JVC-AXV8000-int-sm维修电路原理图.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MB177 2004/3 AUDIO/VIDEO CONTROL AMPLIFIER MB17720043 AX-V8000 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

3、 . . 1-4 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . . . . 1-20 Area suffix UP - Korea AUDIO/VIDEO CONTROL AMPLIFIER ST ANDB Y/ON ST ANDBY PHONES DIMMER CC CONVER DOOR UP DOOR DOWN MASTER VOLUME S-VIDEODIGITALVIDEOLAUDIOR VIDEO CHANNEL TV/VIDEO MUTING DVD ON/OFFON/OFF STANDBY/ONSTANDBY/ON STANDBY TV/CATV/DBSVCR 1 ON DVD MULTICD CDR PHONO TAPE

5、/MD EXT 7.1CH ANALOG/DIGITAL CC CONVERTER EFFECT LIVENESS SOUND TEST THX EX/ES/7.1ANALOG DIRECT SLEEPDIMMER FM MODE DSPSURR/DSPSURROUND RETURN100+ OFF INPUT SET SETUP MENU ADJUST MENU DVD MENU EXIT TEXT DISPLAY 123 456 7/P89 10 +10 0 TV VOL VOLUME TUNING STOPPAUSE LIGHT FF/ / REW REC PLAY DOWNUP RM-

6、SRXDP20JREMOTE CONTROL A/V CONTROL RECEIVER VCR 1VCR 2 FM/AMVIDEOTV/DBS ZONE 2 TRANSMITLEARN ZONE 1 ZONE 2ZONE 1 ZONE 2LEARNZONE 1 TV CATV/ DBS RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB177) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuit

7、s and components specially for safety purpos- es. For continued protection, no changes should be made to the original 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 perso

8、nnel only. (2) Alterations of the design or circuitry of the product should not be made. Any design alterations of the 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 o

9、r property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-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 com

10、ponents rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics 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

11、 Manual. The use of a substitute replacement which does not have the same safety charac- teristics as the recommended 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,

12、 barriers and the like to be separated from live parts, high temperature parts, moving parts and/or sharp edges for 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 retur

13、ned to normal, after reassem- bling. (5) Leakage shock hazard testing After 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 product is

14、 safe to operate without danger of electrical shock.Do not use 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 current from each exposed metal parts of the cabinet, particular- ly any exposed metal

15、 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 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

16、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 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 p

17、ath to the chassis, and measure the AC voltage across the resistor. Now, reverse the plug in the AC outlet and repeat 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

18、 meet international safety standards. (2) It is the legal responsibility of the repairer to ensure that these safety 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

19、. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding 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 co

20、mponent 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 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 typ

21、e 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 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 (No.MB177)1-3 SECTION 2 SPECI

22、FIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-4 (No.MB177) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the top cover (See Fig.1) (1) From the top sides of the main body, remove the nine screws A attaching the top cover. (2) From the back

23、 side of the main body, remove the three screws B attaching the top cover. (3) Take out the top cover upward in the direction of the arrow. 3.1.2Removing the side panel (L) & side panel (R) & stay bkt (See Figs.1 and 2) Prior to performing the following procedure, remove the top cover. (1) From the

24、left sides of the main body, remove the four screws C attaching the side panel (L). (See fig.1) (2) From the right sides of the main body, remove the three screws C attaching the side panel (R). (See fig.1) (3) From the top side of the main body, remove the four screws D attaching the side panel (L)

25、 and the side panel (R). (See fig.2) (4) Remove the four screws E attaching the stay bkt, and take out the stay bkt. (See fig.2) Fig.1 Fig.2 Top cover C C C B Side panel (R)Side panel (L) A E E DD Side panel(L) Stay bkt Side panel(R) E (No.MB177)1-5 3.1.3Removing the front panel assembly (See Figs.3

26、 to 6) Prior to performing the following procedure, remove the top cover, side panels and stay bkt. (1) From the top side of the main body, cut off the tie band fixing the wire. (See fig.3) (2) Remove the three screws F attaching the front panel assembly. (See fig.3) (3) Remove the screw G attaching

27、 the lug wire. (See fig.3) (4) From the bottom side of the main body, remove the four screws H attaching the front panel assembly and take out the front panel assembly forward. (See fig.4) (5) From the front side of the main body, disconnect the wire from the connectors CN971, CN977, CN983 and CN985

28、 on the system control board. (See fig.5) (6) From the reverse side of the front panel assembly, disconnect the wire from the connector CN973 on the front AV in board. (See fig.6) (7) Disconnect the wire from the connector CN373 on the front DIGITAL in board. (See fig.6) Reference: When attaching th

29、e screws F and screw G, attach the lug wire with it. Fig.3 Fig.4 Fig.5 Fig.6 F (fixing the lug wire) G Tie band Front panel assembly H Front panel assembly System control board CN985 CN971CN977CN983 CN973 Front AV in board CN373 Front DIGITAL in board 1-6 (No.MB177) 3.1.4Removing the rear panel (See

30、 Fig.7) Prior to performing the following procedure, remove the top cover, side panels and stay bkt. (1) From the top side on the main body, remove the protect cover and the solders from the two solder points on the AC inlet. (2) From the bottom side on the main body, remove the four screws J attach

31、ing the rear panel. (3) From the back side on the main body, remove the forty-six screws K, two screws L and three screws M attaching each board to the rear panel. 3.1.5Removing the audio signal 3 board & compu link board (See Figs.7 and 8) Prior to performing the following procedure, remove the top

32、 cover, side panels and stay bkt. (1) From the top side of the main body, cut off the tie band fixing the wire. (See fig.8) (2) Disconnect the wire from the connector CN201 on the audio signal 1 board. (See fig.8) (3) From the back side of the main body, remove the two screws L attaching the audio s

