Yamaha-DVDC-996-Service-Manual电路原理图.pdf

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1、DVD-C996/DV-C6280 DVD-C996 DV-C6280 100728 SERVICE MANUAL DVD PLA YER This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherent to the industry, and more specifically YAMAHA Products, are already k

2、nown and understood by the users, and have therefore not been restated. WARNING:Failure to follow appropriate service and safety procedures when servicing this product may result in personal injury, destruction of expensive components, and failure of the product to perform as specified. For these re

3、asons, we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representative. IMPORTANT:The presentation or sale of this manual to any individual or firm does not constitute authorization, certifi- cation or recogni

4、tion of any applicable technical capabilities, or establish a principle-agent relationship of any form. The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The research, engineering, and service departments of YAMAHA are continually striving to improve

5、YAMAHA products. Modifications are, therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any discrepancy appear to exist, please contact the distributors Service Division. WARNING:Static discharges can destroy expensive components. Discharge

6、 any static electricity your body may have accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this buss). IMPORTANT:Turn the unit OFF during disassembly and part replacement. Recheck all work before you apply power to the unit. IMPORTANT NOTICE DVD-C

7、996 DV-C6280 SERVICE MANUAL I CONTENTS TO SERVICE PERSONNEL .1 PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELECTRO STATICALLY SENSITIVE (ES) DEVICES.3 PRECAUTION, LASER DIODE .4 HANDLING PRECAUTIONS FOR TRAVERSE DECK .4 FRONT PANELS .5 REAR PANELS .67 SPECIFICATIONS .7 INTERNAL VIEW .8 OPTICAL P

8、ICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE .9 SELF-DIAGNOSIS FUNCTION AND SERVICE MODES .1011 SERVICE PRECAUTIONS .11 SERVICE TOOLS AND EQUIPMENT .12 DISASSEMBLY PROCEDURES .1316 ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP.1722 ADJUSTMENT.2326 SPECIAL FUNCTIONS FOR MAINTENANCE.2727 IC DATA .

9、2932 DISPLAY DATA .33 ABBREVIATIONS .3435 PRINTED CIRCUIT BOARD .3647 SCHEMATIC DIAGRAM .4864 BLOCK DIAGRAM .6569 REMOTE CONTROL TRANSMITTER.70 PARTS LIST .7188 RadioFans.CN 收音机爱 好者资料库 DVD-C996/DV-C6280 DVD-C996 DV-C6280 ITO SERVICE PERSONNEL 1. Critical Components Information Components having spec

10、ial characteristics are marked Z and must be replaced with parts having specifications equal to those originally installed. 2. Leakage Current Measurement (For 120V Models Only) When service has been completed, it is imperative to verify that all exposed conductive surfaces are properly insulated fr

11、om supply circuits. GMeter impedance should be equivalent to 1500 ohm shunted by 0.15F. GLeakage current must not exceed 0.5mA. GBe sure to test for leakage with the AC plug in both polarities. 1 AC LEAKAGE TESTER OR EQUIVALENT EQUIPMENT UNDER TEST INSULATING TABLE WALL OUTLET WARNING: Laser Safety

12、This product contains a laser beam component. This component may emit invisible, as well as visible radiation, which may cause eye damage. To protect your eyes and skin from laser radiation, the following precautions must be used during servicing of the unit. 1) When testing and/or repairing any com

13、ponent within the product, keep your eyes and skin more than 30 cm away from the laser pick-up unit at all times. Do not stare at the laser beam at any time. 2) Do not attempt readjustment, disassembly or repair of the laser pick-up, unless noted elsewhere in this manual. 3) CAUTION : Use of control

14、s, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. WARNING: CHEMICAL CONTENT NOTICE! The solder used in the production of this product contains LEAD. In addition, other electrical/electronic and/or plastic (where applicable) comp

15、onents may also contain traces of chemicals found by the California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects or other reproductive harm. DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH FOR ANY REASON WHATSOEVER! Avoid

16、 prolonged, unprotected contact between solder and your skin! When soldering, do not inhale solder fumes or expose eyes to solder/flux vapor! If you come in contact with solder or components located inside the enclosure of this product, wash your hands before handling food. Laser Emitting conditions

