JVC-THS3-ddcs-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB187 2004/5 DVD DIGITAL CINEMA SYSTEM MB18720045 TH-S3 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2、 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-

3、8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . 1-27 Area suffix A - Australia B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe EE - Russian Federation XV-THS3 SP-WS3 SP-THS3F SP-THS3F RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB187) SPECIFICATION Center unit (XV-THS3) *1 : Corresponding to Linear PCM, Dolby Digital, and DTS

5、 Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48kHz) Front speakers (SP-THS3F) Center speaker (SP-THS3F) Surround speakers (SP-THS3F) Subwoofer (SP-WS3) Designs furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3)

6、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 character

7、istics. 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)

8、 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 d

9、ress 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

10、 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 settin

11、g 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.MB187)1-5 1.6Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity s

12、tored 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

13、) 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) o

14、n 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

15、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

16、 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 pi

17、n 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 i

18、t. 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,

19、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 sect

20、ion Card wire Connector 1-6 (No.MB187) 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 Las

21、er 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

22、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 : Vi

23、sible 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 nkyvll

24、e 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

25、 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 suoj

26、alukitus 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.MB187)1-7 SECTION 2

27、SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MB187) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the metal cover (See Figs.1 to 4) (1) From the both sides of the main body, remove the four screws A attaching the metal cover. (

28、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 in the direction of the arrow while extending the lower sections of the metal cov- er, release the claws a using a longer screwdri

29、ver from the inside as required. (See Fig.4.) Note: Do not damage any parts and boards inside the main body when releasing the joints a using the longer screwdriver. (See Fig.4.) Fig.1 Fig.2 Fig.3 Fig.4 A Metal cover A Metal cover BB B Metal cover a Metal cover a (No.MB187)1-9 3.1.2Removing the fron

30、t panel assembly (See Figs.5 to 7) Remove the metal cover. (1) From the right side of the DVD mechanism assembly, push the slide cam and pull the tray assembly out of the main body in the direction of the arrow. (See Fig.5.) (2) From the front side of the main body, remove the CD fitting assembly fr

31、om the tray assembly in the direction of the ar- row and push in the tray assembly as before. (See Fig.6.) (3) From the top side of the main body, disconnect the card wire from the connector CN428 on the main board. (See Fig.5.) Reference: When reassembling, connect the card wire to the con- nector

32、CN428 on the main board after passing it through the lower part of the holder board. (See Fig.5.) (4) Disconnect the card wire from the connectors CN454 on the HP terminal board. (See Fig.5.) (5) From the bottom side of the main body, remove the three screws C attaching the front panel assembly. (Se

33、e Fig.7.) (6) From the both and bottom sides of the main body, remove the front panel assembly in the direction of the arrow while releasing the engagement sections b and c. (See Fig.7.) Fig.5 Fig.6 Fig.7 Slide cam DVD mechanism assembly Tray assembly Front panel assembly Card wire CN454 HP terminal

34、 board Holder board CN428 Main board DVD mechanism assembly Front panel assembly CD fitting assembly bb c C Front panel assembly 1-10 (No.MB187) 3.1.3Removing the DVD mechanism assembly (See Figs.5,6 and 8) Remove the metal cover. (1) From the right side of the DVD mechanism assembly, push the slide

35、 cam and pull the tray assembly out of the main body in the direction of the arrow. (See Fig.5.) (2) From the front side of the main body, remove the CD fitting assembly from the tray assembly in the direction of the ar- row and push in the tray assembly as before. (See Fig.6.) (3) From the top side

36、 of the main body, disconnect the card wires from the connectors (CN422 to CN426) on the main board. (See Fig.8.) (4) Disconnect the wire from the connector CN430 on the main board. (See Fig.8.) (5) Remove the three screws D attaching the DVD mechanism assembly on the chassis base. (See Fig.8.) Refe

