JVC-THM65-ddcs-sm维修电路原理图.pdf

《JVC-THM65-ddcs-sm维修电路原理图.pdf》由会员分享，可在线阅读，更多相关《JVC-THM65-ddcs-sm维修电路原理图.pdf（42页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITED No.MB112 2003/12 DVD DIGITAL CINEMA SYSTEM MB112200312 TH-M65 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . 1-40 Area suffix US - Singapore UW - Brazil,Mexico,Peru UJ - U.S.Military UG - Turkey,South Africa,Egypt XV-THM65 SP-PWM65SP-THM65CSP-THM65FSP-THM65FSP-THM65FSP-THM65F RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB112) SPECIFICATION Designs & specifications are subject to change without notice. Cente

5、r unit (XV-THM65) AudioAudio input sensitivity/Impedance (at 1 kHz), Total Harmonic Distortion 0.02 % NOTE : This value is measured at System cord CONNECTOR for reference. Analog inputAUDIO IN (VCR)290 mV/47 K MIC4.3 mV/600 Digital input*DIGITAL IN (DBS)-21 dBm to -15 dBm (OPTICAL)(660 nm E30 nm) *

6、Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz) Digital outputDIGITAL OUT-21 dBm to -15 dBm (OPTICAL)(660 nm E30 nm) VideoColor SystemNTSC/PAL selectable Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video output l

7、evelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.286 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 Video input sensitivity/ Impedance (VCR IN) Composite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-C0.286 V(p-p)/75 TunerTuning RangeFM87.50 MHz to 108.00 MHz AM531 kHz to

8、1 602 kHz (at 9 kHz intervals) 530 kHz to 1 600 kHz (at 10 kHz intervals) GeneralPower RequirementsAC 110 - 230 V , 50 Hz/60 Hz Power Consumption20 W (at operation) 1.6 W (in standby mode) Dimensions (W H D)400 mm 85 mm 386 mm Mass4.6 kg Subwoofer (SP-PWM65) AmplifierFront/Center/Surround80 W per ch

9、annel, RMS at 6 at 1 kHz, with 10 % total harmonic distortion. Subwoofer120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion. SpeakerSpeaker unit20 cm Bass-reflex, Magnetically Shielded Frequency Range25 Hz to 200 Hz GeneralPower RequirementsAC 110 V/127 V/220 - 230 V selectable with the v

10、oltage selector, 50 Hz/60 Hz Power Consumption150 W (at operation) 0 W (in standby mode) Dimensions (W H D)235 mm 355 mm 492 mm Mass13.0 kg Satellite Speakers (SP-THM65F) Speakers5.5 cm 2 Bass-reflex, Magnetically Shielded Power Handling Capacity80 W Impedance6 Frequency Range90 Hz to 20 kHz Dimensi

11、ons (W H D)250 mm 1 103 mm 250 mm Mass3.77 kg Center Speaker (SP-THM65C) Speakers5.5 cm 2 Bass-reflex, Magnetically Shielded Power Handling Capacity80 W Impedance6 Frequency Range90 Hz to 20 kHz Dimensions (W H D)258 mm 75 mm 81 mm Mass0.95 kg RadioFans.CN 收音机爱 好者资料库 (No.MB112)1-3 SECTION 1 PRECAUTI

12、ON 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be

13、identical to those used in the original circuits. Services should be per- formed by qualified personnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manu

14、facturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual in

15、spection nor can the protection afforded by them necessarily be obtained by us- ing replacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having su

16、ch features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire,

17、 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 origi

18、nal lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals,

19、 knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a Leakage Current Tester, measure

20、 the leakage current from each exposed metal parts of the cabinet, particular- ly any exposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent must not exceed 0.5mA AC (r.m.s.). Alternate check method Plug the AC line cord directly into the AC outle

21、t. Use an AC voltmeter having, 1,000 per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- posed metal part and a known good earth ground. Measure the AC voltage across the resistor with the AC voltmeter. Move the re

22、sistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This cor

23、responds to 0.5 mA AC (r.m.s.). 1.2Warning (1) This equipment has been designed and manufactured to meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety standards are maintained. (3) Repairs must be made in accordance with the relevant s

24、afety standards. (4) It is essential that safety critical components are replaced by approved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burr

25、s in the case of pre- forming repair of this system. 1.4Critical parts for safety In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the

26、 mark nearby are critical for safety. When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts,

27、 or more sensitivity) 1500 10W 0.15 F AC TYPE 1-4 (No.MB112) 1.5Preventing static electricity 1.5.1Grounding to prevent damage by 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

