JVC-THS55-ddcs-sm维修电路原理图.pdf

SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB365 2005/4 DVD DIGITAL CINEMA SYSTEM MB36520054 TH-S55,TH-S66 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe EE - Russian Federation (SP-THS55F)(SP-THS55C)(SP-THS55S) (SP-PWS66) (SP-PWS55) (XV-THS55,XV-THS66) (SP-THS66F)(SP-THS66F)(SP-THS66C)(SP-THS66S) RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB365) SPECIFICATION Center unit (XV-THS66/XV-THS55) *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-PWS66/SP-PWS55) Audio sectionTotal Harmonic Distortion*10.02% Digital input*2DIGITAL IN(OPTICAL) : -21 dBm to -15 dBm (660 nm 30 nm) Video sectionVideo SystemPAL Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB(Composite signal when RGB is selected) Video output levelComposite : 1.0 V(p-p)/75 S-video-Y : 1.0 V(p-p)/75 S-video-C : 0.3 V(p-p)/75 Component-Y : 1.0 V(p-p)/75 Component-PB/PR : 0.7 V(p-p)/75 RGB : 0.7 V(p-p)/75 Tuner sectionTuning RangeFM : 87.50 MHz to 108.00 MHz AM (MW) : 522 kHz to 1 629 kHz GeneralPower RequirementsAC 230 V , 50 Hz Power Consumption17 W (at operation) 1.3 W (in standby mode) Dimensions (W H D)435 mm 55 mm 304 mm Mass2.5 kg Amplifier sectionFront140 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion. Center/Surround130 W per channel, RMS at 4 at 1 kHz, with 10 % total harmonic distortion. Subwoofer140 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion. Speaker sectionSpeaker unit16 cm Bass-reflex Power Handling Capacity140 W Impedance4 Frequency Range30 Hz to 200 Hz GeneralPower RequirementsAC 230 V , 50 Hz Power Consumption135 W (at operation) 0 W (in standby mode) Dimensions (W H D)170 mm 411 mm 451 mm Mass11.5 kg RadioFans.CN 收音机爱 好者资料库 (No.MB365)1-3 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.MB365) 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 DVD pickup (No.MB365)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.MB365) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB365)1-9 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the metal cover (See Figs.1 to 3) (1) From the both sides of the main body, remove the four screws A attaching the metal cover. (See Figs.1 and 2) (2) From the back side of the main body, remove the five screws B attaching the metal cover. (See Fig.3) (3) Lift the rear section of the metal cover upward while ex- tending the lower sections of the metal cover. (See Fig.3) Fig.1 Fig.2 Fig.3 A Metal cover A Metal cover Metal cover B 1-10 (No.MB365) 3.1.2Removing the front panel assembly (See Figs.4 to 7) Prior to performing the following procedures, remove the metal cover. (1) From the top side of the main body, disconnect the parallel wires from the connector CN420 on the main board. (See Fig.4) (2) Disconnect the parallel wires from the connectors CN451, CN452 and CN460 on the main board. (See Fig.4) (3) Remove the screw C attaching the earth wire to the main board. (See Fig.4) (4) Remove the earth wire attaching to the chassis base. (See Fig.4) Reference: When attaching the screw C, attach the earth wire with it. (See Fig.4) (5) From the bottom side of the main body, remove the three screws D attaching the front panel assembly. (See Fig.5) (6) Remove the front panel assembly in the direction of the ar- row while releasing the two joints a and two joints b. (See Fig.5 to 7) Fig.4 Fig.5 Fig.6 Fig.7 C CN452CN460 Earth wireFront panel assembly CN451 CN420 Main board D Front panel assembly Joint a Front panel assembly Joint b Front panel assembly Joint b (No.MB365)1-11 3.1.3Removing the rear panel (See Fig.8) Prior to performing the following procedures, remove the metal cover. (1) From the back side of the main body, remove the screw E and ten screws F attaching the rear panel. Fig.8 3.1.4Removing the Audio signal input/output board (See Figs.9 and 10) Prior to performing the following procedures, remove the metal cover. (1) From the back side of the main body, remove the screw E, two screws G attaching the Audio signal input/output board to the rear panel. (See Fig.9) (2) Take out the Audio signal input/output board, and discon- nect the card wires from the connectors CN411 and CN412 on the Audio signal input/output board. (See Fig.10) 3.1.5Removing the tuner assembly (See Figs.9 and 11) Prior to performing the following procedures, remove the metal cover and Audio signal input/output board. (1) From the back side of the main body, remove the two screws H attaching the tuner assembly to the rear panel. (See Fig.9) (2) From the top side of the main body, disconnect the card wire from the connector CN410 on the main board. (See Fig.11) (3) Take out the tuner assembly from the main body. 3.1.6Removing the DVD mechanism assembly (See Fig.11) Prior to performing the following procedures, remove metal cover and Audio signal input/output board. (1) From the top side of the main body, disconnect the card wires from the connectors CN401, CN402 and CN408 on the main board. (2) Remove the screw J attaching the DVD mechanism as- sembly on the main body. Fig.9 Fig.10 Fig.11 E F Rear panel E G H Rear panel CN412CN411 Audio signal input/output board J CN401 CN408 CN410 Tuner assembly CN402 DVD mechanism assembly Main board 1-12 (No.MB365) 3.1.7Removing the power board (See Figs.12 and 14) Prior to performing the following procedures, remove the metal cover. (1) From the back side of the main body, remove the screw K attaching the power board to the rear panel. (See Fig.12) (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.13) (3) Remove the two screws L attaching the power board. (See Fig.13) (4) Release the holder using a pliers and take out the trans- former board from the main body. Reference: Remove the rear panel as required. (See 3.1.3 Removing the rear panel) 3.1.8Removing the main board (See Fig.14) Prior to performing the following procedures, remove the metal cover, rear panel, Audio signal input/output board and tuner assembly. (1) From the top side of the main body, disconnect the card wires from the connectors CN401, CN402, CN408, CN451, CN452 and CN460 on the main board. (2) Disconnect the parallel wires from the connectors CN404 to CN407 and CN420 on the main board. (3) From the top side of the main body, remove the two screws M, screw M attaching the main board on the main body. (4) Take out the main board from the main body. Reference: When attaching the screw M, attach the earth wire with it. (See Fig.12.) Fig.12 Fig.13 Fig.14 K Rear panel CN404CN406 CN405CN407 Main board Power board L M M CN404 CN451 CN460 CN406 CN405CN407 CN420 CN402 CN401 CN452 Main board M CN408 (No.MB365)1-13 3.2Front panel assembly section Prior to performing the following procedures, remove the metal cover and front panel assembly. 3.2.1Removing the HP board (See Fig.1) (1) From the inside of the front panel assembly, remove the two screws A attaching the HP board. (2) Take out the HP board from the front panel assembly. 3.2.2Removing the KEY board (See Fig.1) Prior to performing the following procedures, remove the metal cover and front panel assembly. (1) From the inside of the front panel assembly, remove the three screws B attaching the KEY board. (2) Take out the KEY board from the front panel assembly. Fig.1 3.2.3Removing the FL board (See Fig.2) Prior to performing the following procedures, remove the metal cover and front panel assembly. (1) From the inside of the front panel assembly, remove the screw C attaching the FL board. (2) Take out the FL board from the fr