Jvc-KDSHX-750-Service-Manual(1) 电路图 维修手册.pdf

《Jvc-KDSHX-750-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Jvc-KDSHX-750-Service-Manual(1) 电路图 维修手册.pdf（34页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA162 2005/4 CD/SD RECEIVER MA16220054 KD-AR7500,KD-SHX750 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-

2、3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

3、-6 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、 . . . . 1-28 Area suffix J - Northern America MENU KD-SHX750 PICT SOURCE DISP BACK BAND MENU KD-AR7500 PICT SOURCE DISP BACK BAND ARSENAL rogo KD-AR7500 JKD-SHX750 J RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA162) SPECIFICATION Design and specifications are subject to change without notice. AUDIO AMPLIFIER

5、SECTION Power Output22 W RMS 4 Channels at 4 and or = 1% THD+N Signal-to-Noise Ratio80 dBA (reference: 1 W into 4 ) 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 Line-In Level/

6、ImpedanceLINE IN1.5 V/20 k load Line-Out Level/ImpedanceLINE OUT5.0 V/20 k load (full scale) Output Impedance1 k Other TerminalsSUBWOOFER OUT Changer control Steering wheel remote input TUNER SECTION Frequency RangeFM87.5 MHz to 107.9 MHz (with channel interval set to 200 kHz) 87.5 MHz to 108.0 MHz

7、(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 ) 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 Selectivity65 dB CD/SD PLAYER SECTION TypeCompact disc player Signal Detection SystemNon-contact optical pickup (semiconductor laser) Number of Channels2 channels (stereo) Frequency Response5 Hz to 2

9、0 000 Hz Dynamic Range98 dB Signal-to-Noise Ratio102 dB Wow and FlutterLess than measurable limit MP3 (MPEG Audio Layer 3)Max. Bit Rate320 kbps WMA (Windows Media Audio) Max. Bit Rate192 kbps Playable SD CardFormatFAT 12/16 StorageUp to 512 MB Playable Audio Format for SD CardMP3/WMA GENERAL Power R

10、equirementOperating 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 157 mm (7-3/16 2-1/16 6-3/16) Panel Size (approx.)188 mm 58 mm 13 mm (7-7/16 2-5/16 9/16) Mass (approx.)1.

11、7 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA162)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 enough caut

12、ion 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.MA162) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser

13、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 grounding i

14、n 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 release any s

15、tatic 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 condition. (Refer

16、 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, as it is a

17、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 long a tim

18、e 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 to Disassem

19、bly 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 assembly, be s

20、ure 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 CN601 Short sectionsFlexible wire Mechanism control board (No.MA162)1-5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual d

21、oes not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MA162) 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) Remove the front panel assembly. Fig.1 3.1.2Removing the he

22、at sink (See Fig.2) Reference: Remove the front panel assembly as required. (1) From the left side of the main body, remove the two screws A and two screws B attaching the heat sink. (2) Remove the heat sink from the main body. Fig.2 Detach button Front panel assembly Heat sink AAB (No.MA162)1-7 3.1

23、.3Removing the top 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 chassi

24、s 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) Remove the screw E attaching the IC heat sink to bottom chassis assembly. (See Fig.5) (4) Lift the top chassis

25、assembly in the direction of the arrow, disconnect the connector CN503 on the mechanism con- trol board from the connector CN721 on the main board. (See Figs.4 to 6) (5) Take out the top chassis assembly from the bottom chassis assembly. Reference: Remove the screw E and the IC heat sink as required

26、. (See Fig5) Fig.3 Fig.4 Fig.5 Fig.6 Top chassis assembly C C Bottom chassis assembly Bottom chassis assembly Top chassis assembly D CN503 CN721 Main board Mechanism control board Top chassis assembly D Bottom chassis assembly Mechanism control board EE IC heat sink Top chassis assembly Bottom chass

27、is assembly Rear bracket D D 1-8 (No.MA162) 3.1.4Removing the front chassis assembly (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 both sides of the top chassis assembly, remove the two screws F attac

28、hing the front chassis assembly. (2) Remove the front chassis assembly from the top chassis assembly. Fig.7 Fig.8 3.1.5Removing the CD mechanism assembly (See Fig.9) Prior to performing the following procedures, remove the front panel assembly, heat sink and top chassis assembly. Reference: Remove t

29、he front chassis assembly as required. (1) From the inside of the top chassis assembly, remove the three screws G attaching the CD mechanism assembly. (2) Release the mecha heat sink from the slots a on the mech- anism control board and remove the mecha heat sink from the main body. (3) Take out the

30、 CD mechanism assembly from the top chas- sis. Fig.9 Top chassis assembly Front chassis assembly F Top chassis assembly Front chassis assembly F Top chassis Mecha heat sink G GG CD mechanism assembly a Mechanism control board (No.MA162)1-9 3.1.6Removing the main board (See Figs.10 and 11) Prior to p

