Yamaha-DVDS-795-Service-Manual电路原理图.pdf

DVD-S795/S705 DVD PLAYER DVD-S795/S705 SERVICE MANUAL For U, C, B, A, G modelsFor U, C, B, A, G modelsFor U, C, B, A, G modelsFor U, C, B, A, G modelsFor U, C, B, A, G models Printed in Japan 100666 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 industry, 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, destuction of expensive components and failure of the product to perform as specified. For these reasons, we advise all YAMAHA product owners that any service required should be performed by an authorized YAMAHA Retailer or the appointed service representaive. IMPORTANT: The presentation or sale of this manual to any individual or firm dose 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 reseach, engineering, and service departments 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:Static discharges can destroy expensive components. Dischage any static electricity your body may have accu- mulated 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 before you apply power to the unit. RadioFans.CN 收音机爱 好者资料库 DVD-S795/S705 SECTION 1 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 PICKUP SELF-DIAGNOSIS AND REPLACEMENT PROCEDURE .1-6 SELF-DIAGNOSIS FUNCTION AND SERVICE MODE . 1-7 SERVICE PRECAUTIONS . 1-9 SERVICE TOOLS AND EQUIPMENT . 1-9 OPERATING INSTRUCTIONS . 1-10 SECTION 2 ASSEMBLING AND DISASSEMBLING THE CASING AND CHECKING C. B. A.s 1. Disassembly Procedure . 2-1 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 . 2-3 8. Checking the Module C.B.A. . 2-4 9. Disassembling the Rear Panel. 2-4 10. Checking the Power 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 14. Checking the Headphone 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 Electricity Countermeasures . 2-8 5. Disassembling the Clamp Base Unit. 2-9 6. Disassembling the Clamp 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 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. Disassembling 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 ADJUSTMENT 1. Video Output (Luminance Signal) Adjustment . 2-17 2. Video Output (Chrominance Signal) Adjustment . 2-17 3. Video Component Signal (CB) Output Adjustment . 2-18 SECTION 3 ABBREVIATIONS . 3-1 BLOCK DIAGRAM 1. OVERRALL BLOCK DIAGRAM . 3-3 2. SERVOBLOCK DIAGRAM. 3-5 3. VIDEO BLOCK DIAGRAM . 3-7 4. AUDIO BLOCK DIAGRAM . 3-9 SCHEMATIC DIAGRAM 1.POWER SUPPLY SCHEMATIC DIAGRAM (FOR U, C MODELS) .3-11 2.POWER SUPPLY SCHEMATIC DIAGRAM (FOR B, G, A MODELS)3-13 3. ADSC (MODULE C.B.A. 1/8) SCHEMATIC DIAGRAM . 3-15 4. SERVO (MODULE C.B.A. 2/8) SCHEMATIC DIAGRAM. 3-17 5.AV DECODER (MODULE C.B.A. 3/8) SCHEMATIC DIAGRAM .3-19 6. VDAC (MODULE C.B.A. 4/8) SCHEMATIC DIAGRAM . 3-21 7. FEP (MODULE C.B.A. 5/8) SCHEMATIC DIAGRAM . 3-23 8. CPU (MODULE C.B.A. 6/8) SCHEMATIC DIAGRAM. 3-25 9. CLOCK (MODULE C.B.A. 7/8) SCHEMATIC DIAGRAM . 3-27 10. ODC (MODULE C.B.A. 8/8) SCHEMATIC DIAGRAM . 3-29 11. VIDEO (MODULE C.B.A. 1/5) SCHEMATIC DIAGRAM . 3-31 12.ADAC C (MODULE C.B.A. 2/5) SCHEMATIC DIAGRAM.3-33 13.AUDIO AC-3 (MODULE C.B.A. 3/5) SCHEMATIC DIAGRAM .3-35 14.AUDIO OUT (MODULE C.B.A. 4/5) SCHEMATIC DIAGRAM.3-37 15.OPERATION (MODULE C.B.A. 5/5) SCHEMATIC DIAGRAM.3-39 16.VIDEO COMP SCHEMATIC DIAGRAM (FOR U, C MODELS). 3-41 17. SCART SCHEMATIC DIAGRAM (FOR B, G MODELS) . 3-43 18.FRONT SW/HEAD PHONE/POWER SW SCHEMATIC DIAGRAM .3-45 CIRCUIT BOARD DIAGRAM 1. POWER SUPPLY C.B.A. (FOR U, C MODELS) . 3-47 2. POWER SUPPLY C.B.A. (FOR B, G, A MODELS) . 3-49 3. MODULE C.B.A. . 3-51 4. MOTHER C.B.A. . 3-55 5. FRONT SW/HEAD PHONE/POWER SW C.B.A. . 