Sony Walkman WM-GX670 Service Manual
Radio cassette corder
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Also See for Walkman WM-GX670:
- Operating instructions (2 pages) ,
- Operating instructions (2 pages)
Table of Contents
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WM-GX670/GX674
SERVICE MANUAL
Ver 1.2 2002. 01
Manufactured under license from Dolby Laboratories
Licensing Corporation.
"DOLBY" and the double-D symbol a are trademarks
of Dolby Laboratories Licensing Corporation.
Radio section
Frequency range
FM: 65 – 74/87.5 – 108MHz (Eastern
Europe)
87.5 – 108MHz (other countries)
AM: 530 – 1,710kHz (North, Central,
and South America)
531 – 1,602kHz (other countries)
Tape section
Frequency response
(Dolby NR off)
Playback: 40 – 15,000Hz
Recording/playback: 100 – 8,000Hz
Output
Headphones (2 REMOTE) jack
Load impedance 8 – 300Ω
Input
Microphone (MIC) jack
General
Power requirements
1.5V
Rechargeable battery
One R6 (size AA) battery
Sony Corporation
9-926-924-12
2002A1600-1
Personal Audio Company
© 2002.1
Published by Sony Engineering Corporation
Photo: WM-GX670
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
SPECIFICATIONS
Dimensions (w/h/d)
Mass
Supplied accessories
Design and specifications are subject to change without notice
RADIO CASSETTE CORDER
US Model
AEP Model
UK Model
Australian Model
WM-GX670
Chinese Model
E Model
WM-GX670/GX674
WM-EX677
MT-WMGX670-162
Approx. 108.4 × 77.7 × 23.8 mm
× 3
×
(4
3
/
1
/
15
/
inches), incl.
8
8
16
projecting parts and controls
Approx. 250g (8.9oz)
Approx. 315g (11.2oz) incl.
rechargeable battery and a cassette
Battery case (1)
Stereo earphones with remote control (1)
Battery charge (1)
AC plug adaptor (1) (except for European,
Australian, Saudi Arabian, Chinese, Hong Kong,
U.S.A., Canadian, and Korean model)
Rechargeable battery (NC-6WM, 1.2V, 600mAh,
Ni-Cb) (1)
Rechargeable battery carring case (1)
Carrying pouch (1)
Stereo microphone (1)
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Table of Contents
Related Manuals for Sony Walkman WM-GX670
Summary of Contents for Sony Walkman WM-GX670
- Page 1 General Stereo microphone (1) Power requirements 1.5V Rechargeable battery Design and specifications are subject to change without notice One R6 (size AA) battery RADIO CASSETTE CORDER Sony Corporation 9-926-924-12 2002A1600-1 Personal Audio Company © 2002.1 Published by Sony Engineering Corporation...
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Page 2: Table Of Contents
LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE circuit board (within 3 times). COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS • Be careful not to apply force on the conductor when soldering APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS or unsoldering. -
Page 3: Service Note
SECTION 1 SERVISE NOTE [Service Mode] The service mode enables to operate the mechanism of WM-GX670/ 3. FF, REW modes GX674 while the MAIN board is opened. Check that the PRE-SET status is set. Rotation of the idler gear (A) (S side) is detected using the photo- Connect square wave or sine wave to resistor (R43). - Page 4 [ Slider (NR) ] [ Tape drive mechanism ] Tape drive mechanism in PLAY mode Gear (NR) (FWD : Left side REV : Right side) Idler Gear Idler Gear (A)(S side) Slider (NR) (A)(T side) Gear Gear (REEL)(S side) (REEL)(T side) Motor Pulley Cam Gear F side R side...
