Sony hcd rxd 7 av service manual

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2 Tape player sectionRecording system 4-track 2-channel stereo Frequency response 60 - 13,000 Hz (±3 dB), (DOLBY NR OFF) using Sony TYPE I cassette Wow and flutter ±0.15% W.Peak (IEC) 0.1% W.RMS (NAB) ±0.2% W.Peak (DIN) Tuner sectionFM stereo, FM/AM superheterodyne tuner FM tuner sectionTuning range 87.5 - 108.0 MHz Antenna FM lead antenna Antenna terminals 75 W unbalanced Intermediate frequency 10.7 MHz AM tuner sectionTuning range 530 - 1,710 kHz Antenna AM loop antenna Antenna terminals External antenna terminal Intermediate frequency 450 kHz GeneralPower requirements 120 V AC, 60 Hz Power consumption 190 W Dimensions (w/h/d) Approx. 280 ´ 340 ´ 390 mm (11 1/8 ´ 13 1/2 ´ 15 3/8 in.) Mass: Approx. 9.6 kg (21 lb 2 oz.) Supplied accessories: AM loop antenna (1) Remote (1) FM lead antenna (1) Speaker cords (2) Center speaker pads (4) Design and specifications are subject to change without notice. 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. SAFETY CHECK-OUT (US model only) 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) Earth GroundAC voltmeter (0.75V) 1.5k ½ 0.15 µF Fig. A. Using an AC voltmeter to check AC leakage. To Exposed Metal Parts on Set ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFƒS 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 PIéSES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPƒMENTS PUBLIƒS PAR SONY.

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3 SECTION 1 SERVICING NOTES 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. 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 ûC 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. NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The following caution label is located inside the unit. 1. SERVICING NOTES ááááááááááááááááááááááááááááááááááááááááááááááááááá\ 3 2. GENERAL ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááá 4 3. DISASSEMBLY 3-1. CD door ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááááááá 6 3-2. CD Mechanism Deck ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááá 6 3-3. Front Panel ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 7 3-4. Main Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 7 3-5. Key Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááááá 8 3-6. Mech Deck ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááááááááá 8 3-7. Front Panel (B) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááááá 9 3-8. Front Board, H/P Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááá 9 3-9. Front AMP Board, AMP Board, Photo Socket Board, Fuse Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááááááááá 10 3-10. CD Tray ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááááá 10 3-11. CD Decord Board ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááá 11 3-12. Base Unit ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááááááááááááá 12 3-13. Cassette Lid (A)/(B) ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááá 12 4. TEST MODE ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááááááááááá 13 5. MECHANICAL ADJUSTMENTS áááááááááááááááááááááááááá 14 6. ELECTRICAL ADJUSTMENTS ááááááááááááááááááááááááááá 14 7. DIAGRAMS 7-1. Block Diagrams Tuner CD Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ ááááá 19 Main Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááá 20 7-2. Circrit Boards Location ááááááááááááááááááááááááááááááááááááááááááááááááááá\ á 21 7-3. Printed Wiring Board Main Section áááááááááááááááááááááááááááááá 22 7-4. Schematic Diagram Tuner Section áááááááááááááááááááááááááááááááá 23 7-5. Schematic Diagram Dolby Section ááááááááááááááááááááááááááááááá 24 7-6. Schematic Diagram Tape Power Section ááááááááááááááááááááááá 25 7-7. Printed Wiring Board Front Section áááááááááááááááááááááááááááááá 26 7-8. Schematic Diagram Front Section ááááááááááááááááááááááááááááááááá 27 7-9. Printed Wiring Board FLD Section ááááááááááááááááááááááááááááááá 28 7-10. Schematic Diagram FLD Section áááááááááááááááááááááááááááááááááá 29 7-11. Printed Wiring Board CD Section ááááááááááááááááááááááááááááááááá 30 7-12. Schematic Diagram CD Section áááááááááááááááááááááááááááááááááááá 31 7-13. Printed Wiring Board Center/Rear AMP Section áááááááááá 32 7-14. Schematic Diagram Center/Rear AMP Section ááááááááááááá 33 7-15. Schematic Diagram Front AMP Section ááááááááááááááááááááááá 34 7-16. Printed Wiring Board Front AMP Section áááááááááááááááááááá 35 7-17. IC Block Diagrams ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááá 36 7-23. IC PIN Function Description áááááááááááááááááááááááááááááááááááááááááááá 40 8. EXPLODED VIEWS 8-1. Cabinet Section ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááááááááááááá 42 8-2. Front Panel Section-1 ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááá 43 8-3. Front Panel Section-2 ááááááááááááááááááááááááááááááááááááááááááááááááááá\ áááá 44 8-4. CD Mechanism Deck Section-1 ááááááááááááááááááááááááááááááááááááááá 45 8-5. CD Mechanism Deck Section-2 ááááááááááááááááááááááááááááááááááááááá 46 8-6. Base Unit Section (KSM-213ECM) ááááááááááááááááááááááááááááááááá 47 9. ELECTRICAL PARTS LIST ááááááááááááááááááááááááááááááááááá 48 TABLE OF CONTENTS