Jvc-KWXC-407-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.MA235 2005/12 CD/CASSETTE RECEIVER MA235200512 KW-XC400,KW-XC407 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . .

2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13 5TROUBLESHOOTING . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 KW-XC400 KW-XC407 Area suffix J - Northern America KW-XC400 Area suffix KW-XC407 EE - Russian Federation RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA235) SPECIFICATION KW-XC400 Design and specification

5、s are subject to change without notice. AUDIO AMPLIFIER SECTION Power Output18 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 RangeLow12 dB (60 Hz, 80 Hz, 100 Hz, 120 Hz) Mid12 dB High12 dB (8 kHz, 10

6、kHz, 12 kHz, 15 kHz) Frequency Response40 Hz to 20 000 Hz Line-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k Other TerminalsCD changer, AUX (auxiliary) input jack, Steering wheel remote input TUNER SECTION Frequency RangeFM87.5 MHz to 107.9 MHz (with channel interval set to 100

7、 kHz or 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 ) Alternate

8、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 channels (

9、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 Rate: 192 kbps CASSETTE DECK SECTION Wow and Flutter0

10、.1 % (WRMS) Fast-Wind Time100 sec. (C-60) Frequency Response30 Hz to 16 000 Hz (Normal tape) Signal-to-Noise Ratio (Normal tape) Dolby B NR ON65 dB Dolby B NR OFF56 dB Stereo Separation40 dB GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNegative ground

11、Allowable Operating Temperature0C to +40C (32F to 104F) Dimensions (W H D)Installation Size (approx.)178 mm 100 mm 158 mm (7-1/16 3-15/16 6-1/4) Set Size (approx.)178 mm 100 mm 175 mm (7-1/16 3-15/16 6-15/16) Mass (approx.)2.3 kg (5.1 lbs) (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA235)1-

12、3 KW-XC407 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) Front19 W per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total har- monic distortion. Rear19 W

13、 per channel into 4 , 40 Hz to 20 000 Hz at no more than 0.8% total har- monic distortion. 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 Signal-to-Noise Ratio70

14、 dB Line-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k Other terminalsCD changer, AUX (auxiliary) input jack TUNER SECTION Frequency RangeFM87.5 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 )

15、 Alternate Channel Selectivity (400 kHz) 65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 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 Channels

16、2 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 Rate: 192 kbps CASSETTE DECK SECTION Wow

17、and Flutter0.1 % (WRMS) Fast-Wind Time100 sec. (C-60) Frequency Response30 Hz to 16 000 Hz (Normal tape) Signal-to-Noise Ratio (Normal tape) Dolby B NR ON65 dB Dolby B NR OFF56 dB Stereo Separation40 dB GENERAL Power RequirementOperating VoltageDC 14.4 V (11 V to 16 V allowance) Grounding SystemNega

18、tive ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Installation Size (approx.)178 mm 100 mm 158 mm Set Size (approx.)178 mm 100 mm 175 mm Mass (approx.)2.3 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 1-4 (No.MA235) SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs forme

19、d 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 it in case of an adjustment or operation check. (No.MA235)1-5 1.2Preventing static

20、 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 electrici

21、ty 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 conductive sheet

22、) 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, both

23、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 easily dest

24、roy 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 specific deta

25、ils, 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 possible

26、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 the CD p

27、ickup 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 (conductive she

28、et) or iron plate Pickup Short-circuit point (Soldering) Flexible wire 1-6 (No.MA235) SECTION 2 SPECIFIC SERVICE INSTRUCTIONS 2.1CD mechanism and Cassette mechanism For the CD mechanism, please refer the mechanism manual TN2001-1013 (No.MY001). For the Cassette mechanism, please refer the mechanism

29、manual CDS-802JE3 (No.MY002). (No.MA235)1-7 SECTION 3 DISASSEMBLY 3.1Main body section 3.1.1Removing the front panel assembly (See Figs.1 and 2) (1) From the both side of the main body, remove the two screws A attaching the front panel assembly. (See Figs.1 and 2.) (2) Release the four joints a and

30、remove the front panel as- sembly in the direction of the arrow. (See Figs.1 and 2.) Fig.1 Fig.2 Front panel assembly a A Front panel assembly a A 1-8 (No.MA235) 3.1.2Removing the heat sink (See Figs.3 and 4) (1) From the back side of the main body, remove the six screws B attaching the heat sink. (

31、See Fig.3.) (2) Remove the heat sink from the main body. Note: Before attaching the heat sink, attach the cooling rubbers on the power amplifier IC. (See Fig.4) When attaching the heat sink, set the projections b on the rear bracket in the holes of the heat sink. (See Fig.3.) 3.1.3Removing the rear

32、bracket (See Fig.4) Remove the heat sink. (1) From the back side of the main body, remove the seven screws C, two screws D and screw E attaching the rear bracket. (2) Remove the rear bracket from the main body. Fig.3 Fig.4 3.1.4Removing the bottom chassis assembly (See Fig.5) Remove the front panel