3-57 6. SCART C.B.A. (FOR B, G MODELS). . 3-59 7. VIDEO COMP C.B.A. (FOR U, C MODELS) . 3-61 SECTION 4 EXPLODED VIEWS for others, SELECT or PLAY must be pressed. When numbers are displayed (e.g. title No.), the numeric buttons are also effective for setting instead of the cursor buttons (, ). When numbers are entered by the nu- meric buttons, press SELECT to register the setting. Press RETURN or CLEAR to clear the On-Screen Menu Icons. Examples of On-Screen Menu Icons (See , and for detailed illustration.) (The screens may differ depending on the disc contents.) DVD ( )Video CD ( )CD ( ) For your reference: Depending on the type of DVD software and a TV with auto- matic picture zoom function enabled, the On-Screen Menu Icons may not be displayed or only partially displayed on the TV screen. In this case, change the position of the On-Screen Menu Icons in 4 On-Screen Messages of the initial settings. The color (blue, violet or green) of the On-Screen Menu Icons can be changed. A B C 11:56:371 LPCM ENG148k16b OFF ENG ON 1 1 3:37L ROFF PBC PRG 1 3:37 0N dB F dB PRG0 dB 100p100 40p40 50p50 N0OFF OFF POWER STOP TITLE SUBTITLE MARKER ANGLEAUDIO ON SCREENRETURN MENU SELECT H SKIP IF G DPLAYgSTILL/PAUSE OPEN/CLOSE * / I PLAY MODE REPEAT A-BCLEAR DVD SET UP SLOW/ SEARCH DPLAY CLEAR SELECT RETURN ON SCREEN OFF ABC OPERATING INSTRUCTIONS DVD-S795/S705 1 - 13 1 1:56:371 ENG 48k 16b LPCM 11 1 ENG ON Detailed descriptions of each On-Screen Menu Icon Screen for disc information (For DVD) Chapter No. Change the chapter No. by using the cursor buttons (, ) or the numeric buttons and press SELECT. Audio soundtrack language No. Audio soundtrack language LPCM $ dts Vocal Vocal Change the No. by using the cursor buttons (, ) or the numeric buttons. ENG: EnglishPOR: Portuguese FRA: FrenchRUS Russian DEU: GermanJPN: Japanese ITA:ItalianCHI: Chinese ESP: SpanishKOR: Korean NLD: DutchMAL: Malay SVE: SwedishVIE: Vietnamese NOR: NorwegianTHA: Thai DAN: DanishU :Others Linear PCM (k stands for kHz and b stands for bit.) Dolby Digital dts DVD Karaoke (Solo) DVD Karaoke (Duet) 16b 20b 24b Audio attribute 96k or 48k 15.1ch 15.1ch - (OFF) ON - (OFF) V1o V2 V1 V2 Change the No. by using the cursor buttons (, ) or the numeric buttons. ENG: EnglishPOR: Portuguese FRA: FrenchRUS Russian DEU: GermanJPN: Japanese ITA:ItalianCHI: Chinese ESP: SpanishKOR: Korean NLD: DutchMAL: Malay SVE: SwedishVIE: Vietnamese NOR: NorwegianTHA: Thai DAN: DanishU :Others Select ON or OFF by using the cursor buttons (, ). OFFSubtitle is cleared. ONSubtitle is displayed. Subtitle language No. Subtitle language Subtitle on/off For your reference: around the icon means that the item can be changed using the cursor buttons (, ). 1 Title No.Change the title No. by using the cursor buttons (, ) or the numeric buttons and press SELECT. Angle No. Change the No. by using the cursor buttons (, ) or the numeric buttons. Elapsed playing time (hour: minute:second) Change the time by using the numeric buttons and press SELECT. It can be used to find a specific scene quickly. Example: To specify 1 hour 56 min. 37 sec., enter 15637. (This function does not work with some discs.) OPERATING INSTRUCTIONS DVD-S795/S705 1 - 14 1 3:37L R OFF PBC Playback control (Video CD only) (See page 15.) OFFMenu play is not ON. ONMenu play is ON. Detailed descriptions of each On-Screen Menu Icon Screen for disc information (For Video CD/CD) Track No. Change the track No. by using the cursor buttons (, ) or the numeric buttons and press SELECT. Elapsed playing time (minute:second) During CD play, display