Yamaha-DVDS-796-Service-Manual电路原理图.pdf

《Yamaha-DVDS-796-Service-Manual电路原理图.pdf》由会员分享，可在线阅读，更多相关《Yamaha-DVDS-796-Service-Manual电路原理图.pdf（82页珍藏版）》请在收音机爱好者资料库上搜索。

1、DVD-S796/S5270DVD-S796/DV-S5270 100711 SERVICE MANUAL DVD PLAYER DVD-S796/DV-S5270 SERVICE MANUALSERVICE MANUAL IMPORTANT NOTICE This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel. It has been assumed that basic service procedures inherant to the ind

2、ustry, and more specifically YAMAHA Products, are already known 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 fa

3、ilure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that all 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 doe

4、s not constitute authorization, certification or recognition 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 de

5、partments of YAMAHA are continually striving to improve 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:Stati

6、c discharges can destroy expensive components. Discharge any static electricity your body may have accumu- lated 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 parts replacement. Recheck all work

7、 before you apply power to the unit. RadioFans.CN 收音机爱 好者资料库 DVD-S796/DV-S5270 SPECIFICATIONS .1-1 LOCALE MANAGEMENT INFORMATION . 1-1 TO SERVICE PERSONNEL .1-2 PREVENTION OF ESD TO ES DEVICES. 1-3 PRECAUTION OF LASER DIODE.1-4 HANDILNG PRECAUTIONS FOR TRAVERSE DECK.1-4 REAR PANELS .1-5 OPTICAL PICK

8、UP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE .1-6 SELF-DIAGNOSIS FUNCTION AND SERVICE MODES.1-7 SERVICE PRECAUTIONS .1-9 SERVICE TOOLS AND EQUIPMENT .1-9 OPERATING INSTRUCTIONS .1-10 CONTENTS SECTION 1 SECTION 2 ASSEMBLING AND DISASSEMBLING THE CASING AND CHECKING C. B. A.s 1.Disassembly Procedure .2

9、-1 2.Casing Parts and C.B.A. Positions .2-2 3.Service Positions .2-2 4.Disassembling the Top Cover.2-3 5.Disassembling the Tray .2-3 6.Disassembling the Front Panel .2-3 7.Disassembling the Loading Base Unit . 2-4 8.Checking the Module C.B.A.2-4 9.Disassembling the Rear Panel .2-4 10.Checking the Po

10、wer Supply C.B.A.2-5 11.Checking the Mother C.B.A. .2-5 12 Checking the Power Switch C.B.A. .2-5 13.Checking the Front Switch C.B.A.2-5 ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP 1.Handling the Optical Pickup.2-6 2.Disassembly Procedure .2-6 3.Lubricating the Loading Base Unit . 2-7 4.Static El

11、ectricity Countermeasures . 2-8 5.Disassembling the Clamp Base Unit.2-9 6.Disassembling the Clamper Weight, Clamper Yoke, Magnet and Clamper .2-9 7.Disassembling the Traverse Unit.2-9 8.Disassembling the Stepping Motor Unit.2-10 9.Disassembling the Optical Pickup Unit .2-10 10.Disassembling the Nut

12、Unit.2-11 11.Disassembling the Sub-Shaft Preload Spring .2-11 12.Assembling the Optical Pickup .2-11 13.Disassembling the Spindle Motor Unit .2-12 14.Optical Pickup Tilt Adjustment .2-13 15.Disassembling the Intermediate Chassis .2-15 16.Disassembling the Vertical Cam and Drive Gear .2-15 17.Disasse

13、mbling the Pulley Gear and Deceleration Gear .2-15 18.Disassembling the Mechanism Loading C.B.A.2-15 19.Lubricating the Optical Pickup and Peripheral parts .2-16 ELECTRICAL CONFIRMATION 1.Video Output (Luminance Signal) Confirmation .2-17 2.Video Output (Chrominance Signal) Confirmation .2-17 3.Vide

