JVC-RXV7000UF-avr-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MB502 2006/1 AUDIO/VIDEO CONTROL RECEIVER MB50220061 RX-V7000UF Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 5TROUBLESHOOTING . . . . . . . . . . . . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB502) SPECIFICATION * : Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz) Designs and

5、Specifications are subject to change without notice. Amplifier Output Power At Stereo operationFront channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion (IEC268-3/DIN). Front channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with

6、 no more than 0.8% total harmonic distortion. At Surround operationCenter channel100 W, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. Surround channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no more than 0.8% total harmonic distortion. AudioA

7、udio Input Sensitivity/Impedance (1 kHz)TAPE, VCR, TV SOUND/DBS, DVD:220 mV/47 k Audio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 OpticalDIGITAL 2 (VCR), DIGITAL 3 (TV SOUND/DBS):-21 dBm to -15 dBm (660 nm 30 nm) Recording Output LevelTAPE, VCR:220 mV Signal-to-Noise Ratio (66 IHF/DIN)T

8、APE, VCR, TV SOUND/DBS, DVD:96 dB/62 dB Frequency Response (8 )TAPE, VCR, TV SOUND/DBS, DVD:20 Hz to 50 kHz (+1 dB, -3 dB) Bass Boost+4 dB 1 dB at 100 Hz Equalization (5 bands)63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz:8 dB (in 2 dB steps) VideoVideo Input Sensitivity/Impedance Composite video:DVD, VCR, DB

9、S1 V(p-p)/75 S-video:DVD, VCR,DBS(Y: luminance):1 V(p-p)/75 (C: chrominance, burst):0.3 V(p-p)/75 Component:DVD, VCR(Y: luminance):1 V(p-p)/75 (PB, PR):0.7 V(p-p)/75 Video Output LevelComposite video:VCR, MONITOR OUT 1 V(p-p)/75 S-video:VCR, MONITOR OUT(Y: luminance):1 V(p-p)/75 (C: chrominance, bur

10、st)0.3 V(p-p)/75 Component:MONITOR OUT(Y: luminance):1 V(p-p)/75 (PB, PR):0.7 V(p-p)/75 SynchronizationNegative Signal-to-Noise Ratio45 dB FM tuner (IHF) Tuning Range87.50 MHz to 108.00 MHz Usable SensitivityMonaural:12.8 dBf (1.2 V/75 ) 50 dB Quieting SensitivityMonaural:16.0 dBf (1.7 V/75 ) Stereo

11、:37.5 dBf (20.5 V/75 ) Stereo Separation at OUT (REC)35 dB at 1 kHz AM tuner Tuning Range531 kHz to 1 710 kHz (at 9 kHz intervals) 530 kHz to 1 710 kHz (at 10 kHz intervals) General Power RequirementsAC 220 V, 50 Hz Power Consumption200 W (at operation) 0.9 W (in standby mode) Dimensions (W H D)435

12、mm 200 mm 425 mm Mass11.4 kg RadioFans.CN 收音机爱 好者资料库 (No.MB502)1-3 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 origina

13、l design unless authorized in 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 t

14、he product should not be made. 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-

15、related characteristics. These 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

16、are identified in the Parts 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 recommende

17、d replacement parts shown in 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

18、the prevention of electric shock 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

19、 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 product is safe to operate without danger of electrical shock.Do not use a line isolation transformer during this check. Plug

20、the AC line cord directly into 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

21、 AC (r.m.s.). Alternate check 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

22、ground. Measure the AC voltage 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 repea

23、t each measurement. Voltage 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

24、 standards are maintained. (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

25、 may be left over on some parts 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

26、 over with black such as the 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 grou

27、nd Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机爱 好者资料库 1-4 (No.MB502) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB502)1-5 SECTION

28、 3 DISASSEMBLY 3.1Removing the top cover (See Fig.1) (1) From the right and left sides of the main body, remove the four screws A attaching the top cover. (2) From the top side of the main body, remove the six screws A attaching the top cover. (3) From the back side of the main body, remove the six

29、screws B attaching the top cover. (4) Remove the top cover in the direction of the arrow 2 while extending the lower sections of the top cover in the direc- tion of the arrow 1. Fig.1 A A 1 1 2 B A Top cover 1-6 (No.MB502) 3.2Removing the front panel assembly (See Figs.2 and 3) Prior to performing t

30、he following procedure, remove the top cover. (1) From the top side of the main body, disconnect the card wire from the connector CN402 on the front board. (See Fig.2) (2) Disconnect the card wire from the connector CN201 on the power supply board. (See Fig.2) (3) Remove the wire protection board fi

31、xing the card wire. (See Fig.2) (4) Remove the four screws C attaching the front panel as- sembly. (See Fig.2) (5) Remove the four screws D attaching the stay bracket. (See Fig.2) (6) From the bottom side of the main body, remove the four screws E attaching the front panel assembly. (See Fig.3) (7)

32、Remove the front panel assembly in the direction of the ar- row. (See Fig.3) Fig.2 Fig.3 CDD C D C Front panel assembly CN201 Power supply board Wire protection board CN402 Front board Stay bracket E Front panel assembly E (No.MB502)1-7 3.3Removing the rear panel (See Fig.4) Prior to performing the

