Sony hcd l 1 service manual

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2 HCD-L1 After correcting the original service problem, perform the following safety checks 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 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) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15 µF 1.5 k-„¦AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. General Power requirements North American model: 120 V AC, 60 Hz European model: 230 V AC, 50/60 Hz Other models: 110 - 240 V AC , 50/60 Hz Power consumption European model: See the nameplate 0.2 W (at the Power Saving Mode) Other models: See the nameplate Dimensions (w/h/d) Approx. 293 × 246 × 131 mm incl. projecting parts and controls Mass Approx. 3.5 kg Design and specifications are subject to change without notice. AM tuner sectionTuning range North American model: 530 - 1,710 kHz (with the tuning interval set at 10 kHz) 531 - 1,710 kHz (with the tuning interval set at 9 kHz) European model: 531 - 1,602 kHz (with the tuning interval set at 9 kHz) Other models: 530 - 1,710 kHz (with the tuning interval set at 10 kHz) 531 - 1,602 kHz (with the tuning interval set at 9 kHz) Antenna AM loop antenna, external antenna terminal Intermediate frequency 450 kHz

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3 HCD-L1 TABLE OF CONTENTS 1. SERVICING NOTES ······················································· 4 2. GENERAL ·········································································· 5 3. DISASSEMBLY 3-1. Bottom Plate,Case ························································ 9 3-2. Front Panel Section ······················································ 9 3-3. POWER Board, AM/FM Tuner ·································· 10 3-4. MAIN Board ······························································ 10 3-5. AMP Board, Regurator ·············································· 11 3-6. Door Panel, LED Board (R), Indicator ······················ 11 3-7. LED Board (L) ··························································· 12 3-8. FL (L1) Board ···························································· 12 3-9. SWITCH Board, TOUCH SWITCH Board ··············· 13 3-10. CD Board ··································································· 13 3-11. CD-mechanism (CDM71A) ······································· 14 3-12. L.MOTOR Board ······················································· 14 3-13. ENCODER Board, D.sensor Board ··························· 15 3-14. RTL Pulley Assy ························································ 15 3-15. BD Board ··································································· 16 3-16. C.MOTOR Board, L.SENSOR Board ······················· 16 3-17. Base Unit ···································································· 17 3-18. Holder Assy, Sled Motor Assy ··································· 17 3-19. RTR Pulley Assy ························································ 18 3-20. SPT Pulley Assy ························································· 18 4. TEST MODE ···································································· 19 5. ELECTRICAL ADJUSTMENTS ······························· 22 6. DIAGRAMS 6-1. Block Diagrams CD Section ····································· 23 MAIN Section ···························································· 24 6-2. Circuit Boards Location ············································· 25 6-3. Printed Wiring Board BD Section (Side A) ·············· 26 6-4. Printed Wiring Board BD Section (Side B) ·············· 27 6-5. Schematic Diagram BD Section ······························· 28 6-6. Schematic Diagram CD Section ······························· 29 6-7. Printed Wiring Board CD Section (Side A) ·············· 30 6-8. Printed Wiring Board CD Section (Side B) ·············· 31 6-9. Printed Wiring Board MOTOR Section ···················· 32 6-10. Schematic Diagram MOTOR Section ······················· 33 6-11. Printed Wiring Board MAIN Section (Side A) ········· 34 6-12. Printed Wiring Board MAIN Section (Side B) ········· 35 6-13. Schematic Diagram MAIN Section (1/2) ·················· 36 6-14. Schematic Diagram MAIN Section (2/2) ·················· 37 6-15. Printed Wiring Board AMP Section (Side A) ··········· 38 6-16. Printed Wiring Board AMP Section (Side B) ··········· 39 6-17. Schematic Diagram AMP Section ····························· 40 6-18. IC Block Diagrams ····················································· 41 6-19. Printed Wiring Board DISPLAY Section ·················· 42 6-20. Schematic Diagram DISPLAY Section ····················· 43 6-21. Printed Wiring Board SWTICH Section ··················· 44 6-22. Schematic Diagram SWTICH Section ······················ 45 6-23. Printed Wiring Board POWER Section ···················· 46 6-24. Schematic Diagram POWER Section ······················· 47 6-25. IC PIN FUNCTION DESCRIPTION ························ 48 7. EXPLODED VIEWS 7-1. Case Section ······························································· 51 7-2. Chassis Section ·························································· 52 7-3. Front Panel Section ···················································· 53 7-4. Mechanism Section(CDM71A)-1 ······························ 54 7-5. Mechanism Section(CDM71A)-2 ······························ 55 7-6. Base Unit Section (BU-31BD63A) ···························· 56 8. ELECTRICAL PARTS LIST ······································· 57