Jvc-KDLH-3105-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No.49839 2003/5 CD RECEIVER 4983920035 KD-LH3105 TABLE OF CONTENTS 1Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2Disas

2、sembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、 . . . . . . . 24 4Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Area Suffix U - Other Areas RadioFans.CN 收音机爱 好者资料库 1-2 (No.49839) SPECIFICATION Design and specifications are subject to ch

4、ange without notice. AUDIO AMPLIFIER SECTION Maximum Power OutputFront50 W per channel Rear50 W per channel Continuous Power Output (RMS) 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

5、 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, 12 kHz Level10 dB Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-In Level/Impedance1.5 V/20 k load Line-Out Level/Impedance 4.0 V/

6、20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/ Impedance 2.0 V/20 k load (full scale) TUNER SECTIONFrequency RangeFM87.5 MHz to 108.0 MHz AM531 kHz to 1 602 kHz FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity 16.3 dBf (1.8 V/75 ) Alternate Channel Selectivi

7、ty (400 kHz) 65 dB Frequency Response 40 Hz to 15 000 Hz Stereo Separation35 dB Capture Ratio1.5 dB AM TunerSensitivity20 V Selectivity35 dB CD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of channels2 channels (stereo) Frequen

8、cy 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 Rate320 Kbps GENERALPower RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding System Negative ground Allowable O

9、perating Temperature 0C to +40C Dimensions (W H D) Installation Size (approx.) 182 mm 52 mm 150 mm Panel Size (approx.)188 mm 58 mm 12 mm Mass (approx.)1.4 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.49839)1-3 SECTION 1 Precautions 1.1Safety Precautions ! Burrs formed during molding may b

10、e 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 operation check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.49839) 1.2Preventing sta

11、tic 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. 1.2.1 Grounding to prevent damage by static electr

12、icity Static electricity in the work area can destroy 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 sh

13、eet) 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 quality during transport and before installation, bo

14、th 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 pickup. The testers internal power source can easily d

15、estroy 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. after replacing the optical pickup. For specific d

16、etails, 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 when subjected to strong force. (4) It is not possib

17、le 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 CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the C

18、D pickup unit. (If the flexible wire is disconnected without applying solder, the CDpickup 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 s

19、heet) or iron plate Pickup Short-circuit point (Soldering) Flexible wire PickupShort-circuit point (No.49839)1-5 SECTION 2 Disassembly method 2.1Main body 2.1.1Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower left part of the front panel assembly and remove the f

20、ront panel assembly. Fig.1 2.1.2Removing the bottom cover (See Fig.2) Prior to performing the following procedure, remove the front panel assembly as required. (1) Turn over the main body and release the two joints a, two joints b and joint c. Caution: Do not damage the main board when releasing the

21、 joints using a screwdriver. Fig.2 Front panel assembly Detach button Bottom cover Joint a Joint b Joint a Joint b Joint c 1-6 (No.49839) 2.1.3Removing the front chassis assembly (See Figs.3 and 4) Prior to performing the following procedures, remove the front panel assembly and bottom cover. (1) Re

22、move the two screws A on the both sides of the main body. (See Fig.3.) (2) Remove the two screws B on the front side of the main body. (See Fig.4.) (3) Release the two joints d and two joints e on the both sides of the main body. (See Fig.3.) Fig.3 Fig.4 2.1.4Removing the heat sink (See Fig.5) Prior

23、 to performing the following procedure, remove the front panel assembly as required. (1) Remove the two screws C and two screws D on the left side of the main body. Fig.5 2.1.5Removing the rear bracket (See Fig.6) Prior to performing the following procedures, remove the bot- tom cover. (1) Remove th

24、e three screws E, three screws F and three screws G on the back side of the main body. (2) Remove the rear bracket. Reference: During reassembly, before fixing the rear bracket onto the main body, insert the SUB WOOFER cable and LINE IN cable into the slots. Fig.6 Joint d Joint d Front chassis assem

25、bly A Joint e Joint e A B Front chassis assembly C D Heat sink FG E E Rear bracket G F Insert SUB WOOFER cable and LINE IN cable into the slots. (No.49839)1-7 2.1.6Removing the main board (See Fig.7) Prior to performing the following procedures, remove the front panel assembly, bottom cover, front c

26、hassis assembly, heat sink and rear bracket. (1) Remove the two screws H attaching the main board. (2) Disconnect the connector CN601 and remove the main board in an upward direction. Fig.7 2.1.7Removing the mecha control board (See Fig.8) Prior to performing the following procedures, remove the fro

27、nt panel assembly, bottom cover, front chassis assembly, heat sink, rear bracket and main board. (1) Remove the five screws J attaching the mecha control board. (2) Disconnect the card wire from the mecha connector. (3) Move the mecha control board in the direction of the arrow to release it from th

28、e joint f. Fig.8 2.1.8Removing the CD mechanism assembly (See Fig.9) Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, heat sink, rear bracket, main board and mecha control board. (1) Remove the three screws K attaching the CD mechani

29、sm assembly to the top chassis. Fig.9 Main board H H CN601 J J Mecha control board Mecha connector Card wire Top chassis Joint f K K CD mechanism assembly Top chassis 1-8 (No.49839) 2.1.9Removing the front board (See Figs.10 to 12) Prior to performing the following procedures, remove the front panel

