Jvc-THD-7-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2007 Victor Company of Japan, LimitedNo.MB6382007/9DVD DIGITAL CINEMA SYSTEMMB63820079SERVICE 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, melti

2、ng point : 219 Centigrade)Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-82 SPECIFIC

3、SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-123 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-124 ADJUSTMEN

4、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-255 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-29

5、XV-THD7B,E,EN,EV onlySP-THD7WSP-THD7FSP-THD7C SP-THD7S1-2 (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 power Front 140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic

6、 distortion.Center 130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.Surround 130 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Subwoofer 140 W RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio section Digital Input*1 DIGITAL IN OPTICAL -21 dBm to -15 dBm (

7、660 nm 30 nm)COAXIAL 0.5V(p-p)/75Video section Video System PALHorizontal Resolution 500 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 RGB 0.7 V(p-p)/75 (VIDEO OUT) Component (Y): 1.

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

9、Full SpeedCompatible Device Mass Storage ClassCompatible File System FAT16, FAT32Bus Power Supply Max. 500 mATuner section Tuner Range FM 87.50 MHz to 108.00 MHzAM (MW) 522 kHz to 1 629 kHzGeneral Power Requirements AC 230 V , 50 HzPower Consumption 160 W (during operation)1.0 W (in standby mode)Dim

10、ensions (W H D) 435 mm 115 mm 270 mmMass 6.8 kg(No.MB638)1-3Subwoofer (SP-THD7W)Front speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)Type Bass-Reflex TypeSpeaker 20 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 28 Hz to 200 HzSound Pressure Level 75 dB/Wm

11、Dimensions (W H D) 353.5 mm 351 mm 248 mmMass 8.5 kgType 2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone x 23 cm dome x 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 83 dB/WmDimensions (W x H x D) 280 mm x 1 100 mm x 2

12、80 mm (with stand)280 mm x 594 mm x 280 mm (without stand)Mass 8.9 kg each (with stand)6.5 kg each (without stand)Type 1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 2Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 84 dB

13、/WmDimensions (W H D) 435 mm 100 mm 118 mmMass 2.2 kgType 1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 77 dB/WmDimensions (W H D) 98.5 mm 215 mm 118 mmMass 1.0 kg each1-4 (No.MB63

14、8)ACenter unit* Corresponding to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output power Front 140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Center 130 W RMS at 4 at 1 kHz with 10 % total harmonic distortion.Surround

15、130 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Subwoofer 140 W RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio section Digital Input* DIGITAL IN OPTICAL -21 dBm to -15 dBm (660 nm 30 nm)COAXIAL 0.5 V(p-p)/75 Analog input VIDEO 2 AUDIO INVideo section Video Syste

16、m PAL/NTSCHorizontal Resolution 500 linesSignal-to-Noise Ratio 64 dBVideo Output Level Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C For PAL: 0.3 V(p-p)/75 For NTSC: 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 Composite 1.0 V(

17、p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C For PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 HDMI HDMI Input (VIDEO 1 IN) PASS THROUGH (up to 225 MHz)HDMI Output (MONITOR OUT) For PAL 576p/720p/1080iFor NTSC 480p/720p/1080iUSB storage USB Specification Compatible with USB 2.0 Full SpeedCompatible Devi

18、ce Mass Storage ClassCompatible File System FAT16, FAT32Bus Power Supply Max. 500 mATuner section Tuner Range FM 87.50 MHz to 108.00 MHzAM At 10 kHz intervals: 530 kHz to 1 710 kHzAt 9 kHz intervals: 531 kHz to 1 710 kHzGeneral Power Requirements AC 240 V , 50 HzPower Consumption 160 W (during opera

19、tion)4.0 W (in standby mode)Dimensions (W H D) 435 mm 115 mm 270 mmMass 6.8 kg(No.MB638)1-5SubwooferFront speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)Type Bass-Reflex TypeSpeaker 20 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 28 Hz to 200 HzSound Pre

20、ssure Level 75 dB/WmDimensions (W H D) 353.5 mm 351 mm 248 mmMass 8.5 kgType 2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 23 cm dome 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 83 dB/WmDimensions (W H D) 280 mm x

21、1 100 mm x 280 mm (with stand)280 mm x 594 mm x 280 mm (without stand)Mass 8.9 kg each (with stand)6.5 kg each (without stand)Type 1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 2Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure

22、 Level 84 dB/WmDimensions (W H D) 435 mm 100 mm 118 mmMass 2.2 kgType 1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 77 dB/WmDimensions (W H D) 98.5 mm 215 mm 118 mmMass 1.0 kg each

