JVC-THD7-ddcs-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2007 Victor Company of Japan, Limited No.MB638 2007/9 DVD DIGITAL CINEMA SYSTEM MB63820079 SERVICE MANUAL TH-D7B, TH-D7E, TH-D7EN, TH-D7EV, TH-D7A, TH-D7US, TH-D7UX, TH-D7UG COPYRIGHT 2007 Victor Company of Japan, Limited Lead free solder used in the board (material : Sn-Ag-

2、Cu, melting point : 219 Centigrade) Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

3、 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

4、4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5、. . . 1-29 XV-THD7 B,E,EN,EV only SP-THD7W SP-THD7F SP-THD7C SP-THD7S RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB638) SPECIFICATION B,E,EN,EV Center 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

6、 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 RMS at 4 at 100 Hz with 10 % total harmonic distortion. Audio sectionDigital Inpu

7、t*1 DIGITAL INOPTICAL-21 dBm to -15 dBm (660 nm 30 nm) COAXIAL0.5V(p-p)/75 Video sectionVideo SystemPAL Horizontal Resolution500 lines Signal-to-Noise Ratio (Composite signal when “RGB” is selected)54 dB Video Output Level(AV-Scart)Composite video 1.0 V(p-p)/75 Y C 1.0 V(p-p)/75 0.3 V(p-p)/75 RGB0.7

8、 V(p-p)/75 (VIDEO OUT) Component(Y): 1.0 V(p-p)/75 (PB/PR): 0.7V(p-p)/75 Video 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/1080i USB storageUSB Spe

9、cificationCompatible with USB 2.0 Full Speed Compatible DeviceMass Storage Class Compatible File SystemFAT16, FAT32 Bus Power SupplyMax. 500 mA Tuner sectionTuner RangeFM87.50 MHz to 108.00 MHz AM (MW)522 kHz to 1 629 kHz GeneralPower RequirementsAC 230 V , 50 Hz Power Consumption160 W (during opera

10、tion) 1.0 W (in standby mode) Dimensions (W H D)435 mm 115 mm 270 mm Mass6.8 kg RadioFans.CN 收音机爱 好者资料库 (No.MB638)1-3 Subwoofer (SP-THD7W) Front speakers (SP-THD7F) Center speaker (SP-THD7C) Surround speakers (SP-THD7S) TypeBass-Reflex Type Speaker20 cm cone 1 Power Handling Capacity140 W Impedance4

11、 Frequency Range28 Hz to 200 Hz Sound Pressure Level75 dB/Wm Dimensions (W H D)353.5 mm 351 mm 248 mm Mass8.5 kg Type2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone x 2 3 cm dome x 1 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Pressu

12、re Level83 dB/Wm Dimensions (W x H x 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 cone 2 Power Handling Capacity140 W Impedance

13、4 Frequency Range75 Hz to 20 000 Hz Sound Pressure Level84 dB/Wm Dimensions (W H D)435 mm 100 mm 118 mm Mass2.2 kg Type1-Way Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone 1 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Pressure Level77 dB/Wm Dimensi

14、ons (W H D)98.5 mm 215 mm 118 mm Mass1.0 kg each RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB638) A Center unit * 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 % total harmonic

15、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* DIGITAL INOPTICAL-21 dBm to -15 dBm (660

16、nm 30 nm) COAXIAL0.5 V(p-p)/75 Analog inputVIDEO 2 AUDIO IN Video sectionVideo SystemPAL/NTSC Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video 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 C

17、omponent-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: 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/1080i For NTSC480p/720p/1080i USB sto

18、rageUSB SpecificationCompatible with USB 2.0 Full Speed Compatible DeviceMass Storage Class Compatible File SystemFAT16, FAT32 Bus Power SupplyMax. 500 mA Tuner sectionTuner RangeFM87.50 MHz to 108.00 MHz AMAt 10 kHz intervals: 530 kHz to 1 710 kHz At 9 kHz intervals: 531 kHz to 1 710 kHz GeneralPow

19、er RequirementsAC 240 V , 50 Hz Power Consumption160 W (during operation) 4.0 W (in standby mode) Dimensions (W H D)435 mm 115 mm 270 mm Mass6.8 kg (No.MB638)1-5 Subwoofer Front speakers (SP-THD7F) Center speaker (SP-THD7C) Surround speakers (SP-THD7S) TypeBass-Reflex Type Speaker20 cm cone 1 Power

