JVC-THD7-ddcs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2007 Victor Company of Japan, LimitedNo.MB6382007/9DVD DIGITAL CINEMA SYSTEMMB63820079 SERVICE MANUALTH-D7B, TH-D7E, TH-D7EN, TH-D7EV, TH-D7A, TH-D7US, TH-D7UX, TH-D7UGCOPYRIGHT 2007 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melt

2、ing point : 219 Centigrade)Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-82SPECIFIC S

3、ERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-123DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-124ADJUSTMENT .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-255TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29XV-TH

5、D7B,E,EN,EV onlySP-THD7WSP-THD7F SP-THD7C SP-THD7SRadioFans.CN 收音机爱 好者资料库1-2 (No.MB638)SPECIFICATIONB,E,EN,EVCenter unit*1 Corresponding to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output powerFront140 W per channel RMS at 4 at 1 kHz with 10

6、 % total harmonic distortion.Center130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.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.Audio sectionDigital Input*1 DIGITAL INOPTICAL-21 dBm t

7、o -15 dBm (660 nm 30 nm)COAXIAL0.5V(p-p)/75Video sectionVideo SystemPALHorizontal Resolution500 linesSignal-to-Noise Ratio (Composite signal when “RGB” is selected)54 dBVideo Output Level(AV-Scart)Composite video 1.0 V(p-p)/75 YC1.0 V(p-p)/75 0.3 V(p-p)/75 RGB0.7 V(p-p)/75 (VIDEO OUT) Component(Y):

8、1.0 V(p-p)/75 (PB/PR): 0.7V(p-p)/75Video Input Sensitivity/Impedance (VIDEO IN)Composite1.0 V(p-p)/75 S-video(Y): 1.0 V(p-p)/75 (C): 0.3 V(p-p)/75 HDMIHDMI Input (VIDEO 1 IN)PASS THROUGH (up to 225 MHz)HDMI Output (MONITOR OUT)576p/720p/1080iUSB storageUSB SpecificationCompatible with USB 2.0 Full S

9、peedCompatible DeviceMass Storage ClassCompatible File SystemFAT16, FAT32Bus Power SupplyMax. 500 mATuner sectionTuner RangeFM87.50 MHz to 108.00 MHzAM (MW)522 kHz to 1 629 kHzGeneralPower RequirementsAC 230 V , 50 HzPower Consumption160 W (during operation)1.0 W (in standby mode)Dimensions (W H D)4

10、35 mm 115 mm 270 mmMass6.8 kgRadioFans.CN 收音机爱 好者资料库(No.MB638)1-3Subwoofer (SP-THD7W)Front speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)TypeBass-Reflex TypeSpeaker20 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range28 Hz to 200 HzSound Pressure Level75 dB/WmD

11、imensions (W H D)353.5 mm 351 mm 248 mmMass8.5 kgType2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone x 23 cm dome x 1Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level83 dB/WmDimensions (W x H x D)280 mm x 1 100 mm x 280 mm (wit

12、h stand)280 mm x 594 mm x 280 mm (without stand)Mass8.9 kg each (with stand)6.5 kg each (without stand)Type1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 2Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level84 dB/WmDimensions (W

13、H D)435 mm 100 mm 118 mmMass2.2 kgType1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level77 dB/WmDimensions (W H D)98.5 mm 215 mm 118 mmMass1.0 kg each1-4 (No.MB638)ACenter unit* Correspondi

14、ng to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output powerFront140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Center130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.Surround130 W per channel RMS at 4 at 1

15、 kHz with 10 % total harmonic distortion.Subwoofer140 W RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio sectionDigital Input* DIGITAL INOPTICAL-21 dBm to -15 dBm (660 nm 30 nm)COAXIAL0.5 V(p-p)/75 Analog inputVIDEO 2 AUDIO INVideo sectionVideo SystemPAL/NTSCHorizontal Resolution500 line

16、sSignal-to-Noise Ratio64 dBVideo Output LevelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-CFor PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 Video Input Sensitivity/ImpedanceComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-CFor PAL:

17、0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 HDMIHDMI Input (VIDEO 1 IN)PASS THROUGH (up to 225 MHz)HDMI Output (MONITOR OUT)For PAL576p/720p/1080iFor NTSC480p/720p/1080iUSB storageUSB SpecificationCompatible with USB 2.0 Full SpeedCompatible DeviceMass Storage ClassCompatible File SystemFAT16, FAT32Bus

18、Power SupplyMax. 500 mATuner sectionTuner RangeFM87.50 MHz to 108.00 MHzAMAt 10 kHz intervals: 530 kHz to 1 710 kHzAt 9 kHz intervals: 531 kHz to 1 710 kHzGeneralPower RequirementsAC 240 V , 50 HzPower Consumption160 W (during operation)4.0 W (in standby mode)Dimensions (W H D)435 mm 115 mm 270 mmMa

