Sony WM-EX921 free download

File name WM-EX921.pdf

WM-EX921 SERVICE MANUAL Ver 1.0 2001.10 AEP Model E Model Chinese Model Tourist Model Manufactured under license from Dolby Laboratories. "Dolby" and the double-D symbol are trademarks of Dolby Laboratories. Model Name Using Similar Mechanism Tape Transport Mechanism Type NEW MT-WMEX921-162 SPECIFICATIONS Frequency response (Dolby NR off) Playback: 30 - 18 000 Hz Output Headphones (i jack) Load impedance 8 - 300 Power requirements 1.5 V One rechargeable battery Dimensions (w/h/d) Approx. 77.1 Ч 108.8 Ч 20.2 mm Mass Approx. 147 g Supplied accessories Stereo headphones or earphones with remote control (1) Battery charging stand (1) AC power adaptor (1) Rechargeable battery (NH-14WM (A), 1.2 V, 1 350 mAh (MIN), Ni-MH) (1) Rechargeable battery carrying case (1) Carrying pouch (1) Design and specifications subject to change without notice. Battery life (Approx. hours) (in playback) Rechargeable NH-14WM (A) fully charged (JEITA*) 45 * Measured value by the standard of JEITA (Japan Electronics and Information Technology Industries Association). (Using a Sony HF series cassette tape) Note · The battery life may be shorter depending on the operating condition and the surrounding temperature. CASSETTE PLAYER 9-873-307-01 2001J0500-1 C 2001.10 Sony Corporation Personal Audio Company Published by Sony Engineering Corporation WM-EX921 TABLE OF CONTENTS 1. 2. 3. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. Note on the AC power adaptor Use only the supplied AC power adaptor. Do not use any other AC power adaptor. Polarity of the plug SERVICING NOTES ... 3 GENERAL ... 5 DISASSEMBLY Disassembly Flow ... Case Section ... MAIN Board ... Belt (F0) ... Motor, DC (Capstan/Reel) (M601) ... Lid Assy, Cassette ... Ornament (Open) Block Assy ... Holder (FA) Assy ... "Lever (N2) Assy, Pinch", "Lever (R2) Assy, Pinch" ... Head, Magnetic (Playback) (HP901) ... 6 6 7 7 8 8 9 9 10 10 Notes on chip component replacement · Never reuse a disconnected chip component. · Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing · Keep the temperature of the soldering iron around 270 °C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). · Be careful not to apply force on the conductor when soldering or unsoldering. UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the l