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JVC KS-FX8R Service Manual

Cassette receiver
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Download this manual See also: Instruction Manual
SERVICE MANUAL
CASSETTE RECEIVER
KS-FX8R
DISP
TP
PTY
SCM
Contents
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
COPYRIGHT
K S - F X 8 R
K S - F X 8 R
40Wx4
RDS
DOLBY B NR
7
8
9
10
11
12
CD
2001 VICTOR COMPANY OF JAPAN, LTD.
MO
RND
SSM
RPT
DAB
TAPE
FM/AM
-CH
E
1-2
1-3
1-10
1-14
KS-FX8R
Area Suffix
Continental Europe
No.49580
Jan. 2001

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Summary of Contents for JVC KS-FX8R

  • Page 1 KS-FX8R SERVICE MANUAL CASSETTE RECEIVER KS-FX8R K S - F X 8 R K S - F X 8 R 40Wx4 DISP DOLBY B NR TAPE FM/AM Area Suffix Continental Europe Contents Safety precaution Disassembly method Adjustment method 1-10 Description of major ICs 1-14 No.49580...

  • Page 2: Safety Precaution

    KS-FX8R Safety precaution 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.

  • Page 3: Disassembly Method

    KS-FX8R Disassembly method Removing the front panel unit (See Fig.1) Press the release switch and remove the front panel unit in the direction of the arrow. Front panel unit Fig.1 Joint c Removing the front chassis (See Fig.2~3) Remove the two screws A attaching the front chassis.
  • Page 4 KS-FX8R Removing the bottom cover (See Fig.5) Joints d Prior to performing the following procedure, remove Bottom cover the front chassis and the heat sink. Turn the body upside down. Insert a screwdriver to the two joints d and two joints...
  • Page 5 KS-FX8R Removing the cassette mechanism assembly Cassette mechanism assembly (See Fig.8) Prior to performing the following procedure, remove the front chassis, the heat sink, bottom cover and the main amplifier board assembly. Remove the four screws F attaching the cassette mechanism assembly from the top cover.
  • Page 6 KS-FX8R Cassette mechanism ass’y <Removal of the cassette mechanism> Removing the head amplifier board. Head relay (See Fig.1 and 2) board For the 6pin wire extending from connector CN402 on the head amplifier board, disconnect it from the head relay board.
  • Page 7 KS-FX8R Head relay board Removing the head relay board (See Fig.4) 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 the Joint c Soldering b arrow while releasing the two joints c.
  • Page 8 KS-FX8R Removing the flywheel Cassette mechanism ass’y Reel disc board (See Fig.10 and 12) Soldering j 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 Tab k board.
  • Page 9 KS-FX8R Push aside the gear and reattach the reel disc Ass’y( I ). Removing the reel disc ass’y( II ) (See Fig.12 to 15) ATTENTION: Prior to performing the following procedure, remove the reel disc ( I ). Release the plate from the three tabs o.

  • Page 10: Adjustment Method

    KS-FX8R Adjustment method Test Instruments reqired for adjustment Standard volume position 1. Digital osclloscope(100MHz) Balance and Bass,Treble volume .Fader 2. Frequency Counter meter :Center(Indication"0") 3. Electric voltmeter Loudness,Dolby NR,Sound,Cruise:Off 4. Wow & flutter meter Volume position is about 2V at speaker output with 5.
  • Page 11 KS-FX8R Arrangement of adjusting & test points Cassette mechanism (Surface) Motor assembly Tape speed adjust Playback head Azimuth screw Head section view Head azimuth screw Fixed screw Playback head Height adjusting screw a Height adjusting screw c Height adjusting screw b...
  • Page 12 KS-FX8R Information for using a car audio service jig 1. For 1995 and 1996 , we're 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.
  • Page 13 KS-FX8R Mechanism adjustment section Item Adjusting & Confirmation Methods Adjust Std. Value 1.Head azimuth "Head Height Adjustment" Note Adjust the azimuth directly. When you adjust the height us- A Line ing a mirror tape, remove the cassette housing from the mechanism chassis.