33、assembly, heat sink and rear bracket. (1) From the bottom side of the main body, remove the four screws F attaching the bottom chassis assembly. (2) Take out the bottom chassis assembly from the main body. Reference: When attaching the bottom chassis assembly, set the projec- tions c of the main bod

34、y in the holes of the bottom chassis as- sembly. Fig.5 B B B bb Rear bracket Heat sink CD CE C C Rear bracket Cooling rubbers Power amplifier IC Bottom chassis assembly c FF (No.MA235)1-9 3.1.5Removing the cassette mechanism control board (See Fig.6) Remove the front panel assembly, heat sink, rear

35、bracket and bottom chassis assembly. (1) From the inside of the bottom chassis assembly, discon- nect the card wire from the connector CN403 on the cas- sette mechanism control board. (2) Disconnect the wire from the connector CN402 on the cas- sette mechanism control board. (3) Remove the three scr

36、ews G attaching the cassette mech- anism control board. (4) Take out the cassette mechanism control board from the bottom chassis assembly. Reference: When attaching the cassette mechanism control board, set the projections d of the bottom chassis assembly in the holes of the cassette mechanism cont

37、rol board. After attaching the cassette mechanism control board, fix the wire with the wire clamp as before. Fig.6 3.1.6Removing the cassette mechanism assembly (See Fig.7) Remove the front panel assembly, heat sink, rear bracket and bottom chassis assembly. (1) From the inside of the bottom chassis

38、 assembly, discon- nect the card wire from the connector CN403 on the cas- sette mechanism control board. (2) Disconnect the wire from the connector CN402 on the cas- sette mechanism control board. (3) Remove the four screws H attaching the cassette mecha- nism assembly. Reference: After attaching t

39、he cassette mechanism control board, fix the wire with the wire clamp as before. Fig.7 G G d d dCN403CN402 Wire clamp Cassette mechanism control board Bottom chassis assembly CN403 CN402 Wire clamp Cassette mechanism control board Bottom chassis assembly H H H Cassette mechanism assembly 1-10 (No.MA

40、235) 3.1.7Removing the func board (See Fig.8) Remove the front panel assembly, heat sink, rear bracket and bottom chassis assembly. (1) From the bottom side of the main body, disconnect the wire from the connector CN321 on the func board. (2) Remove the screw J and take out the func board from the m

41、ain body. 3.1.8Removing the middle chassis assembly (See Fig.8) Remove the front panel assembly, heat sink, rear bracket and bottom chassis assembly. (1) From the bottom side of the main body, remove the four screws K attaching the middle chassis assembly. (2) Disconnect the connector CN705 of the m

42、ain board on the middle chassis assembly from the CD mechanism assem- bly in an upward direction. Fig.8 3.1.9Removing the main board (See Fig.9) Remove the front panel assembly, heat sink, rear bracket, bot- tom chassis assembly and middle chassis assembly. (1) From the top side of the middle chassi

43、s assembly, discon- nect the wire from the connector CN323 on the main board. (2) Remove the four screws M attaching the main board on the middle chassis. (3) Remove the main board from the middle chassis. Reference: When attaching the main board, set the projections e of the middle chassis in the h

44、oles of the main board. Fig.9 Main board Func board CN705 CN321 Middle chassis assembly KK J Main board Middle chassis e e M M M CN323 (No.MA235)1-11 3.1.10 Removing the CD mechanism control board (See Fig.10) Remove the front panel assembly, heat sink, rear bracket, bot- tom chassis assembly and mi

45、ddle chassis assembly. (1) From the inside of the top chassis assembly, disconnect the card wire from the connector CN601 on the CD mech- anism control board. (2) Remove the five screws N attaching the CD mechanism control board. (3) Lift the CD mechanism control board to remove the joint f and remo

46、ve the joint g in the direction of the arrow. Fig.10 3.1.11 Removing the CD mechanism assembly (See Fig.11) Remove the front panel assembly, heat sink, rear bracket, bot- tom chassis assembly, middle chassis assembly and CD mechanism control board. (1) From the inside of the top chassis assembly, re

47、move the three screws P attaching the CD mechanism assembly. (2) Take out the CD mechanism assembly from the top chas- sis. Reference: When attaching the CD mechanism assembly, set the projec- tions h of the top chassis assembly in the holes of the CD mechanism assembly. Fig.11 CD mechanism control

48、board CN601 N N N g f Top chassis assembly CD mechanism assembly P P hh Top chassis assembly 1-12 (No.MA235) 3.1.12 Removing the switch board (See Fig.12) Remove the front panel assembly. (1) From the inside of front panel assembly, remove the eight screws Q attaching the switch board. (2) Remove th

49、e volume knob from the front side of the front panel assembly in the direction of the arrow while lifting the switch board little by little. (3) Release the sections j while extending the lower section of the front panel assembly in the direction of the arrow and take out the switch board. Fig.12 Q QQ Front panel assembly Switch board j Volume knob Front panel assembly (No.MA235)1-13 SECTION 4 ADJUSTMENT 4.1Adjustment method ? ? Test instruments required for adjustment (1) Digital oscilloscope (100MHz) (2) Frequency