17、: 1) When the Top Cover is removed, and the POWER SW is turned to the ON position, the laser component will emit a beam for several seconds to detect if a disc is present. During this time (5-10 sec.) the laser may radiate through the lens of the laser pick-up unit. Do not attempt any servicing duri

18、ng this period! If no disc is detected, the laser will stop emitting the beam. When a disc is set, you will not be exposed to any laser emissions. 2) The laser power level can be adjusted with the VR on the pick-up PWB, however, this level has been set by the factory prior to shipping from the facto

19、ry. Do not adjust this laser level control unless instruction is provided elsewhere in this manual. Adjustment of this control can increase the laser emission level from the device. RadioFans.CN 收音机爱 好者资料库 DVD-C996/DV-C6280 DVD-C996 DV-C6280 2 Laser Diode Properties Wave length: 665 nm Laser power:

20、CLASS II Laser output: Max. 1.0mW (Continuous) Output value determined by 21 CFR CHAPTER1, SUBCHAPTER J VARO!: AVATTAESSA JA SUOJALUKITUS OHITETTAESSA OLET ALTTIINA NKYMTTMLLE LASER-STEILYLLE. L KATSO STEESEEN. VARNING! : OSYNLIG LASERSTRLNING NR DENNA DEL R PPNAD OCH SPRREN R URKOPPLAD. BETRAKTA EJ

21、 STRLEN. A, B, G, R models Optical pick-up DVD-C996/DV-C6280 DVD-C996 DV-C6280 3 I PREVENTION OF ELECTRO STATIC DISCHARGE (ESD) TO ELECTRO STATICALLY SENSITIVE (ES) DEVICES LOCALE MANAGEMENT INFORMATION Locale Management Information : This DVD player is designed and manufactured to respond to the Lo

22、cale Management Information that is recorded on a DVD disc. If the Locale number described on the DVD disc does not correspond to the Locale number of this DVD player, this DVD player cannot play this disc. This product incorporates copyright protection technology that is protected by method claims

23、of certain U.S. patents and other intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision Corporation, and is intended for home and other limited viewing uses only unless otherwise authorized

24、 by Macrovision Corporation. Reverse engineering or disassembly is prohibited. q w r w t t r w y e t Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are

25、integrated circuits 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 electro static discharge (ESD). 1. Immediately before handling any semiconductor component or semiconductor-eq

26、uipped assembly, drain off any ESD on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging ESD wrist strap, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical a

27、ssembly equipped with ES devices, place the assembly on a conductive surface 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 ES devices. 4. Use only an anti-static solder removal device. Some

28、solder removal devices not classified as “anti-static (ESD protected)” can generate electrical charge sufficient to damage ES devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices. 6. Do not remove a replacement ES device from its pro

29、tective package until immediately before you are ready to install it. (Most replacement ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive material). 7. Immediately before removing the protective material from the leads of a re

30、placement ES divice, touch the protective material to the chassis or circuit assembly into which the device will be installed. CAUTION: Be sure no power is applied to the chassis or circuit, and observe all other safety precautions. 8. Minimize bodily motions when handling unpackaged replacement ES

31、devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to damage an ES device). There are special components used in this equipment which are important for safety. The

32、se parts are marked Z by in the schematic diagrams, exploded views and replacement parts list. It is essential that these critical parts should be replaced with manufacturers specified parts to prevent shock, fire, or other hazards. Do not modify the original design without permission of manufacture

33、r. IMPORTANT SAFETY NOTICE DVD-C996/DV-C6280 DVD-C996 DV-C6280 4 I PRECAUTION, LASER DIODE I HANDLING PRECAUTIONS FOR TRAVERSE DECK CAUTION: This unit utilizes a class II laser. Visible laser radiation is emitted from the optical pickup lens when the unit is turned on: 1.Do not look directly into th

34、e pickup lens. 2.Do not use optical instruments to look at the pickup lens. 3.Do not adjust the preset variable resistor on the optical pickup. 4.Do not disassemble the optical pickup unit. 5.If the optical pickup is replaced, use the manufactures specified replacement pickup only. 6.Use of control

35、or adjustment or performance of procedures other than those specified herein may result in hazardous radiation exposure. The laser diode in the optical pickup may break down due to potential difference caused by static electricity of clothes or human body. So be careful of electrostatic breakdown du

