Jvc-KDLH-401-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.MA063 2004/4 CD RECEIVER MA06320044 KD-LH401 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC

2、SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTME

3、NT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-28 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

4、9 Area suffix E - Continental Europe EX - Central Europe RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA063) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) Front19 W

5、 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. Load Impedance4 (4 to 8 allowance) Equalizer Control RangeFrequencies60 Hz, 150 Hz, 400 Hz, 1 kHz, 2.4 kHz, 6 kHz,

6、 12 kHz Level10 dB Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-Out Level/Impedance5.0 V/20 k load (full scale) Output Impedance1 k Other terminalsSUBWOOFER Changer control Steering wheel remote input TUNER SECTION Frequency RangeFM87.5 MHz to 108.0 MHz AM(MW) 522 kHz to 1 62

7、0 kHz (LW) 144 kHz to 279 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 Separation30 dB Capture Ratio1.5 dB MW TunerSensitivity20 V Selectivity35 dB LW TunerS

8、electivity50 V CD PLAYER SECTION TypeCompact disc player 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 (MPEG

9、1/2 Audio Layer 3)Max. Bit Rate320 Kbps WMA (Windows Media Audio)Max. Bit Rate192 Kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 159

10、mm Panel Size (approx.)188 mm 58 mm 12 mm Mass (approx.)1.6 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA063)1-3 SECTION 1 PRECAUTION 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 p

11、reforming 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.MA063) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the

12、 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 destroy the optical pickup (laser diode) in devices

13、 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 laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Gr

14、ound 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 optical pickup are shorted. After replacement,

15、 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 unit (optical pickup) (1) Do not subject the

16、 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 text. Remove the anti-static pin when repla

17、cing 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 the laser power. Do not turn it. 1.4Attenti

18、on 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 wire is disconnected from the connector on the pickup unit. (If the flexible wire is disconnected without applying solder, the pickup may be des

19、troyed 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 (Soldering) Flexible wire (No.MA063)1-5 1.5Important f

20、or 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. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfun

21、ctions. 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 defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety swi

22、tches 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 POSITION OF LABELS ! Please use enough caution not to see the beam directly or touch

23、 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 laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO

24、: 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 interlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PROD

25、UCT 1-6 (No.MA063) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MA063)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front

26、panel assembly. (2) Remove the front panel assembly. Fig.1 3.1.2Removing the heat sink (See Fig.2) (1) From the left side of the main body, remove the two screws A and three screws B attaching the heat sink. Fig.2 Front panel assembly Detach button Heat sink AAB 1-8 (No.MA063) 3.1.3Removing the top

27、chassis assembly (See Figs.3 to 6) Prior to performing the following procedures, remove the heat sink. Reference: Remove the front panel assembly as required. (1) From the bottom side of the main body, remove the two screws C attaching the top chassis assembly to the bottom chassis assembly. (See Fi

28、g.3.) (2) From the both and rear sides of the main body, remove the four screws D attaching the top chassis assembly to the bottom chassis assembly. (See Figs.4 to 6.) (3) Lift the top chassis assembly in the direction of the arrow, disconnect the connector CN501 on the mechanism con- trol board fro

29、m the connector CN702 on the main board. (See Figs.5 and 6.) (4) Take out the top chassis assembly from the bottom chassis assembly. Fig.3 Fig.4 Fig.5 Fig.6 Top chassis assembly C C Bottom chassis assembly Bottom chassis assembly Top chassis assembly D Top chassis assembly D Bottom chassis assembly

30、Mechanism control board Main board CN702 CN501 Top chassis assembly Bottom chassis assembly Rear bracket D D (No.MA063)1-9 3.1.4Removing the front chassis (See Figs.7 and 8) Prior to performing the following procedure, remove the front panel assembly, heat sink and top chassis assembly. (1) From the

31、 both sides of the top chassis assembly, remove the two screws E attaching the front chassis. Fig.7 Fig.8 3.1.5Removing the mechanism control board (See Fig.9) Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. (1) Disconnect the card w

32、ire from the connector CN601 on the mechanism control board. (2) Remove the five screws F attaching the mechanism control board. (3) Release the joints a and b, remove the mechanism control board. Fig.9 Top chassis assembly Front chassis E Top chassis assembly Front chassis E Mechanism control board

33、 CN601 F F F a b 1-10 (No.MA063) 3.1.6Removing the CD mechanism assembly (See Fig.10) Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. Reference: Remove the mechanism control board as required. (1) From the inside of the top chassis a