14、o Component Signal (CB) Output Confirmation .2-18 SECTION 3 ABBREVIATIONS .3-1 BLOCK DIAGRAM 1.OVERALL BLOCK DIAGRAM .3-3 2.SERVO BLOCK DIAGRAM .3-4 3.VIDEO BLOCK DIAGRAM (FOR U, A, R MODELS) .3-5 4.VIDEO BLOCK DIAGRAM (FOR G, B MODEL) .3-6 5.AUDIO BLOCK DIAGRAM .3-7 INTERCONNECTION DIAGRAM 1.U, A,

15、R MODELS .3-8 2.G, B MODELS .3-9 SCHEMATIC DIAGRAM 1.POWER SUPPLY SCHEMATIC DIAGRAM (FOR U MODEL).3-10 2.POWER SUPPLY SCHEMATIC DIAGRAM (FOR G, B, A MODELS) .3-11 3.POWER SUPPLY SCHEMATIC DIAGRAM (FOR R MODEL) .3-12 4.ADSC (MODULE C.B.A. 1/6) SCHEMATIC DIAGRAM .3-13 5.AV DECODER (MODULE C.B.A. 2/6)

16、SCHEMATIC DIAGRAM (FOR U MODEL) .3-14 6.AV DECODER (MODULE C.B.A 2/6) SCHEMATIC DIAGRAM (FOR G, B, A, R MODELS).3-15 7.AUDIO (MODULE C.B.A. 3/6) SCHEMATIC DIAGRAM3-16 8.FEP (MODULE C.B.A. 4/6) SCHEMATIC DIAGRAM.3-17 9.CPU (MODULE C.B.A. 5/6) SCHEMATIC DIAGRAM.3-18 10.ODC (MODULE C.B.A. 6/6) SCHEMATI

17、C DIAGRAM.3-19 11.VIDEO OUT (MOTHER C.B.A. 1/4) SCHEMATIC DIAGRAM (FOR U, A, R MODELS) .3-20 12.VIDEO OUT (MOTHER C.B.A 1/4) SCHEMATIC DIAGRAM (FOR G, B MODELS) .3-21 13.AUDIO OUT1 (MOTHER C.B.A. 2/4) SCHEMATIC DIAGRAM3-22 14.AUDIO OUT2 (MOTHER C.B.A. 3/4) SCHEMATIC DIAGRAM.3-23 15.OPERATION (MOTHER

18、 C.B.A. 4/4) SCHEMATIC DIAGRAM.3-24 16.FRONT SW AND POWER SW SCHEMATIC DIAGRAM .3-25 17.SCART SCHEMATIC DIAGRAM (FOR G, B MODELS) .3-26 CIRCUIT BOARD DIAGRAM 1.POWER SUPPLY C.B.A. (FOR U MODEL) .3-27 2.POWER SUPPLY C.B.A. (FOR G, B, A MODELS) .3-28 3.POWER SUPPLY C.B.A. (FOR R MODEL) .3-29 4.MODULE

19、C.B.A. .3-30 5.MOTHER C.B.A.3-32 6.FRONT SW AND POWER SW C.B.A. .3-33 7.SCART C.B.A. (FOR G, B MODELS).3-34 EXPLODED VIEWS 1 SLOW/ SEARCH H /I REPEAT DVDPROG. ANGLE 96kHz 24bit STANDBY/ONf OPEN/CLOSE DVD / VIDEO CD / CD NATURAL SOUND DVD PLAYER C SEARCH D V.S.S. D I G I T A L : SKIP ; Buttons such a

20、s function in exactly the same way as the buttons on the player. 1 11 17 18 192021 22 151612 1314 87910 32456 1 1 4 3 6 5 9 23 24 25 26 27 28 31 38 37 36 35 34 33 32 30 29 = = DVD-S796/DV-S5270 ASSEMBLING AND DISASSEMBLING THE CASING AND CHECKING C.B.A.s SECTION 2 1. Disassembly Procedure When servi

