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SERVICE MANUAL
Ver 1.2 2002. 11
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 : 87.5 – 108MHz
AM : 531 – 1.602 kHz
Tape section
Frequency response
(Dolby NR off)
Playback: 40 – 15,000Hz
Output
Headphones (2 REMOTE) jack
Load impedance 8 – 300 Ω
General
Power requirements
1.5V
Rechargeable battery
One R6 (size AA) battery
Approx. 108.9 × 77.7 × 23.9 mm
Dimensions (w/h/d)
3
(4
/
8
projecting parts and controls
Sony Corporation
9-926-978-13
2002K1600-1
Personal Audio Company
© 2002.11
Published by Sony Engineering Corporation
SPECIFICATIONS
× 3
×
1
31
/
/
inches), incl.
8
32
WM-FX671
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
Mass
Approx. 145 g (5.2 oz)
Approx. 210 g (7.5oz) incl.
rechargeable battery and a cassette
Supplied accessories
Battery case (1)
Stereo earphones (1)
Battery charge (1)
Rechargeable battery (NC-6WM, 1.2V, 600mAh,
Ni-Cb) (1)
Rechargeable battery carring case (1)
Carrying pouch (1)
Design and specifications are subject to change without notice
RADIO CASSETTE PLAYER
US Model
AEP Model
WM-EX678
MT-WMEX672-162
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Related Manuals for Sony WM-FX671
Summary of Contents for Sony WM-FX671
- Page 1 One R6 (size AA) battery Approx. 108.9 × 77.7 × 23.9 mm Dimensions (w/h/d) × 3 × inches), incl. projecting parts and controls RADIO CASSETTE PLAYER Sony Corporation 9-926-978-13 2002K1600-1 Personal Audio Company © 2002.11 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
Rotation of the idler gear (A) (S side) is detected using the photo- Connect square wave or sine wave to resistor (R43). (See reflector (PH1) in the WM-FX671. PH1 is located on the MAIN illustration below.) board, therefore the rotation of the idler gear (A) (S side) cannot be Press the p switch (S3) to enter the STOP mode. - 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
SECTION 2 GENERAL • LOCATION OF CONTROLS !¢ !£ !™ !¡ !º 1 2 REMOTE jack 2 REW, AMS button 3 “ ”, REPEAT button 4 FF, AMS button 5 OPEN knob 6 Battery case 7 Display window 8 HOLD c knob 9 SET button !º... -
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 ’ ) Belt threading Belt (F2) 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 7 Screw (B1.7 × 3) 9 Remove soldeing tapping 3 Screw (M1.4) (two points) from plunger solenoid. 6 Screw (B1.7 ×... -
Page 9: Motor (F2) (M901)
3-6. MOTOR (F2) (M901) 1 Two screws (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 Remove soldering from Head flexible board. 9 Head flexible board 2 Shaft 0 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 playback head pinch roller MENU switch rubber belts capstan : OFF Demagnetize the playback head with a head demagnetizer. AVLS : OFF Do not use a magnetized screwdriver for the adjustments. - Page 12 FM VCO Adjustment TUNER SECTION 0dB=1µV Procedure : FM RF signal [AM] generator BAND switch : AM 0.01 µ 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-FX671 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM — 13 — — 14 — — 15 —... -
Page 14: Printed Wiring Board
WM-FX671 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 A-14 D304 D-18 D-15 C-15 Q602 C-19 Note on Printed Wiring Board: B-14 D305... -
Page 15: Schematic Diagram (1/2)
WM-FX671 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. • All resistors are in Ω and •... -
Page 16: Schematic Diagram (2/2)
WM-FX671 6-4. SCHEMATIC DIAGRAM (2/2) • Waveform Note • All capacitors are in µF unless otherwise noted. pF: µµF • Voltages are taken with a VOM (Input impedance 10 MΩ). IC3 &¢ XOUT 5µsec/div IC2 !¶ VCO 5µsec/div IC801 5 PLAY 5µsec/div... -
Page 17: Ic Block Diagrams
6-5. IC BLOCK DIAGRAMS TA7371AF-EL TA2022AFN-EL SYSTEM CONTROL N.C. VCC2 MIC IN L V REF NF L V REF RADIO IN L REV REC L MIC IN R REV REC R NF R FWD REC R RADIO IN R FWD REC L MIC OUT R VCC2 MIC OUT L... - Page 18 IC301 TA2123AF (EL) 36 35 – RF IN PW GND – OUT B PW B OUT C C-AMP SW 37 MT TC PW A PW C OUT A – BEEP 39 BEEP AMS OUT 40 RIPPLE BASE FILTER MT SW 41 RF OUT PW SW 42 SWITCH...
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Page 19: Ic Pin Function Description
6-6. IC PIN FUNCTION DESCRIPTION • IC3 TC9327AF-604 Pin No. Pin Name Description COM 1 to 1 to 4 Common terminal. COM 4 5 to 22 S1 to S18 Segment output terminal. DOLBY VCC Dolby control terminal. (L: ON, Hi-imp: OFF) S1/2 CTL Motor speed control terminal. - Page 20 Pin No. Pin Name Description MOTOR DIR MOTOR control terminal. TAPE TAPE detect terminal. (L: ON, H: OFF) REC CTL — Not used AVLS CTL Terminal for controlling AVLS (when ON=H). BST CTL Tone control terminal (L: normal, Hi-imp: MEGA BASS). RV CTL Revive control terminal.
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Page 21: Exploded Views
Ver 1.2 2002.11 SECTION 7 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 22: Mechanism Deck Block
7-2. MECHANISM DECK BLOCK (MT-WMEX672-162) M601 PM901 HP901 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks X-3377-039-1 HOLDER ASSY (/M) 3-007-433-01 SHEET (N), REFLECTION X-3377-363-1 PINCH LEVER (R) ASSY X-3377-037-1 CHASSIS ASSY (F) (/M) 3-029-271-01 SPRING (HD) 3-010-274-02 TABLE, REEL X-3377-362-1 PINCH LEVER (N) ASSY 3-010-954-01 SPRING (BT), COMPRESSION... -
Page 23: 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 24 Ver 1.1 2002.01 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C308 1-117-181-11 TANTAL. CHIP 4.7uF 2.5V < FUSE > C309 1-135-149-21 TANTALUM CHIP 2.2uF C310 1-164-360-11 CERAMIC CHIP 0.1uF 1-533-792-11 FUSE (SMD)(0.25A/125V) C311 1-165-112-11 CERAMIC CHIP 0.33uF C312 1-165-128-11 CERAMIC CHIP...
- Page 25 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < TRANSISTOR > 1-216-833-91 RES,CHIP 1/16W 1-216-853-11 METAL CHIP 470K 1/16W 8-729-037-89 TRANSISTOR 2SC4627J-C(TX).SO 1-216-845-11 METAL CHIP 100K 1/16W 8-729-028-69 TRANSISTOR 2SC4655-BC(TX) 1-216-839-11 METAL CHIP 1/16W 8-729-037-89 TRANSISTOR 2SC4627J-C(TX).SO 1-216-833-91 RES,CHIP 1/16W 8-729-037-89 TRANSISTOR 2SC4627J-C(TX).SO...
- Page 26 WM-FX671 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R109 1-216-831-11 METAL CHIP 6.8K 1/16W < SWITCH > R110 1-216-825-11 METAL CHIP 2.2K 1/16W R111 1-216-849-11 METAL CHIP 220K 1/16W 1-771-475-21 SWITCH, SLIDE (REV/STOP/FWD) R112...
- Page 27 MEMO...
- Page 28 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 1993.03 2002.01 Correction of Part No.