Jvc-KSF-363-R-Service-Manual(1) 电路图 维修手册.pdf

SERVICE MANUAL CASSETTE RECEIVER No.49686 Feb. 2002 COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD. KS-F363R/KS-F360R KS-F363R/KS-F360R Area Suffix E EX Continental Europe Central Europe KS-F363R KS-F360R KS-F363R KS-F360R Contents Safety precaution Disassembly method Adjustment method Description of major ICs 1- 2 1- 3 1-12 1-1622 Different pont Illumination KS-F363R Amber KS-F360R Green RadioFans.CN 收音机爱 好者资料库 KS-F363R/KS-F360R 1-2 ! 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 system. Safety precaution RadioFans.CN 收音机爱 好者资料库 KS-F363R/KS-F360R 1-3 Press the eject button in the lower right part of the front panel. Remove the front panel assembly from the body. 1. Removing the front panel assembly (See Fig.1) Prior to performing the following procedure, remove the front panel assembly. Release the four joint tabs a on both sides of the front chassis assembly and remove the front chassis assembly toward the front. 1. Removing the front chassis assembly (See Fig.2 and 3) Disassembly method Fig.1 Fig.2 Fig.3 Front panel assembly Eject button Tab a Tab a Front chassis assembly Front chassis assembly Heat sink Tab a Tab a RadioFans.CN 收音机爱 好者资料库 KS-F363R/KS-F360R 1-4 Remove the three screws A on the left side of the body. 1. Removing the heat sink (See Fig.4) Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly and the heat sink. Turn over the body and unjoint the five joints b with the bottom cover and the body using a screwdriver. 1. Removing the bottom cover (See Fig.5 and 6) Fig.4 Fig.5 Fig.6 Heat sink A A Joints b Joints b Joint b Joints b Joints b Joint b Bottom cover Bottom cover Rear panel Rear panel KS-F363R/KS-F360R 1-5 Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly, the heat sink and the bottom cover. Remove the screw B, the screw C and the two screws D attaching the rear bracket on the back of the body. Remove the rear panel. Remove the two screws E attaching the main board on the bottom of the body. Disconnect connector CN901,CN902 on the main board in the direction of the arrow. 1. 2. Removing the main board (See Fig.7 and 8) Prior to performing the following procedure, remove the front panel assembly, the front chassis assembly, the heat sink, the bottom cover and the main board. Remove the four screws F attaching the cassette mechanism section on the back of the top chassis. 1. Removing the cassette mechanism section (See Fig.9) Fig.7 Fig.8 Fig.9 Rear panel B D D C Main board E E CN901 CN902 Cassette mechanism section F FF Top chassis F KS-F363R/KS-F360R 1-6 Prior to performing the following procedure, remove the front panel assembly. Remove the four screws G attaching the rear cover on the back of the front panel assembly. Unjoint the nine joints c with the front panel and the rear cover. Remove the control switch board on the back of the front panel. 1. 2. 3. Removing the control switch board (See Fig.10 to 12) Fig.10 Fig.11 Fig.12 GG GG Rear cover Joints c Joints c Joints c Joints c Front panel Rear cover Front panel Control switch board KS-F363R/KS-F360R 1-7 Prior to performing the following procedures, remove the head amplifier board, the relay board and the mechanism bracket. Unsolder the three wires a on the direction switch board. Remove the one screw A attaching the direction switch board. 1. 2. Removing the direction switch board (See Fig.1) Remove the screw B attaching the FF / REW lever assembly on the back of the cassette mechanism assembly. Remove the screw C on the upper side of the FF / REW lever assembly. Lift and pull forward the FF / REW lever assembly to disengage the joints b, c, d and e. 1. 2. 3. Removing the FF / REW lever assembly (See Fig.1) Reattach the FF / REW lever assembly to the joint c on the back of the chassis. Reattach the pinch-roller shaft e, the change lever d and the return link e to the chassis. 1. 2. Reattaching the FF / REW lever assembly (See Fig.1) C FF / REW lever assembly Joint c Joint b B A Direction switch board Joint d Joint e Soldering a Fig.1 KS-F363R/KS-F360R 1-8 Prior to performing the following procedure, remove the direction switch board and the FF / REW lever assembly. Remove the screw D attaching the playback head. Remove the C washer and pull out the FF roller. Remove the S support plate, the A arm spring (a) and (b), the playback head. 1. 2. 3. Removing the playback head (See Fig.2) The A arm spring (a) differs from the A arm spring (b). ATTENTION: Prior to performing the following procedure, remove the direction switch board and the FF / REW lever assembly. Remove the P arm spring (f) in the pinch-roller (F) assembly from the chassis. Remove the P arm spring (r) in the pinch-roller (R) assembly from the chassis. Draw out the pinch roller (F) and (R) assembly from the shaft. 