21、cing the unit, use the following procedure to disassemble the casing and inside parts for internal inspection. Tray Front panel Rear panel Power Supply C.B.A. Mechanism unit Mother C.B.A. Front SW C.B.A. and Power SW C.B.A. Module C.B.A. Top cover 2 - 1 DVD-S796/DV-S5270 2. Casing Parts and C.B.A. P

22、ositions 3. Service Positions Note To inspect the loading base unit, position the left side upward (as viewed from the front). 2 - 2 Top cover Module C.B.A. Mother C.B.A. Mechanism Loading C.B.A. Front SW C.B.A. Power SW C.B.A. Power supply C.B.A. Front panel Mechanism Loading C.B.A. Module C.B.A. A

23、AX16610 AAX16590 Mother C.B.A. TX946360 Power supply C.B.A. AAX16600 DVD-S796/DV-S5270 SERVICE MANUAL 2 - 3 4. Disassembling the Top Cover 1. Remove the 4 screws. 2. Remove the 3 screws. 5. Disassembling the Tray 6. Disassembling the Front Panel 1. Turn the lever clockwise. 2. Move the tray in the d

24、irection of the arrow until it locks. 3. Release the tab locks on the left and right, then pull out the tray. 1. Release the 3 tabs on the bottom. 2. Release the 2 tabs on the left and right. 3. Release the 2 tabs. 4. Disconnect the 2 flexible cables. Tab Tab Lever Tab Flexible cable Flexible cable

25、Top CoverScrew Screw Screw DVD-S796/DV-S5270 7. Disassembling the Loading Base Unit 1. Remove the 4 screws. 2. Pull out the loading base unit vertically. Note There is a danger of damaging the connectors. 8. Checking the Module C.B.A. 1. Remove the screw. 2. Connect the module C.B.A. to the mother C

26、.B.A. extension cables for inspection. Extension cable: AAX16590 (VUC8026) Extension cable: AAX16610 (JGS0116) Mother C.B.A. Module C.B.A. PP4201-PS4201 PP3201-PS3201 3. Connect the mechanism loading C.B.A. to the mother C.B.A. with the extension cables for inspection. Extension cable: AAX16600 (VUC

27、8027) Mother C.B.A. Mechanism Loading C.B.A. PP2591-PS2591 Note Be sure to initialize the player whenever you replace a C.B.A. (Refer to section 1-9, Initializing the DVD Player.) 9. Disassembling the Rear Panel 1. Remove all of the screws connected to the rear panel. (The number of screws varies ac

28、cording to the model). 2. Release the two tabs on the left and right. Loading Base Unit Screw Screw Connector 2 - 4 Module C.B.A. Screw PS4201PS3201 PS2591Mechanism Loading C.B.A. Mother C.B.A. PP2591 PP3201 PP4201 AAX16600 AAX16590 AAX16610 PS2591 PS4201 PS3201 Screw Screw Screw DVD-S796/DV-S5270 1

29、0. Checking the Power Supply C.B.A. 1. Remove the 3 screws. 3. Checked by connecting the module C.B.A. and the mother C.B.A. with the extension cables. Extension cable: AAX16590 (VUC8026) Extension cable: AAX16610 (JGS0116) Module C.B.A. Mother C.B.A. PS3201-PP3201 PS4201-PP4201 4. Checked by connec

30、ting the mechanism loading C.B.A. and the mother C.B.A. with the extension cables. Extension cable: AAX16600 (VUC8027) Mechanism loading C.B.A. Mother C.B.A. PS2951-PP2591 2. Carefully pull out the power supply C.B.A. Note There is a danger of damaging the connectors. 3. Connect the power supply C.B

