Jvc-KDSHX-751-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MA163 2005/4 CD/SD RECEIVER MA16320054 KD-SHX751 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFI

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

3、MENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

4、-29 MENU KD-SHX751 PICT SOURCE DISP BACK T/P BAND Area suffix E - Southern Europe EX - Northern Europe EY - Eastern Europe EU - Turkey RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA163) SPECIFICATION Design and specifications are subject to change without notice. Microsoft and Windows Media are either registere

5、d trademarks or trademarks of Microsoft Corporation in the United States and/ or other countries. SD logo is a trademark. AUDIO AMPLIFIER SECTION Maximum Power OutputFront52 W per channel Rear52 W per channel Continuous Power Output (RMS) Front22 W per channel into 4 , 40 Hz to 20 000 Hz at no more

6、than 0.8% total harmonic distortion. Rear22 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, 12 kHz Level10 dB Frequency Response40 Hz to 20 000

7、 Hz Signal-to-Noise Ratio70 dB Line-In Level/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 108.0 MHz AM(MW) 522 kHz t

8、o 1 620 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 Separation35 dB Capture Ratio1.5 dB MW TunerSensitivity20 V Selectivity65 dB LW

9、TunerSensitivity50 V CD/SD 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 Range98 dB Signal-to-Noise Ratio102 dB Wow and FlutterLess than measurable limit

10、 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 RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground Allo

11、wable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)182 mm 52 mm 157 mm Panel Size (approx.)188 mm 58 mm 13 mm Mass (approx.)1.7 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA163)1-3 SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding m

12、ay 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 it in case of an adjustment or operation check. RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA163) 1.2Preventing

13、 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 pickup). Take care to prevent this when performing repairs. 1.2.1 Grounding to prevent damage by static el

14、ectricity 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 conductiv

15、e 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. (3) Handling the optical pickup In order to maintain quality during transport and before installation

16、, 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 check the condition of the laser diode in the optical pickup. The testers internal power source can easi

17、ly 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 shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specif

18、ic 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) Handle the flexible cable carefully as it may break when subjected to strong force. (4) It is not po

19、ssible 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 t

20、he 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 sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conduct

21、ive sheet) or iron plate CN601 Short sectionsFlexible wire Mechanism control board (No.MA163)1-5 1.5Important for 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 serviceab

22、le parts inside the Laser Unit. Do not disassemble the Laser Unit. Replace the complete Laser Unit if it malfunctions. 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 i

23、nterlocks have failed or are defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches 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

24、exposure. REPRODUCTION AND POSITION OF LABELS ! Please use enough caution not to see the beam directly or touch 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)

25、 VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstr

26、ling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PRODUCT 1-6 (No.MA163) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MA163)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.

27、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) Reference: Remove the front panel assembly as required. (1) From the left side of the main

28、 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 1-8 (No.MA163) 3.1.3Removing the top chassis assembly (See Figs.3 to 6) Prior to performing the following procedures, remove th

29、e 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 Fig.3) (2) From the both and rear sides of the main body, remove the four screws D attaching

30、 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 assembly in the direction of the arrow, disconnect the connector CN503 on the mechanism con- trol board from

31、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. (See Fig5) Fig.3 Fig.4 Fig.5 Fig.6 Top chassis assembly C C Bottom chassis assembly Bottom chassis assembly

32、 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 chassis assembly Rear bracket D D (No.MA163)1-9 3.1.4Removing the front chassis assembly (See Figs.7 and 8) Prior

33、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 attaching the front chassis assembly. (2) Remove the front chassis assembly from the top chassis assembly. Fig.7 Fi

34、g.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 the front chassis assembly as required. (1) From the inside of the top chassis assembly, remove the three screw

35、s 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 CD mechanism assembly from the top chas- sis. Fig.9 Top chassis assembly Front chassis assembly F Top chassis

36、 assembly Front chassis assembly F Top chassis Mecha heat sink G GG CD mechanism assembly a Mechanism control board 1-10 (No.MA163) 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)

37、 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 assembly, remove the two screws J attaching the main board to the bottom chassis assembly. (See Fig.11) (3)

38、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 of the front door mechanism assembly. (See Fig.11) (5) Disconnect the wire from the connector CN991 on the m

39、ain 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 the rear bracket (See Fig.12) Prior to performing the following procedures, remove the front panel assembly,

40、 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 and four screws M attaching the rear bracket to the main board. Reference: After attaching the rear bracket

41、 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 Bottom chassis assembly J J CN991 Main board Card wire Front door mechanism assembly Rear bracket MMM K Mai

42、n board Wire holder Slots Rear bracket Wires L (No.MA163)1-11 3.1.8Removing 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 assemb

43、ly, 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 N and P, apply a locking agent them. (3) Take out the front door mechanism assembly from the bo

44、t- 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 panel assembly, remove the six screws Q attaching the rear cover to the front panel as- sembly. (See Fig.14) (2

45、) 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 the rear cover assembly and switch board, be careful not to lose the spring. Fig.14 Fig.15 Fig.16 Bottom cha

46、ssis 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 1-12 (No.MA163) 3.2CD mechanism assembly section Remove the CD mechanism assembly from the main body. (See 3.1.5 Removing the CD mechanism assemb

47、ly.) 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 sections on the flexible wire before dis- connecting the flexible wire from the connector CN601 on the mechani

48、sm 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 the flexible wire from the connector CN602 on the mechanism control board. (4) Remove the solders from the s

49、oldered 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 wire 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 con