Jvc-KSFX-915-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL CASSETTE RECEIVER No.49613 Feb. 2001 COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD. KS-FX915R/KS-FX815 KS-FX915R/KS-FX815 MO TP TP RDSRDS PTYPTY DISPDISP 891011127 DAB MO DISPDISP SCANSCAN LOUDLOUD 891011127 KS-FX915R KS-FX815 KS-FX815 KS-FX915R Area Suffix EE Russian Federation Content

2、s Safety precaution1- 2 Location of main parts1- 3 Disassembly method1- 4 Adjustment method Description of major ICs1-14 1-11 Difference point KS-FX915R KS-FX815 Dimmer BeepRDSLCDRemocon O X Color Nega O X O X O X RadioFans.CN 收音机爱 好者资料库 KS-FX915R/KS-FX815 1-3 Location of main parts Control unit Dis

3、play Control unit Main unit Main board Main board assembly Power IC Connector to controller Tuner pack Antenna jack RCA jack Changer control connector I/O connector Cassette mechanism Main board assembly Connector to controller Cassette mechanism C.motor assembly Mechanism control board assembly Cas

4、sette housing Head Head relay board Mechanism control board assembly Flywheel assemblyReel board Capstan motor assembly RadioFans.CN 收音机爱 好者资料库 KS-FX915R/KS-FX815 1-4 Disassembly method Removing the front chassis (See Fig.1) 1. Remove two screws A and insert a screwdriver to the joints a on the side

5、 of the front chassis and two joints b on the right side, then detach the front chassis toward the front side. Removing the heat sink (See Fig.2 ) 1. Remove the three screws B attaching the heat sink on the left side of the body, and remove the heat sink. Removing the bottom cover (See Fig.3 ) 1. 2.

6、 Turn the body upside down. Insert a screwdriver to the two joints c and two joints d on both sides of the body and the joint e on the back of the body, then detach the bottom cover from the body. Fig.1 Fig.2 Front chassis b a a b Heat sink B B B Fig. 3 Regulator board e d c A A RadioFans.CN 收音机爱 好者

7、资料库 KS-FX915R/KS-FX815 1-5 Removing the main amplifier board assembly (See Fig.4 and 5) 1. 2. 3. 4. 5. Remove the front chassis. Remove the bottom cover. Remove the two screws C attaching the main amplifier board assembly on the bottom of the body. Remove the three screws D attaching the main amplif

8、ier board assembly on the back of the body. Disconnect connector CP401 on the main amplifier board assembly from the cassette mechanism assembly. Removing the Cassette mechanism assembly (See Fig.6 ) 1. 2. 3. 4. Remove the front chassis. Remove the bottom cover. Remove the main amplifier board assem

9、bly. Remove the four screws E attaching the Cassette mechanism assembly from the top cover. Removing the control switch board (See Fig.7 and 8 ) 1. 2. 3. Remove the front chassis. Remove the four screws F attaching the rear cover on the back of the front panel unit. Remove the control switch board f

10、rom the front panel unit. Fig. 5 D D FF FF Fig. 7 Fig. 8 Control switch board E Fig. 6 E Fig.4 C C Main amplifier board CP401 KS-FX915R/KS-FX815 1-6 For the 6pin wire extending from connector CN402 on the head amplifier board, disconnect it from the head relay board. Disconnect the card wire from co

11、nnector CN403 on the head amplifier board. Remove the screw A attaching the head amplifier board. Move the tab a as shown in Fig.2 and remove the head amplifier board while moving it in the direction of the arrow. 1. 2. 3. 4. Removing the head amplifier board. (See Fig.1 and 2) Disconnect the 6pin w

12、ire from connector CN402 and the card wire from CN403 on the head amplifier board (Refer to Fig.1 and 2). Remove the four screws B on the bottom of the cassette mechanism. 1. 2. Removing the cassette mechanism assembly (See Fig.1 to 3) Fig.1 Cassette mechanism assy Head relay board 6pin wire CN402 C

13、N403 CN402 Head amplifier board Fig.2 Tab a Head amplifier board Fig.3 Cassette mechanism assy B B A Head amplifier board CN403 KS-FX915R/KS-FX815 1-7 Unsolder the soldering b on the head relay board. Remove the screw C attaching the head relay board. Remove the head relay board in the direction of

14、the arrow while releasing the two joints c. 1. 2. 3. Removing the head relay board (See Fig.4) Remove the E washer attaching the load arm using a pincette or something like that and remove the spring d. Move the part of the load arm marked upwards to release it from the axis of rotation. Then rotate