33、ignal 3 board to the rear panel. (See fig.7) (4) From the top side of the main body, disconnect the wire from the connector CN302 on the compu link board. (See fig.8) (5) Disconnect the wire from the connector CN207 on the audio signal 1 board. (See fig.8) (6) From the back side of the main body, re

34、move the three screws M attaching the compu link board to the rear panel. (See fig.7) Fig.7 Fig.8 3.1.6Removing the Y/C separator board (See Fig.9) Prior to performing the following procedure, remove the top cover, side panels and stay bkt. (1) From the top side of the main body, cut off the tie ban

35、d fixing the wire. (2) Disconnect the connectors CN481 and CN482 on the Y/C separator board, and take out the Y/C separator board upward. Fig.9 J KK AC inlet Black Red Solder part K JJK K Protect cover LK Rear panel KKKM Tie bands Audio signal 3 board CN201 Audio signal 1 board Compu link board CN20

36、7 CN302 Y/C separator board CN481 CN482 Tie bands (No.MB177)1-7 3.1.7Removing the system control board (See Figs.10 and 11) Prior to performing the following procedure, remove the top cover, side panels, stay bkt and front panel assembly. (1) From the top side of the main body, cut off the tie bands

37、 fixing the wires. (See fig.10) (2) Disconnect the wire from the connector CN45 on the power 2 board . (See fig.10) (3) Disconnect the wire from the connector CN25 on the power/ fuse board. (See fig.10) (4) Disconnect the wire from the connector CN234, CN208 on the audio signal 1 board. (See fig.10)

38、 (5) From the front side of the main body, disconnect the wires from the connector CN963, CN964 and CN981 on the system control board. (See fig.11) (6) Remove the three plastic rivet, and take out the system control board. (See fig.11) Fig.10 Fig.11 3.1.8Removing the DSP 1 board & DSP 2 board & shie

39、ld cover (See Fig.12) Prior to performing the following procedure, remove the top cover, side panels, stay bkt, front panel assembly and rear panel. (1) From the top side of the main body, disconnect the connector CN631 on the DSP 2 board. (2) Disconnect the connector CN203 on the audio signal 1 boa

40、rd, and cut off the tie bands fixing the wire. (3) Remove the two plastic rivet, and disconnect the connector CN633, CN643 on the DSP 2 board, and disconnect CN635 on the DSP 1 board. (4) Remove the screw N attaching the barrier to the shield cover, and take out the shield cover. Fig.12 CN25 CN234 C

41、N208 CN45 Power/ fuse boardAudio signal 1 board Tie bands Tie bands Power 2 board System control boardPlastic rivetPlastic rivet CN963 CN981 CN964 Shield cover (Top view) CN631 CN635CN643Plastic rivet DSP 2 board N CN203 CN633 Audio signal 1 board DSP 1 board Barrier 1-8 (No.MB177) 3.1.9Removing the

42、 audio signal 1 board (See Fig.13) Prior to performing the following procedure, remove the top cover, side panels, stay bkt, front panel assembly and rear panel, DSP 1 board, DSP 2 board and shield cover. (1) From the top side of the main body, disconnect the wires from the connectors CN202, CN204,

43、CN234, CN224, CN208, CN218 and CN223 on the audio signal 1 board. (2) Remove the plastic rivet, and disconnect the connectors CN205, CN221 and CN206 on the audio signal 1 board. (3) Take out the audio signal 1 board. Fig.13 3.1.10 Removing the audio signal 2 board & video board & S video board & com

44、ponent video board & D5 video board (See Figs.14 and 15) Prior to performing the following procedure, remove the top cover, rear panel, front panel assembly, Y/C separator board, DSP 1 board, DSP 2 board, shield cover and audio signal 1 board. (1) From the top side of the main body, disconnect the w

45、ire from the connector CN324 on the audio signal 2 board. (See fig.14) (2) Disconnect the audio signal 2 board from the connector CN15 and CN6 on the main board. (See fig.15) (3) Disconnect the video board from the connector CN7 on the main board. (See figs.14 and 15) (4) Disconnect the S video boar

46、d from the connector CN8 on the main board. (See figs.14 and 15) (5) Disconnect the wire from the connector CN502 on the component video board. (See fig.14) (6) Disconnect the component video board from the connector CN9 on the main board. (See fig.15) (7) Disconnect the D5 video from the connector

47、CN10 on the main board. (See figs.14 and 15) Fig.14 Fig.15 Plastic rivet CN204 CN202Audio signal 1 board CN205 CN221 CN206 CN234 CN224 CN208CN223 CN218 Video boardComponent video board Audio signal 2 board S video board CN324 Main board D5 video board CN502 Main board CN15 CN6 CN7 CN8 CN9 CN10 (No.M

48、B177)1-9 3.1.11 Removing the main board (See Figs.16 and 17) Prior to performing the following procedure, remove the top cover, rear panel, front panel assembly, Y/C separator board, DSP 1 board, DSP 2 board, shield cover, audio signal 1 board, audio signal 2 board, video board, S video board, compo

49、nent video board and D5 video board. (1) From the top side of the main body, cut off the tie bands fixing the wire. (See fig.16) (2) Disconnect the wire from the connector CN62 on the regulator board. (See fig.16) (3) Disconnect the wire from the CN44 on the power 2 board . (See fig.16) (4) Disconnect the wire from the connector CN743 on the speaker relay board. (See fig.17) (5) Disconnect the card wire from the connector CN1, CN2 and the wire from the connector CN11 on the main board. (See fig.16) (6) Remove the seven screws P att