33、following procedure, remove the top cover and stay bracket. (1) From the back side of the main body, remove the strain re- lief from the rear panel in the direction of the arrow. (2) Remove the thirty screws F attaching the rear panel. Fig.4 3.4Removing the component board and tuner unit (See Figs.5

34、 and 6) Prior to performing the following procedure, remove the top cover and stay bracket. (1) From the top side of the main body, disconnect the parallel wire from the connector CN511 on the S-video board. (See Fig.5) (2) From the back side of the main body, remove the four screws G attaching the

35、component board. (See Fig.6) (3) From the top side of the main body, disconnect the card wire from the connector CN1 on the tuner unit. (See Fig.5) (4) From the back side of the main body, remove the two screws H attaching the tuner unit. (See Fig.6) Fig.5 Fig.6 Rear panel F F Strain relief F CN511

36、S-Video board Component boardTuner CN1 HG Rear panel 1-8 (No.MB502) 3.5Removing the DSP board, audio input board, DVD board and video board (See Fig.7) Prior to performing the following procedure, remove the top cover, stay bracket and rear panel. (1) From the top side of the main body, disconnect t

37、he DSP board from the connector CN481 on the front board. (2) Disconnect the audio input board from the connector CN421 on the front board. (3) Disconnect the DVD board from the connector CN431 on the front board. (4) Disconnect the video board from the connector CN441 on the front board. Fig.7 3.6R

38、emoving the S-video board (See Fig.8) Prior to performing the following procedure, remove the top cover, stay bracket and rear panel. (1) From the top side of the main body, disconnect the parallel wire from the connector CN511 on the S-video board. (2) Disconnect the S-video board from the connecto

39、r CN461 on the front board. Fig.8 CN481 Front boardDVD board Video board CN421 Audio input board DSP board CN431 CN441 Front board CN511 S-Video board CN461 (No.MB502)1-9 3.7Removing the front board (See Fig.9) Prior to performing the following procedure, remove the top cover, rear panel, stay brack

40、et, component video board, DSP board, audio input board, DVD board, video board, S-video board and tuner unit. (1) From the top side of the main body, disconnect the card wire from the connector CN402 on the front board. (2) Disconnect the relay board from the connector CN491 on the front board. (3)

41、 Disconnect the wires from the connectors CN471, CN472 and CN473 on the front board. (4) Remove the three screws J attaching the front board. (5) Loosen the screw K attaching the front board. Fig.9 3.8Removing the speaker terminal board (See Fig.10) Prior to performing the following procedure, remov

42、e the top cover, stay bracket, component board and rear panel. (1) From the top side of the main body, remove the solders from the soldered sections a on the speaker terminal board. Fig.10 Front board CN472CN491 Reray board CN402 CN473 CN471 J K J Soldered sections a Speaker terminal board 1-10 (No.

43、MB502) 3.9Removing the main board (See Fig.11) Prior to performing the following procedure, remove the top cover and stay bracket. (1) From the top side of the main body, remove the solders from the soldered section b on the speaker terminal board attaching the parallel wires. (2) Disconnect the rel

44、ay board from the connectors CN291 and CN491 on the power supply board and front board. (3) Disconnect the parallel wire from the connector CN241 on the power supply board. (4) Disconnect the wire from the connector CN251 on the pow- er transformer board 1. (5) Disconnect the wires from the connecto

45、rs CN471, CN472 and CN473 on the front board. (6) Remove the screw M, two screws N and four screws P at- taching the main board. Fig.11 3.10 Removing the heat sink (See Figs.12 and 13) Prior to performing the following procedure, remove the top cover, stay bracket and main board. (1) Remove the ten

46、screws Q attaching the heat sink of the main board. (See Fig.12) (2) From the reverse side of the main board, remove the two screws R attaching the heat sink. (See Fig.13) Fig.12 Fig.13 N P Soldered section b Power transformer board 1 CN241 Power supply board Wire protection board CN251 Speaker term

47、inal board CN491 CN291 CN472 CN471 CN473 Front board Relay board P P N M Main board Q Q Heat sink Main board Heat sink Main board RR (No.MB502)1-11 3.11 Removing the center amp. board, front amp. boards (L/R) and rear amp. boards (L/R) (See Figs.12 and 14) Prior to performing the following procedure

48、, remove the top cover, stay bracket and main board. (1) Remove the ten screws Q attaching the heat sink of the main board. (See Fig.12) (2) Disconnect the center amp. board from the connector CN321 on the main board. (See Fig.14) (3) Disconnect the front amp. board (L) from the connector CN311 on t

49、he main board. (See Fig.14) (4) Disconnect the front amp. board (R) from the connector CN312 on the main board. (See Fig.14) (5) Disconnect the rear amp. board (L) from the connector CN331 on the main board. (See Fig.14) (6) Disconnect the rear amp. board (R) from the connector CN332 on the main board. (See Fig.14) Fig.14 3.12 Removing the power transformer (See Fig.15) Prior to performing the following procedure, remove the top cover and stay bracket. (1) From the top side of the main body, remove the solders from the soldered section c on the powe