is changed by using the cursor buttons (, ). Elapsed playing timeRemaining time of the track Remaining time of the disc Audio mode (Video CD only) Change the mode by using the cursor buttons (, ). LR L R Left channel sound is output from the speaker (L), and right channel sound from the speaker (R). Left channel sound only is output. Right channel sound only is output. Note: Track No. and the elapsed playing time are not displayed during menu play of Video CDs with playback control. It is not possible to turn playback control ON or OFF using the On-Screen Menu Icons. For your reference: around the icon means that the item can be changed using the cursor buttons (, ). 1 OPERATING INSTRUCTIONS DVD-S795/S705 1 - 15 OFF0 dB NOFFOFF Screen for player information Notes: Repeat play and marker functions do not work with an interactive DVD or during menu play of a Video CD with playback control. A-B repeat play does not work with an interactive DVD. It is not possible to change the play mode using the On-Screen Menu Icons. For your reference: The master volume can be set and stored separately for DVD, Video CD and CD. A-B repeat play Press SELECT during play to store location A and press SELECT again to store location B and to start repeat play between the specified two locations. Press SELECT again to return to normal play. Marker Press SELECT during play and press SELECT again at the preferred point to store a marker. (Marker no. is displayed instead of .) To recall a marker, select the preferred marker no. by using the cursor buttons ( , ) and enter the selection using the cursor button (). To clear a marker, select the preferred marker no. using the cursor buttons (, ) and press CLEAR. Adjust the master volume by using the cursor buttons (, ). 0 to 127 dB or Master volume Contrast (+ 7 to 7)Equalizer (+ 1/0/ 1)Brightness (0 to 15) Repeat play Select the preferred mode during play by using the cursor buttons (, ). OFF C T OFF T A Normal play Chapter repeat play Title repeat play Normal play Track repeat play Disc repeat play DVD Video CD/ CD 0000 _ _ _ DVD Cinema Dialogue Video CD/CD Play mode OFF ON PRG RND - Normal volume Louder volume Program play Random play Normal play Select the preferred mode during play by using the cursor buttons (, ). OFF Cinema Image (DVD/Video CD only) Select the preferred mode by using the cursor buttons (, ) and press SELECT. NNormal modeFFine mode SSoft modeCCinema mode User selection mode (Adjust the picture quality as you like.) When U is selected and SELECT is pressed, the On-Screen Menu Icon as shown below appears. Select the preferred item by using the cursor buttons (, ) and select the preferred value by using the cursor buttons (, ). U Color hue (+ 7 to 7) OPERATING INSTRUCTIONS DVD-S795/S705 1 - 16 100p100 For your reference: Each time the cursor button ( , ) is pressed, the speed of rapid reverse/advance and slow-motion play increases up to 5 steps. The figures appearing at both ends of the shuttle screen stand for the maximum speeds of rapid reverse and rapid advance. (DVD: + 100/ 100, Video CD: + 40/ 40, CD: + 50/ 50) Detailed descriptions of each On-Screen Menu Icon Shuttle screen Still/PausePress the cursor button (). Slow-motion play (Backward) Press the cursor button ( ). (DVD only) Slow-motion play (Forward) Press the cursor button (). (DVD/Video CD only) Rapid advancePress the cursor button ().Rapid reversePress the cursor button (). PlayPress the cursor button (). OPERATING INSTRUCTIONS DVD-S795/S705 2 - 1 SECTION2 ASSEMBLING AND DISASSEMBLING THE CASING AND CHECK