37、rence: When attaching the DVD mechanism assembly, align the holes of the chassis base to the projections d of the DVD mechanism assembly. (See Fig.8.) 3.1.4Removing the HP terminal board (See Fig.8) Remove the metal cover and front panel assembly. (1) From the top side of the main body, remove the s

38、crew E at- taching the HP terminal board on the chassis base. (2) Take out the HP terminal board from the main body. Reference: When attaching the HP terminal board, align the hole on the HP terminal board to the projection e of the chassis base be- fore attaching the screw E. Fig.8 3.1.5Removing th

39、e rear panel (See Fig.9) Remove the metal cover. (1) From the back side of the main body, remove the strain re- lief attaching the power cord in the direction of the arrow. (2) Remove the eight screws F and two screws F attaching the rear panel. B/E/EN/EV/EE version (3) Remove the eight screws F att

40、aching the rear panel. A version (4) Release the engagement sections f and remove the rear panel from the main body. Fig.9 d D D CN425 CN422 CN423 CN430 CN424 CN426 Card wires Wire D Card wires Main board HP terminal board e E Chassis base DVD mechanism assembly F Rear panel F Strain relief Power co

41、rd ff F (No.MB187)1-11 3.1.6Removing the tuner assembly (See Figs.10 and 11) Remove the metal cover. (1) From the top side of the main body, disconnect the card wire from the connector CN1 on the tuner assembly. (See Fig.10.) (2) From the back side of the main body, remove the screw G attaching the

42、tuner assembly to the rear panel. (See Fig.11.) (3) Take out the tuner assembly from the main body. 3.1.7Removing the scart terminal board B/E/EN/EV/EE version (See Figs.10 and 11) Remove the metal cover. (1) From the top side of the main body, disconnect the card wire from the connector CN340 on th

43、e scart terminal board. (See Fig.10.) (2) From the back side of the main body, remove the two screws H attaching the scart terminal board to the rear pan- el. (See Fig.11.) (3) Take out the scart terminal board from the main body. Fig.10 Fig.11 CN340 Scart terminal board Card wires CN1 Tuner assembl

44、y HRear panel G 1-12 (No.MB187) 3.1.8Removing the main board (See Figs.12 and 13) Remove the metal cover. (1) From the top side of the main body, disconnect the card wires from the connectors (CN341, CN422 to CN428) on the main board. B/E/EN/EV/EE version (See Fig.12.) (2) From the top side of the m

45、ain body, disconnect the card wires from the connectors (CN422 to CN428) on the main board. A version (See Fig.12.) (3) Disconnect the wires from the connectors (CN190, CN430, CN901) on the main board. (See Fig.12.) Reference: After connecting the wires to the connectors (CN190, CN901), fix the wire

46、s with the wire holder. (See Fig.12.) (4) Disconnect the power cord and wire from the connectors (CN950, CN953) on the transformer board. (See Fig.12.) (5) Remove the three screws J and screw J attaching the main board on the chassis base. (See Fig.12.) Reference: When attaching the screw J, attach

47、the wire holder with it. (See Fig.12.) (6) From the back side of the main body, remove the six screws K attaching the main board to the rear panel. (See Fig.13.) (7) Release the engagement sections g and remove the rear panel together with the scart terminal board and tuner as- sembly. (See Fig.13.)

48、 (8) Take out the main board from the main body. Reference: When attaching the main board, align the hole on the main board to the projections h of the chassis base before attaching the screws J and J. (See Fig.12.) Fig.12 Fig.13 CN950 CN428 Main board Transformer board Wires Card wiresWire holder C

49、N953 J CN190 CN901 J h Power cord h J Chassis base Card wire CN427 CN425 Card wires CN423 CN422 CN430 CN424 CN426 CN341 J Rear panel K gg (No.MB187)1-13 3.1.9Removing the heat sink (See Fig.14) Remove the metal cover and main board. From the reverse side of the main board, remove the four screws L attaching the heat sink. Fig.14 3.1.10 Removing the transformer board (See Fig.15) Re