1. 2. 3. Removing the pinch-roller (R) and (F) assembly (See Fig.2) The P arm spring (f) differs from the P arm spring (r). ATTENTION: The pinch roller (F) assembly differs from the pinch roller (R) assembly. ATTENTION: A arm spring (b) A arm spring (a) Pinch-roller (R) assembly Pinch-roller (F) assembly Shaft Shaft S support plate D C washer P arm spring (f)P arm spring (r) Remove the P arm spring (f) from the chassis. Remove the P arm spring (r) from the chassis. Playback head FF roller Fig.2 KS-F363R/KS-F360R 1-9 Prior to performing the following procedure, remove the FF / REW lever assembly. From the rear of the unit, bend the two tabs f outwards and disengage the two joints g in the direction of the arrow. Push the eject lever and remove the cassette holder from the playback head. Disengage the two joints h of the cassette hanger / cassette holder and the eject lever in the direction of the arrow. Lift the cassette hanger / cassette holder and disengage the joint i of the return link and the eject lever. 1. 2. 3. Removing the cassette hanger / cassette holder (See Fig.3) Unsolder the two wires j on the motor assembly.1. Turn over the cassette mechanism assembly and remove the main belt and the sub-belt from the motor pulley. 2. Remove the two screws G attaching the motor assembly. 3. Removing the motor assembly (See Fig.5) To replace the sub-belt, remove the main belt and the sub-belt from the motor pulley. Then remove the three screws E and one screw F. Replace with a new sub-belt while lifting the reel base assembly slightly. ATTENTION: Prior to performing the following procedure, remove the FF / REW lever assembly and the cassette hanger / cassette holder. Remove the C washer and pull out reel disc assembly.1. Removing the reel disc assembly (See Fig.4) Replace with a new C washer when reattaching. ATTENTION: The main belt can now be removed.ATTENTION: Cassette holder Cassette hanger Return link Joint i Eject lever Joint h Joint h Joint g Joint g Tab f Tab f Reel disc assembly Flywheel (BF) Flywheel (BR) E E E F G G Main-belt Reel base assembly Sub-belt Motor assembly Motor pulley Soldering j Fig.3 Fig.4 Fig.5 C washer C washer Chassis KS-F363R/KS-F360R 1-10 Raise the part k of the reel base assembly slightly and remove the selector link (B) on the front side of the cassette mechanism assembly by turning it as shown in Fig.10. Remove the three screws E and the one screw F on the underside of the cassette mechanism assembly. 1. 2. Removing the reel base assembly (See Fig.5 and 6) Prior to performing the following procedure, remove the cassette hanger / cassette holder. From the upper side of the cassette mechanism assembly, remove the C washer from each shaft of the flywheel (BF) and (BR). Turn over the cassette mechanism assembly and remove the main belt. Pull out the flywheel (BF) and (BR) downward respectively. 1. 2. Removing the Flywheel (BF) and (BR) assembly (See Fig.4 and 5) The reel base assembly is not repairable. Handle with care. ATTENTION: Selector link (B). Inside of the reel base assembly Reel disc assembly Flywheel (BF) Flywheel (BR) E E E F G G Main-belt Reel base assembly Sub-belt Motor assembly Motor pulley Soldering j Fig.4 Fig.5 Fig.6Fig.7 C washer C washer Pinch-roller (R) assembly Turn the selector link (B). k KS-F363R/KS-F360R 1-11 Unsolder the two wires l on the mute switch board on the back of the cassette mechanism assembly. Remove the screw H attaching the mute switch board. 1. 2. Removing the mute switch board (See Fig.8) Prior to performing the following procedure, remove the motor assembly. Unsolder the two wires m on the power switch on the side of the cassette mechanism assembly. Remove the screw I attaching the power switch. 1. 2. Removing the power switch (See Fig.9) Cassette mechanism assembly Soldering l H Mute switch board Soldering m I Power switch Cassette mechanism assembly Rower switch Motor assembly Fig.8 Fig.9 KS-F363R/KS-F360R 1-12 AM mode999kHz/62dB,INT/400Hz,30% modulation signal on recieving. FM mono mode FM stereo mode 1kHz,67.5kHz dev.pilot 7.5kHz dev Output level 0dB(1 V,50 /open terminal) 97.9MHz/66dB,INT/400Hz,22.5kHz deviation pilot off mono Frequenc Band Adjustment method Test instruments reqired for adjustmentStandard volume position Measuring conditions(Amplifier section) Frequency band 1. Digital oscilloscoe(100MHz) 2.Frequency counter meter 3.Electric voltmeter 4.Wow & flutter meter 5.Test tapes 6.Torque gauge.Cassette type for CTG-N (Mechanism adjustment) Power supply voltage. DC14.4V(11V - 16V allowance) Load impedance. 