Sony WM-FX171 Service Manual
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Sony WM-FX171 Service Manual

Sony WM-FX171 Service Manual

Radio cassette player
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See also: Operating Instructions
WM-FX171/FX173/FX177
SERVICE MANUAL
MICROFILM
Photo : WM-FX173
SPECIFICATIONS
• Frequency range
FM : 87.6 - 107.9 MHz
AM : 531 - 1,602 kHz
• Power requirements
3V DC batteries R6 (AA) × 2 / External DC 3V power sources
• Dimensions
FX173 : 88.5 × 118.6 × 38.2 mm
× 4
× 1
(3
1
/
3
/
9
/
inches) (w / h / d) incl. projecting parts and controls
2
4
16
FX171/FX177 : 88.5 × 118.6 × 37.6 mm
× 4
× 1
(3
1
/
3
/
1
/
inches) (w / h / d) incl. projecting parts and controls
2
4
2
• Mass
FX173 : Approx. 165 g (5.9 oz) / Approx. 245g (8.7 oz) incl. batteries
and a cassette
FX171/FX177 : Approx. 160 g (5.7 oz) / Approx. 240 g (8.5 oz) incl.
batteries and a cassette
• Supplied accessories
Stereo headphone or Stereo earphones (1) / Belt clip (1)
Design and specifications are subject to change without notice.
Canadian Model
Model Name Using Similar Mechanism
Tape Transport Mechanism Type
RADIO CASSETTE PLAYER
WM-FX173/FX177
AEP Model
E Model
WM-FX171/FX173
NEW
MF-WMFX171-114

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Summary of Contents for Sony WM-FX171

  • Page 1 WM-FX171/FX173/FX177 SERVICE MANUAL Canadian Model WM-FX173/FX177 AEP Model E Model WM-FX171/FX173 Photo : WM-FX173 Model Name Using Similar Mechanism Tape Transport Mechanism Type MF-WMFX171-114 SPECIFICATIONS • Frequency range FM : 87.6 - 107.9 MHz AM : 531 - 1,602 kHz •...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS Flexible Circuit Board Repairing GENERAL ······································································ 2 • Keep the temperature of the soldering iron aroud 270˚ C during repairing. DISASSEMBLY • Do not touch the soldering iron on the same conductor of the 2-1. Cabinet (Front) Assy ·························································· 3 circuit board (within 3 times).

  • Page 3: Disassembly

    SECTION 2 DISASSEMBLY • This set can be disassembled in the order shown below. 2-1. CABINET (FRONT) ASSY 2-2. MAIN BOARD 2-4. MECHANISM DECK 2-5. BELT, MOTOR (REEL/CAPSTAN) 2-3. CASSETTE LID Note : Follow the disassembly procedure in the numerical order given. 2-1.

  • Page 4: Main Board

    2-2. MAIN BOARD 3 Remove the four solders. 4 Screw (M 1.4), toothed lock (WH) 2 Flexible board (CN302) 6 MAIN board 1 Head flexible board (CN301) 5 Two claws 2-3. CASSETTE LID 2 Insert a precision screwdriver (1.4 mm flat-blade) vertically into portion A to release the 5 Spring (torsion) hinge plate.

  • Page 5: Mechanism Deck

    2-4. MECHANISM DECK 2 Remove the mechanism deck in the direction of the arrow, 1 Insert the precision screwdriver (1.4 mm flat-blabe) in to the slit and release two claws. 2-5. BELT, MOTOR (REEL/CAPSTAN) 2 Two screws [screw (M 1.4), special head] 3 Motor (reel/capstan) 1 Belt —...