15、 the load arm in the direction of the arrow to remove it from the cach. 1. 2. Removing the load arm (See Fig.5) Prior to performing the following procedure, remove the head relay board. Remove the screw D attaching the sub chassis. Push the tab e in the direction of the arrow to detach the one side

16、of the sub chassis. Then release the sub chassis from the tab f. 1. 2. Removing the sub chassis (See Fig.6) Prior to performing the following procedure, remove the head relay board, the load arm and the sub chassis. Remove the screw E attaching the reinforce bracket. Remove the reinforce bracket. Pu

17、sh the tab g fixing the cassette holder in the direction of the arrow and open the cassette holder and the holder arm upward until they stop at an angle of 45 degrees. Move the two joints h to the side and remove the cassette holder and the holder arm from the shaft. 1. 2. 3. Removing the cassette h

18、older and the holder arm in the eject mode (See Fig.7 and 8) Fig.4C Soldering b Joint c Fig.6 Tab f D Tab e Cach Head relay board Head relay board Fig.7 Reinforce bracket Reinforce bracket E Cassette holder Sub chassis Head relay board Joint h Holder arm Load arm Joint h tab g Fig.5 Spring d Load ar

19、m E washer Cassette mecha chassis KS-FX915R/KS-FX815 1-8 Prior to performing the following procedure, remove the head relay board and the sub chassis. Remove the two screws F attaching the play head (The spring under the play head comes off at the same time). 1. Removing the play head (See Fig.9) Pr

20、ior to performing the following procedure, remove the head relay board and the sub chassis. Push each tab i in the direction of the arrow and pull out the pinch rollers on both sides. 1. Removing the pinch roller assy (See Fig.9) Unsolder the soldering j on the reel disc board. Push the seven tabs k

21、 on the bottom of the cassette mechanism assembly in the direction of the arrow. 1. 2. Removing the reel disc board (See Fig.10) Unsolder the two soldering l of the motor and the sub motor. Release the sub motor from the three tabs m. Push the sub motor upward and pull out it. Remove the belt on the

22、 bottom of the cassette mechanism assembly and remove the two screws G attaching the motor. 1. 2. 3. Removing the motor and the sub motor (See Fig.10 and 11) The motors can be detached before removing the load arm. ATTENTION: Fig.8 Cassette holder and holder arm Joint h Shaft Shaft Joint h Fig.9 Tab

23、 i Pinch roller assyPinch roller assy F Play head Spring Fig.11 Sub motor Tab m Load arm Motor Soldering l Tab m Soldering l Tab m Soldering j Pinch roller assy Tab i Tab i Tab i Fig.10 Cassette mechanism assy Tabs k Reel disc board Soldering j Tabs k G G Motor Belt Flyhwheel KS-FX915R/KS-FX815 1-9

24、Prior to performing the following procedure, remove the head relay board, the load arm, the sub chassis, the cassette holder, the holder arm and the reel disc board. Remove the belt on the bottom of the cassette mechanism assy. Remove the slit washer attaching the flywheel on the upper side of the c

25、assette mechanism assy and pull out the flywheel downward. Then remove another flywheel in the same way. 1. 2. 3. Removing the flywheel (See Fig.10 and 12) Prior to performing the following procedure, remove the head relay board, the load arm, the sub chassis, the cassette holder and the holder arm.

26、 Disengage the part n inside of the reel driver which engages with the shaft, using a pincette or something like that. Then remove the reel driver from the shaft. Remove the reel driver spring and the reel table. 1. 2. Removing the reel disc assy( ) (See Fig.12 to 14) When reassembling, make sure to

27、 use a new slit washer. ATTENTION: Fig.10 Cassette mechanism assy Tab k Reel disc board Soldering j Tab k G G Motor Belt Flyhwheel Fig.12 Plate The part n Reel driver Reel disc assy( ) Push aside the gear Tabs o Reel disc assy( ) The part n Reel driver Tab o Fig.13 Reel driver Shaft The part n Fig.1

28、4 Reel driver spring Reel table Slit washer Slit washer KS-FX915R/KS-FX815 1-10 Release the plate from the three tabs o. Push aside the gear over the reel table using a pincette or something like that. Remove the reel disc assy ( ) as with the reel disc assy ( ). 1. 2. 3. Removing the reel disc assy

29、( ) (See Fig.12 to 15) Do not break the front panel tab fitted to the metal cover. ATTENTION: Prior to performing the following procedure, remove the reel disc ( ). ATTENTION: Fig.15 Push aside the gear and reattach the reel disc Assy( ). Reel disc assy( ) KS-FX915R/KS-FX815 1-11 Adjustment method 1