30、 assembly. (1) Remove the five screws L attaching the rear cover on the back side of the front panel assembly. (See Fig.10.) (2) Release the eight joints g, remove the rear cover from the front panel assembly. (See Fig.11.) (3) Take out the front board. (See Fig.12.) Fig.10 Fig.11 Fig.12 L LL L Fron

31、t panel assembly Rear cover Joint g Joint g Rear cover Front panel assembly Front board (No.49839)1-9 2.2 CD Mechanism section 2.2.1Removing 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 bac

32、kward to release the two joints a. Fig.1 Fig.2 A A A Joints aTop cover Joints a Top cover 1-10 (No.49839) 2.2.2Removing 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- struc

33、tion may cause damage of the pickup. (1) Remove the screw B fixing the connector board. (2) Solder the short-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 o

34、n the connector board if necessary. CAUTION: Unsolder the short-circuit point after reassembling. Fig.3 Fig.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.49839)1-11 2.2.3Removing the D

35、ET switch (See Figs.6 and 7) (1) Extend the two tabs c of the feed sw. holder and pull out the switch. (2) 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 1-12 (No.49839) 2.2.4Removing the chassis unit (S

36、ee 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 with care. When reas

37、sembling, make sure that the three shafts on the underside of the chassis unit are inserted to the dampers certainly. Fig.8 Fig.9 Suspension spring (L) Suspension spring (L) Suspension spring (R) Suspension spring (R) Chassis unit Frame Chassis unit Frame Shafts Shaft Damper Damper Damper (No.49839)

38、1-13 2.2.5Removing the clamper assembly (See Figs.10 and 11) Prior to performing the following procedure, remove the top cover. (1) Remove the clamper arm spring. (2) Move the clamper assembly in the direction of the arrow to release the two joints d. Fig.10 Fig.11 Clamper arm spring Chassis rivet a

39、ssembly Joint d Joint d Clamper assembly Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assembly 1-14 (No.49839) 2.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Prior to performing the following procedure, remove the top cover, connector board and chassis unit

40、. (1) Remove the screw C and move the loading / feed motor as- sembly in the direction of the arrow to remove it from the chassis rivet assembly. (2) Disconnect the wire from the loading / feed motor assembly if necessary. CAUTION: When reassembling, connect the wire from the loading / feed motor as

41、sembly to the flame as shown in Fig.12. Fig.12 Fig.13 Loading / feed motor assembly Loading / feed motor assembly C (No.49839)1-15 2.2.7Removing the pickup unit (See Figs.14 to 18) Prior to performing the following procedure, remove the top cover, connector board and chassis unit. (1) Remove the scr

42、ew D and pull out the pu. shaft holder from the pu. shaft. (2) Remove the screw E attaching the feed sw. holder. (3) Move the part e of the pickup unit upward with the pu. shaft and the feed sw. holder, then release the joint f of the feed sw. holder in the direction of the arrow. The joint g of the

43、 pickup unit and the feed rack is released, and the feed sw. holder comes off. (4) Remove the pu. shaft from the pickup unit. (5) Remove the screw F attaching the feed rack to the pickup unit. 2.2.8Reattaching the pickup unit (See Figs.14 to 17) (1) Reattach the feed rack to the pickup unit using th

44、e screw F. (2) Reattach the feed sw. holder to the feed rack while setting the joint g to the slot of the feed rack and setting the joint f of the feed rack to the switch of the feed sw. holder correct- ly. (3) As the feed sw. holder is temporarily attached to the pickup unit, set to the gear of the

45、 joint g and to the bending part of the chassis (joint h) at a time. CAUTION: Make sure that the part i on the underside of the feed rack is certainly inserted to the slot j of the change lock lever. (4) Reattach the feed sw. holder using the screw E. (5) Reattach the pu. shaft to the pickup unit. R

46、eattach the pu. shaft holder to the pu. shaft using the screw D. Fig.14 Fig.15 Fig.16 Fig.17 Fig.18 Feed sw. holder E D Joint g Joint f Part e Pickup unit Pu. shaft holder Pu. shaft Feed sw. holder Part e Pickup unit Feed rack Feed sw. holder D E Joint f Pu. shaft holder Pu. shaft Pickup unit Joint

47、h Part i Slot j Joint g FFeed rack Pickup unit Joint f Joint g Feed rack Pickup unit Feed sw. holder 1-16 (No.49839) 2.2.9Removing the trigger arm (See Figs.19 and 20) Prior to performing the following procedure, remove the top cover, connector board and clamper unit. (1) Turn the trigger arm in the

48、 direction of the arrow to release the joint k and pull out upward. CAUTION: When reassembling, insert the part m and n of the trigger arm into the part p and q at the slot of the chassis rivet assembly respectively and join the joint k at a time. Fig.19 Fig.20 2.2.10 Removing the top plate assembly

49、 (See Fig.21) Prior to performing the following procedure, remove the top cover, connector board, chassis unit, and clamper assembly. (1) Remove the screw H. (2) Move the top plate assembly in the direction of the arrow to release the two joints r. (3) Unsolder the wire marked s if necessary. Fig.21 Joint k Trigger arm Chassis rivet assembly Trigger arm Chassis rivet assembly Part p Part m Part n Part q Top plate assembly Joints r s H (No.49839)1-17 2.2.11 Removing the mode sw. / select lock arm (See Figs.22 and 23) Prior to performi