Jvc-KWAVX-701-UN-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.MA261 2006/4 DVD RECEIVER WITH MONITOR MA26120064 KW-AVX700E,KW-AVX700U, KW-AVX700UN,KW-AVX700A, KW-AVX701UN,KW-AVX706J, KW-AVX706U,KW-AVX706UN, KW-AVX706E,KW-AVX706EU, KW-AVX706EE Lead free solder used in the board (material : Sn-Ag-

2、Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA261) SPECIFICATION AMPLIFIER Power Output

5、 (for northern america)20 W RMS 4 Channels at 4 and or = 1% THD+N Maximum Power Output (except northern america) Front/Rear50 W per channel Continuous Power Output (RMS) (except northern america) Front/Rear20 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total har- monic distortion

6、Signal to Noise RatioFor northern america80 dBA (reference: 1 W into 4 ) Except northern america70 dB Load Impedance4 (4 to 8 allowance) Equalizer Control RangeFrequencies60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.5 kHz, 6.3 kHz, 15 kHz Level10 dB Audio Output Level (F-OUT/R-OUT/CENTER/SUBWOOFER) Line-Out Leve

7、l/Impedance2.5 V/20 k load (full scale) Output Impedance1 k Color SystemNTSC (for northern america) PAL (for europe and australia) PAL/NTSC (for asisa) Video Output (composite)1 Vp-p/75 Other TerminalsInputLINE IN, VIDEO IN, Antenna input Output2nd AUDIO OUT OthersCD changer, AV BUS FM/AM TUNER Freq

8、uency RangeFM (for northern america)87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz) 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz) Fm (ecxept northern america)87.5 MHz to 108.0 MHz AM (for northern america)530 kHz to 1 710 kHz (with channel interval set to 10 kHz

9、) 531 kHz to 1 602 kHz (with channel interval set to 9 kHz) AM (for europe and australia)(MW) 522 kHz to 1 620 kHz (LW) 144 kHz to 279 kHz AM (for asia)531 kHz to 1 602 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 ) Alternate Channel Selectivity (40

10、0 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation35 dB AM Tuner (for northern america)Sensitivity/Selectivity20 V/35 dB MW Tuner (for europe and australia)Sensitivity/Selectivity20 V/35 dB LW Tuner (for europe and australia)Sensitivity50 V AM Tuner (for asia)Sensitivity/Selectivity

11、:20 V/35 dB DVD/CD Signal Detection SystemNon-contact optical pickup (semiconductor laser) Frequency ResponseDVD, fs=48 kHz16 Hz to 22 000 Hz DVD, fs=96 kHz16 Hz to 44 000 Hz VCD/CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit RadioFans.CN

12、 收音机爱 好者资料库 (No.MA261)1-3 Design and specifications are subject to change without notice. MONITOR Screen Size6.5 inch wide liquid crystal display Number of Pixel280 800 pixels: 400 (horizontal) 3 234 (vertical) Drive MethodTFT (Thin Film Transistor) active matrix format Color SystemNTSC (for norther

13、n america) PAL/NTSC (except northern america) Aspect Ratio16:9 (wide) Allowable Storage Temperature-10C to +60C (14F to 140F) Allowable Operating Temperature0C to +40C (32F to 104F) GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable

14、 Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D)Installation Size (approx.)178 mm 100 mm 160 mm (7-1/16 3-15/16 6-5/16) Panel Size (approx.)170 mm 93 mm 29 mm (6-3/4 3-11/16 1-3/16) Mass (approx.)2.6 kg (5.8 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA261) SECTION

15、 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or o

16、peration check. (No.MA261)1-5 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.2

17、.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by

18、laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain q

19、uality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pic

20、kup. The testers internal power source can easily destroy the laser diode. 1.3Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc.

21、 after replacing the optical pickup. For specific details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break w

22、hen subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the pickup unit. Apply solder to the short land before the flexible

23、wire is disconnected from the connector on the pickup unit. (If the flexible wire is disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wr

24、ist strap Conductive material (conductive sheet) or iron plate Mechanism control board CN101 Flexible wire Short-circuit points 1-6 (No.MA261) 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposu

25、re to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 4.CAUTION : The CD,MD and DVD player uses invisible laser radiation and is equipped with safety switches which prevent emission of radi

26、ation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specif

27、ied here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check. WARNING LABEL CAUTION : Visible and Invisible laser radiation when open and interlock failed o

28、r defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itse

29、esi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PRODUCT (No.MA261)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MA261) S

30、ECTION 3 DISASSEMBLY 3.1Main body 3.1.1Removing the front panel assembly (See Fig.1 to 4) (1) From the bottom side of main body, insert the screw-driver to hole of the third gear from hole a of the bottom chassis, and then turn the gear to clockwise until front panel assem- bly comes up. (See Fig.1)

31、 (2) Remove the two screws A attaching the front panel assem- bly. (See Fig.2) (3) Remove the four screws B attaching the front panel as- sembly. (See Fig.2) (4) Disengage the front panel assembly from hook b and re- move the front panel assembly. (See Fig.2) (5) Remove the two screws C attaching th

32、e front panel assem- bly. (See Fig.3) (6) Disconnect the connector wire from connector CN374 of the connection board and then take out the front panel as- sembly. (See Fig.4) Fig.1 Fig.2 Fig.3 Fig.4 a A B B (both side) CC CN374 (No.MA261)1-9 3.1.2Removing the bottom chassis assembly (See Fig.5 to 8)