30、.Digital osclloscope(100MHz) Measuring conditions(Amplifier section) Power supply voltage Load impedance Line out Standard volume position Balance and Bass,Treble volume .Fader :Center(Indication0) Loudness,Dolby NR,Sound,Cruise:Off Volume position is about 2V at speaker output with following condit

31、ions.Playback the test tape VT721. AM mode 999kHz/62dB,INT/400Hz,30% modulation signal on receiving. FM mono mode 97.9MHz/66dB,INT/400Hz,22.5kHz deviation pilot off mono. FM stereo mode 1kHz,67.5kHz dev. pilot7.5kHz dev. Output level 0dB(1 V,50 /open terminal). for DOLBY level measurement For playba

32、ck frequency measurement For wow flutter & tape speed measurement For head azimuth measurement Cassette type for CTG-N (mechanism adjustment) DC14.4V(10.516V) 4 (2Speakers connection) 20k Tuner section BAND STEP FM : 100kHz (Seek), 50kHz (Manual) AM : 9kHz step DUMMY LOAD Exclusive dummy load should

33、 be used for AM and FM dummy load,there is a loss of 6dB between SSG output and antenna input. The loss of 6dB need not be considered since direct reading of figures are applied in this working standard. Arrangement of Adjusting Cassette Mechanism Section Preset Memory Initialization Preset Memory B

34、and M1 M2 97.9 216 M3 603 M4 105.9 999 M5 108.0 1404 M6 87.5 1620 FM(MHz) AM(kHz) Azimuth screw (Forward side) Azimuth screw (Reverse side) Playback head Tape speed adjust Capstan motor Cassette mechanism (Surface) Test Instruments reqired for adjustment 2.Frequency Counter meter 3.Electric voltmete

35、r 4.Wow & flutter meter 5.Test Tapes VT724 VT739 VT712 VT703 6.Torque gauge 87.5 153 89.9 KS-FX915R/KS-FX815 1-12 1 C401 C402 C403 C404 C405 C406 C407 C408 C409 C410 C411 C412 C413 C414 C415 C416 C417 C418 C419 CP401 CP402 CP403 D401 D402 D403 IC401 IC402 Q401 Q402 Q403 R401 R402 R403 R404 R405 R406

36、 R407 R408 R409 R410 R411 R412 R413 R414 R415 R416 R417 R418 R419 R420 R421 R422 R423 R424 R425 VR402 VR401 B403 B415 B413 B407 B416 B406 B414 B405 B412 B404 B410 B402 B408 B401 B409 B411 1 11 21 1 17 1 2 E 1 1 FSMW1101A 31 TPP VR402:Rch (Dolby NR level adj) VR401:Rch (Dolby NR Frequency response ad

37、j) Arrangment of adjusting Head amplifier board section (Reverse side) Information for using a car audio service jig 1.Were advancing efforts to make our extension cords common for all car audio products. Please use this type of extension cord as follows. 2.As a U-shape type top cover is employed, t

38、his type of extension cord is needed to check operation of the mechanism assembly after disassembly. 3.Extension cord : EXTKSRT002-18P ( 18 pin extension cord ) For connection between mechanism assembly and main board assembly. Check for mechanism driving section such as motor ,etc. Disassembly meth

39、od 1.Remove the bottom cover. 2.Remove the front panel assembly. 3.Remove the top cover . 4.Install the front panel. 5.Confirm that current is being carried by connecting an extension cord jig. Note Available to connect to the CP701 connector when in- stalling the front panel. Cassette mechanism Fro

40、nt panel assembly EXTKSRT002-18P Extension cord Main boardMain board EXTKSRT002-18P to Main board to Cassette mechanism KS-FX915R/KS-FX815 1-13 ItemConditionsAdjustment and Confirmation methodsS.ValuesAdjust Head azimuth adjustment Head height adjustment Adjust the azimuth directly. When you adjust

41、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 and azimuth adjustment screw B so that line A of the mirror tape runs in

42、 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 with azimuth adjustment screw B so that line B of the mirror tape runs

43、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 frequency response confiramation 3. 1. 2. 3. Check to see if the reading

44、 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 volume position at 2V. Play test tape VTT739 and confirm. 1kHz / 10kHz: -1

45、 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 VTT703 (VT703) (10kHz) and play it back in the forward play mode. Adjust

46、 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 phase difference should be 45 or more.) When switching between forward an

47、d 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. Head azimuth adjustment Tape speed: 3015 3045Hz Wow flutter: less than 0

48、.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 Adj B REV Adj CHEIGHT Adj A phase (0 )(45 ) Head shield The head is at l

49、ow position during. The head is at High position during REV. Output level: Maximum KS-FX915R/KS-FX815 1-14 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 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 DETECTO