28、traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.5.2About the earth processing for the destruction prevention by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use p

29、roper 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

30、 to release any static electricity built up in your body. 1.5.3Handling the optical pickup (1) In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pick- up are shorted. After replacement, return the shorted parts to their or

31、iginal condition. (Refer to the text.) (2) 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. 1.5.4Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup)

32、 to strong shocks, as it is a sensitive, complex unit. (2) Remove solder of the short lands on the flexible wire after replacing the optical pickup. For specific details, refer to the replace- ment procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to

33、take too long a time when attaching it to the connector. (3) Handle the flexible wire carefully as it may break when subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.5.5Attention when traverse unit is decomposed *Plea

34、se refer to Disassembly method in the text for the DVD pickup. Apply solder to the short circuit points before the flexible wire is disconnected from the connector on the DVD pickup. (If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.

35、) In the assembly, be sure to remove solder from the short circuit points after connecting the flexible wire. Conductive material (conductive sheet) or iron plate (caption) Anti-static wrist strap DVD pickup DVD changer mechanism assembly Short circuit points (No.MB112)1-5 1.6Important for laser pro

36、ducts 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.CA

37、UTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open and the safety interlocks have failed or are de feated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunct

38、ion, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. CL

39、ASS 1 LASER PRODUCT CLASS 1 LASER PRODUCT LABEL REPRODUCTION AND POSITION OF LABELS WARNING LABEL (Inside) 1-6 (No.MB112) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB112)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removin

40、g the metal cover (See Figs.1 to 4) (1) From the right and left 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 three screws B attaching the metal cover. (See Fig.3.) (3) Lift the rear section of the

41、metal cover in the direction of the arrow while extending the lower sections of the metal cover, release the claws a using a longer screwdriver 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 a longer screwdriv

42、er.Fig.1 Fig.2 Fig.3 Fig.4 Metal cover A Metal cover A Metal cover Rear panel B Metal cover Claws aClaws a 1-8 (No.MB112) 3.1.2Removing the front panel assembly (See Figs.5 and 6) Prior to performing the following procedures, remove the metal cover. (1) From the top side of the main body, disconnect

43、 the parallel wires from the connectors (CN408,CN409) on the main board. (See Fig.5.) (2) Disconnect the card wires from the connectors (CN407, CN413) on the main board. (See Fig.5.) US/UW/UG version (3) Disconnect the card wires from the connectors (CN407, CN412) on the main board. (See Fig.5.) UJ

44、version (4) Remove the screw C attaching the earth wire to the main board. (See Fig.5.) (5) From the bottom side of the main body, remove the three screws D attaching the front panel assembly. (See Fig.6.) (6) Release the two hooks b and hook c from the both and bottom sides of the main body, and re

45、move the front panel assembly in the direction of the arrow. (See Figs.5 and 6.) Fig.5 Fig.6 CN407 CN413 CN409 CN408 Hook bHook b Main board C Card wire Earth wire Parallel wires Front panel assembly Card wire CN412 Card wire Hook c Front panel assembly D (No.MB112)1-9 3.1.3Removing the DVD changer

46、mechanism assembly (See Fig.7) Prior to performing the following procedures, remove the metal cover and front panel assembly. (1) From the top side of the main body, disconnect the card wires from the connectors (CN405,CN415) on the main board. (2) Remove the four screws E attaching the DVD changer

47、mechanism assembly to the bottom chassis. (3) Take out the DVD changer mechanism assembly in an upward direction. Note: When attaching the screw E, fit the hole of the DVD changer mechanism assembly to the bosses d on the bottom chassis. Fig.7 3.1.4Removing the rear panel (See Fig.8) Prior to perfor

48、ming the following procedure, remove the metal cover. (1) From the back side of the main body, remove the screw F, ten screws G and three screws H attaching the rear panel. Fig.8 Main board Boss d Boss d CN405 CN415 Bottom chassis DVD changer mechanism assembly Card wires E E E FG G HH H Rear panel

49、1-10 (No.MB112) 3.1.5Removing the audio & digital input board (See Figs.9 and 10) Prior to performing the following procedures, remove the metal cover. (1) From the top side of the main body, disconnect the card wire from the connector CN401 on the audio & digital input board. (See Fig.9.) (2) Remove the screw J attaching the audio & digital input board. (See Fig.9.) (3) From the back side of the main body, remove the screw K and three screws L attaching the audio & digital input b