23、1-6 (No.MB638)US,UX,UGCenter unit*1 Corresponding to Linear PCM Dolby Digital and DTS Digital Surround (with sampling frequency - 32 kHz 44.1 kHz 48 kHz)Output power Front 140 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Center 130 W RMS at 4 at 1 kHz with 10 % total harmonic

24、distortion.Surround 130 W per channel RMS at 4 at 1 kHz with 10 % total harmonic distortion.Subwoofer 140 W RMS at 4 at 100 Hz with 10 % total harmonic distortion.Audio section Digital Input*1 DIGITAL IN OPTICAL -21 dBm to -15 dBm (660 nm 30 nm)COAXIAL 0.5V(p-p)/75Analog input VIDEO 2 AUDIO INAnalog

25、 output AUDIO OUTVideo section Video System PAL/NTSCHorizontal Resolution 500 linesSignal-to-Noise Ratio 64 dBVideo Output Level Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C For PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 Component-Y 1.0 V(p-p)/75 Component-PB/PR 0.7 V(p-p)/75 Video In

26、put Sensitivity/Impedance(VIDEO 2 IN)Composite 1.0 V(p-p)/75 S-video-Y 1.0 V(p-p)/75 S-video-C For PAL: 0.3 V(p-p)/75 For NTSC: 0.286 V(p-p)/75 HDMI HDMI Input (VIDEO 1 IN) PASS THROUGH (up to 225 MHz)HDMI Output (MONITOR OUT) For PAL 576p/720p/1080iFor NTSC 480p/720p/1080iUSB storage USB Specificat

27、ion Compatible with USB 2.0 Full SpeedCompatible Device Mass Storage ClassCompatible File System FAT16, FAT32Bus Power Supply Max. 500 mATuner section Tuner Range FM 87.50 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

28、(At 9 kHz intervals) For Saudi Arabia: 531 kHz to 1 602 kHzFor the other countries: 531 kHz to 1 710 kHzGeneral Power Requirements AC 110 V/127 V/220 V - 240 V 50/60 Hz (selectable with the voltage selector)Power Consumption 160 W (during operation)4.0 W (in standby mode)Dimensions (W H D) 435 mm 11

29、5 mm 270 mmMass 6.8 kg(No.MB638)1-7Subwoofer (SP-THD7W)Front speakers (SP-THD7F)Center speaker (SP-THD7C)Surround speakers (SP-THD7S)Type Bass-Reflex TypeSpeaker 20 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 28 Hz to 200 HzSound Pressure Level 75 dB/WmDimensions (W H D) 353.5

30、mm 351 mm 248 mmMass 8.5 kgType 2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 23 cm dome 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 83 dB/WmDimensions (W H D) 280 mm x 1 100 mm x 280 mm (with stand)280 mm x 594 mm

31、 x 280 mm (without stand)Mass 8.9 kg each (with stand)6.5 kg each (without stand)Type 1-Way 2-Speaker Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 2Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 84 dB/WmDimensions (W H D) 435 mm 100

32、mm 118 mmMass 2.2 kgType 1-Way Bass-Reflex Type (Magnetically Shielded Type)Speaker 8 cm cone 1Power Handling Capacity 140 WImpedance 4 Frequency Range 75 Hz to 20 000 HzSound Pressure Level 77 dB/WmDimensions (W H D) 98.5 mm 215 mm 118 mmMass 1.0 kg each1-8 (No.MB638)SECTION 1PRECAUTION1.1 Safety P

33、recautions(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 madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose u

34、sed 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 alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and wi

35、ll further relieve themanufacture of 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

36、 afforded by them necessarily be obtained 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 shadin

37、g 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 replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the pr

38、oducts 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 prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed,

39、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 check on the exposed metal parts of the product (an-tenna terminals, knobs, metal cabinet, screw heads,headphone jack, co

40、ntrol 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 directly into the AC outlet. Using a“Leakage Current Tester“, measure the leakage currentfrom each exposed metal parts of th

41、e 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 check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensiti

42、vityin 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 across the resistor with the ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any expo

43、sed 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 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 d

44、esigned and manufactured tomeet international 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 repla

45、cedby approved parts.(5) If mains voltage 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

46、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 ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts o

47、f 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(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB638)1-91.5 Safety Precautions (U.K only)(1)

48、 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 design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in t

49、he original circuits.(2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannotaccept 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 ne