  • Page 6: Mechanical Adjustment

    SECTION 3 SECTION 4 MECHANICAL ADJUSTMENT ELECTRICAL ADJUSTMENT PRECAUTION PRECAUTION Clean the following parts with a denatured-alcahol-moistened Specified voltage : 3.0V sweb : Switch position Playback head Pinch roller AVLS switch : NORM Rubber belt Capstan CASSETTE SECTION Demagnetize the playback head using a demagnetizer. Do not use a magnetized screwdriver for adjustments.
  • Page 9 WM-FX171/FX173/FX177 5-2. SCHEMATIC DIAGRAM (FX171/FX177 MODELS) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.
  • Page 10 WM-FX171/FX173/FX177 5-3. PRINTED WIRING BOARD (FX171/FX177 MODELS) • Semiconductor Location Ref. No. Location D120 G-13 MEGA BASS UNIT MAIN BOARD MAIN BOARD M901 (SIDE A) (SIDE B) F-14 REEL/CAPSTAN IC301 E-17 MOTOR IC601 E-18 S305 G-14 AVLS Q101 E-15 DRY BATTERY...
  • Page 11 WM-FX171/FX173/FX177 5-4. PRINTED WIRING BOARD (FX173 MODEL) • Semiconductor Location MEGA BASS UNIT Ref. No. Location D120 G-13 HIGH MAIN BOARD MAIN BOARD M901 (SIDE A) (SIDE B) REEL/CAPSTAN F-14 HIGH MOTOR IC301 E-17 IC601 E-18 S305 G-14 AVLS DRY BATTERY...

  • Page 12: Schematic Diagram

    WM-FX171/FX173/FX177 5-5. SCHEMATIC DIAGRAM (FX173 MODEL) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.

  • Page 16: Main Board Section

    6-2. MAIN BOARD SECTION MF-WMFX171-114 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-015-285-01 SCREW (M1.4), TOOTHED LOCK (WH) A-3021-036-A MAIN BOARD, COMPLETE (FX171: EA) A-3021-046-A MAIN BOARD, COMPLETE (FX173: C&SA) A-3021-035-A MAIN BOARD, COMPLETE (FX171: E) A-3021-033-A MAIN BOARD, COMPLETE (FX177) A-3021-007-A MAIN BOARD, COMPLETE (FX171: AEP) A-3021-047-A MAIN BOARD, COMPLETE (FX173: IT)
  • Page 17 6-3. MECHANISM SECTION-1 (MF-WMFX171-114) HP901 M901 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-013-560-11 BELT X-3369-749-1 PINCH LEVER (N) ASSY 3-703-816-31 SCREW (M1.4), SPECIAL HEAD 3-920-996-01 SPRING (PINCH N) 3-921-042-01 GEAR (REEL) HP901 1-667-291-11 HEAD FLEXIBLE BOARD(W/PLAYBACK HEAD) 3-703-816-73 SCREW (M1.4), SPECIAL HEAD M901 1-763-073-11 MOTOR...
  • Page 18 6-4. MECHANISM SECTION-2 (MF-WMFX171-114) Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-921-797-01 WASHER 3-923-530-01 SLEEVE (M) 3-921-003-01 BEARING 3-921-335-01 WASHER, LEVER 3-938-628-01 SPRING (PLAY-CP) 3-920-990-01 SPRING (UD), COMPRESSION 3-920-999-01 GEAR (A) 3-921-050-01 GEAR (B) X-3369-752-1 CLUTCH ASSY X-3372-619-1 WHEEL ASSY (NP), CAPSTAN 3-013-142-01 SPRING (FR-CP) 3-921-043-01 GEAR (D)
  • Page 19 SECTION 7 MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • RESISTORS When indicating parts by reference number, parts list may be different from the parts All resistors are in ohms. please include the board name. specified in the diagrams or the components METAL: metal-film resistor •...
  • Page 20 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C305 1-126-176-11 ELECT 220uF < DIODE > C306 1-115-156-11 CERAMIC CHIP C308 1-126-162-11 ELECT 3.3uF D120 8-719-067-62 DIODE LNJ210C6AOSO (BATT) C309 1-165-176-11 CERAMIC CHIP 0.047uF (FX171, FX177) <...
  • Page 21 WM-FX171/FX173/FX177 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R103 1-216-835-11 METAL CHIP 1/16W < VARIABLE RESISTOR > R104 1-216-835-11 METAL CHIP 1/16W R105 1-216-855-11 METAL CHIP 680K 1/16W RV301 1-225-362-11 RES, VAR, CARBON (VOLUME)
  • Page 22 Canadian Model SERVICE MANUAL WM-FX173/FX177 AEP Model 1999. 01 E Model Chinese Model WM-FX171/FX173 Tourist Model SUPPLEMENT-1 WM-FX171 File this supplement with the Service Manual. Subject : 1. Parts list addition of WM-FX171(US/Tourist/Chinese), WM-FX173 (Chinese) models 2. Circuit Board chenge...
  • Page 23 • DIFFERENT PARTS LIST Page Before Change After Change Ref. No. Part No. Description Remarks Part No. Description Remarks 3-022-292-01 CABINET (REAR) (BLACK) 3-022-292-01 CABINET (REAR) (BLACK) (PA, E, C&SA, EA) (PA, E, C&SA, EA,US,CH,JE) 3-022-292-21 CABINET (REAR) (BLUE) 3-022-292-21 CABINET (REAR) (BLUE) (FX173: E, C&SA, EA,CH) (FX173: E, C&SA, EA) 3-022-292-41 CABINET (REAR) (GREEN)

