Jvc-KSFX-230-Service-Manual(1) 电路图 维修手册.pdf

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1、KS-FX230 1-1 SERVICE MANUAL CASSETTE RECEIVER No.49565 Jul. 2000 COPYRIGHT 2000 VICTOR COMPANY OF JAPAN, LTD. KS-FX230 KS-FX230 Area Suffix UF - China Contents Safety precaution1-2 Disassembly method1-3 Adjustment method1-9 Description of major ICs1-12 This service manual is printed on 100% recycled

2、 paper. MO/RNDSCAN/RPT SOUND LOUD DISP PROGBAND Multi Music Scan CD CHANGER CONTROL SELSSM 789101112 123456 40WX4 /I ATT CD-CHTUNERTAPE KS-FX230 RadioFans.CN 收音机爱 好者资料库 KS-FX230 1-2 ! Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in

3、 the case of preforming repair of this system. Safety precaution RadioFans.CN 收音机爱 好者资料库 KS-FX230 1-3 Disassembly method 1. Disengage the four tabs in the right and left side of unit and pull the front chassis forward to remove it. Removing the front chassis (see Fig.1) Removing the bottom cover and

4、 heat sink (see Fig.2,3) Removing the main board (see Fig.4) Removing the rear panel (see Fig.4) Removing the mechanism assy (see Fig.5) Removing the front panel unit (see Fig.6) 1. 2. 3. Remove one screw A retaining the IC to the heat sink. Remove two screws B to remove the heat sink. Turn the upsi

5、de down, the insert and turn the screwdriver to remove the bottom cover and protect sheet. 1. 2. 3. Remove two screws C retaining the rear panel to the chassis. Remove two screws D retaining the main board. Lift up the main board to remove it. At this time, remove the connector CP702 connecting the

6、main board and mechanism assembly. 1. 2. 3. 4. Remove six screws retaining the jacks or the like. Remove two screws E to the 16-pin jack. Remove one screw F to remove the line-out jack. Remove one screw G to remove the antenna jack. Remove one screw H to remove the changer controller jack. 1. 2. 3.

7、Remove four mechanism mounting screws I retaining the mechanism assembly. Remove four screws J retaining the cover. Remove one screw which is the fixation of top cover and the substrate. 1. Remove four screws K retaining the rear cover. Front chassis Fig. 1 Bottom cover Fig. 2 Heat sink Left side vi

8、ew Fig. 3 Main board CP702 Connection to the mechanism connector position Fig. 4 A BB D C E H F G C Fig. 6 Mechanism assy Fig. 5 JJ JJ KK KK RadioFans.CN 收音机爱 好者资料库 KS-FX230 1-4 1. 2. 3. 4. Desolder the lead wires of the loading motor at the 2 positions shown (Red and Black). Desolder the lead wire

9、of the head at the 3 positions shown (RED, Yellow and Black). Remove the three screws A securing the head relay board. Shift the interlocking section a securing the head relay board in the direction shown by the arrow to remove the board. Removing the head relay board (see Fig.1) Removing the load a

10、rm assy (see Fig.2) Removing the cassette holder and arm assy (see Fig.3) Removing the sub chassis assy (see Fig.4) 1. 2. 3. Shift the load arm assy counter clockwise. Remove the load arm assy from the catch. Using tweezers, detach the mylar washer 1 securing the load arm assy and pull out the load

11、arm assy. NOTE : When reassembling, be sure to use a new mylar washer. 1. 2. 3. 4. 5. Remove the head relay board. Remove the load arm assy. Apply DC 6V to the lead wire of the loading motor assy and turn the load gear assy to the position shown in Fig. 3. Remove the screw B securing the cassette ho

12、lder and holder arm assy. Shift the cassette holder and holder arm assy in the direction shown by the arrow and remove them from the interlocking section b of the sub chassis assy. 1. 2. 3. 4. Remove the head relay board. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remo