31、erforming 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.10) (2) From the top side of the bottom chassis

32、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 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

33、of the front door mechanism assembly. (See Fig.11) (5) Disconnect the wire from the connector CN991 on the main board. (See Fig.11) 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.10 Fig.11 3.1.7Removing

34、the rear bracket (See Fig.12) 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, remove the wires from the rear bracket in the direction of the arrow. (2) Remove the screw K, screw L

35、 and four screws M attaching the rear bracket to the main board. Reference: 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.12 Rear bracket HBottom chassis assembly Connector Wire holders CN701 Stopper

36、 Bottom chassis assembly J J CN991Main board Card wire Front door mechanism assembly Rear bracket MMM K Main board Wire holder Slots Rear bracket Wires L 1-10 (No.MA162) 3.1.8Removing the front door mechanism assembly (See Fig.13) Prior to performing the following procedures, remove the front panel

37、assembly, heat 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 attachin

38、g the screws N and P, apply a locking agent them. (3) Take out the front door mechanism assembly from the bot- tom chassis. Fig.13 3.1.9Removing the switch board (See Figs.14 to 16) Prior to performing the following procedures, remove the front panel assembly. (1) From the rear side of the front pan

39、el assembly, remove the six screws Q attaching the rear cover to the front panel as- sembly. (See Fig.14) (2) Release the two joints b of the front panel assembly and re- move the rear cover. (See Fig.15.) (3) Take out the switch board from the front panel assembly. (See Fig.16) Note: When removing

40、the rear cover assembly and switch board, be careful not to lose the spring. Fig.14 Fig.15 Fig.16 Bottom chassis P P N FPC guide Front door mechanism assembly Q Rear cover assembly Q Q Rear cover assembly Joints bJoints b Switch board Front panel assembly Spring (No.MA162)1-11 3.2CD mechanism assemb

41、ly section Remove the CD mechanism assembly from the main body. (See 3.1.5 Removing the CD mechanism assembly.) 3.2.1Removing the mechanism control board (See Fig.1) (1) From the bottom side of the CD mechanism assembly, sol- der the short sections on the flexible wire. Caution: Solder the short sec

42、tions on the flexible wire before dis- connecting the flexible wire from the connector CN601 on the mechanism control board. If you do not follow this instruction, the CD pickup may be damaged. (2) Disconnect the flexible wire from the connector CN601 on the mechanism control board. (3) Disconnect t

43、he flexible wire from the connector CN602 on the mechanism control board. (4) Remove the solders from the soldered sections a on the mechanism control board and remove the wires of the feed motor. (5) Remove the solders from the soldered sections b on the mechanism control board, and remove each wir

44、e of the spindle motor and other parts. (6) Remove the five screws A attaching the mechanism con- trol board. Caution: When reassembling, remove the solders from the short sec- tions after connecting the flexible wire to the connector CN601 on the mechanism control board. Fig.1 A A CN601 Short secti

45、ons Feed motor Flexible wire CD mechanism assembly A Mechanism control board b Spindle motor A CN602 A a 1-12 (No.MA162) 3.2.2Removing the top cover (See Fig.2) (1) From the back side of the CD mechanism assembly, re- move the two screws B attaching the top cover. (2) Take out the top cover in an up

46、ward direction. Reference: When attaching the top cover, set the sections c of the top cov- er under the bending sections d of the chassis base 2. 3.2.3Removing the mechanism section (See Figs.2 to 4) Remove the mechanism control board and top cover. (1) From the front side of the CD mechanism assem

47、bly, re- move the two screws C attaching the right and left stop- pers. (See Fig.2.) (2) Remove the two floating springs on the bottom side of the CD mechanism assembly. (See Fig.3.) (3) Take out the mechanism section in an upward direction and remove the three damper springs from the dampers. (See

48、Fig.4.) Caution: When reassembling the mechanism section, reattach the damper springs to the dampers respectively and insert the three shafts on the bottom of the mechanism section to the dampers. (See Fig.4.) Before inserting the shaft to the dampers, apply IPA to the hole of damper. Fig.2 Fig.3 Fi

49、g.4 B Top cover Stopper Stopper C C B d c Chassis base 2 Floating spring Mechanism section Damper (Yellow) Damper (Black) Damper (Black) Damper spring(F) (Green) Damper spring(F) (Green) Damper spring(R) (Red) (No.MA162)1-13 3.2.4Removing the clamper unit (See Figs.5 and 6) Remove the mechanism control board, top cover and mecha- nism section. (1) From the bottom side of the mechanism section, remove the clamper 2 spring. (See Fig.5.) (2) Release section e of the clamper spring from the bending section of the CD chassis assembly. (See