 1-233-271-11 FILTER, LOW PASS D318 8-719-911-19 DIODE 1SS119-25...
  • Page 35 TC-WE675 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R102 1-247-887-00 CARBON 220K 1/4W R217 1-249-429-11 CARBON 1/4W R103 1-249-441-11 CARBON 100K 1/4W R104 1-249-420-11 CARBON 1.8K 1/4W F R218 1-249-409-11 CARBON 1/4W F R105 1-247-843-11 CARBON 3.3K...
  • Page 36 TC-WE675 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R403 1-249-437-11 CARBON 1/4W R577 1-249-428-11 CARBON 8.2K 1/4W F R404 1-249-419-11 CARBON 1.5K 1/4W F R578 1-249-428-11 CARBON 8.2K 1/4W F R411 1-249-437-11 CARBON 1/4W...
  • Page 37 TC-WE675 MAIN PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R837 1-249-434-11 CARBON 1/4W T341 1-429-222-11 TRANSFORMER, BIAS OSCILLATION R838 1-249-434-11 CARBON 1/4W R839 1-249-434-11 CARBON 1/4W T441 1-429-222-11 TRANSFORMER, BIAS OSCILLATION R840 1-249-434-11 CARBON...
  • Page 38 TC-WE675 PANEL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > S915 1-771-349-21 SWITCH, KEYBOARD (WREC MUTING (A DECK)) S916 1-771-349-21 SWITCH, KEYBOARD (j (AMS)(B DECK)) Q901 8-729-029-94 TRANSISTOR DTC143TSA S917 1-771-349-21 SWITCH, KEYBOARD (J (AMS)(B DECK))
  • Page 39 TC-WE675 Ref. No. Part No. Description Remark ACCESSORIES & PACKING MATERIALS ******************************** 1-776-263-51 CORD, CONNECTION 1-777-241-11 CORD, CONNECTION (CONTROL A1II CABLE) (CND) 4-232-596-11 MANUAL, INSTRUCTION (ENGLISH) 4-232-596-21 MANUAL, INSTRUCTION (FRENCH,SPANISH) (CND,AEP,SP) 4-232-596-31 MANUAL, INSTRUCTION (GERMAN,DUTCH,SWEDISH,ITALIAN,POLISH)(AEP) 4-232-596-71 MANUAL, INSTRUCTION (CHINESE)(SP) **************************************************************...

  • Page 40: Revision History

    TC-WE675 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. Date Description of Revision...

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