13、ve the two screw C and D securing the sub chassis assy. NOTE : When removing the sub chassis assy, the mode gear may become detached. In this case, set it back to the original position. Red Red Black Black YellowHead relay board Fig. 1 A AA a Catch Load arm assy Fig. 2 1 Apply DC 6V Fig. 3 Loading m

14、otor assy Loading gear assy Sub chassis assy Cassette holder Holder C D b B KS-FX230 1-5 1. 2. 3. 4. 5. 6. Remove the head relay board. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remove the sub chassis assy. Disengage the spring holding the play head down. Remove the t

15、wo screws E securing the play head. Removing the play head (see Fig.4) Removing the pinch roller assy (see Fig.5,6) Removing the reel disk assy (see Fig.7) 6. Pull out the pinch rollers. 1. 2. 3. 4. 5. Remove the head relay board. Remove the load arm assy. Remove the cassette holder and holder arm a

16、ssy. Remove the sub chassis assy. Detach the mylar washers c at the two positions securing the right and left pinch roller assy. 1. 2. 3. 4. 5. Remove the head relay board. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remove the sub chassis assy. Detach the mylar washer

17、d from the tip by first pressing down the reel feather to expose it. NOTE : When reassembling, be sure to use a new mylar washer NOTE : When reassembling, be sure to use new mylar washers. Also, make sure that grease is not adhering to the pinch rollers. Play head Spring Fig.4 Pinch roller assy Fig.

18、5 Sub chassis Pinch roller assy Fig.6 Fig.7 Reel feather push Reel disk assy E c E c d KS-FX230 1-6 1. 2. 3. 4. 5. 6. 7. 8. 9. Remove the head amp PCB. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remove the sub chassis assy. Remove the right and left pinch roller assy.

19、From the rear of the head plate, detach the mylar washer e and the washer pressing the forward/ reverse plate down. (see Fig. 8) Remove the screw F fixing the metal detection lever and removal spring as shown in Fig. 8. Remove the head plate. Pull out the mode gear. (see Fig. 9) Removing the head pl

20、ate (see Fig. 8,9) 1. 2. 3. 4. 5. 6. 7. 8. Remove the head relay PCB. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remove the sub chassis assy. Remove the head plate. Disengage the main belt from the flywheel assy. (see Fig. 8) Remove E washers f at the two positions whi

21、ch secure the capstan shaft away from the surface. (see Fig. 9) Pull out the flywheel assy from the rear. Removing the flywheel assy (see Fig. 9) 1. 2. 3. 4. 5. 6. 7. Remove the head relay PCB. Remove the load arm assy. Remove the cassette holder and holder arm assy. Remove the sub chassis assy. Str

22、aighten the curved tab g securing the reel disk PCB. (see Fig. 10) Remove the two screws G fixing the reel disc PCB. Remove the reel disk PCB. Removing the reel disk PCB (see Fig. 10) NOTE : When installing the mode gear, set it to the arrow mark. Forward/reverse plate Spring Metal tape detection le

23、ver Main belt Fig.8 Head plate Capstan shaft Marking Mode gear Fig.9 Reel desk PCB Fig.10 e F f f g G KS-FX230 1-7 NOTE : When reassembling, be sure to use a new mylar washer. 1. 2. 3. Remove the head relay assy. Remove the load arm assy. Remove the Mylar washer h fixing the worm gear. (see Fig.11)

24、4. 5. Remove the screw H fixing the loading motor assy. (see Fig.11) Remove the two screws I fixing the loading motor assy. (see Fig 11) NOTE : The set arm assy and the mode gear should be positioned as shown in Fig.12. 3. Attach the cassette holder as shown in Fig.13. In this case, first pass the t

25、ab of the section i through the mechanism j, then attach the cassette holder in the direction shown by the arrow. Removing the loading motor assy (see Fig. 11) (Procedures for reassembling) 1. 2. Insert the mode gear into the sub chassis assy. Install the sub chassis assy and secure it with the two

26、screws C and D as shown in Fig.12. Loading motor assy Worm gear Motor bracket H h I Sub chassis assy Fig.11 C D Sub chassis assy Mode gear Set arm assy Fig.12 Cassette holder i j Fig.13 KS-FX230 1-8 4. Set the catch to the holder arm assy as shown in Fig.14. 5. 6. 7. While attaching the holder arm a

