Sony zs 2000

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-“ 2 -“ 1. SERVICING NOTES 1-1. Laser Diode and Focus Search Operation Check ................ 4 1-2. Caution During when Mounting the Pulley for the Loading Motor .................................................................... 4 2. GENERAL Playing a CD ....................................................................... 5 Listening to the radio ........................................................... 5 Setting the clock .................................................................. 6 Setting the time signal ......................................................... 6 Saving Power ....................................................................... 6 3. DISASSEMBLY 3-1. Net Sub Assy, Saran, Speaker (Front) Sub Assy ............. 7 3-2. Cabinet, Front ...................................................................... 8 3-3. Top Cabinet Assy ................................................................ 9 3-4. CD Block Assy .................................................................... 9 3-5. Power Board, REG Board ................................................. 10 3-6. TU Board ........................................................................... 10 3-7. Cover, Heat Sink, Line Board ........................................ 11 3-8. Volume Board .................................................................... 11 3-9. H/P Board, Switch (1) Board, Switch (2) Board ............... 12 3-10. FL Board ........................................................................... 12 3-11. Control Board, Lamp Board .............................................. 13 3-12. Main Board ....................................................................... 13 3-13. CD Board .......................................................................... 14 3-14. CD Block Section .............................................................. 14 3-15. Tray Assy, CD ................................................................... 15 3-16. Loading Board ................................................................... 15 3-17. Optical Pick-up Block, Pick-up Relay Board ................... 16 4. TEST MODE 4-1. General Description .......................................................... 17 4-2. Test Mode .......................................................................... 17 TABLE OF CONTENTS 5. ELECTRICAL ADJUSTMENTS 5-1. Tuner Section .................................................................... 18 5-2. CD Section ........................................................................ 19 6. DIAGRAMS 6-1. IC Pin Description ............................................................. 20 6-2. Circuit Boards Location .................................................... 22 6-3. Block Diagram -“Tuner Section-“ ....................................... 23 6-4. Block Diagram -“CD Section-“ ........................................... 25 6-5. Block Diagram -“Audio Section-“ ...................................... 27 6-6. Printed Wiring Board -“Tuner Section-“ ............................. 29 6-7. Schematic Diagram -“Tuner Section-“ ................................ 31 6-8. Printed Wiring Board -“CD Section-“ ................................. 33 6-9. Schematic Diagrams -“CD Section-“ .................................. 35 6-10. Printed Wiring Boards -“Pick-up Section-“ ........................ 37 6-11. Schematic Diagrams -“Pick-up Section-“ ........................... 39 6-12. Printed Wiring Boards -“Main Section-“ ............................ 41 6-13. Schematic Diagrams -“Main Section-“ ............................... 43 6-14. Printed Wiring Boards -“Control Section-“ ......................... 45 6-15. Schematic Diagrams -“Control Section-“ ........................... 47 6-16. Printed Wiring Boards -“Display Section-“ ........................ 49 6-17. Schematic Diagrams -“Display Section-“ ........................... 51 6-18. Printed Wiring Boards -“Power Supply Section-“ .............. 53 6-19. Schematic Diagrams -“Power Supply Section-“ ................. 55 7. EXPLODED VIEWS 7-1. Front Cabinet Section ........................................................ 60 7-2. Rear Cabinet Section ......................................................... 61 7-3. CD Block Section .............................................................. 62 7-4. CD Loading Section (VLM-ZS2000) ............................... 63 7-5. Optical Pick-up Section (CDM-2411AA) ......................... 64 8. ELECTRICAL PARTS LIST ...................................... 65

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-“ 3 -“ SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body. During repair, pay attention to electrostatic break-down 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 emis- sion, observe from more than 30 cm away from the objective lens. 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. FLEXIBLE CIRCUIT BOARD REPAIRING - Keep the temperature of the soldering iron around 270 ËšC dur- ing 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. CAUTION Use of controls or adjustments or performance of proce- dures other than those specified herein may result in haz- ardous radiation exposure. To Exposed Metal Parts on Set 0.15µF 1.5k -„¦ AC voltmeter (0.75V) Ear th Ground Fig. A. Using an AC voltmeter to check AC leakage. SAFETY CHECK-OUT After correcting the original service problem, perform the following safety check before releasing the set to the customer: Check the antenna terminals, metal trim, metallized 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 0.5 mA (500 microamperes). 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 manufacturers 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 limit indication is 0.75 V, 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)