33、 (1) Remove the four screws D and two screws E attaching the heat sink. (See Fig.5) (2) Remove the two screws F attaching the bottom chassis as- sembly. (See Fig.6) (3) Remove the two screws G attaching the bottom chassis as- sembly. (See Fig.7) (4) Remove the three screws H and one screw J attachin

34、g the rear bracket. (See Fig.8) Fig.5 Fig.6 Fig.7 Fig.8 CC D F F G HJHJ 1-10 (No.MA261) 3.1.3Removing the rear bracket (See Fig.9 and 10) (1) Remove the two screws K and one screw L attaching the rear heat sink. (See Fig.9) (2) Remove the eight screws M, two screws N and one screw P attaching the re

35、ar bracket. (See Fig.9) (3) Disconnect the connector wire from fan motor connected to CN681 of the sub board. (See Fig.10) Fig.9 Fig.10 KMMM MNN P MMM M K L CN681 (No.MA261)1-11 3.1.4Removing the main section (See Fig.11 to 13) (1) Disconnect the connector wire from connector CN302 of connection boa

36、rd. (See Fig.11) (2) Disconnect the card wire from connector CN702 of main board. (See Fig.12) (3) Remove the four screws Q attaching the main section. (See Fig.13) Fig.11 Fig.12 Fig.13 CN302 CN702 Q QQ Q 1-12 (No.MA261) 3.1.5Removing the main board (See Fig.14) (1) Disconnect the card wire from con

37、nector CN703 of the main board. (2) Remove the four screws R attaching the main board. Fig.14 3.1.6Removing the sub board (See Fig.15) (1) Remove the four screws S attaching the sub board. Fig.15 3.1.7Removing the DVD mechanism assembly (See Fig.16) (1) Remove the three screws T attaching the DVD me

38、chanism assembly. Fig.16 R R R R S S S S T T T (No.MA261)1-13 3.1.8Removing the connection board (See Fig.17) (1) Remove the insulator from DVD mechanism assembly. (2) Disconnect the card wires from connector CN301 and CN303 of the connection board. (3) Remove the four screws U attaching the connect

39、ion board. Fig.17 3.1.9Removing the monitor assembly (See Fig. 18 and 19) (1) Remove the ten screws V attaching the sub connect board. (See Fig.18) (2) Disconnect the flexible wire from connector CN371 of the sub connect board. (See Fig.19) Caution: In this time, DISC EJECT button come off to easy,

40、do not lost it. Fig.18 Fig.19 CN301 CN303 U U U U V V CN371 1-14 (No.MA261) 3.2Monitor section 3.2.1Removing the front bracket (See Fig.20) (1) Remove the two screws W attaching the FPC cover. (2) Remove the four screws X and four screws Y attaching the front bracket assembly. (3) Disengage the four

41、 hooks b and remove the front bracket assembly. Caution: In this time, FPC cover come off to easy, do not lost it. Fig.20 3.2.2Removing the display unit (See Fig.21) (1) Disconnect the card wires from connector CN422 and CN423 of the panel board. (2) From both side of the display unit, remove the fo

42、ur screws Z attaching the display unit. (3) Disengage the six hooks c and remove the display unit. Fig.21 3.2.3Removing the panel board (See Fig.22) (1) Disconnect the flexible wire from connector CN411 of the panel board. (2) Disconnect the connector wire from connector CN471 of the panel board. (3

43、) Remove the one screw AA attaching the earth wire. (4) Flat to two bending part d of the panel bracket and then re- move the panel board. Fig.22 X X Y Y Y Y W bb b CN423CN422 c c ZZ CN411CN471 d AA (No.MA261)1-15 3.2.4Removing the switch board (See Fig.23) (1) Remove the nine screws BB attaching th

44、e switch board. Fig.23 BBBB 1-16 (No.MA261) 3.3DVD mechanism assembly 3.3.1Removing the mechanism control board (See Fig.1) Caution: Before disconnecting the flexible wire extending from the DVD pickup, solder the short-circuit point on the flexible wire using a grounding soldering iron. If you do n

45、ot follow this instruction, the DVD pickup may be damaged. (1) Turn over the body, and solder the short-circuit points on the flexible wire extending from the DVD pickup. (2) Disconnect the flexible wire from connector CN101 on the mechanism control board. (3) Disconnect the card wire from connector

46、 CN201 on the mechanism control board. (4) Disconnect the flexible wire from connector CN202 on the mechanism control board. (5) Unsolder two soldered points a on the mechanism control board and remove the wire extending from the feed motor. (6) Remove the screw A attaching the lug wire. (7) Remove

47、the two screws B and screw C attaching the mechanism control board. Caution: As the flexible wire to be connected to CN101, make sure to attach it to the mechanism control board using a double tape. After reassembling, unsolder the short-circuit points. Fig.1 Double tape Feed motor Mechanism control

48、 board CN202 CN101 B a C B CN201 Flexible wire Short-circuit points A Lug wire (No.MA261)1-17 3.3.2Removing the top cover (See Fig.2) (1) Remove the two screws D attaching the top cover on the back of the body. (2) Remove the top cover upward. Reference: When reassembling, set part b of the top cove

49、r under the bending part c of the chassis frame. 3.3.3Removing the mechanism section (See Fig.2 to 4) Remove the top cover. (1) From the bottom of the body, remove the screw E attaching the lug wire. (See Fig.2.) (2) Remove the two screws F attaching the right and left stop- pers on the front side. (See Fig.2.) (3) Remove the two floating springs on the bottom of the body. (See Fig.3.) (4) Move the mechanism section upward and remove from the chassis frame. The three damper springs come off from the