27、ssy to the cassette holder, insert the shaft of the holder arm assy into the interlocking section k of the sub chassis assy as shown in Fig.15. Install the spring attached to the folder arm assy shaft over the set arm assy as shown in Fig.16. After the holder arm assy is installed, secure it with th

28、e screw B. (see Fig.15) 8. 9. 10. After the installation, apply DC 6V to the lead wires of the loading motor assy to locate the load gear assy as shown in Fig.17. Install the load arm assy. Install the head relay PCB. 11.Solder the loading motor and head lead wires to the head relay PCB, respectivel

29、y. (see Fig.19) NOTE : Install it so that the slide switch lever of the head relay PCB is set in the PCB stay hook of the sub chassis assy. (see Fig.18) Holder arm assy Cassette holder Refer to Fig.16 Apply DC 6V Catch Holder arm assy Fig.14 B k Holder arm assy Spring Set arm assy Fig.15 Fig. 16 Fig

30、. 17 Loading motor Head PCB Fig.19 Slide switch PCB stay Fig.18 KS-FX230 1-9 Adjustment method Electoronic voltmeter Audio frequency osillator (range ; 50 20kHz and outp ut 0 dB with impedance of 660 ) Attenuator (impedance;600 ) Frequency counter AM Standard signal generator FM Standard signal gene

31、rator Wow flutter mater Torqu testing cassette gauge CTG N (mechanical adjusting) TW 2111A (FWD play) TW 2121A (REV play) Standard tape VT712 or VTT712 (tape speed,wow 10.5V) Load 4 (4-speakers connection) BASS / TRE,FADER Indication 0 Main volume Position with an output level of 2V during VT721 pla

32、yback Condition for measurement FM ; 400Hz,22.5kHz deviation (MONO) FM STEREO ; 1kHz,6.5kHz deviation, pilotsignal 7.5kHz,66dB V AM ; 400Hz,30% modulation,74dB V Output impedznce ; 50 Tuner section Dummy antenna Preset Memory Initialization Preset Memory Band M1 87.5 531 M2 89.9 603 M3 97.9 999 M4 1

33、05.9 1404 M5 108.0 1602 M6 87.5 531 FM(MHz) AM(kHz) For ver.U Manual Tuning Up/Down Frequency FM: 50kHz AM: 9kHz 104.5 60 FM SSG 50 SSG Level 66dB Coaxial Cable Plug to fit antenna jack FM DUMMY ANTENNA AM DUMMY ANTENNA Input Level 60dB 15pF 30 AM SSG 50 SSG Level 74dB Coaxial Cable Plug to fit ante

34、nna jack Metal shield must be attached to plug 60pF KS-FX230 1-10 For 1995 and 1996,were advancing efforts to make our extension cords common for all Car Stereo products. Please use this type of extension cord as follows. As a U shape type top cover is employed,this type of extension cord is needed

35、to check operation of the mechanism assembly after disassembly. Extension cords Disassembly method (Refer to method to remove main parts) Connection diagram EXT KSRT002 18P (18 pin extension cord) For connection between mechanism assembly and main PCB assembly. Check for mechanism-driving section su

36、ch as motor, etc. Remove the bottom cover. Remove the front panel assembly. Remove the top cover. (Remove the screws at each side of heat sink and rear panel.) Install the front panel (whose assembly was removed in step 2) to the main unit. Confirm that current is being carried by connecting an exte

37、nsion cord jig. 1. 2. 3. 4. 5. Extension cord Mechanism assembly Front panel assembly KS-FX230/KS-F130 Main board assembly Available to connect to the CN701 connector when installing the front panel. KS-FX230 1-11 ItemConditionsAdjustment and Confirmation methodsS.ValuesAdjust Head azimuth adjustmen

38、t Head height adjustment Adjust the azimuth directly. When you adjust the height using a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment. Load the SCC-1659 mirror tape. Adjust with height adjustment screw A an

