JVC-THS8-ddcs-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2004 Victor Company of Japan, Limited No.MB236 2004/6 DVD DIGITAL CINEMA SYSTEM MB23620046 TH-S9,TH-S8,TH-S7 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-30 Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe TH-S9 Area suffix B - U.K. E - Continental Europe EN - Northern Europe TH-S8 Area suffix E - Continental Europe EN - Northern Europe EV - Eastern Europe TH-S7 TH-S9 SD card TH-S8TH-S7 XV-THS7 SP-PWS7 SP-THS7FSP-TH7S SP-THS9C XV-THS9 SP-PWS9 SP-THS9FSP-THS9S SP-THS9C XV-THS8 SP-PWS8 SP-THS9FSP-THS9S SP-THS9C RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB236) SPECIFICATION Center unit (XV-THS9/XV-THS7) *1: This value is measured at System cord CONNECTOR for reference. *2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Center unit (XV-THS8) *1: This value is measured at System cord CONNECTOR for reference. *2: Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Audio sectionTotal Harmonic Distortion*10.02% Digital input*2DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm) Video sectionVideo SystemPAL Horizontal Resolution500 lines Signal-to-Noise Ratio (Composite signal when RGB is selected) 64 dB Video output level Composite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.3 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 RGB0.7 V(p-p)/75 Tuner sectionTuning RangeFM87.50 MHz to 108.00 MHz AM (MW)522 kHz to 1 629 kHz GeneralPower RequirementsAC 230 V , 50 Hz Power Consumption18 W (at operation) 2.0 W (in standby mode) Dimensions (W H D)435 mm 58 mm 319 mm Mass3.5 kg Audio sectionTotal Harmonic Distortion*10.02% Digital input*2DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm E30 nm) Video sectionVideo SystemPAL Horizontal Resolution500 lines Signal-to-Noise Ratio (Composite signal when RGB is selected) 64 dB Video output levelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.3 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 RGB0.7 V(p-p)/75 Tuner sectionTuning RangeFM87.50 MHz to 108.00 MHz AM (MW)522 kHz to 1 629 kHz GeneralPower RequirementsAC 230 V , 50 Hz Power Consumption18 W (at operation) 2.0 W (in standby mode) Dimensions (W H D)435 mm 57 mm 319 mm Mass3.0 kg RadioFans.CN 收音机爱 好者资料库 (No.MB236)1-3 Subwoofer (SP-PWS9/SP-PWS7) Subwoofer (SP-PWS8) Satellite Speakers Designs furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must never be replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts in the product have special safety related characteristics. These characteristics are often not evident from visual inspection. Parts other than specified by the manufacturer may not have the same safety characteristics as the recommended replacement parts shown in the Parts List of the Service Manual and may create shock, fire, or other hazards. (4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling. 1.5.1Warning (1) Service should be performed by qualified personnel only. (2) This equipment has been designed and manufactured to meet international safety standards. (3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (4) Repairs must be made in accordance with the relevant safety standards. (5) It is essential that safety critical components are replaced by approved parts. (6) If mains voltage selector is provided, check setting for local voltage. Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. 1-6 (No.MB236) 1.6Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.6.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode. 1.7Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.8Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land sections before the flexible wire is disconnected from the connecto on the servo board. (If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land sections after connecting the flexible wire. 1M Conductive material (conductive sheet) or iron palate (caption) Anti-static wrist strap Traverse mechanism assembly Pickup Short land section Card wire Connector (No.MB236)1-7 1.9Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CLASS 1 LASER PRODUCT CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) WARNING LABEL 1-8 (No.MB236) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB236)1-9 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover assembly (See Figs.1 to 3) For XV-THS9 and XV-THS7 models (1) From the back side of the main body, remove the five screws A attaching the top cover assembly. (See Fig.1) (2) From the both sides of the main body, release the engage- ment sections a to remove the side panels (L)/(R) from the main body in the direction of the arrow. (See Figs.2 and 3.) (3) Remove the four screws B attaching the top cover assem- bly. (See Figs.2 and 3.) (4) Lift the rear section of the top cover assembly upward and remove the top cover assembly from the main body. (See Figs.2 and 3.) 