Jvc-THM-65-Service-Manual电路原理图.pdf

《Jvc-THM-65-Service-Manual电路原理图.pdf》由会员分享，可在线阅读，更多相关《Jvc-THM-65-Service-Manual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 MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB1122003/12DVD DIGITAL CINEMA SYSTEMMB112200312TH-M65TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32 SP

2、ECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74

3、ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-355 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . 1-40Area suffixUS - SingaporeUW - Brazil,Mexico,PeruUJ - U.S.MilitaryUG - Turkey,South Africa,EgyptXV-THM65SP-PWM65 SP-THM65C SP-THM65F SP-THM65F SP-THM65F SP-THM65F1-2 (No.MB112)SPECIFICATIONDesigns & specifications are subject to change without notice.Center unit (XV-THM65)Audio Audio input s

5、ensitivity/Impedance (at 1 kHz), Total Harmonic Distortion 0.02 %NOTE : This value is measured at System cord CONNECTOR for reference.Analog input AUDIO IN (VCR) 290 mV/47 KMIC 4.3 mV/600 Digital input* DIGITAL IN (DBS) -21 dBm to -15 dBm(OPTICAL) (660 nm E30 nm)* Corresponding to Linear PCM, Dolby

6、Digital, and DTS Digital Surround (with sampling frequency - 32 kHz, 44.1 kHz, 48 kHz)Digital output DIGITAL OUT -21 dBm to -15 dBm(OPTICAL) (660 nm E30 nm)Video Color System NTSC/PAL selectableHorizontal Resolution 500 linesSignal-to-Noise Ratio 64 dBVideo output level Composite 1.0 V(p-p)/75 S-vid

7、eo-Y 1.0 V(p-p)/75 S-video-C 0.286 V(p-p)/75 Component-Y 1.0 V(p-p)/75 Component-PB/PR 0.7 V(p-p)/75 Video input sensitivity/Impedance (VCR IN)Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C 0.286 V(p-p)/75 Tuner Tuning Range FM 87.50 MHz to 108.00 MHzAM 531 kHz to 1 602 kHz (at 9 kHz inte

8、rvals)530 kHz to 1 600 kHz (at 10 kHz intervals)General Power Requirements AC 110 - 230 V , 50 Hz/60 HzPower Consumption 20 W (at operation) 1.6 W (in standby mode)Dimensions (W H D) 400 mm 85 mm 386 mmMass 4.6 kgSubwoofer (SP-PWM65)Amplifier Front/Center/Surround 80 W per channel, RMS at 6 at 1 kHz

9、, with 10 % total harmonic distortion.Subwoofer 120 W, RMS at 4 at 100 Hz, with 10 % total harmonic distortion.Speaker Speaker unit 20 cm Bass-reflex, Magnetically ShieldedFrequency Range 25 Hz to 200 HzGeneral Power Requirements AC 110 V/127 V/220 - 230 V selectable with the voltage selector, 50 Hz

10、/60 HzPower Consumption 150 W (at operation) 0 W (in standby mode)Dimensions (W H D) 235 mm 355 mm 492 mmMass 13.0 kgSatellite Speakers (SP-THM65F)Speakers 5.5 cm 2 Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance 6 Frequency Range 90 Hz to 20 kHzDimensions (W H D) 250 mm 1 10

11、3 mm 250 mmMass 3.77 kgCenter Speaker (SP-THM65C)Speakers 5.5 cm 2 Bass-reflex, Magnetically ShieldedPower Handling Capacity 80 WImpedance 6 Frequency Range 90 Hz to 20 kHzDimensions (W H D) 258 mm 75 mm 81 mmMass 0.95 kg(No.MB112)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this p

12、roduct contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Servi

13、ces should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture o

14、f responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be ob

15、tained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onth

16、e Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with

17、ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they

18、 have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, control shafts, etc.) to be sure the

19、productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any expose

20、d metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connec

21、t a 1,500 10W resistorparalleled 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 ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath

22、to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet int

23、ernational safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains v

24、oltage selector is provided, check setting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appeari

25、ng on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specif

26、ied by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB112)1.5 Preventing static electricity1.5.1 Grounding to prevent damage by

27、static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.2 About the earth processing for the destructi

28、on prevention by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in devices such as DVD players.Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive mater

29、ial (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) Ground yourselfUse an anti-static wrist strap to release any static electricity built up in your body.1.5.3 Handling the optical pickup(1) In order to maintain quality during transpor

30、t 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 original 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 i

