Jvc-KDAR-760-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA112 2005/2 CD RECEIVER MA11220052 KD-AR760,KD-G710 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPE

2、CIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4AD

3、JUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . 1-28 Area suffix J - Northern America ARSENAL rogo LINE IN SUB WOOFER OUT KD-AR760KD-G710 RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA112) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER SECTION Power Output20 W RMS 4 Channels at 4 and or = 1% THD+N Signal to N

5、oise Ratio80 dBA (reference: 1 W into 4 ) Load Impedance4 (4 to 8 allowance) Equalizer Control RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 120 Hz) Mid12 dB High12 dB (8 kHz, 10 kHz, 12 kHz, 15 kHz) Frequency Response40 Hz to 20 000 Hz Line-Out Level/ImpedanceKD-AR7601.5 V/20 k load Line-Out Level/Impedance

6、KD-AR7605.0 V/20 k load (full scale) KD-G7104.0 V/20 k load (full scale) Output Impedance1 k Subwoofer-Out Level/Impedance KD-AR7602.0 V/20 k load (full scale) Other terminalsCD changer, LINE IN (for KD-AR760),SUBWOOFER (for KD-AR760) TUNER SECTION Frequency RangeFM87.5 MHz to 107.9 MHz (with channe

7、l interval set to 200 kHz) 87.5 MHz to 108.0 MHz (with channel interval set to 50 kHz) AM530 kHz to 1 710 kHz (with channel interval set to 10 kHz) 531 kHz to 1 602 kHz (with channel interval set to 9 kHz) FM TunerUsable Sensitivity11.3 dBf (1.0 V/75 ) 50 dB Quieting Sensitivity16.3 dBf (1.8 V/75 )

8、Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 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

9、 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 WMA (Windows Media Audio) decoding formatMax. Bit Rate192 Kbps GENERAL Power RequirementOpera

10、ting 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 (7-3/16 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

11、.5 kg (3.4 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA112)1-3 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

12、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.MA112) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy

13、 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 such as CD players. Be careful to use proper

14、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) Ground yourself Use an anti-static wrist strap to re

15、lease 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, return the shorted parts to their original condit

16、ion. (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 traverse unit (optical pickup) to strong shocks,

17、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 replacing the traverse unit. Be careful not to take too

18、 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. 1.4Attention when traverse unit is decomposed *Please refer

19、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 disconnected without applying solder, the CD pickup may be destroyed by static electricity.) In the ass

20、embly, 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.MA112)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1 HOW TO IDEN

21、TIFY MODELS 2.1.1NAME PLATE Discernment sign (as same as KD-AR760) 1-6 (No.MA112) 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 panel assembly. (2) Take out the front panel assembly. Fig.1

22、 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. (2) Take out the heat sink. Fig.2 Front panel assembly Detach button Heat sink AAB (No.MA112)1-7 3.1.3Removing the top chassis assembly (See Figs.3 to

23、 6) Prior to performing the following procedures, remove the heat sink. Reference: Remove the front panel assembly as required. (Refer to 3.1.1 Removing the front panel assembly) (1) From the bottom side of the main body, remove the two screws C attaching the top chassis assembly to the bottom chass

24、is assembly. (See Fig.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, and disconnect the connector CN501 on the mecha c

25、ontrol board from 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 ch

26、assis assembly Mecha control board Main board CN702 CN501 Top chassis assembly Bottom chassis assemblyRear bracket D D 1-8 (No.MA112) 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. (

27、1) From the both sides of the top chassis assembly, remove the two screws E attaching the front chassis. (See Figs.7 and 8) (2) Take out the front chassis. Fig.7 Fig.8 3.1.5Removing the mecha control board (See Fig.9) Prior to performing the following procedures, remove the front panel assembly, hea

28、t sink and top chassis assembly. Reference: Remove the front chassis as required. (Refer to 3.1.4 Remov- ing the front chassis) (1) Disconnect the card wire from the connector CN601 on the mecha control board. (2) Remove the five screws F attaching the mecha control board. (3) Release the craw a, an

29、d take out the mecha control board. Reference: After attaching the mecha control board, attach it to the craw a and pass the slot b of it into the boss of the CD mechanism as- sembly. Fig.9 Top chassis assembly Front chassis E Top chassis assembly Front chassis E Mecha control boardCN601 F F F Slot

30、b Craw a (No.MA112)1-9 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 front chassis and mecha control board as re- quired.(Refer to 3.1.4 Removing the front

31、chassis and 3.1.5 Removing the mecha control board) (1) From the inside of the top chassis assembly, 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 perform

32、ing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. (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 assemb

33、ly, remove the two screws J attaching the main board to the bottom chassis assembly. (See Fig.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

34、 front door mechanism assembly. (See Fig.12) (5) Disconnect the wire from the connector CN951 on the main board. (See Fig.12) Reference: After connecting the wires, fix the wires with the wire clamp. (6) Take out the main board from the bottom chassis assem- bly. Fig.11 Fig.12 Top chassisG GG CD mec

35、hanism assembly Rear bracket HBottom chassis assembly Connector Wire clamp CN701 Stopper Bottom chassis assembly J J CN951WiresMain board Card wire Front door mechanism assembly 1-10 (No.MA112) 3.1.8Removing the rear bracket (See Fig.13) Prior to performing the following procedures, remove the front

36、 panel assembly, heat sink, top chassis assembly and main board. (1) From the rear side of the main board, remove the wires from the rear bracket in the direction of the arrow. (2) Remove the screw K, three screws L and screw M attach- ing the rear bracket to the main board. Reference (For KD-AR760

37、only): After attaching the rear bracket to the main board, pass the wires through the wire holder and insert them into the slots of the rear bracket. Fig.13 3.1.9Removing the front door mechanism assembly (See Fig.14) Prior to performing the following procedures, remove the front panel assembly, hea

38、t sink, top chassis assembly and main board. (1) From the top side of the bottom chassis assembly, remove the screw N attaching the FPC guide to the bottom chassis. (2) Remove the five screws P attaching the front door mecha- nism assembly to the bottom chassis. Reference: When attaching the screws

39、N and P, apply a locking agent them. (3) Take out the front door mechanism assembly from the bot- tom chassis. Fig.14 Rear bracket LLK M Main boardWire holder (KD-AR760) Slots Wire (KD-AR760) Rear bracket Bottom chassis P P N FPC guide Front door mechanism assembly (No.MA112)1-11 3.1.10 Removing the

40、 front board (See Figs.15 to 17) Prior to performing the following procedures, remove the front panel assembly. (1) From the rear side of the front panel assembly, remove the four screws Q attaching the rear cover assembly to the front panel assembly. (See Fig.15) (2) Release the twelve joints c of

41、the front panel assembly and remove the rear cover assembly. (See Fig.16) (3) Take out the front board from the front panel assembly. (See Fig.17) Note: When removing the rear cover assembly and front board, be careful not to lose the comp. spring. (See Fig.17) Fig.15 Fig.16 Fig.17 Q Rear cover asse

42、mbly Q Q Rear cover assembly Joints cJoints c Joints cJoints c Front board Front panel assembly Comp. spring 1-12 (No.MA112) 3.2CD 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

43、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 (No.MA112)1-13 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 observa

44、nce of this in- struction 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)

45、 Unsolder the wires on 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 1-14 (No.MA11

46、2) 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) 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 (No.MA112)1-15 3.2.4Removin

47、g 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

48、 with care. When reassembling, 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 Dam

49、per Damper 1-16 (No.MA112) 3.2.5Removing 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 assembly Joint d Joint d Clamper assembly Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assembly (No.MA112)1-17 3.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Pri