Sony-RCDW7V-cd-sm 电路图 维修手册.pdf

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1、RCD-W7V US Model COMPACT DISC RECORDER SERVICE MANUAL SPECIFICATIONS Model Name Using Similar Machanism RCD-W1 CD Mechanism TypeCDM-700(CD-RW) Optical Pick-up TypeKRS-220C Model Name Using Similar Mechanism NEW CD/DVD Mechanism TypeDP-4RM CD-R CD/DVD 9-873-470-03 2002I0200-1 2002.09 Sony Corporation

2、 Home Audio Company Published by Sony Engineering Corporation DECK A (the CD/DVD player section) SystemCD/DVD player LaserSemiconductor laser Signal format systemNTSC Playable discsDVD, CD, CD-R/CD-RW (for music use), MP3 disc Frequency responseDVD (PCM 96 kHz): 20 Hz to 44 kHz (1.0 dB) DVD (PCM 48

3、kHz): 20 Hz to 22 kHz (0.5 dB) CD: 20 Hz to 20 kHz (0.5 dB) Signal-to-noise ratioMore than 100dB (ANALOG OUT connectors only) Harmonic distortionLess than 0.015% Dynamic rangeMore than 95 dB (DVD) More than 95 dB (CD) Wow and flutterLess than detected value (0.001% W PEAK) Outputs VIDEO OUT1.0 Vp-p

4、75 ohms, sync negative S-VIDEO OUTLuminance signal: 1.0 Vp-p, 75 ohms C: 0.3 Vp-p, 75 ohms COMPONENT VIDEO OUTY: 1.0 Vp-p, 75 ohms, sync negative (Phono jacks)CB/B-Y, CR/R-Y: 0.7 Vp-p, 75 ohms DECK B (the CD-R and CD-RW recording section) SystemCompact disc digital audio system LaserSemiconductor la

5、ser Playable discsCD, CD-R, CD-RW (for music use) Frequency response20 Hz to 20,000 Hz (0.5 dB) Signal-to-noise ratioOver 100 dB during playback Dynamic rangeMore than 95 dB during playback Input ANALOG IN (Phono jacks)Impedance 47 kilohms, Rated input 330 mVrms DIGITAL OPTICAL INOptical wavelength

6、660 nm (Square optical connector jack) Outputs ANALOG OUT (Phono jacks) Impedance 47 kilohms, Rated input 2 Vrms Load impedance over 10 kilohms DIGITAL OPTICAL OUTWavelength 660 nm (Square optical connector jack)Output level -18 dBm PHONES (Phone jacks)28 mW, 32 ohms General Power requirements120 V

7、AC, 60 Hz Power consumption25W (120 V AC) Dimensions (approx.)430 x 107.5 x 370 mm (w/h/d) incl. projecting parts Mass (approx.)5.1 kg Supplied accessories Design and specifications are subject to change without notice. Video cord (1) Audio cords (2) Remote commander (remote) RM-R70 (1) R6 (size AA)

8、 batteries (2) Ver 1.2 2002.09 RadioFans.CN 收音机爱 好者资料库 2 RCD-W7V SAFETY CHECK-OUT After correcting the original service problem, perform the follow- ing safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed

9、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). Leak- age current can be measured by any o

10、ne 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

11、 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 pas- sive VOM that is suitable. Nearly all battery operated digital multimeters that have a

12、 2V AC range are suitable. (See Fig. A) 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 MA

13、NUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. 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 270C during repairing. Do

14、 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 The laser diode in the optical pick-up block may suffer electrostatic brea

15、k-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 d

16、amaged 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 from more than

17、 30 cm away from the objective lens. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. Fig. A. Using an AC voltmeter to check AC leakage. 0.15F To Exposed Metal Parts on Set 1.5k AC voltmeter (0.75V) Ea

18、rth Ground CAUTION The use of optical instruments withthis product will increase eye hazard. As the laser beam used inthis Compact Disc Recorder is harmful to eyes, do not attempt to disassemble the cabinet. Refer servicing to qualified personnel only. This label is located on the rear panel of your

19、 recorder. CAUTION VISIBLE LASER RADIATION WHEN OPEN AND INTERLOCK DEFEATED. DO NOT STARE INTO BEAM. RadioFans.CN 收音机爱 好者资料库 3 RCD-W7V TABLE OF CONTENTS 1. SERVICING NOTE. 4 2. GENERAL. 8 3. DISASSEMBLY 3-1. Top Case. 9 3-2. Tray Door, Front Panel Assy. 10 3-3. HP board, FL board, VOL board. 10 3-4.