31、nternal power source can easilydestroy the laser diode.1.5.4 Handling 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) Remove solder of the short lands on the flexible wire after replacing the optical pic

32、kup. 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 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)

33、It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1.5.5 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the DVD pickup. Apply solder to the short circuit points before the flexible wire is disconnected fr

34、om the connector on the DVD pickup. (If the flexible wire is disconnected without applying solder, the DVD pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short circuit points after connecting the flexible wire.Conductive material (conductive sheet)

35、 or iron plate(caption)Anti-static wrist strapDVD pickupDVD changer mechanism assemblyShort circuit points(No.MB112)1-51.6 Important for laser products1.CLASS 1 LASER PRODUCT2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.3.CAUTION : Th

36、ere are no serviceable parts inside theLaser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions.4.CAUTION : The compact disc player uses invisible laserradiation and is equipped with safety switches whichprevent emission of radiation when the drawer is open a

37、nd 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 herein may result in hazardou

38、s radiation exposure.!Please use enough caution not to see the beam directly or touch it in case of an adjustment or operationcheck.CLASS 1LASER PRODUCTCLASS 1 LASER PRODUCT LABEL REPRODUCTION AND POSITION OF LABELSWARNING LABEL(Inside)1-6 (No.MB112)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service

39、 manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB112)1-7SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the metal cover (See Figs.1 to 4)(1) From the right and left sides of the main body, remove thefour screws A attaching the metal cover. (See Figs.1 and2.)(2) From the back sid

40、e of the main body, remove the threescrews B attaching the metal cover. (See Fig.3.)(3) Lift the rear section of the metal cover in the direction of thearrow while extending the lower sections of the metalcover, release the claws a using a longer screwdriver fromthe inside as required. (See Fig.4.)N

41、ote:Do not damage any parts and boards inside the main bodywhen releasing the joints a using a longer screwdriver. Fig.1Fig.2Fig.3Fig.4Metal coverAMetal coverAMetal coverRear panelBMetal coverClaws a Claws a1-8 (No.MB112)3.1.2 Removing the front panel assembly (See Figs.5 and 6) Prior to performing

42、the following procedures, remove the metalcover.(1) From the top side of the main body, disconnect the parallelwires from the connectors (CN408,CN409) on the mainboard. (See Fig.5.)(2) Disconnect the card wires from the connectors (CN407,CN413) on the main board. (See Fig.5.) US/UW/UGversion(3) Disc

43、onnect the card wires from the connectors (CN407,CN412) on the main board. (See Fig.5.) UJ version(4) Remove the screw C attaching the earth wire to the mainboard. (See Fig.5.)(5) From the bottom side of the main body, remove the threescrews D attaching the front panel assembly. (See Fig.6.)(6) Rele

44、ase the two hooks b and hook c from the both andbottom sides of the main body, and remove the front panelassembly in the direction of the arrow. (See Figs.5 and 6.)Fig.5Fig.6CN407CN413CN409CN408Hook bHook bMain boardCCard wireEarth wireParallel wiresFront panel assemblyCard wireCN412Card wireHook cF

45、ront panelassemblyD(No.MB112)1-93.1.3 Removing the DVD changer mechanism assembly (See Fig.7) Prior to performing the following procedures, remove the metalcover and front panel assembly.(1) From the top side of the main body, disconnect the cardwires from the connectors (CN405,CN415) on the mainboa

46、rd.(2) Remove the four screws E attaching the DVD changermechanism assembly to the bottom chassis.(3) Take out the DVD changer mechanism assembly in anupward direction.Note:When attaching the screw E, fit the hole of the DVD changermechanism assembly to the bosses d on the bottom chassis.Fig.73.1.4

47、Removing the rear panel (See Fig.8) Prior to performing the following procedure, remove the metalcover.(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.8Main boardBoss dBoss dCN405CN415Bottom chassisDVD changer mechanismassembly

48、Card wiresEEEFGGHHHRear panel1-10 (No.MB112)3.1.5 Removing the audio & digital input board (See Figs.9 and 10) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main body, disconnect the cardwire from the connector CN401 on the audio & digital inputboar

49、d. (See Fig.9.)(2) Remove the screw J attaching the audio & digital inputboard. (See Fig.9.)(3) From the back side of the main body, remove the screw Kand three screws L attaching the audio & digital input boardto the rear panel. (See Fig.10.)(4) Take out the audio & digital input board from the mainbody.3.1.6 Removing the tuner (See Figs.9 and 10) Prior to performing the following procedures, remove the metalcover.(1) From the top side of the main