Jvc-KDG-700-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.MA050 2004/1 CD RECEIVER MA05020041 KD-G700 TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC S

2、ERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 4ADJUSTMEN

3、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26 5TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-27

4、 Area suffix J - Northern America SOUND VOLVOL SOURCERF U D ATT RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA050) 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) Fr

5、ont19 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. Load Impedance4 (4 to 8 allowance) Equalizer Control RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 120 Hz) Mid12 dB

6、High12 dB (8 kHz, 10 kHz, 12 kHz, 15 kHz) Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-In Level/ImpedanceKD-AR8001.5 V/20 k load Line-Out Level/ImpedanceKD-AR8005.0 V/20 k load (full scale) KD-G8004.0 V/20 k load (full scale) KD-G7002.5 V/20 k load (full scale) Output Impedan

7、ce1 k Subwoofer-Out Level/Impedance KD-AR800/KD-G8002.0 V/20 k load (full scale) TUNER SECTION Frequency RangeFM87.5 MHz to 107.9 MHz AM530 kHz to 1 710 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 Fre

8、quency 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 channels (stereo) Frequency Response5 Hz to 20 0

9、00 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 Rate:192 Kbps GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) G

10、rounding SystemNegative ground Allowable Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 159 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.)1.5 kg (3.4 lbs) (excluding accessories) RadioFans.C

11、N 收音机爱 好者资料库 (No.MA050)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 preforming repair of this system. ! Please use enough caution not to see the beam directly or touch

12、 it in case of an adjustment or operation check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA050) 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 picku

13、p). 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 grounding in the area where repairs are being perfor

14、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.

15、(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

16、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

17、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)

18、 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 CD pickup

19、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 CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land a

20、fter 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.MA050)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.

21、 1-6 (No.MA050) SECTION 3 DISASSEMBLY 3.1Main body 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) Remove the front panel assembly. Fig.1 3.1.2Removing the heat sink (See Fig.2) (1) From the left side of the main

22、body, remove the two screws A, two screws B and screw C attaching the heat sink. Fig.2 Front panel assembly Detach button Heat sink AACB (No.MA050)1-7 3.1.3Removing the top chassis assembly (See Figs.3 to 6) Prior to performing the following procedures, remove the heat sink. Reference: Remove the fr

23、ont panel assembly as required. (1) From the bottom side of the main body, remove the two screws D attaching the top chassis assembly to the bottom chassis assembly. (See Fig.3.) (2) From the both and rear sides of the main body, remove the four screws E attaching the top chassis assembly to the bot

24、tom 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 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 D D Bot

25、tom chassis assembly Bottom chassis assembly Top chassis assembly E Top chassis assembly E Bottom chassis assembly CD mechanism assembly Main board CN501 Top chassis assembly Bottom chassis assembly Rear bracket E E 1-8 (No.MA050) 3.1.4Removing the front chassis (See Figs.7 and 8) Prior to performin

26、g the following procedure, remove the front panel assembly, heat sink and top chassis assembly. (1) From the both sides of the top chassis assembly, remove the two screws F attaching the front chassis. Fig.7 Fig.8 3.1.5Removing the CD mechanism assembly (See Fig.9) Prior to performing the following

27、procedures, remove the front panel assembly, heat sink and top chassis assembly. (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 chassis. Fig.9 Top chassis assembly Front chassis F Top

28、 chassis assembly Front chassis F Top chassis G GG CD mechanism assembly (No.MA050)1-9 3.1.6Removing the main board (See Figs.10 and 11) Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. (1) From the rear side of the bottom chassis ass

29、embly, remove the two screws H attaching the rear bracket to the bottom chassis assembly. (See Fig.10.) (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 Fig.11.) (3) Release the stopper of the connector CN701

30、on the main board in an upward direction, disconnect the card wire from the connector CN701. (See Fig.11.) (4) Disconnect the wire from the connector of the front door mechanism assembly. (See Fig.11.) (5) Disconnect the wire from the connector CN951 on the main board. (See Fig.11.) Reference: After

31、 connecting the wires, fix the wire with the wire holder. (6) Take out the main board from the bottom chassis assembly. Fig.10 Fig.11 3.1.7Removing the rear bracket (See Fig.12) Prior to performing the following procedures, remove the front panel assembly, heat sink, top chassis assembly and main bo

32、ard. (1) Remove the screw K and three screws L attaching the rear bracket to the main board. Fig.12 Rear bracket HBottom chassis assembly Connector Wire holder CN701 Stopper Bottom chassis assembly J J CN951 Wires Main board Card wire Front door mechanism assembly Rear bracket LL K 1-10 (No.MA050) 3

33、.1.8Removing the front door mechanism assembly (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 top side of the bottom chassis assembly, remove the screw M attaching the FPC guide to the bottom c

34、hassis. (2) Remove the five screws N attaching the front door mechanism assembly to the bottom chassis. Reference: When attaching the screws M and N, apply a locking agent them. (3) Take out the front door mechanism assembly from the bot- tom chassis. Fig.13 3.1.9Removing the front board (See Figs.1

35、4 to 16) 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 P attaching the rear cover assembly to the front panel assembly. (See Fig.14.) (2) Release the twelve joints a of the front panel assembl

36、y and remove the rear cover assembly. (See Fig.15.) (3) Take out the front board from the front panel assembly. (See Fig.16.) Note: When removing the rear cover assembly and front board, be careful not to lose the comp. spring. (See Fig.16.) Fig.14 Fig.15 Fig.16 Bottom chassis N N M FPC guide Front

37、door mechanism assembly P Rear cover assembly P P Rear cover assembly joints a joints a joints ajoints a Front boardFront panel assembly Comp. spring (No.MA050)1-11 3.2CD Mechanism Assembly 3.2.1Removing the top cover (See Figs.1 and 2) (1) Remove the two screws A on the both side of the body. (2) L

38、ift 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 1-12 (No.MA050) 3.2.2Removing the connector board (See Figs.3 to 5) CAUTION: Before disconnecting the flexible wire from the pickup, solder the shor

39、t-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 short-circuit point on the connector board. (3) Disconnect the flexible wire from the pickup. (4) Move the connector board in the direc

40、tion of the arrow to release the two joints b. (5) Unsolder the wire 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

41、Flexible wire Connector board Frame (No.MA050)1-13 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

42、wire Feed sw. holder 1-14 (No.MA050) 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 suspensio

43、n spring (L) and (R) are dif- ferent. Handle them 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

44、 Frame Chassis unit Frame Shafts Shaft Damper Damper Damper (No.MA050)1-15 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 rele

45、ase 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 1-16 (No.MA050) 3.2.6Removing the loading / feed motor assembly (See Figs.12 and 13) Prior to performing the follo

46、wing procedure, remove the top cover, connector board and chassis unit. (1) Remove the screw C and move the loading / feed motor assembly 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:

47、When reassembling, connect the wire from the loading / feed motor assembly to the flame as shown in Fig.12. Fig.12 Fig.13 Loading / feed motor assembly Loading / feed motor assembly C (No.MA050)1-17 3.2.7Removing the pickup unit (See Figs.14 to 18) Prior to performing the following procedure, remove

48、 the top cover, connector board and chassis unit. (1) Remove the screw 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 t

49、he feed sw. holder in the direction of the arrow. The joint g of the 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. 3.2.8Reattaching the pickup unit (See Figs.14 to 17) (1) Reattach the feed rack to the pickup unit using the 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 part f of the feed rack to th