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Page 5: General
!¶ MIC (PLUG IN POWER) jack !¢ !£ !™ !¡ !º LOCATION OF REMOTE CONTROL (WM-GX670 model) 1 FF, PRESET+ button 2 “ ” • p, RADIO ON/BAND OFF button 3 HOLD knob 4 REW, PRESET– button 5 VOL knob LOCATION OF REMOTE CONTROL... -
Page 6: Disassembly
SECTION 3 DISASSEMBLY Note : Disassemble the unit in the order as shown below. Case block Reel ornament Cassette lid assembly Main board assembly assembly Motor (F2) Holder Pinch lever (N/R) Magnetic head Belt (F2) (M901) assembly assembly (HP901) Note : Follow the disassembly procedure in the numerical order given. -
Page 7: Belt (F2)
3-2. BELT (F2) 3 Belt (F2) 2 Terminal board (Battery ’ ) 1 Remove solder from the battery terminal board. 3-3. CASSETTE LID ASSEMBLY 5 Cassette lid assembly 2 Two screws (M1.4 2.0) 1 Screw (M1.4 2.0) 4 Shaft 3 Open the cassette lid —... -
Page 8: Reel Ornament Assembly
3-4. REEL ORNAMENT ASSEMBLY 1 Reel Ornament assembly Remove the assembly while removing Note: the three claws and boss carefully. Claw Claw 3-5. MAIN BOARD 6 Screw (B1.7 8 Remove soldeing tapping 2 Screw (M1.4) (two points) from plunger solenoid. 5 Screw (B1.7 tapping 3 Screw (B1.4... -
Page 9: Motor (F2) (M901)
3-6. MOTOR (F2) (M901) 1 Two screw (M1.4) 2 Motor (F2) (M901) Toothed lock 3-7. HOLDER ASSEMBLY 4 Screw (M1.4) 7 Cassette bracket assembly 5 Lock lever (S) 8 Flexible board 2 Shaft 9 Remove the holder assembly in the direction of the arrow. -
Page 10: Pinch Lever (N)/(R) Assembly
3-8. PINCH LEVER (N) / (R) ASSEMBLY Claw 2 Remove the pinch lever (N) assembly in the direction of the arrow. Claw Note: Be careful of the claw 1 Remove the pinch lever (R) assembly in the direction of the arrow. Note: Be careful of the claw 3-9. -
Page 11: Mechanical Adjustment
SECTION 4 SECTION 5 MECHANICAL ADJUSTMENT ELECTRICAL ADJUSTMENT PRECAUTION PRECAUTION Clean the following parts with a denatured-alcohol-moistened Specified voltage: 1.3 V (DC) swab: Switch and control position record/playback/erase head pinch roller MENU switch rubber belts capstan : OFF Demagnetize the record/playback/erase head with a head AVLS : OFF demagnetizer. - Page 12 FM VCO Adjustment TUNER SECTION 0dB=1µV Procedure : FM RF signal [AM] generator BAND switch : AM 0.01 F AM RF signal to ANT (TP1) generator Put the lead-wire antenna close to Carrier frequency : 98MHz the set. IModulation : no modulation Output level : 0.1V (100dB) 30% amplitude modulation by 400Hz 1.
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Page 13: Diagrams
WM-GX670/GX674 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM — 13 — — 14 — — 15 —... -
Page 14: Printed Wiring Board
WM-GX670/GX674 6-2. PRINTED WIRING BOARD • Semiconductor Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location Note on Printed Wiring Board: A-14 D801 C-19... -
Page 15: Schematic Diagram (1/2)
WM-GX670/GX674 Note ) : FM • All capacitors are in µF unless otherwise noted. pF: µµF ] : AM 50 WV or less are not indicated except for electrolytics < > : PLAY (TAPE) and tantalums. • Voltages are taken with a VOM (Input impedance 10 M ). -
Page 16: Schematic Diagra (2/2)
WM-GX670/GX674 6-4. SCHEMATIC DIAGRAM (2/2) • Waveform Note • All capacitors are in µF unless otherwise noted. pF: µµF no mark : REC/PLAY IC3 &¢ XOUT 5 sec/div IC2 !¶ VCO 5 sec/div IC801 5 PLAY 5 sec/div 50 WV or less are not indicated except for electrolytics ) : REC (TAPE) 0.5V/div... -
