JVC-THS51-ddcs-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB180 2004/4 DVD DIGITAL CINEMA SYSTEM MB18020044 TH-S5, TH-S51 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29 Area suffix B - U.K. TH-S51 Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe TH-S5 TH-S5TH-S51 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB180) SPECIFICATION Center unit (XV-THS5/XV-THS51) *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) Subwoofer (SP-PWS5/SP-PWS51) 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. (No.MB180)1-5 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 c 1-6 (No.MB180) 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 (No.MB180)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MB180) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Figs.1 to 3) (1) From the both sides of the main body, remove the four screws A attaching the top cover. (See Figs.1 and 2) (2) From the back side of the main body, remove the three screws B attaching the top cover. (See Fig.3) (3) Lift the rear section of the top cover upward while extend- ing the lower sections of the top cover. (See Fig.3) Fig.1 Fig.2 Fig.3 A Top cover A Top cover BTop cover (No.MB180)1-9 3.1.2Removing the front panel assembly (See Figs.4 and 5) Prior to performing the following procedures, remove the top cover. (1) From the top side of the main body, disconnect the parallel wires from the connectors CN451 and CN452 on the main board. (See Fig.4) (2) Remove the screw C attaching the earth wire to the main board. (See Fig.4) Reference: When attaching the screw C, attach the earth wire with it. (See Fig.4) (3) From the bottom side of the main body, remove the four screws D attaching the front panel assembly. (See Fig.5) (4) Remove the front panel assembly in the direction of the ar- row while releasing the joint a. (See Fig.5) Fig.4 Fig.5 3.1.3Removing the rear panel (See Fig.6) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the four screws E, screw F and ten screws G attaching the rear panel. Fig.6 C CN452 Earth wire Front panel assembly CN451 Main board D D Joint a Front panel assembly E G Rear panel FG 1-10 (No.MB180) 3.1.4Removing the DSP board (See Figs.7 and 8) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the screw F and three screws H attaching the DSP board to the rear panel. (See Fig.7) (2) From the top side of the main body, remove the screw J at- taching the DSP board to the main body. (See Fig.8) (3) Take out the DSP board, and disconnect the card wires from the connectors CN441 and CN442 on the DSP board. (See Fig.8) 3.1.5Removing the tuner (See Figs.7 and 9) Prior to performing the following procedures, remove the top cover and DSP board. (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. 3.1.6Removing the DVD mechanism assembly (See Fig.9) Prior to performing the following procedures, remove top cover and DSP board. (1) From the top side of the main body, disconnect the card wires from the connectors CN401 to CN403, CN408 and CN409 on the main board. (2) Remove the three screws L attaching the DVD mechanism assembly on the main body. (3) Take out the DVD mechanism assembly to the upward di- rection. Note: When attaching the DVD mechanism assembly, connect the card wires to the connectors at first. Fig.7 Fig.8 Fig.9 F H K J CN441 CN442 DSP board M (No.MB180)1-11 3.1.7Removing the power board (See Figs.10 and 11) Prior to performing the following procedures, remove the top cover. (1) From the back side of the main body, remove the screw M attaching the power board to the rear panel. (See Fig.10) (2) From the top side of the main body, disconnect the parallel wires from the connectors CN404 to CN407 on the main board. (See Fig.11) (3) Remove the three screws N attaching the power board. (See Fig.11) (4) Take out the power board from the main body. Reference: Remove the rear panel as required. (See 3.1.3 Removing the rear panel) Fig.10 Fig.11 3.1.8Removing the main board (See Fig.12) Prior to performing the following procedures, remove the top cover, rear panel, DSP board and tuner. (1) From the top side of the main body, disconnect the card wires from the connectors CN401 to CN403, CN408, CN409, CN451 and CN452 on the main board. (2) Disconnect the parallel wires from the connectors CN404 to CN407 on the main board. (3) From the top side of the main body, remove the three screws P attaching the main board on the main body. (4) Take out the main board from the main body. Fig.12 Tuner LL L CN410 CN402CN409 CN403CN401 Main board CN408 DVD mechanism assembly CN404CN406 CN405CN407 Main board Power board N P CN404 CN452CN451 CN406 CN405 CN407 CN401 CN409CN402 CN403 Main board PCN408 1-12 (No.MB180) 3.2Front panel assembly section Prior to performing the following procedures, remove the top cover and front panel assembly. 3.2.1Removing the FL board (See Fig.1) (1) From the inside of the front panel assembly, remove the screw A attaching the FL board. (2) Take out the FL board from the front panel assembly. Reference: When attaching the FL board, align the section a of the front panel assembly to the right side of the FL board. After attaching the FL board, passing the card wire through the Hook b. Fig.1 3.2.2Removing the SW board (See Figs.2 to 3) (1) From the front side of the front panel assembly, remove the volume jog from the front panel assembly forward. (2) From the inside of the front panel assembly, release the seven claws c attaching the front cover. (3) Remove the front cover to the direction of the arrow. (4) Remove the three screws B attaching the SW board, and take out the SW board. Fig.2 Fig.3 A Hooks b FL boardSection a Volume jog Front assembly B Claws c SW boardFront cover (No.MB180)1-13 3.3DVD mechanism section Remove the DVD mechanism assembly from the main body. (See 3.1.6 Removing the DVD mechanism assembly.) 3.3.1Removing the tray assembly (See Figs.1 to 3) (1) From the right side of the DVD mechanism assembly, push the slide cam and pull the tray assembly out of the DVD mechanism assembly in the direction of the arrow. (See Fig.1.) (2) From the top side of the DVD mechanism assembly, re- move the two screws A attaching the leaf spring to the bushing and remove the leaf spring. (See Fig.2.) (3) Remove the bushing of the tray assembly from the projec- tion a on the DVD mechanism assembly and move the tray assembly in the direction of the arrow. (See Fig.3.) (4) Remove the claw b of the tray assembly from the DVD mechanism assembly and take out the tray assembly. (See Fig.3.) Fig.1 Fig.2 Fig.3 Tray assemblyDVD mechanism assembly Slide cam Bushing Leaf spring A DVD mechanism assembly Bushing Claw b Projection a Tray assembly DVD mechanism assembly 1-14 (No.MB180) 3.3.2Removing the traverse mechanism assembly (See Figs.4) (1) From the bottom side of the DVD mechanism assembly, re- move the four screws B attaching the traverse mechanism assembly and take out the DVD traverse mechanism as- sembly with the DVD servo board. Fig.4 3.3.3Removing the DVD servo board (See Figs.5 and 6) Remove the traverse mechanism assembly. (1) From the side of the traverse mechanism assembly, solder the short land sections c on the pickup. (See Fig.5.) (2) From the bottom side of th