Sony hcd xb 20 service manual
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Ñ 2 Ñ Tuner section FM stereo, FM/AM superheterodyne tuner FM tuner sectionTuning range 87.5 Ð 108.0 MHz Antenna FM lead antenna Antenna terminals 75 W unbalanced Intermediate frequency 10.7 MHz AM tuner sectionTuning range (2 band model) North American model: 530 Ð 1,710 kHz (with the tuning interval set at 10 kHz) Other models: 531 Ð 1,602 kHz (with the tuning interval set at 9 kHz) 530 Ð 1,710 kHz (with the tuning interval set at 10 kHz) (3 band model) MW: 531 Ð 1,602 kHz (with the tuning interval set at 9 kHz) LW: 153 Ð 279 kHz (with the tuning interval set at 3 kHz) Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz General Power requirements North American model: 120 V AC, 60 Hz Mexican model: 120 V AC, 50/60 Hz European model: 230 V AC, 50/60 Hz Australian, South African and Thailand models: 220 Ð 240 V AC, 50/60 Hz Other models: 110 Ð 120 V AC or 220 Ð 240 V AC, 50/60 Hz (adjustable with voltage selector) Power consumption 130 W Dimensions (w/h/d) incl. projecting parts and controls Approx.355 ´ 423 ´ 440 mm (14 ´ 16 3/4 ´ 17 3/8 in) Mass Approx. 14.0 kg (30 lb 14 oz.) Supplied accessories AM loop antenna (1) Remote RM-SG5 (1) FM lead antenna (1) Design and specifications are subject to change without notice. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 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 270ûC 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. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. This caution label is located inside the unit. SERVICING NOTE NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT The laser diode in the optical pick-up block may suffer electrostatic 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 emission, observe from more than 30 cm away from the objective lens. 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.
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Ñ 3 Ñ SAFETY CHECK-OUT After correcting the original service problem, perform the following safety checks 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 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 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 0.75 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) To Exposed Metal Parts on Set 0.15 µF 1.5 k ½ AC Voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. TABLE OF CONTENTS 1. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 4 ÑFRONT PANELÑ ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááá 4 ÑBACK PANELÑ ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááá 5 2. DISASSEMBLY 2-1. Top Cover ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááááá 6 2-2. Front Panel Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 6 2-3. Main Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 7 2-4. Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááá 7 2-5. CD Mechanism Deck Section áááááááááááááááááááááááááááááááááááááááááááá 8 2-6. Tape Mechanism Deck ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááá 8 2-7. Cassette Door ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááá 9 2-8. CD Door Assy ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááá 9 2-9. Base Unit ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááá 10 2-10. Disc Table ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 10 3. MECHANICAL ADJUSTMENTS ááááááááááááááááááááááááááááá 11 4. ELECTRICAL ADJUSTMENTS ááááááááááááááááááááááááááááááá 11 5. DIAGRAMS 5-1. Circuit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ 16 5-2. Block Diagram ÑDeck SectionÑ ááááááááááááááááááááááááááááááááááá 17 5-3. Block Diagram ÑTuner/CD SectionÑ ááááááááááááááááááááááááááá 19 5-4. Schematic Diagram ÑMain Section (1/2)Ñ ááááááááááááááááááá 21 5-5. Schematic Diagram ÑMain Section (2/2)Ñ (US, AUS, MX model) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 25 5-6. Printed Wiring Board ÑMain SectionÑ (US, AUS, MX model) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áá 29 5-7. Printed Wiring Board ÑMain SectionÑ (AEP, UK, E, SP, MY, AR model) áááááááááááááááááááááááááááááááááááá 34 5-8. Schematic Diagram ÑMain Section (2/2)Ñ (AEP, UK, E, SP, MY, AR model) áááááááááááááááááááááááááááááááááááá 39 5-9. Schematic Diagram ÑDisplay SectionÑ áááááááááááááááááááááááá 43 5-10. Printed Wiring Board ÑDisplay SectionÑ ááááááááááááááááááááá 47 5-11. Printed Wiring Board ÑCD SectionÑ áááááááááááááááááááááááááááá 52 5-12. Schematic Diagram ÑCD SectionÑ ááááááááááááááááááááááááááááááá 57 5-13. Schematic Diagram ÑPower SectionÑ áááááááááááááááááááááááááá 60 5-14. Printed Wiring Board ÑPower SectionÑ ááááááááááááááááááááááá 63 5-15. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 68 5-16. IC Pin Function Description ááááááááááááááááááááááááááááááááááááááááááááá 71 6. EXPLODED VIEWS 6-1. Top Cover Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááá 73 6-2. CD Door Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááá 74 6-3. Panel Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááá 75 6-4. Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááá 76 6-5. Cassette Button Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ á 77 6-6. Cassette Mechanism Deck Section ááááááááááááááááááááááááááááááááááá 78 6-7. CD Mechanism Deck Section áááááááááááááááááááááááááááááááááááááááááá 79 6-8. Base Unit Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 80 7. ELECTRICAL PARTS LIST áááááááááááááááááááááááááááááááááááááá 81