Sony operating instructions personal audio walkman wm-ex382 (2 pages)
Summary of Contents for Sony Walkman WM-EX170
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WM-EX170/EX172 SERVICE MANUAL Canadian Model WM-EX170 AEP Model E Model WM-EX170/172 Photo : WM-EX172 Manufactured under license from Dolby Laboratories Model Name Using Similar Mechanism Licensing Corporation. Tape Transport Mechanism Type MT-WMEX170-114 “DOLBY” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation.
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).
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.
2-2. MAIN BOARD 3 Remove the four solders. 4 Screw (M1.4), toothed lock (WH) 2 Flexible board (CN302) 6 MAIN board 5 Two claws 1 Head flexible board (CN301) 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.
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 screw [screw (M1.4), special head] 3 Motor (reel/capstan) 1 Belt —...
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 DOLBY NR switch : OFF (EX172 MODEL) Rubber belt Capstan AVLS switch : NORM Demagnetize the playback head using a demagnetizer.
WM-EX170/EX172 SECTION 5 DIAGRAMS 5-1. BLOCK DIAGRAM MAIN BOARD EX172 MODEL EX170 MODEL MEGA BASS UNIT MEGA BASS UNIT S352 S351 S351 RV351 RV352 DOLBY NR MEGA BASS MEGA BASS HIGH ON – OFF OFF – ON OFF – ON...
WM-EX170/EX172 5-3. SCHEMATIC DIAGRAM (EX170 MODEL) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF • Voltages are taken with a VOM (Input impedance 10 MΩ). 50 WV or less are not indicated except for electrolytics Voltage variations may be noted due to normal produc- and tantalums.
WM-EX170/EX172 5-5. SCHEMATIC DIAGRAM (EX172 MODEL) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF Voltage variations may be noted due to normal produc- 50 WV or less are not indicated except for electrolytics tion tolerances.
SECTION 6 EXPLODED VIEWS NOTE: • The mechanical parts with no reference number : Central and South America. • -XX, -X mean standardized parts, so they may have some differences from the original one. in the exploded views are not supplied. : Country of origin is not shown.
6-3. MECHANISM SECTION-1 (MT-WMEX170-114) HP901 M901 Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 3-013-560-11 BELT 3-920-996-01 SPRING (PINCH N) 3-703-816-31 SCREW (M1.4), SPECIAL HEAD M901 1-763-073-11 MOTOR 3-019-776-01 GEAR (REEL-S) HP901 1-500-517-11 HEAD, MAGNETIC (PLAYBACK) 3-703-816-73 SCREW (M1.4), SPECIAL HEAD X-3369-749-1 PINCH LEVER (N) ASSY —...
SECTION 7 MAIN ELECTRICAL PARTS LIST NOTE: • Items marked “*” are not stocked since they • COILS are seldom required for routine service. Some uH: µH When indicating parts by reference number, delay should be anticipated when ordering these •...
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MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C323 1-163-009-11 CERAMIC CHIP 0.001uF JR313 1-216-296-91 SHORT C324 1-163-009-11 CERAMIC CHIP 0.001uF JR314 1-216-296-91 SHORT (EX170) JR315 1-216-296-91 SHORT C324 1-163-038-91 CERAMIC CHIP 0.1uF JR316 1-216-296-91 SHORT 0 (EX172) (EX172) JR317...
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WM-EX170/EX172 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R306 1-216-077-00 METAL CHIP 1/10W ACCESSORIES & PACKING MATERIALS (EX170) ******************************* R306 1-216-057-00 METAL CHIP 2.2K 1/10W (EX172) 1-505-521-11 HEADPHONES (MDR-023)(EXCEPT E,6E,9E) R309 1-216-113-00 METAL CHIP...