  • Page 24: Schematic Diagram (Fx171/Fx177 Models)

    WM-FX171/FX173/FX177 SCHEMATIC DIAGRAM (FX171/FX177 MODELS) — 3 — — 4 —...

  • Page 25: Printed Wiring Board (Fx171/Fx177 Models)

    WM-FX171/FX173/FX177 PRINTED WIRING BOARD (FX171/FX177 MODELS) IT, EA MODEL • Semiconductor Location Ref. No. Location D120 G-14 F-14 IC301 E-18 IC601 E-19 G-14 Q101 E-16 Q201 E-16 Q301 F-17 Q302 F-14 — 5 — — 6 — — 7 —...

  • Page 26: Printed Wiring Board (Fx173 Model)

    WM-FX171/FX173/FX177 PRINTED WIRING BOARD (FX173 MODEL) • Semiconductor Location Ref. No. Location D120 G-14 F-15 IC301 E-18 IC601 E-19 G-14 Q101 E-16 Q201 E-16 Q301 F-17 Q302 F-15 — 8 — — 9 — — 10 —...

  • Page 27: Schematic Diagram (Fx173 Model)

    WM-FX171/FX173/FX177 SCHEMATIC DIAGRAM (FX173 MODEL) — 11 — — 12 —...

  • Page 28: Electrical Parts List

    SECTION 7 MAIN MAIN ELECTRICAL PARTS LIST NOTE: Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks • Due to standardization, replacements in the • RESISTORS When indicating parts by reference number, C107 1-115-156-11 CERAMIC CHIP < CONNECTOR > parts list may be different from the parts All resistors are in ohms.
  • Page 29 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < TRANSISTOR > R306 1-216-835-11 METAL CHIP 1/16W (FX171/FX177) 8-729-216-22 TRANSISTOR 2SA1162-G R306 1-216-825-11 METAL CHIP 2.2K 1/16W Q101 8-729-207-65 TRANSISTOR RN1410 (FX173) Q201 8-729-207-65 TRANSISTOR RN1410 R308 1-216-835-11 METAL CHIP 1/16W...
  • Page 30 WM-FX171/FX173/FX177 Ref. No. Part No. Description Remarks ACCESSORIES & PACKING MATERIALS ******************************** 1-505-521-11 HEADPHONE (MDR-023) (US, AEP, IT, FR, EE, CND) 1-528-179-11 BATTERY, NICKEL CADMIUM (FX177) 1-528-763-11 BATTERY, CHARGER (BC-810U) (FX177) 3-020-998-01 CLIP, BELT 3-861-489-11 MANUAL, INSTRUCTION (ENGLISH) (US, CND)

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Wm-fx173Wm-fx177

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