31、.A. and the mother C.B.A. with the extension cable for inspection. Extension cable: TX946360 (JGS0099) (connects the power supply C.B.A. PS1101 and the mother C.B.A. PP1101) 11. Checking the Mother C.B.A. 1. Remove the 4 screws. 2. Release the tab. 12.Checking the Power Switch C.B.A. 1. Remove the 4

32、 screws. 13.Checking the Front Switch C.B.A. 1. Remove the 9 screws. Note Be sure to intialize the player whenever you replace a C.B.A. (Refer to section 1-9, initializing the DVD player.) 2 - 5 PP2591 PP3201 PP4201 AAX16600 AAX16590 PS2591 PS4201 PS3201 AAX16610 Mother C.B.A. Power SW C.B.A. Screw

33、Screw Front SW C.B.A. DVD-S796/DV-S5270 2 - 6 ASSEMBLING AND DISASSEMBLING THE OPTICAL PICKUP (MECHANICAL PARTS) The optical pickup can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup. 1. Handling the Optical

34、Pickup The optical pickup can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup. 1. The optical pickup is an extremely high-precision mechanism. Do not subject it to strong impact. 2. To preserve the quality of

35、the optical pickup replacement parts during transport and installation, the terminals of the laser diode are short-circuited. After replacing the parts, use the proper procedure to return the laser diode to its original condition. (Refer to page 2-11, Assembling the Optical Pickup.) 3. Testers canno

36、t be used to check the laser diode of the optical pickup. The power supply inside the tester can easily damage the laser diode. 4. Take care when handling the flexible cable because excessive force can cause it to break. 5. You cannot adjust the semifixed resistor for laser power adjustment. Do not

37、turn it. 2. Disassembly Procedure Use the following procedure to replace major parts. For the assembly procedure, follow the flow chart in reverse. Mechanism unit Clamp base unit Static electricity countermeasures Pulley gear Clamper weight Clamper yoke Magnet Clamper Traverse unitMechanism Loading

38、C.B.A. Intermediate chassis Vertical cam, Drive gear Top cover Tray Front panel Deceleration gear DVD-S796/DV-S5270 2 - 7 3. Lubricating the Loading Base Unit When replacing parts, Iubricate the parts maked “XXX” in the diagram Grease EM-30LG (TX946270) 0.01g Grease EM-30LG (TX946270) 0.01g Grease E

39、M-30LG (TX946270) 0.01g Grease EM-30LG (TX946270) 0.01g Grease EM-30LG (TX946270) 0.01g Grease EM-30LG (TX946270) 0.02g Grease EM-30LG (TX946270) 0.02g Grease EM-30LG (TX946270) 0.01g Intermediate chassis Traverse unit Vertical cam drive gear Drive gear Deceleration gear Belt Tray Pulley gear Mechan

40、ism Loading C.B.A. DVD-S796/DV-S5270 2 - 8 4.Static Electricity Countermeasures The laser diode inside the traverse unit (optical pickup) can be damaged by static electricity from your body. Be sure to take static electricity countermeasures when working around the optical pickup. 1. Ground yourself

41、 Use an anti-static wrist strap to discharge static electricity from your body. 2. Ground the workbench Lay a conductive material (sheet) or steel sheet on the surface where the traverse unit (optical pickup) is to be placed, then ground the sheet. 4-1. Static Electricity Countermeasure Methods Sold

42、er the land in the flexible cable of the optical pickup. Notes Be sure to do this before disconnecting the flexible cable of the optical pickup from the module C.B.A. Use an anti-static soldering iron to short-circuit and unshort-circuit laser diode. (Recommended soldering iron: Hakko with ESD count

43、ermeasure) After you have finished repairing the laser diode, follow the correct procedure to remove the solder from the short-circuit location. (Refer to page 2-7, Assembling and Disassembling the Optical Pickup (Mechanical Parts).) 4-2. Short-circuit the laser diode Anti-static wrist strip 1M Conductive material (sheet) or steel sheet Use a clip or other item to grou