3.1.2Removing the metal cover (See Figs.1 to 3) For XV-THS8 model (1) From the back side of the main body, remove the three screws A attaching the metal cover. (See Fig.1) (2) From the both sides of the main body, remove the four screws B attaching the metal cover. (See Figs.2 and 3) (3) Lift the rear section of the metal cover upward while ex- tending the lower sections of the metal cover. (See Figs.2 and 33.) Fig.1 Fig.2 Fig.3 A Top cover assembly B Metal cover XV-THS8 XV-THS9, XV-THS7 BTop cover assembly Side panel (R) a B Metal cover XV-THS8 XV-THS9, XV-THS7 B a Top cover assembly Side panel (L) 1-10 (No.MB236) 3.1.3Removing the front panel assembly (See Figs.4 and 5) Prior to performing the following procedures, remove the top cover assembly or metal cover. (1) From the top side of the main body, disconnect the card wires from the connectors (CN451, CN452) on the main board. (See Fig.4) (2) Disconnect the card wire from the connector CN802 on the SD card board. For XV-THS9 and XV-THS7 models (See Fig.4.) (3) Remove the screw C attaching the earth wires to the main board. (See Fig.4) Reference: When attaching the screw C, attach the earth wires with it. (See Fig.4) (4) From the bottom side of the main body, remove the four screws D attaching the front panel assembly. (See Fig.5) (5) Remove the front panel assembly in the direction of the ar- row while releasing the joint b. (See Fig.5) Fig.4 Fig.5 C CN452 Earth wire TH-S9,TH-S7 Earth wire CN451 CN802 Main board SD board DD b Front panel assembly (No.MB236)1-11 3.1.4Removing the rear panel (See Fig.6) Prior to performing the following procedures, remove the top cover assembly or metal cover. (1) From the back side of the main body, remove the twelve screws E and screw F attaching the rear panel. For XV- THS9 and XV-THS7 models (2) From the back side of the main body, remove the fourteen screws E and screw F attaching the rear panel. For XV- THS8 model (3) Release the engagement sections c and remove the rear panel from the main body.Fig.6 3.1.5Removing the audio signal I/O board (See Figs.7 and 8) Prior to performing the following procedures, remove the top cover assembly or metal cover. (1) From the back side of the main body, remove the screw G and three screws H attaching the audio signal I/O board to the rear panel. (See Fig.7) (2) From the top side of the main body, remove the screw J at- taching the audio signal I/O board to the chassis base. (See Fig.8) (3) Turn over the audio signal I/O board and disconnect the card wires from the connectors (CN441, CN442) on the for- ward side of the audio signal I/O board. (See Fig.8) 3.1.6Removing the tuner (See Figs.7 to 9) Prior to performing the following procedures, remove the top cover assembly or metal cover and audio signal I/O board. Reference: Disconnect the card wires from the connectors (CN441, CN442) on the audio signal I/O board as required. (See Fig.8.) (1) From the back side of the main body, remove the two screws K attaching the tuner to the rear panel. (See Fig.7) (2) From the top side of the main body, disconnect the card wire from the connector CN410 on the main board. (See Fig.9) (3) Take out the tuner from the main body. 3.1.7Removing the DVD mechanism assembly (See Fig.9) Prior to performing the following procedures, remove the top cover assembly or metal cover and audio signal I/O board. (1) From the top side of the main body, disconnect the card wires from the connectors (CN401 to CN403, CN408, CN409) on the main board. (2) Disconnect the card wire from the connector CN802 on the SD card board. For TH-S9 and TH-S7 models Reference: After connecting the card wire to the connector CN802 on the SD card board, fix the card wire with the spacers as before. (3) Remove the three screws L attaching the DVD mechanism assembly on the main body. (4) Take out the DVD mechanism assembly from the main body. Fig.7 Fig.8 Fig.9 E Rear panel E XV-THS8 EF cc G H K Rear panel Audio signal input/output board CN441 CN442 J Tuner Main board CN401CN403 CN409CN402 CN410 CN802 SD board CN408 DVD mechanism assembly LL L SpacerSpacer 1-12 (No.MB236) 3.1.8Removing the power board (See Figs.10 and 11) Prior to performing the following procedures, remove the top cover assembly or metal cover. (1) From the back side of the main body, remove the screw M attaching the power board to the rear