4 (4 to 8 allowance) Line out level/Impedance.1.0V/20k load (250 nWb/m) VT724.for DOLBY level measurement VT739.For playback frequency measurement VT712.For wow flutter & tape speed measurement VT703.For head azimuth measurement Balance and Bass, Treble volume, Fader :Center(Indication0) Loudness,Dolby NR,Sound,Cruise:Off Volume position is about 2V at speaker output with following conditions,Playback the test tape VT721. FM: 87.5 MHz to 108.0 MHz AM : 522 kHz to 1620 kHz(MW) 144 kHz to 279 kHz(LW) KS-F363R/KS-F360R 1-13 Extension cord : EXTKSRT002-6P EXTKSRT002-6P Front panel assembly Main board Cassette mechanism Information for using a car audio service jig 1.For 1995 and 1996 , 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, this type of extension cord is needed to check operation of the mechanism assembly after disassembly. 3.Extension cord : EXTKSRT002-6P ( 6 pin extension cord ) For connection between mechanism assembly and main board assembly. Check for mechanism driving section such as motor ,etc. Disassembly methodl 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 CN701 connector when in- stalling the front panel. KS-F363R/KS-F360R 1-14 Head section view Head azimuth screw Cassette mechanism (Surface) Tape speed adjust Motor assembly Fixed screw Height adjusting screw c Height adjusting screw b Height adjusting screw a Playback head Playback head Azimuth screw Arrangement of adjusting & test points KS-F363R/KS-F360R 1-15 Mechanism adjustment section ItemAdjusting & Confirmation MethodsAdjustStd. Value Head Height Adjustment Note Adjust the azimuth directly. When you adjust the height us- ing a mirror tape, remove the cassette housing from the mechanism chassis. After installing the cassette housing, perform the azimuth adjustment. 1.Load the mirror tape ( SCC-1659 ). Adjust with height adjustment screw (a) and 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. 2.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. 3.Adjust the azimuth screw (b) so that line B of the mirror tape runs in the center between Lch and Rch in the forward play mode. Head Azimuth Adjustment 1.Load the test tape ( VT724: 1kHz ) and play it back in the reverse play mode. set the Rch output level to maximum. 2.Load the test tape ( VT703: 10kHz ) and play it back in the forward play mode. Adjust the Rch and Lch output levels to maximum, with azimuth adjustment screw (b). In this case, the phase difference should be within 45 . 3.Engage the reverse mode and adjust the output level to maximum, with azimuth adjustment screw (c). *The phase difference should be 45 or more. 4.When switching between forward and reverse modes, the difference between channels should be within 3dB. *Between FWD Lch and Rch, REV Lch and Rch. 5.When the test tape ( VT721 : 315Hz ) is played back, the level difference between channels should be within 1.5dB. 1.Check to see if the reading of the frequency counter & Wow flutter meter is within 2940-3090 Hz( FWD/REV ), and less than 0.35% ( JIS RMS ). 2.In case of out of specification, adjust the motor with a built- in volume resistor. 1.Play the test tape ( VT724 : 1kHz ) back and set the volume position at 2V. 2.Play the test tape ( VT739 )back and confirm 0 + 3dB at1kHz/ - 8kHz and -4+2dB at 1kHz/125Hz. 3.When 8kHz is out of specification, it will be necessary to readjust the azimuth. Head shield Head shield The head is at low position during FWD. The head is at height position during REV. A Line B Line Phase screw (c) screw (a) screw (b) Head azimuth screw Fixed screw 0 45 Built-in volume resistor Tape Speed 2940-3090Hz Wow&Flutter Less than 0.35% (JIS RMS) Speaker out 1kHz/8kHz : 0dB_3dB, 125Hz/1kHz : -4dB+2dB, 1.Head azimuth 2.Tape Speed and Wow & Flutter 3.Playback Frequency response KS-F363R/KS-F360R 1-16 Description of major ICs Pin No.Port NameI/ODescriptions 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 KEY 0 KEY 1 KEY 2 LEVEL SM SQ LCDCE LCDDA LCDSCK BUSI/O UNLOCK BUSSI BUSSO BUSSCK NC NC NC NC NC NC GNDPORT VDDPORT AM AFCK MONO FM SEEK/STOP NC IFC VDDPLL FMOSC AMOSC GNDPLL AMEO FMEO IC SD/ST STAGE0 NC F/R I I I I I I O O O I - I O I/O - - - - - - - - O O O O O - I - I - - O O - I I - O Key input 0 Key input 1 Key input 2 Level meter input S.meter level input S.Quality level input CE output to LCD driver Data output to LCD driver Clock output to LCD driver I/O selector output for J-BUS, H : OUT, L: INPUT Non connect J-BUS Data input J-BUS Data output J-BUS Clock in/output Non connect Non connect Non connect Non connect Non connect Non connect Port GND Port Vdd Non connect AF check output, L: AF check Monaural on /off selecting output, H:mono on FM/AM switching output L : FM H : AM Auto seek /stop selecting output, H: Seek, L: