Jvc-KDAVX-2-U-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.MA254 2006/4 DVD/CD RECEIVER MA25420064 KD-AVX2J,KD-AVX2E,KD-AVX2EU, KD-AVX2EE,KD-AVX2U,KD-AVX2UN, KD-AVX2A Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

4、5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33 A RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA254) SPECIFICATION AUDIO AMPLIFIER SECTION Power OutputOnly the United States20 W RMS 4 Channels at 4 and or = 1

5、% THD+N Signal to Noise RatioOnly the United States80 dBA (reference: 1 W into 4 ) In countries other than the United States70 dB Maximum Power OutputIn other countriesFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) In other countriesFront20 W per channel into 4 , 40 Hz to 2

6、0 000 Hz at no more than 0.8% total harmonic distortion. Rear20 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. 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 Line-In Lev

7、el/Impedance1.5 V/20 k load Line-Out Level/ImpedanceOnly the United States and Southern Europe 2.5 V/20 k load (full scale) In other countries2.5 V/20 k load (full scale) Output ImpedanceOnly the United States and Southern Europe 1 k In other countries2.5 V/20 k load (full scale) Subwoofer-Out Level

8、/ Impedance Only the United States and Southern Europe 2.0 V/20 k load (full scale) In other countries2.5 V/20 k load (full scale) Color SystemOnly the United StatesNTSC In EuropePAL In other countriesNTSC/PAL Video Input (composite)1 Vp-p/75 Video Output (composite)1 Vp-p/75 Other TerminalsOnly the

9、 United States and Europe2nd AUDIO OUT, CD changer, Steering wheel remote input (OE RE- MOTE) In other countries2nd AUDIO OUT, CD changer TUNER SECTION Frequency RangeFMOnly the United States87.5 MHz to 107.9 MHz (with channel interval set to 100 kHz or 200 kHz) Only the United States87.5 MHz to 108

10、.0 MHz (with channel interval set to 50 kHz) In other countries87.5 MHz to 108.0 MHz AMOnly the United States530 kHz to 1 710 kHz (with channel interval set to 10 kHz) Only the United States531 kHz to 1 602 kHz (with channel interval set to 9 kHz) In Europe(MW) 522 kHz to 1 620 kHz In Europe(LW) 144

11、 kHz to 279 kHz In other countries531 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 (400 kHz)65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation35 dB Capture Ratio1.5 dB AM Tuner ( In other countr

12、ies ) Sensitivity20 V Selectivity35 dB MW Tuner ( In Europe )Sensitivity20 V Selectivity35 dB LW Tuner ( In Europe )Sensitivity50 V RadioFans.CN 收音机爱 好者资料库 (No.MA254)1-3 Design and specifications are subject to change without notice. DVD/CD PLAYER SECTION Signal Detection SystemNon-contact optical p

13、ickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency ResponseDVD fs=48 kHz16 Hz to 22 000 Hz DVD fs=192 kHz16 Hz to 88 000 Hz VCD, CD16 Hz to 20 000 Hz Dynamic Range93 dB Signal-to-Noise Ratio95 dB Wow and FlutterLess than measurable limit MP3Max. Bit Rate320 kbps WMAMax. Bit

14、Rate320 kbps MONITOR SECTION Screen3.5-inch wide liquid crystal panel Number of Pixels224 640 pixels Drive MethodTFT (Thin Film Transistor) active matrix format Color systemOnly the United StatesNTSC In EuropePAL In other countriesNTSC/PAL GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to

15、 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D) Installation Size (approx.)182 mm 52 mm 160 mm (7-3/16 2-1/16 6-5/16) Panel Size (approx.)188 mm 58 mm 12 mm (7-7/16 2-5/16 1/2) Mass (approx.)1.9 kg (4.2 lbs) (excluding acces

16、sories) RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA254) SECTION 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 b

17、eam directly or touch it in case of an adjustment or operation check. (No.MA254)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).

18、Take care to prevent this when performing repairs. 1.2.1 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 perfor

19、med. (1) Ground the workbench Ground the workbench by 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.

20、(3) Handling the optical pickup In order to maintain quality 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 che

21、ck the condition of the laser diode in the optical pickup. 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

22、shorted part of the flexible cable using nippers, etc. 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)

23、 Handle the flexible cable carefully as it may break when 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 uni

24、t. Apply solder to the short land before the flexible 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 con

25、necting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate Mechanism control board CN101 Flexible wire Short-circuit points 1-6 (No.MA254) 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2.DANGER : Invisible laser radiation when open

26、and inter lock failed or defeated. Avoid direct exposure 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 equipp

27、ed with safety switches which prevent emission of radiation 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, adjustment

28、s or performance of procedures other than those specified 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 Invi

29、sible laser radiation when open and interlock failed or 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 nkymttmll

30、e lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PRODUCT (No.MA254)1-7 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not de

31、scribe SPECIFIC SERVICE INSTRUCTIONS. 1-8 (No.MA254) SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the panel assembly (See Fig.1) (1) Push the button(detach) in the lower right part of the panel assembly. (2) Remove the panel assembly. Fig.1 3.1.2Removing the side heat sink (See Fig.2) Re

32、ference: Remove the panel assembly as required. (1) From the left side of the main body, remove the two screws A and two screws B attaching the side heat sink. (2) Remove the side heat sink from the main body. Fig.2 Panel assembly Button(detach) A B Side heat sink (No.MA254)1-9 3.1.3Removing the top

33、 chassis assembly (See Figs.3 to 6) Remove the panel assembly and side heat sink. (1) From the top side of the main body, remove the two screws C attaching the top chassis assembly. (See Fig.3.) (2) From the both sides of the main body, remove the two screws D attaching the top chassis assembly. (Se

34、e Figs.4 and 5.) (3) From the back side of the main body, remove the four screws E attaching the top chassis assembly. (See Fig.6.) (4) Lift the top chassis assembly in the direction of the arrow. (See Fig.6.) (5) Take out the top chassis assembly from the main body. Fig.3 Fig.4 Fig.5 Fig.6 Top chas

35、sis assembly C C Bottom chassis assembly Bottom chassis assembly Top chassis assembly D Bottom chassis assembly Top chassis assembly D Top chassis assembly E 1-10 (No.MA254) 3.1.4Removing the front chassis assembly (See Fig.7 and 8) Remove the panel assembly, side heat sink and top chassis assembly.

36、 (1) From the both sides of the top chassis assembly, remove the two screws E attaching the front chassis assembly. (See Fig.7 and 8.) (2) Remove the front chassis assembly from the top chassis assembly. Fig.7 Fig.8 3.1.5Removing the DVD mechanism assembly (See Figs.9) Remove the panel assembly, sid

37、e heat sink and top chassis assembly. Reference: Remove the front chassis assembly as required. (1) From the inside of the top chassis assembly, remove the three screws G attaching the DVD mechanism assembly and take out the DVD mechanism assembly. (2) From the side of the DVD mechanism assembly, re

38、move the double-stick tape fixing the insulator. (3) Remove the insulator from the top chassis assembly. Fig.9 F Front chassis assembly Top chassis assembly Top chassis assemblyFront chassis assembly F DVD mechanism assembly Top chassis assembly Double stick tape GG G (No.MA254)1-11 3.1.6Removing th

39、e connection control board (See Fig.10) Remove the panel assembly, side heat sink, top chassis as- sembly and DVD mechanism assembly. (1) From the top side of the DVD mechanism assembly, re- lease the lock of the connector CN965 on the connection control board and disconnect the card wire. (2) Remov

40、e the two screws H attaching the connection control board on the DVD mechanism assembly and remove the connection control board. Fig.10 DVD mechanism assembly CN965 Connection control board HH 1-12 (No.MA254) 3.1.7Removing the rear bracket (See Fig.11 to 13) Remove the panel assembly, side heat sink

41、 and top chassis assembly. (1) Remove the screw J, screw J, two screws K and screw M attaching the rear bracket. (See Fig. 11.) Reference: When attaching the screw J, attach the wire holder with it as before. (2) Remove the screw N attaching the wire holder. (See Fig.11.) (3) Release the lock of the

42、 connector (CN301, CN311, CN361, CN861, CN871, CN931) on the main board in an upward direction. (See Fig.12.) (4) Remove the car cable from the rear bracket. (See Fig.12.) Note: When attaching the car cable, do not touch the cable to X31, IC31, TU1 and IC701 then pushing down all the ca- ble to main

43、 board side by wire clamp. (See Fig.13.) (5) Take out the rear bracket from the bottom chassis assem- bly. 3.1.8Removing the main board (See Figs.12) Remove the panel assembly, side heat sink, top chassis as- sembly and rear bracket. (1) Release the lock of the connector CN962 on the main board in a

44、n upward direction and disconnect the flexible wire. (2) Release the lock of the connector (CN881, CN891) and disconnect the card wire. (3) Remove the two screws P attaching the main board to the bottom chassis assembly. (4) Take out the main board from the bottom chassis assem- bly. Fig.11 Fig.12 F

45、ig.13 M KJJ Rear bracketWire holder N Bottom chassis assembly CN962 CN891 CN881 CN931 CN871 CN361CN311CN861 CN301 Main board P P TU1 X31 IC31 Wire clamp Main boardWire clamp IC701 (No.MA254)1-13 3.1.9Removing the front door mechanism assembly (See Fig.14) Remove the front panel assembly, side heat s

46、ink, top chassis assembly main board and rear bracket. (1) From the top side of the bottom chassis assembly, remove the screw Q attaching the FPC guide to the bottom chassis. (2) Remove the five screws R attaching the front door mecha- nism assembly to the bottom chassis. Reference: When attaching t

47、he screws Q and R, apply a locking agent them. (3) Take out the front door mechanism assembly from the bot- tom chassis. Fig.14 3.1.10 Removing the panel A control board and panel panel B control board (See Figs.15 and 16) Remove the panel assembly. (1) From the back side of the panel assembly, remo

48、ve the six screws S attaching the rear cover to the panel assembly. (See Fig.15.) (2) From the inside of the rear cover, release the lock of the connector CN583 on the panel A control board and discon- nect the card wire. (See Fig.16.) (3) Remove the three screws T attaching the panel B control boar

49、d and take out the panel B control board from the rear cover. (See Fig.16.) Note: Do not lose the compression spring when taking out the panel A control board. (See Fig.16.) Fig.15 Fig.16 Bottom chassis R R Q FPC guide Front door mechanism assembly S S Rear cover Panel A control board Panel B control board CN583 Rear cover T 1-14 (No.MA254) 3.2DVD mechanism assembly 3.2.1Removing the mechanism control board (See Fig.1) Caution: Before disconnecting the flexible wire extending from the DVD pickup, so