Page 17: Ic Block Diagrams
6-5. IC BLOCK DIAGRAMS TA7371AF-EL TA2022AFN-EL IC301 TA2123F (EL) 36 35 – SYSTEM CONTROL N.C. VCC2 MIC IN L RF IN V REF PW GND – V REF NF L OUT B PW B RADIO IN L OUT C C-AMP SW 37 MT TC PW A PW C... -
Page 18: Ic Pin Function Discription
6-6. IC PIN FUNCTION DESCRIPTION IC3 TC9327AF-604 Pin No. Pin Name Description Pin No. Pin Name Description COM 1 to MOTOR DIR MOTOR control terminal. 1 to 4 Common terminal. COM 4 TAPE TAPE detect terminal. (L: ON, H: OFF) 5 to 22 S1 to S18 Segment output terminal. -
Page 19: Exploded Views
SECTION 7 Ver 1.1 2000.08 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number The components identified by mark ! or have some differences from the original one. in the exploded views are not supplied. dotted line with mark ! are critical for safety. -
Page 20: Mechanism Deck Block
7-2. MECHANISM DECK BLOCK (MT-WMGX670-162) M901 PM901 HP901 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks X-3376-293-1 HOLDER (F) ASSY 3-007-433-01 SHEET (N), REFLECTION X-3377-228-1 LEVER (R) ASSY, PINCH X-3376-291-1 CHASSIS ASSY (F) 3-029-271-01 SPRING (HD) 3-010-274-02 TABLE, REEL X-3377-227-1 LEVER (N) ASSY, PINCH 3-010-954-01 SPRING (BT), COMPRESSION... -
Page 21: Electrical Parts List
SECTION 8 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • CAPACITORS: • SEMICONDUCTORS parts list may be different from the parts uF: µF In each case, u: µ, for example: specified in the diagrams or the components •... - Page 22 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C210 1-164-677-11 CERAMIC CHIP 0.033uF C531 1-115-156-11 CERAMIC CHIP C211 1-164-227-11 CERAMIC CHIP 0.022uF (EXCEPT GX670: FR) C301 1-119-663-11 TANTAL. CHIP 47uF 2.5V C532 1-162-957-11 CERAMIC CHIP 220PF C302 1-107-815-11 TANTAL.
- Page 23 Ver 1.2 2002. 01 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < FUSE > < TRANSISTOR > 1-533-792-11 FUSE (SMD) (0.25A/125V) 8-729-037-89 TRANSISTOR 2SC4627J-C (TX).SO 8-729-028-69 TRANSISTOR 2SC4655-BC (TX) < FERRITE BEAD > 8-729-037-89 TRANSISTOR 2SC4627J-C (TX).SO 8-729-037-89 TRANSISTOR 2SC4627J-C (TX).SO 1-500-445-21 FERRITE 8-729-231-96 TRANSISTOR 2SK880GR-TE85L...
- Page 24 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 1-216-817-11 METAL CHIP 1/16W 1-216-833-11 METAL CHIP 1/16W 1-216-845-11 METAL CHIP 100K 1/16W 1-216-833-11 METAL CHIP 1/16W 1-216-853-11 METAL CHIP 470K 1/16W 1-216-845-11 METAL CHIP 100K 1/16W 1-216-817-11 METAL CHIP 1/16W 1-216-853-11 METAL CHIP...
- Page 25 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R309 1-216-841-11 METAL CHIP 1/16W < COMPOSITION CIRCUIT BLOCK > R310 1-216-845-11 METAL CHIP 100K 1/16W R311 1-216-841-11 METAL CHIP 1/16W 1-233-811-21 RES, NETWORK 470K (3216) R312 1-216-845-11 METAL CHIP 100K 1/16W...
- Page 26 WM-GX670/GX674 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks ACCESSORIES & PACKING MATERIALS 3-864-892-11 MANUAL, INSTRUCTION (ENGLISH/FRENCH) (GX670: AEP, FR, UK, AUS, CH, EA) ******************************* 3-864-892-21 MANUAL, INSTRUCTION 1-418-019-11 REMOTE CONTROL UNIT (EXCEPT GX670: FR) (SPANISH/PORTUGUESE)
- Page 27 WM-GX670/GX674 MEMO...
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Page 28: Revision History
WM-GX670/GX674 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 1999.01...