Sony WM-EX678 free download

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WM-EX678 SERVICE MANUAL Ver 1.0 1999 . 01 AEP Model UK Model Manufactured under license from Dolby Laboratories Licensing Corporation. "DOLBY" and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Model Name Using Similar Mechanism Tape Transport Mechanism Type NEW MT-WMEX672-162 SPECIFICATIONS Tape section Frequency response (Dolby NR off) Output General Power requirements Mass Playback : 30 ­ 18,000 Hz Headphones (REMOTE 2 jack) Load impedance 8 ­ 300 1.5 V One rechargeable battery or one R6 (size AA) battery Approx. 77.7 Ч 109.1 Ч 21.4 mm (31/8 Ч 43/8 Ч 27/32 inches), incl. projecting parts and controls Approx. 140 g (5.0 oz.) Approx. 205 g (7.3 oz) (incl. rechargeable battery and cassette) Battery case (1) Stereo earphones with remote control (1) Battery charger (1) Rechargeable battery (NC-6WM, 1.2 V, 600 mAh, Ni-Cd) (1) Rechageable battery carrying case (1) Carrying pouch (1) Supplied accessories Dimensions (w/h/d) Design and specification subject to change without notice. CASSETTE PLAYER MICROFILM TABLE OF CONTENTS 1. SERVICE NOTE ······························································· 3 2. GENERAL ·········································································· 5 3. DISASSEMBLY 3-1. CASE BLOCK ASSEMBLY ·········································· 7 3-2. MAIN BOARD ······························································· 8 3-3. BELT (F2) ······································································· 8 3-4. MOTOR (F2) (M901) ····················································· 9 3-5. CASSETTE LID ASSEMBLY ······································· 9 3-6. REEL ORNAMENT ASSEMBLY ······························· 10 3-7. HOLDER ASSEMBLY ················································ 10 3-8. PINCH LEVER (N)/(R) ASSEMBLY ·························· 11 3-9. MAGNETIC HEAD (HP901) ······································· 11 4. MECHANICAL ADJUSTMENT ································ 12 5. ELECTRICAL ADJUSTMENT ·································· 12 6. DIAGRAMS 6-1. BLOCK DIAGRAM ····················································· 13 6-2. IC BLOCK DIAGRAMS ·············································· 15 6-3. PRINTED WIRING BOARD ······································· 16 6-4. SCHEMATAC DIAGRAM ··········································· 19 6-5. IC PIN FUNCTION ······················································ 22 7. EXPLODED VIEWS 7-1. CABINET BLOCK, MAIN BOARD ··························· 24 7-2. MECHANISM DECK BLOCK ···································· 25 8. ELECTRICAL PARTS LIST ······································· 26 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 soldering iron around 270°C during repairing. · Do not touch the soldering iron on the same conductor of the circuit board (within 3 time