20、 Back Panel . 11 3-5. Audio Board . 11 3-6. Power Board .12 3-7. DVD Deck Assy (Deck A), CD-R Deck Assy (Deck B) . 12 3-8. BD Board (Deck A) .13 3-9. Sled Base Assy (Deck A) . 13 3-10.CD-R Board (Deck B). 14 3-11.PU Mechanism Assy (Deck B). 14 4. TEST MODE.15 5. ELECTRICAL ADJUSTMENT . 16 6. DIAGRAM

21、S 6-1. Circuit Boards Location. 23 6-2. Block diagrams Overall Section . 24 Block diagrams CD/DVD Section .25 Block diagrams CD-RW Section . 26 Block diagrams I/O Section . 27 Block diagrams Power Section .28 6-3. Schematic Diagram BD Section (1/5) .29 6-4. Schematic Diagram BD Section (2/5) .30 6-5

22、. Schematic Diagram BD Section (3/5) .31 6-6. Schematic Diagram BD Section (4/5) .32 6-7. Schematic Diagram BD Section (5/5) .33 6-8. Printed Wiring Board BD Section (Side A) . 34 Printed Wiring Board BD Section (Side B) . 35 6-9. Schematic Diagram BD-R Section (1/4) . 36 6-10. Schematic Diagram BD-

23、R Section (2/4) . 37 6-11. Schematic Diagram BD-R Section (3/4) . 38 6-12. Schematic Diagram BD-R Section (4/4) . 39 6-13. Printed Wiring Board BD-R Section (Side A) .40 Printed Wiring Board BD-R Section (Side B) .41 6-14. Printed Wiring Board Audio Section . 42 6-15. Schematic Diagram Audio Section

24、 . 43 6-16. Printed Wiring Board Display Section .44 6-17. Schematic Diagram Display Section . 45 6-18. Schematic Diagram Power Section .46 6-19. Printed Wiring Board Power Section . 47 6-20. IC Pin Functions.48 6-21. IC Block Diagrams.54 7. EXPLODED VIEWS 7-1. Front Panel Section . 56 7-2. Chassis

25、Section . 57 7-3. DVD Play Section (Deck A) (DP-4RM).58 7-4. CD Record Section (Deck B) (CDM-700(CD-RW). 59 8. ELECTRICAL PARTS LIST.60 ERROR MESSAGE The following table explains the error messages that appear in the display. CHECK DISC , A record-related button has been pressed when a finalized dis

26、c is in the DECK B. , A record-related button has been pressed when a standard CD is in the DECK B. , An unplayable disc (CD-ROM, Video CD etc.) is inserted. DATA DISC , A non-audio CD-ROM or a CD-Video disc has been placed in the machine. DISC ERROR , An unfinalized disc has been placed in the DECK

27、 A. , A DVD disc has been placed in the DECK B . , The disc is not seated properly. , There is a problem with the disc. DISC FULL , There is not enough time left on the disc to complete a planned recording. ERROR , The disc tray is not seated properly. NO AUDIO , A record-related button has been pre

28、ssed when a non-audio disc is in the DECK B. CAN NOT COPY , A recording is not possible due to the Serial Copy Management System (SCMS). UNLOCK , There is not source for recording through DIGITAL OPTICAL IN jack. NO DISC , No disc is inserted in the recorder. RadioFans.CN 收音机爱 好者资料库 4 RCD-W7V SECTIO

29、N 1 SERVICING NOTE NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. 2. Repair notes 1) The pick-up incorporate

30、s a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully , taking care to avoid external pressure and impact. If it is subjected to pressure or impact, the result may be an operational malfunction and/or damage to

31、the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter t

32、he eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring

33、. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort this. 6) Never attempt to disassemble the pick-up. Spring by excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, becau

34、se they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. Storage in conductive bag NEVER look directly at the laser beam, and dont let contact fingers or other exposed skin. Magnet How to hold the pick-up Conduc

35、tive Sheet Cotton swab Pressure Pressure Drop impact 5 RCD-W7V NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These compo- nents are sensitive to, and easily affected by, static electricity. If su

36、ch static is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature of humidity is

37、high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a

38、 conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers shou

39、ld be grounded by an armband (1M) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare s

40、kin. Resistor (1M) Conductive Sheet Resistor (1M) Armband 6 RCD-W7V Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components com- monly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD

41、 devices are integrated cir- cuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-e

42、quipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After rem

43、oving an electrical assembly equipped with ESD devices, place the assembly on a conductive sur- face such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as anti-static can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can genera