19、ss6.8 kg(No.MB638)1-5SubwooferFront speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)TypeBass-Reflex TypeSpeaker20 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range28 Hz to 200 HzSound Pressure Level75 dB/WmDimensions (W H D)353.5 mm 351 mm 248 mmMass8.5 kgType2-

20、Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 23 cm dome 1Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level83 dB/WmDimensions (W H D)280 mm x 1 100 mm x 280 mm (with stand)280 mm x 594 mm x 280 mm (without stand)Mass8.9 kg each

21、 (with stand)6.5 kg each (without stand)Type1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 2Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level84 dB/WmDimensions (W H D)435 mm 100 mm 118 mmMass2.2 kgType1-Way Bass-Reflex Type (M

22、agnetically Shielded Type)Speaker8 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level77 dB/WmDimensions (W H D)98.5 mm 215 mm 118 mmMass1.0 kg each1-6 (No.MB638)US,UX,UGCenter unit*1 Corresponding to Linear PCM Dolby Digital and DTS Digital Surround

23、 (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output powerFront140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Center130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.Surround130 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Subwoofer140 W

24、 RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio sectionDigital Input*1 DIGITAL INOPTICAL-21 dBm to -15 dBm (660 nm 30 nm)COAXIAL0.5V(p-p)/75Analog inputVIDEO 2 AUDIO INAnalog outputAUDIO OUTVideo sectionVideo SystemPAL/NTSCHorizontal Resolution500 linesSignal-to-Noise Ratio64 dBVideo O

25、utput LevelComposite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-CFor PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 Component-Y1.0 V(p-p)/75 Component-PB/PR0.7 V(p-p)/75 Video Input Sensitivity/Impedance(VIDEO 2 IN)Composite1.0 V(p-p)/75 S-video-Y1.0 V(p-p)/75 S-video-CFor PAL: 0.3 V(p-p)/75 For NTSC

26、: 0.286 V(p-p)/75 HDMIHDMI Input (VIDEO 1 IN)PASS THROUGH (up to 225 MHz)HDMI Output (MONITOR OUT)For PAL576p/720p/1080iFor NTSC480p/720p/1080iUSB storageUSB SpecificationCompatible with USB 2.0 Full SpeedCompatible DeviceMass Storage ClassCompatible File SystemFAT16, FAT32Bus Power SupplyMax. 500 m

27、ATuner sectionTuner RangeFM87.50 MHz to 108.00 MHzAM (At 10 kHz intervals) For Saudi Arabia: 530 kHz to 1 600 kHzFor the other countries: 530 kHz to 1 710 kHzAM (At 9 kHz intervals)For Saudi Arabia: 531 kHz to 1 602 kHzFor the other countries: 531 kHz to 1 710 kHzGeneralPower RequirementsAC 110 V/12

28、7 V/220 V - 240 V 50/60 Hz (selectable with the voltage selector)Power Consumption160 W (during operation)4.0 W (in standby mode)Dimensions (W H D)435 mm 115 mm 270 mmMass6.8 kg(No.MB638)1-7Subwoofer (SP-THD7W)Front speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)TypeBass-Ref

29、lex TypeSpeaker20 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range28 Hz to 200 HzSound Pressure Level75 dB/WmDimensions (W H D)353.5 mm 351 mm 248 mmMass8.5 kgType2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 23 cm dome 1Power Handling Capacity140 WImpe

30、dance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level83 dB/WmDimensions (W H D)280 mm x 1 100 mm x 280 mm (with stand)280 mm x 594 mm x 280 mm (without stand)Mass8.9 kg each (with stand)6.5 kg each (without stand)Type1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm con

31、e 2Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSound Pressure Level84 dB/WmDimensions (W H D)435 mm 100 mm 118 mmMass2.2 kgType1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker8 cm cone 1Power Handling Capacity140 WImpedance4 Frequency Range75 Hz to 20 000 HzSoun

32、d Pressure Level77 dB/WmDimensions (W H D)98.5 mm 215 mm 118 mmMass1.0 kg each1-8 (No.MB638)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protection, no changes should be

33、 madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design al

34、terations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial

35、 safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement components rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristi

36、cs are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. The use of a substitutereplacement which does not have the same safety charac-teristics as the recommended

37、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 ties,clamps, tubings, barriers and the like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prev

38、ention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product, always perform an isola-tion

39、 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 productis safe to operate without danger of electrical shock.Do notuse a line isolation transformer during this check. Plug the AC line cord di

40、rectly into the AC outlet. Using aLeakage Current Tester, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed 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

41、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. Connect 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

42、 across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measure

43、d any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs mus

44、t be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check setting for localvoltage.1.3CautionBurrs formed during molding may be left over on some partsof the chassis. Th

45、erefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and

46、 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 specified by the manufacturer. (This regulation dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(H

47、aving 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB638)1-91.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-tinued protection, no changes should be made to the original

48、 design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal inju

49、ry 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 neverbe replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe p

50、roduct have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same safety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and may