20、Handling Capacity140 W Impedance4 Frequency Range28 Hz to 200 Hz Sound Pressure Level75 dB/Wm Dimensions (W H D)353.5 mm 351 mm 248 mm Mass8.5 kg Type2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone 2 3 cm dome 1 Power Handling Capacity140 W Impedance4 Frequency Range75

21、 Hz to 20 000 Hz Sound Pressure Level83 dB/Wm Dimensions (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 cone 2 Power Handlin

22、g Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Pressure Level84 dB/Wm Dimensions (W H D)435 mm 100 mm 118 mm Mass2.2 kg Type1-Way Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone 1 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Press

23、ure Level77 dB/Wm Dimensions (W H D)98.5 mm 215 mm 118 mm Mass1.0 kg each 1-6 (No.MB638) US,UX,UG Center 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 % total

24、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 to -15

25、 dBm (660 nm 30 nm) COAXIAL0.5V(p-p)/75 Analog inputVIDEO 2 AUDIO IN Analog outputAUDIO OUT Video sectionVideo SystemPAL/NTSC Horizontal Resolution500 lines Signal-to-Noise Ratio64 dB Video 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-

26、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: 0.286 V(p-p)/75 HDMIHDMI Input (VIDEO 1 IN)PASS THROUGH (up to 225 MHz) HDMI Output (MONITOR OUT)For PAL5

27、76p/720p/1080i For NTSC480p/720p/1080i USB storageUSB SpecificationCompatible with USB 2.0 Full Speed Compatible DeviceMass Storage Class Compatible File SystemFAT16, FAT32 Bus Power SupplyMax. 500 mA Tuner sectionTuner RangeFM87.50 MHz to 108.00 MHz AM (At 10 kHz intervals) For Saudi Arabia: 530 kH

28、z to 1 600 kHz For the other countries: 530 kHz to 1 710 kHz AM (At 9 kHz intervals)For Saudi Arabia: 531 kHz to 1 602 kHz For the other countries: 531 kHz to 1 710 kHz GeneralPower RequirementsAC 110 V/127 V/220 V - 240 V 50/60 Hz (selectable with the voltage selector) Power Consumption160 W (durin

29、g operation) 4.0 W (in standby mode) Dimensions (W H D)435 mm 115 mm 270 mm Mass6.8 kg (No.MB638)1-7 Subwoofer (SP-THD7W) Front speakers (SP-THD7F) Center speaker (SP-THD7C) Surround speakers (SP-THD7S) TypeBass-Reflex Type Speaker20 cm cone 1 Power Handling Capacity140 W Impedance4 Frequency Range2

30、8 Hz to 200 Hz Sound Pressure Level75 dB/Wm Dimensions (W H D)353.5 mm 351 mm 248 mm Mass8.5 kg Type2-Way 3-Speaker Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone 2 3 cm dome 1 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Pressure Level83 dB/Wm Dime

31、nsions (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 cone 2 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to

32、 20 000 Hz Sound Pressure Level84 dB/Wm Dimensions (W H D)435 mm 100 mm 118 mm Mass2.2 kg Type1-Way Bass-Reflex Type (Magnetically Shielded Type) Speaker8 cm cone 1 Power Handling Capacity140 W Impedance4 Frequency Range75 Hz to 20 000 Hz Sound Pressure Level77 dB/Wm Dimensions (W H D)98.5 mm 215 mm

33、 118 mm Mass1.0 kg each 1-8 (No.MB638) SECTION 1 PRECAUTION 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 i

34、n writing by the manufacturer. Replacement parts must be 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 mad

35、e. Any design alterations or additions will void the manufacturers 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. The

36、se characteris- tics are often not evident from visual inspection 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

37、List of Ser- vice Manual. Electrical components having such 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

38、 the Parts List of Service Manual may create shock, fire, 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 s

39、hock and fire hazard. When service is required, the original 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

40、 exposed metal parts of the product (an- tenna terminals, 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 in

41、to the AC outlet. Using a Leakage Current Tester, measure 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 chec

42、k method Plug the AC line cord directly into the AC outlet. 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 volta

43、ge across the resistor with the AC voltmeter. Move the resistor 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

44、measured any must not exceed 0.75 V AC (r.m.s.). This corresponds 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. (

45、3) Repairs must be made in accordance with the relevant safety 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 pa

46、rts of the chassis. Therefore, pay attention to such burrs 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

47、 resistor ( ), diode ( ) and ICP ( ) or identified by the 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

48、exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE (No.MB638)1-9 1.5 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,

49、 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 the original circuits. (2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannot accept responsibility for personal injury or property damage resulting therefrom. (3) Essential safety critical components are identified by ( ) on the Part