Jvc-KDSHX-705-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.MA048 2004/5 CD RECEIVER MA04820045 KD-SHX705 TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC S

2、ERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMEN

3、T . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22 5TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32

4、 Area suffix U - Other Areas KD-SHX705 PICT OK BAND SOURCE MENU BACK DISP RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA048) 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 Outpu

5、t (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 0.8% total harmonic distortion. Load Impedance4 (4 to 8 allowance) Equalizer Control RangeFrequencies60 Hz, 150 Hz, 400 Hz, 1 kHz

6、, 2.4 kHz, 6 kHz, 12 kHz Level10 dB Frequency Response40 Hz to 20 000 Hz Signal-to-Noise Ratio70 dB Line-In Level/Impedance LINE IN1.5 V/20 k load Line-Out Level/Impedance5.0 V/20 k load (full scale) Output Impedance1 k Other TerminalsSUBWOOFER OUT Changer control TUNER SECTION Frequency RangeFM87.5

7、 MHz to 108.0 MHz AM531 kHz to 1 602 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 AM TunerSensitivity20 V Selectivity65 d

8、B CD 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 MP3 (MPEG Audio Layer

9、 3)Max. Bit rate320 Kbps WMA (Windows Media Audio) Max. Bit rate192 Kbps GENERAL Power RequirementOperating 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 Size182 mm 52 mm 157 mm Panel S

10、ize188 mm 58 mm 13 mm Mass1.7 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA048)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 syst

11、em. ! 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.MA048) 1.2Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discha

12、rged, 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 electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be caref

13、ul 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 sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static

14、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, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to thei

15、r 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 destroy the laser diode. 1.3Handling the traverse unit (optical pickup) (1) Do not subject the traverse unit (optical pickup) t

16、o 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 details, refer to the replacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be carefu

17、l 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 possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it. 1.4Attention when traverse unit is decompos

18、ed *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 CD pickup unit. (If the flexible wire is disconnected without applying solder, the CD pickup may be destroyed by static electri

19、city.) 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 sheet) or iron plate Flexible wire Short-circuit point (No.MA048)1-5 1.5Important for laser products 1.CLASS 1 LASER PRODUCT 2

20、.DANGER : Invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam. 3.CAUTION : There are no serviceable 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 playe

21、r uses invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches. 5.CAUTION : If safety switches malfunction, the laser is able to fun

22、ction. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation 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 c

23、heck. WARNING LABEL CAUTION : Visible and Invisible laser radiation when open and interlock failed or defeated. AVOID DIRECT EXPOSURE TO BEAM. (e) VARNING : Synlig och osynling laserstrlning nr den ppnas och sprren r urkopplad. Betrakta ej strlen. (s) VARO : Avattaessa ja suojalukitus ohitettuna tai

24、 viallisena olet alttiina nkyvlle ja nkymttmlle lasersteilylle. Vlt steen kohdistumista suoraan itseesi. (f) ADVARSEL : Synlig og usynlig laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte eksponering til strling. (d) CLASS 1 LASER PRODUCT 1-6 (No.MA048) SECTION 2 SPECIFIC SERVI

25、CE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MA048)1-7 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

26、assembly. Fig.1 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. Fig.2 Front panel assembly Detach button Heat sink AAB 1-8 (No.MA048) 3.1.3Removing the top chassis assembly (See Figs.3 to 6) Prior to

27、 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 chassis assembly. (See Fig.3) (2) From the both and rear sides of th

28、e 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 mechanism control board from the connector CN702 on the main board. (S

29、ee 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 chassis assembly Mechanism control board Main boardCN702 CN50

30、1 Top chassis assembly Bottom chassis assemblyRear bracket D D (No.MA048)1-9 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. (1) From the both sides of the top chassis assembly, remov

31、e the two screws E attaching the front chassis. 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. (1) From the inside of the top chassis assembly, remove the three screws

