Jvc-KWTC-410-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.MA244 2005/12 CD/CASSETTE RECEIVER MA244200512 KW-TC410,KW-TC411 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16 Area suffix UN - Indonesia RadioFans.CN 收音机爱 好者资料库 1-2 (No.MA244) SPECIFICATION Design and specification are subject to change without notice. AUDIO AMPLIFIER SECTION Maximum Power OutputFron

5、t50 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 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) E

6、qualizer 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 dB Line-Out Level/Impedance2.0 V/20 k load (full scale) Output Impedance1 k Other terminalsCD changer, AUX (auxiliary) input j

7、ack 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 ) Alternate Channel Selectivity (400 kHz)65 dB Frequency Response40 Hz to 15 000 Hz Stereo Separation30 dB Capture Ratio1.5 dB A

8、M 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 20 000 Hz Dynamic Range96 dB Signal-to-Noise Ratio98 dB Wow and FlutterLess than m

9、easurable limit MP3 Decoding Format (KW-TC411/KW-TC410 only)MPEG1/2 Audio Layer 3 Max. Bit Rate: 320 kbps WMA (Windows Media Audio) Decoding Format (KW-TC411/KW-TC410 only) Max. Bit Rate: 192 kbps CASSETTE DECK SECTION Wow and Flutter0.1 % (WRMS) Fast-Wind Time100 sec. (C-60) Frequency Response30 Hz

10、 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 System:Negative ground Allowable Operating Temperature0C to +40C Dimensions (W H D)Inst

11、allation Size (approx.)178 mm 100 mm 158 mm Set Size (approx.)178 mm 100 mm 177 mm Mass (approx.)2.3 kg (excluding accessories) RadioFans.CN 收音机爱 好者资料库 (No.MA244)1-3 SECTION 1 PRECAUTIONS 1.1Safety Precautions ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pa

12、y 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.MA244) 1.2Preventing static electricity Electrostatic discharge (ESD), which oc

13、curs 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 electricity Static electricity in the work area can destroy t

14、he 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) or an iron plate over it before placing the traver

15、se 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 sides of the laser diode on the replacement optical

16、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 destroy the laser diode. 1.3Handling the traverse unit (

17、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 details, refer to the replacement procedure in the text.

18、 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 to adjust the semi-fixed resistor that adjusts the l

19、aser 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 pickup unit. (If the flexible wire is disconnected wi

20、thout 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 sheet) or iron plate Pickup Short-circuit point (Solder

21、ing) Flexible wire (No.MA244)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 serviceable parts inside the Laser Unit. Do not disassemble the Laser Uni

22、t. 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 interlocks have failed or are defeated. It is dangerous to defeat

23、 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 exposure. REPRODUCTION AND POSITION OF LABELS ! Please use enoug

24、h 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) VARNING : Synlig och osynling laserstrlning nr den ppnas och sp

25、rren 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 laserstrling nr maskinen er ben eller interlocken fejeler. Undg direkte

26、eksponering til strling. (d) CLASS 1 LASER PRODUCT 1-6 (No.MA244) 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 manual CDS-802JE3 No.M

27、Y002. (No.MA244)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 remove the front panel a

28、s- 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.MA244) 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. (See Fig.3.) (2) Remove t

29、he 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 bracket (See Fig.4) Remo

30、ve the heat sink. (1) From the back side of the main body, remove the six 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 assembly, heat sink and re

31、ar 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 body in the holes of the bott

32、om 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.MA244)1-9 3.1.5Removing the cassette mechanism control board (See Fig.6) Remove the front panel assembly, heat sink, rear bracket and bottom chassis

33、 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 screws G attaching the casset

34、te 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 control board. After attaching

35、 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 assembly, discon- nect th

36、e 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 the cassette mechanism cont

37、rol 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.MA244) 3.1.7Removing the fun

38、c 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 main body. 3.1.8Removing th

39、e 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 main board on the middle ch

40、assis 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 chassis assembly, discon- nect t

41、he 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 holes of the main board. Fi

42、g.9 Main board Func board CN705 CN321 Middle chassis assembly KK J Main board Middle chassis e e M M M CN323 (No.MA244)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 middle chassis assembly. (1)

43、 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 remove the joint g in the dire

44、ction 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, remove the three screws P at

45、taching 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 board CN601 N N N g f Top

46、chassis assembly CD mechanism assembly P P hh Top chassis assembly 1-12 (No.MA244) 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 thir- teen screws Q attaching the switch board. (2) Remove the volume knob from th

47、e 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 assemb

48、ly Switch board j Volume knob Front panel assembly Q (No.MA244)1-13 SECTION 4 ADJUSTMENT 4.1Adjustment method ? ? Test instruments required for adjustment (1) Digital oscilloscope (100MHz) (2) Frequency counter meter (3) Electric voltmeter (4) Wow leave all servicing to qualified service personnel.

49、3. CAUTION: Visible and invisible laser radiation when open and interlock failed or defeated. Avoid direct exposure to beam. 4. REPRODUCTION OF LABEL: CAUTION LABEL, PLACED OUTSIDE THE UNIT. Caution on volume setting: Discs produce very little noise compared with other sources. Lower the volume before playing a disc to avoid damaging the speakers by the sudden increase of the output level. How to forcibly eject a disc If a disc cannot be recognized or cannot be ejected, eject the dis