36、ring repair of the optical pickup. Handling of optical pickup 1.Do not subject the optical pickup to static electricity as it is extremely sensitive to electrical shock. 2.To prevent the breakdown of the laser diode, an antistatic shorting bridge is soldered into the flexible board (FPC Board). When

37、 removing or connecting the shorting bridge, finish the job in as short times as possible. 3.Be careful not to apply excessive stress to the flexible board (FPC Board). 4.Do not turn the variable resistor (Laser power adjustment). It has already been adjusted. Grounding for electrostatic breakdown p

38、revention 1.Human body grounding. Use the antistatic wrist strap to discharge the static electricity from your body. 2.Work table grounding. Put a conductive material (sheet) or steel sheet on the area where the optical pickup is placed and ground the sheet. Caution: The static electricity of your c

39、lothes will not be grounded through the wrist strap. So take care not to let your clothes touch the optical pickup. 1M Solder (Magnified view) Use a clip or other item to ground the unit. Flexible Cable Pickup unit Conductive material (sheet) or steel sheet Anti-static wrist strip DVD-C996/DV-C6280

40、DVD-C996 DV-C6280 I FRONT PANELS M DVD-C996 M DV-C6280 5 DVD-C996/DV-C6280 DVD-C996 DV-C6280 I REAR PANELS M DVD-C996 U, C models M DV-C6280 U model M DVD-C996 R model 240V 120V 110V 220V M DVD-C996 A model 6 DVD-C996/DV-C6280 DVD-C996 DV-C6280 U . USA model C .Canadian model A . Australian model B

41、. British model G . European model R . General model Manufactured under license from Dolby Laboratories Licens- ing Corporation. Dolby and the double-D symbol V are trademarks of Dolby Laboratories Licensing Corporation. I SPECIFICATIONS 7 I AUDIO SECTION Frequency Response DVD (48kHz Sampling)2 Hz

42、to 22 kHz DVD (96kHz Sampling)2 Hz to 44 kHz CD, Video CD2 Hz to 20 kHz Harmonic Distortion+Noise (1kHz)0.002% S/N Ratio115 dB (Weighted) Dynamic Range DVD (48kHz, 24 bit)103 dB CD, Video CD99 dB Output Voltage (1 kHz, 0 dB)2.0 V I VIDEO SECTION VIDEO output1 Vp-p (75 ohms) S VIDEO output Y output1

43、Vp-p (75 ohms) C output U, C, R models0.286 Vp-p (75 ohms) A, B, G models0.3 Vp-p (75 ohms) COMPONENT VIDEO output (U, C, R, A only) Y output1 Vp-p (75 ohms) Pb output0.7 Vp-p (75 ohms) Pr output0.7 Vp-p (75 ohms) I GENERAL Power Requirements U, C models120V, 60Hz A model240V, 50Hz B, G models230V,

44、50Hz R model110/120/220/240V, 50/60Hz Power Consumption18W Dimensions (W x H x D)435 x 116 x 404 mm (17-1/8” x 4-9/16” x 15-7/8”) Weight6.1 kg (13 lbs 7 oz) Finish DVD-C996 (U, C, A, B, G)Black color DVD-C996 (U, C, R, A)Gold color DV-C6280 (U)Black color AccessoriesAudio/video connection cord Remot

45、e control transmitter Battery: x2 (Size “AA”, R06) * Specifications subject to change without notice. M DVD-C996 B, G models DVD-C996/DV-C6280 DVD-C996 DV-C6280 8 I INTERNAL VIEW erw ty q 435 (17-1/8) 16 (5/8) 100 (3-15/16) 116 (4-9/16) 3 (1/8) 6(1/4)395 (15-9/16) 404 (15-7/8) G DIMENSION Unit : mm

46、(inch) q MAIN (3) P.C.B. w CM-220 UNIT e CLAMPER ASSY r DVD MODULE P.C.B. t TRAY ASSY y MAIN (1) P.C.B. DVD-C996/DV-C6280 DVD-C996 DV-C6280 9 I OPTICAL PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE The optical pickup self-diagnosis function and tilt adjustment check function have been newly added to this player. When repair- ing, use the following procedure for effective Self-diagnosis and tilt adjus