32、F attaching the CD mechanism assembly. (2) Take out the CD mechanism assembly from the top chas- sis. Fig.9 Top chassis assembly Front chassis E Top chassis assembly Front chassis E Top chassis F F F CD mechanism assembly 1-10 (No.MA048) 3.1.6Removing the main board (See Figs.10 and 11) Prior to per

33、forming 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 G attaching the rear bracket to the bottom chassis assembly. (See Fig.10) (2) From the top side of the bottom chassis as

34、sembly, remove the two screws H 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 of

35、 the front door mechanism assembly. (See Fig.11) (5) Disconnect the wire from the connectors CN991 and CN992 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 3.1.7

36、Removing 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 four sc

37、rews J 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 Bottom chassis assembly G Connector Wire holderCN701 Stopper Bottom chass

38、is assembly H H CN991 Wires Main board Card wire Front door mechanism assembly CN992 Wire holder Rear bracket J J (No.MA048)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

39、 and main board. (1) From the top side of the bottom chassis assembly, remove the screw K attaching the shaft holder to the bottom chas- sis. (2) Remove the five screws L attaching the front door mecha- nism assembly to the bottom chassis. Reference: When attaching the screws M and N, apply a lockin

40、g 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.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 M

41、attaching the rear cover assembly to the front panel assembly. (See Fig.14) (2) Release the twelve joints a of the front panel assembly and remove the rear cover assembly. (See Fig.15) (3) Take out the front board from the front panel assembly. (See Fig.16) Caution: Take care not to lose the spring.

42、 Fig.14 Fig.15 Fig.16 Bottom chassis L L K Shaft holder Front door mechanism assembly M Rear cover assembly M M Rear cover assembly Joints a Joints a Front board Front panel assembly Spring 1-12 (No.MA048) 3.2CD mechanism assembly Prior to performing the following procedure Removing the CD mechanism

43、 assembly. 3.2.1Removing the front-end board (See Fig.1) (1) From the top side of the CD mechanism assembly, solder the short-circuit point on the flexible wire extending from the CD pickup. Caution: Solder the short-circuit points on the flexible wire extend- ing from the DVD pickup. If you do not

44、follow this instruc- tion, the DVD pickup may be damaged. (2) Disconnect the flexible wire from connector CN601 on the front-end board. (3) Disconnect the flexible wire from connector CN503 on the front-end board. (4) Remove the solders from two solder points a on the front- end board and disconnect

45、 the wire extending from the feed motor. (5) Remove the solders from six solder points b on the front- end board disconnect the wires extending from the spindle motor, SW board and reset SW board. (6) Remove the five screws A attaching the front-end board. Caution: Unsolder the solders from the shor

46、t-circuit points after reas- sembling. Fig.1 Feed motor Solder point a Front end board CN503 CN601 A Solder point b A A A Flexible wire Short-circuit point Spindle motor (No.MA048)1-13 3.2.2Removing the top cover (See Fig.2) (1) From the back side of the CD mechanism assembly, re- move the two screw

47、s B attaching the top cover. (2) Take out the top cover upward. Reference: When reassembling the top cover, set parts c of the top cover under the bending parts d of the chassis base. 3.2.3Removing the mechanism section (See Figs.2 to 4) Prior to performing the following procedure, remove the top co

48、ver. (1) From the front side of the CD mechanism assembly, 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 of the body. (See Fig.3) (3) Take out the mechanism section upward, and remove the three damper springs from the

49、 dampers. (See Fig.4) Caution: When reassembling the mechanism section, reattach the damper spring to the damper respectively and insert the three shafts on the bottom of the mechanism to the damp- ers. (See Fig.4) Before inserting the shaft to the dampers, apply IPA to the hole of damper. Fig.2 Fig.3 Fig.4 B Top cover Stopper Stopper C C B Parts c Parts d Chassis base Floating spring Mechanism section Damper (Purple) Damper (Black) Damper (Black) Chassis base Damper spring(F) (Silver) Da