39、d azimuth adjustment screw B so that line A of the mirror tape runs in the center between Lch and Rch in the reverse play mode. After switching from REV to FWD then to REV, check that the head position set in procedure 1 is not changed. (If the position has shifted, adjust again and check.) Adjust w

40、ith azimuth adjustment screw B so that line B of the mirror tape runs in the center between Lch and Rch in the forward play mode. Test tape: SCC-1659 VT703(10kHz) Test tape: VTT712 (3kHz) Test tape: VTT724 (1kHz) VTT739 (63Hz / 1kHz / 10kHz) 1. Tape speed and wow flutter confirmation 2. Play back fr

41、equency response confiramation 3. 1. 2. 3. Check to see if the reading of the F, counter / wow flutter meter is within 3015 3045(FWD / REV), and less than 0.35% (JIS RMS). In case of out of specification, adjust the motor with a built-in volume resistor. 1. 2. Play test tape VTT724, and set the volu

42、me position at 2V. Play test tape VTT739 and confirm. 1kHz / 10kHz: -1 3dB, 1kHz / 63Hz: 0 3dB, When 10kHz is out of specification, it will be necessary to read adjust the azimuth. 1. 2. 3. Load VTT724 (VT724) (1kHz) and play it back in the reverse play mode. Set the Rch output level to max. Load VT

43、T703 (VT703) (10kHz) and play it back in the forward play mode. Adjust the Rch and Lch output levels to max, with azimuth adjustment screw B. In this case, the phase difference should be within 45 . Engage the reverse mode and adjust the output level to max, with azimuth adjustment screw C. (The pha

44、se difference should be 45 or more.) When switching between forward and reverse modes, the difference between channels should be within 3dB. (Between FWD L and R, REV L and R.) When VTT721 (VT721) (315Hz) is played back, the level difference between channels should be within 1.5dB. 1. 2. 3. 4. 5. He

45、ad azimuth adjustment Tape speed: 3015 3045Hz Wow flutter: less than 0.35% Speaker out 1kHz / 63Hz : 0 3db 1kHz / 10kHz : -1 3db Built-in volume resistor The tuner section is of an adjustment-freedesign. In case the tuner is in trouble, replace the tuner pack. A line B line Head shield PBHead FWD Ad

46、j B REV Adj CHEIGHT Adj A phase (0 )(45 ) Head shield The head is at low position during. The head is at High position during REV. Output level: Maximum KS-FX230 1-12 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 SDA GND OUTLR OUTLF TL B2L B1L IVL ILL QSL IDL

47、 MUTE ICL IMD IBL IAL SCL VCC OUTRR OUTRF TR B2R B1R IVR ILR QSR IDR Vref ICR CAP IBR IAR CD-CH TAPE TUNER POWER SUPPLY SOURCE SELECTOR VOLUME 1 +20 to -31 dB LOUDNESS LEFT BASS LEFT +15 dB TREBLE LEFT +12 dB BASS RIGHT +15 dB TREBLE RIGHT +12 dB MUTE FUNCTION ZERO CROSS DETECTOR VOLUME 2 0 to 55 dB

48、 BALANCE FENDER REAR VOLUME 2 0 to 55 dB BALANCE FENDER FRONT HC BUS REC VOLUME 2 0 to -55dB BALANCE FENDER FRONT VOLUME 2 0 to -55dB BALANCE FENDER REAR VOLUME 1 +20 to -31 dB LOUDNESS RIGHT LOGIC 21 31 2 19 16 15 13 11 22 20 18 17 14 23252426 2728 30 29 1 32 3 4 108976512 1.Pin layout 3.Pin functi

49、ons 2.Block diagram 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pin No. Pin No. 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 SDA GND OUTLR OUTLF TL B2L B1L IVL ILL QSL IDL MUTE ICL IMO IBL IAL Serial data input/output. Ground. output left rear. output left front. Treble control capacitor left channel or input from an external equalizer. Bass control capacitor left channel or output to an external equal