Sony zs d 50 service manual

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Ð 2 Ð Specifications ........................................................................... 1 1. SERVICE NOTE ........................................................... 3 2. GENERAL ...................................................................... 4 3. DISASSEMBLY 3-1. ÒCabinet, RearÓ, ÒCabinet Sub ASSY, FrontÓ ............ 6 3-2. Inlet Board, Power Board ........................................... 7 3-3. Battery (R) Board, Battery (L) Board ......................... 7 3-4. Cabinet (Upper) ASSY ............................................... 7 3-5. Switch (1) Board ......................................................... 8 3-6. Mechanism Deck ........................................................ 8 3-7. Line Board .................................................................. 8 3-8. Tuner Board ................................................................ 8 3-9. CD Block ASSY ......................................................... 9 3-10. Headphone Board ..................................................... 9 3-11. Switch (2) Board, LCD Board, Lamp Board .......... 10 3-12. Main Board, CD/System Board .............................. 10 3-13. CD Block Section .................................................... 11 3-14. TC RF Board, Head Relay Board, Belt (FR/BR), Motor (M691) .................................. 11 3-15. Tray ASSY, CD ....................................................... 12 3-16. Loading Board ........................................................ 12 3-17. Optical Pick-up Block, Pick-up Relay Board ......... 12 4. TEST MODE ................................................................ 13 5. ADJUSTMENTS 5-1. Mechanical Adjustmens ............................................ 14 5-2. Electrical Adjustments .............................................. 14 Power requirements For personal audio system : 120 V AC, 60 Hz 12 V DC, 8 size D (R20) batteries For memory back-up : 6 V DC, 4 size AA (R6) batteries For remote commander : 3 V DC, 2 size AA (R6) batteries Power consumption AC 25 W Battery life For personal audio systemFM recording Sony R20P : approx. 6 hSony alkaline LR20 : approx. 12 hTape playback Sony R20P : approx. 3 hSony alkaline LR20 : approx. 6 hCD playback Sony R20P : approx. 1.5 hSony alkaline LR20 : approx. 3h TABLE OF CONTENTS 6. DIAGRAMS 6-1. Explanation of IC Terminals ..................................... 18 6-2. Block Diagrams (Tape, Main Section) ..................... 20 6-3. Block Diagrams (Tuner, CD Section) ....................... 23 6-4. Printed Wiring Boards (Main Section) ..................... 27 6-5. Schematic Diagram (Main Section) ......................... 31 6-6. Printed Wiring Boards (CD/System Section) ........... 36 6-7. Schematic Diagram (CD/System Section) ............... 41 6-8. Printed Wiring Boards (Tuner Section) .................... 46 6-9. Schematic Diagram (Tuner Section) ........................ 48 7. EXPLODED VIEWS 7-1. Rear Cabinet Section ................................................ 56 7-2. Front Cabinet Section ............................................... 57 7-3. CD Block Section ..................................................... 58 7-4. Mechanism Deck Section -1 ..................................... 59 7-5. Mechanism Deck Section -2 ..................................... 60 7-6. CD Section ................................................................ 61 7-7. Optical Pick-up Section ............................................ 62 8. ELECTRICAL PARTS LIST ................................... 63 Dimensions (incl. projecting parts) Approx. 435 x 223 x 160 mm (w / h / d) (17 1/4 x 8 7/8 x 6 1/8 inches) Mass (incl. batteries) approx. 4.3 kg (9 lb. 7 oz) Supplied accessories AC power cord (1) Remote commander (1) Design and specifications are subject to change without notice.

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Ð 3 Ð NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic breakdown because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic breakdown and also use the procedure in the printed matter which is included in the repair parts. The flexible board is easily damaged and should be handled with care. NOTES ON LASER DIODE EMISSION CHECK The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick- up block. Therefore, when checking the laser diode emission, ob- serve more than 30 cm away from the objective lens. LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1. Close the lid for CD. 2. Press CD ^ button. 3. Confirm the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down once for the focus search. CAUTION DURING WHEN MOUNTING THE PULLEY FOR THE LOADING MOTOR Make the following adjustment when mounting the loading motor (part number : 1-698-999-11) and motor pulley (part number : 2- 627-174-01) of the CD section. Specification : A = 0.9 to 1.1mm SECTION 1 SERVICE NOTE SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. 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. Notes on chip component replacement ¥ Never reuse a disconnected chip component. ¥ Notice that the minus side of a tantalum capacitor may be dam- aged by heat. SAFETY CHECK-OUT (US Model) After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer : Check the antenna terminals, metal trim, ÒmetallizedÓ knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5mA (500 microampers). Leakage current can be measured by any one of three methods. 1. A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturersÕ instructions to use these instruments. 2. A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job. 3. Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The ÒlimitÓ indication is 0.75V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2V AC range are suitable. (See Fig. A) AC voltmeter (0.75V) To Exposed Metal Parts on Set Earth Ground 0.15 mF 1.5k W Fig. A. Using an AC voltmeter to check AC leakage. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFIƒS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY.