Jvc-KDG-524-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA232 2005/11 CD RECEIVER MA232200511 KD-AR470,KD-G420,KD-G521, KD-G524,KD-G525,KD-G527 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . .

2、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12 5TROUBLESHOOTING . .

4、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 Area suffix J - Northern America KD-AR470,KD-G420 Area suffix E - Southern Europe EX - Northern Europe EY - Eastern Europe EU - Turkey KD-G521 Area suffix UI - India KD

5、-G524 Area suffix UT - Taiwan UH - Thailand UN - Indonesia U - Other Areas KD-G525 Area suffix EE - Russian Federation KD-G527 KD-AR470 KD-G527 KD-G420 KD-G521KD-G524 KD-G525 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA232) SPECIFICATION Microsoft and Windows Media are either registered trademarks or trademar

6、ks of Microsoft Corporation in the United States and/or other countries. Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Power OutputKD-AR470, KD-G42020 W RMS 4 Channels at 4 and or = 1% THD+N Maximum Power OutputKD-G521, KD-G524, KD-G525, KD-G527 Front50 W pe

7、r channel Rear50 W per channel Continuous Power Output (RMS) KD-G521, KD-G524, KD-G525, KD-G527 Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Rear19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total harmonic distortion. Signal to

8、 Noise RatioKD-AR470, KD-G42080 dBA (reference: 1 W into 4 ) KD-G521, KD-G524, KD-G525, KD-G527 70 dB Load Impedance4 (4 to 8 allowance) Tone Control RangeBass10 dB at 100 Hz Treble10 dB at 10 kHz Frequency Response40 Hz to 20 000 Hz Line-Out Level/Impedance KD-AR4704.0 V/20 k load (full scale) KD-G

9、420, KD-G521, KD-G524, KD-G525, KD-G527 2.5 V/20 k load (full scale) Output Impedance1 k Other TerminalsCD changer, Steering wheel remote input ( Only KD-G521 ), AUX (auxiliary) input jack TUNER SECTION Frequency RangeFM ( KD-AR470, KD-G420 )87.5 MHz to 107.9 MHz (with channel interval set to 100 kH

10、z or 200 kHz) 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz) FM ( KD-G521, KD-G524, KD-G525 )87.5 MHz to 108.0 MHz FM1/FM2 ( KD-G527 )87.5 MHz to 108.0 MHz FM3 ( KD-G527 )65.00 MHz to 74.00 MHz AM ( KD-AR470, KD-G420 )530 kHz to 1 710 kHz (with channel interval set to 10 kHz) 531 kHz to

11、 1 602 kHz (with channel interval set to 9 kHz) AM ( KD-G521, KD-G527 )(MW) 522 kHz to 1 620 kHz (LW) 144 kHz to 279 kHz AM ( KD-G524, KD-G525 )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 (400 kHz)65

12、 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation35 dB Capture Ratio1.5 dB AM TunerKD-AR470, KD-G420, KD-G524, KD-G525 Sensitivity20 V Selectivity35 dB MW TunerKD-G521, KD-G527Sensitivity20 V Selectivity35 dB LW TunerKD-G521, KD-G527Sensitivity 50 V CD PLAYER SECTION TypeCompact disc player

13、 Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than measurable limit MP3 Decoding FormatMPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps

14、WMA (Windows Media Audio) Decoding FormatMax. Bit Rate: 192 kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 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 150 mm (7-3/

15、16 2-1/16 5-15/16) Panel Size (approx.)188 mm 58 mm 11 mm (7-7/16 2-5/16 7/16) Mass (approx.)1.5 kg (3.3 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA232)1-3 SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefo

16、re, 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 operation check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA232) 1.2Preventing static electricity Electrostatic discharge (ESD), wh

17、ich 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. 1.2.1 Grounding to prevent damage by static electricity Static electricity in the work area can des

18、troy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed. (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

19、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 quality during transport and before installation, both sides of the laser diode on the replacement op

20、tical 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 pickup. The testers internal power source can easily destroy the laser diode. 1.3Handling the traverse

21、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. after replacing the optical pickup. For specific details, refer to the replacement procedure in the

22、 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 when subjected to strong force. (4) It is not possible to adjust the semi-fixed resistor that adjusts

23、 the laser power. Do not turn it. 1.4Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If the flexible wire is disconnec

24、ted without applying solder, the CD 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 wrist strap Conductive material (conductive sheet) or iron plate Pickup Short-circuit point (

25、Soldering) Flexible wire PickupShort-circuit point (No.MA232)1-5 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 exposure to beam. 3.CAUTION : There are no serviceable parts inside the Laser Unit.

26、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 radiation when the drawer is open and the safety interlocks have failed or are def

27、eated. 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 specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSIT

28、ION 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 or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling l

29、aserstrlning 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 itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller in

30、terlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PRODUCT 1-6 (No.MA232) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1Difference point KD-AR470, KD-G420, KD-G524 and KD-G525 KD-G521, KD-G527 2.2CD mechanism For Cd mechanism, please refer mechanism amnual No. MY001. KD-AR470KD-

31、G420/KD-G524/KD-G525 Remote controllerYESNO Telephone MutingYESNO Line Out Level / Impedance4.0V / 20kohm load2.5V / 20kohm load KD-G521KD-G527 Steering wheel remote inputYESNO (No.MA232)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the front panel assembly (See Fig.1) (1) Push the co

32、ntrol panel release button in the lower left part of the front panel assembly and remove the front panel as- sembly. (2) Take out the front panel assembly. Fig.1 3.1.2Removing the bottom cover (See Fig.2) (1) Turn the main body up side down. (2) Insert a screwdriver under the joints to release the j

33、oints a on the left side, joints b on the right side and joint c on the back side of the main body, then remove the bottom cover from the main body. Caution: When releasing the joints using a screwdriver, do not damage the main board. Fig.2 Front panel assembly Control panel release button Bottom co

34、ver a b a b c 1-8 (No.MA232) 3.1.3Removing the front chassis assembly (See Figs.3 and 4) Remove the front panel assembly and bottom cover. (1) Remove the two screws A on the front side of the main body. (See Fig.3) (2) Remove the two screws B on the both sides of the main body. (See Fig.4) (3) Relea

35、se the joints d and joints e on the both sides of the main body, then remove the front chassis assembly toward the front. (See Fig.4) Fig.3 Fig.4 3.1.4Removing the side panel (See Fig.5) Reference: Remove the front panel assembly as required. (1) Remove the two screws C and screw D attaching the sid

36、e panel on the left side of the main body. (2) Take out the side panel from the main body. Fig.5 A Front chassis assembly d d Front chassis assembly B e e B Side panel CCD (No.MA232)1-9 3.1.5Removing the rear bracket (See Fig.6) For KD-AR470, KD-G420, KD-G524 and KD-G525 Remove the bottom cover. (1)

37、 Remove the three screws E, three screws F and three screws G attaching the rear bracket on the back side of the main body. (2) Take out the rear bracket. 3.1.6Removing the rear bracket (See Fig.6) For KD-G521 and KD-G527 Remove the bottom cover. (1) Remove the three screws E, three screws F and scr

38、ew G attaching the rear bracket on the back side of the main body. (2) Remove the screw H attaching the steering remote cable on the rear bracket. KD-G521 only (3) Take out the rear bracket. 3.1.7Removing the main board (See Figs.6 and 7) Remove the front panel assembly, bottom cover, front chassis

39、assembly and side panel. (1) Remove the three screws E attaching the rear bracket on the back side of the main body. (See Fig.6.) (2) Remove the two screws J attaching the main board. (See Fig.7.) (3) Disconnect the connector CN101 and take out the main board. (See Fig.7.) Reference: Remove the rear

40、 bracket as required. Fig.6 Fig.7 F EE Rear bracket GFG For KD-AR470, KD-G420, KD-G524 and KD-G525 E F Rear bracket E E FG H Steering remote cable KD-G521 only For KD-G521 and KD-G527 Main board J J CN101 Rear bracket For KD-AR470, KD-G420, KD-G524 and KD-G525 For KD-G521 and KD-G527 Main board J J

41、CN501 Rear bracket 1-10 (No.MA232) 3.1.8Removing the CD mechanism control board (See Fig.8) For KD-AR470, KD-G420, KD-G524 and KD-G525 Remove the front panel assembly, bottom cover, front chassis assembly, side panel and main board. (1) Disconnect the card wire from the connector CN601 on the CD mec

42、hanism control board. (2) Remove the five screws K attaching the CD mechanism control board. (3) Remove the joint f an upward direction and remove the joint g in the direction of the arrow. Fig.8 3.1.9Removing the CD mechanism assembly (See Fig.9) Remove the front panel assembly, bottom cover, front

43、 chassis assembly, side panel, main board and CD mechanism control board. (1) Remove the three screws M attaching the top chassis. (2) Take out the CD mechanism assembly. Fig.9 CD mechanism control board CN601 K K K f g M M CD mechanism assembly Top chassis (No.MA232)1-11 3.1.10 Removing the switch

44、board (See Figs.10 to 12) Remove the front panel assembly. (1) Remove the five screws N attaching the front panel assem- bly. (See Fig.10) (2) Release the ten joints h and take out the rear cover. (See Fig.11) (3) Lift the switch board from the front panel assembly little by little and take out the

45、switch board. (See Fig.12) Reference: The volume knob is removed from the front side simultaneous- ly. Note: When removing the rear cover assembly and switch board, be careful not to lose the compression spring and comp. spring. (See Fig.12) Fig.10 Fig.11 Fig.12 N Rear cover Rear cover h h hh Switch

46、 board Compression spring Comp. spring Front panel assembly 1-12 (No.MA232) SECTION 4 ADJUSTMENT 4.1Adjustment method ? ? Test instruments required for adjustment (1) Digital oscilloscope (100MHz) (2) Electric voltmeter (3) Digital tester (4) Tracking offset meter (5) Test Disc JVC :CTS-1000 (6) Ext

47、ension cable for check EXTSH002-22P 1 ? ? Standard volume position Balance and Bass leave all servicing to qualified service personnel. 3. CAUTION: Visible and invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam. How to reset your unit Your preset adju

48、stments will also be erased. How to forcibly eject a disc “PLEASE” and “EJECT” appear alternately on the display. If this does not work, reset your unit. Be careful not to drop the disc when it ejects. Time countdown indicator EN02-05KD-AR470_420Jf.indd 2EN02-05KD-AR470_420Jf.indd 29/22/05 9:02:29 A

49、M9/22/05 9:02:29 AM ENGLISH 3 How to read this manual Button operations are mainly explained with the illustrations in the table below. Some related tips and notes are explained in “More about this unit” (see pages 20 22). Press briefly. Press repeatedly. Press either one. Press and hold until your de