34、ssembly, remove the three screws G attaching the CD mechanism assembly. (2) Take out the CD mechanism assembly from the top chas- sis. Fig.10 3.1.7Removing the main board (See Figs.11 and 12) Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis ass

35、embly. (1) From the rear side of the bottom chassis assembly, remove the two screws H attaching the rear bracket to the bottom chassis assembly. (See Fig.11.) (2) From the top side of the bottom chassis assembly, remove the two screws J attaching the main board to the bottom chassis assembly. (See F

36、ig.12.) (3) Release the stopper of the connector CN701 on the main board in an upward direction, disconnect the card wire from the connector CN701. (See Fig.12.) (4) Disconnect the wire from the connector of the gear bracket unit. (See Fig.12.) (5) Disconnect the wire from the connector CN951 on the

37、 main board. (See Fig.12.) Reference: After connecting the wires, fix the wires with the wire holders. (6) Take out the main board from the bottom chassis assem- bly. Fig.11 Fig.12 Top chassis G GG CD mechanism assembly Rear bracket HBottom chassis assembly Connector Wire holders CN701 Stopper Botto

38、m chassis assembly J J CN951 Wires Main board Card wire Gear bracket unit (No.MA063)1-11 3.1.8Removing the rear bracket (See Fig.13) Prior to performing the following procedures, remove the front panel assembly, heat sink, top chassis assembly and main board. (1) From the rear side of the main board

39、, remove the wires from the rear bracket in the direction of the arrow. (2) Remove the two screws K and screw L attaching the rear bracket to the main board. Fig.13 3.1.9Removing the gear bracket unit (See Fig.14.) Prior to performing the following procedures, remove the front panel assembly, heat s

40、ink, top chassis assembly and main board. (1) From the top side of the bottom chassis assembly, remove the screw M attaching the FPC guide to the bottom chas- sis. (2) Remove the five screws N attaching the gear bracket unit to the bottom chassis. Reference: When attaching the screws M and N, apply

41、a locking agent them. (3) Take out the gear bracket unit from the bottom chassis. Fig.14 Rear bracket LK K Main board Wire holder Slots Wire Rear bracket Wire Bottom chassis N N M FPC guide Gear bracket unit 1-12 (No.MA063) 3.1.10 Removing the front board (See Figs.15 to 18) Prior to performing the

42、following procedures, remove the front panel assembly. (1) From the rear side of the front panel assembly, remove the four screws P attaching the rear cover assembly to the front panel assembly. (See Fig.15.) (2) Release the twelve joints c of the front panel assembly and remove the rear cover assem

43、bly. (See Fig.16.) (3) From the left side of the front panel assembly, pull out the knob in the direction of the arrow 2 while pulling the front board in the direction of the arrow 1. (See Fig.17.) (4) Take out the front board from the front panel assembly. (See Fig.18.) Note: When removing the rear

44、 cover assembly and front board, be careful not to lose the comp. spring. (See Fig.18.) Fig.15 Fig.16 Fig.17 Fig.18 P Rear cover assembly P P Rear cover assembly joints cjoints c joints cjoints c 12 Front panel assembly Front board Knob Front board Front panel assembly Comp. spring (No.MA063)1-13 3.

45、2CD Mechanism section 3.2.1Removing the top cover (See Figs.1 and 2) (1) Remove the four screws A on the both side of the body. (2) Lift the front side of the top cover and move the top cover backward to release the two joints a. Fig.1 Fig.2 A A A Joints aTop cover Joints a Top cover 1-14 (No.MA063)

46、 3.2.2Removing the connector board (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the short-circuit point on the pickup. No observance of this in- struction may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the sh

47、ort-circuit point on the pickup. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direction of the arrow to release the two joints b. (5) Unsolder the wires on the connector board if necessary. CAUTION: Unsolder the short-circuit point after reassembling. Fig.3 F

48、ig.4 Fig.5 B Connector board PickupShort-circuit point Joints b Wires Pickup Short-circuit point (Soldering) Flexible wire B Flexible wire Connector board Frame (No.MA063)1-15 3.2.3Removing the DET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2

49、) Unsolder the DET switch wire if necessary. Fig.6 Fig.7 Connector board DET switch Pickup DET switch Tab c Tab c DET switch wire Feed sw. holder 1-16 (No.MA063) 3.2.4Removing the chassis unit (See Figs.8 and 9) Prior to performing the following procedure, remove the top cover and connector board. (1) Remove the two suspension springs (L) and (R) attaching the chassis unit to the frame. CAUTION: The shape of the suspension spring (L) and (R) are dif- ferent. Handle them wi