  • Page 14: Description Of Major Ics

    KS-FX8R Description of major ICs UPD178018AGC-551 (IC701) : Main system control CPU 1. Pin layout 2. Pin function Pin No. Port Name Descriptions KEY 0 Key input 0 KEY 1 Key input 1 KEY 2 Key input 2 LEVEL Level meter input S.meter level input...
  • Page 15 KS-FX8R Pin No. Port Name Descriptions Non connect Non connect TELMUTE Telephone mute signal detection input TAPEIN TAPE input I2CCLK I2C information clock output I2CDAO I2C information data output I2CDAI I2C information clock input Non connect Non connect Non connect...
  • Page 16 KS-FX8R BA4905-V3 (IC901) : Regulator 1.Pin layout 2.Block diagram REGULATOR RESET RESET COMP VDD 5.7V CD 8V AUDIO 9V CTRL ILM 10V 1-16...
  • Page 17 KS-FX8R 3.Pin function BA4905-V3 RESET If VDD voltage becomes 4V or less, RESET output becomes low level. This outout voltage is approximately 0.5V lower than VCC, and max EXT output output current is 300mA. A voltage supply for ACC block this outout voltage is approximately COMP output 0.7V lower than VDD'S.
  • Page 18 KS-FX8R CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp. 1.Pin layout & block diagram 7k/12k PBFB2 MSMODE 100k OFF/B PBRIN2 DRSW 300k MS MODE BIAS PBGND TAPESW MUTE PBFIN2 MUTESW TAPE EQ NR MODE...
  • Page 19 KS-FX8R HA13158A (IC301) : Power amp 1. Pin layout 2. Block diagram PVCC2 PVCC1 INVCC STBY INPUTBUFFER1 AMP1 INPUTBUFFER2 AMP2 INPUTBUFFER3 AMP3 INPUTBUFFER4 AMP4 MUTE PROTECTOR (ASO SURGE, TSD) 1-19...
  • Page 20 KS-FX8R HD74HC126FP-X (IC801) : Buffer 1.Pin layout 2.Pin function Input Outout 3.Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 1-20...
  • Page 21 KS-FX8R LC75873NW (IC601) : LCD driver 1.Block Diagram VDD1 COMMOM SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTER GENERATOR ADDRESS DETECTOR 2.Pin Functions Pin No. Symbol Description 1~66 S3~S68 Segment Output. 67~69 COM1~3 Common Driver Output. Power Supply Connection. VDD1 Used for applying the LCD drive 2/3 bias voltage externally.
  • Page 22 KS-FX8R SAA6579T-X(IC71):RDS detector 2.Pin Function 1.Terminal Layout Symbol Function QUAL RDCL Non connect QUAL RDDA RDS data output RDDA Vref OSCO Reference voltage output Vref OSC1 Multiplex signal input VDDA +5V Supply voltage for analog VDDA Ground for analog part (0V)
  • Page 23 KS-FX8R TEA6320T-X (IC161) : E.volume 1.Pin layout 2.Block diagram VOLUME 2 MUTE OUTRR OUTLR 0 to 55 dB FUNCTION BALANCE ZERO CROSS OUTRF OUTLF FENDER REAR POWER DETECTOR SUPPLY VOLUME 1 BASS TREBLE +20 to -31 dB VOLUME 2 LEFT...
  • Page 24 KS-FX8R VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan Printed in Japan (No.49850) 200101(O)

  • Page 25: Block Diagram

    KS-FX8R Block diagram...
  • Page 26 KS-FX8R < M E M O >...

  • Page 27: Standard Schematic Diagrams

    KS-FX8R Standard schematic diagrams Main amp section Main amp section Parts are safety assurance parts. When replacing those parts make sure to use the specified one. TUNER SIGNAL TAPE SIGNAL CD-CH SIGNAL FRONT SIGNAL REAR SIGNAL...
  • Page 28 KS-FX8R KS-FX8R LCD & Key control section...
  • Page 29 KS-FX8R Mecha control & Head amp section TAPE SIGNAL...
  • Page 30 KS-FX8R KS-FX8R Printed circuit boards Printed circuit boards Front board (Foerward side) Main board D601 S614 IC602 D621 EN601 S615 S605 D613 L901 CP901 FSMW1091A J321 IC901 R902 D612 S607 D618 D620 S616 R605 C911 R604 D901 S606 D617 D611...

  • Page 31: Table Of Contents

    KS-FX8R PARTS LIST [ KS-FX8R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe - Contents - Exploded view of general assembly and parts list 3- 2 Cassette mechanism assembly and parts list...

  • Page 32: Exploded View Of General Assembly And Parts List

    KS-FX8R Exploded view of general assembly and parts list Block No.
  • Page 33 KS-FX8R Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area --------------- CASETTE MECHA CDS-801 FSYH4036-050 SPACER FSKL2001-002 MECHA BRACKET(R) FSKL2002-001 MECHA BRACKET(L) QYSDST2606Z SCREW PCB + MECHA QYSDST2606Z SCREW MECHA+M.BRACKET FSJC1056-002 TOP CHASSIS FSMH3001-202...
  • Page 34 KS-FX8R Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area FSYH4036-032 SHEET FSJK3027-001 RIM LENS FOR KNOB FSXP3058-001 EJECT BUTTON VKW3001-330 COMP.SPRING FOR EJECT BUTTON FSXP3059-001 DETACH BUTTON VKW3001-330 COMP.SPRING FOR DETACH BUTTON FSJC1059-001...

  • Page 35: Cassette Mechanism Assembly And Parts List

    KS-FX8R Cassette mechanism assembly and parts list Block No. CDS-801 CFD-409 99 100 101 102 FG-84M FG-84M SW-902 FG-84M SW-902 CFD-409 CFD-409 CFD-409 SW-522B FG-84M FG-84M SW-522B FG-84M LEN-315Y2 FG-84M LEN-315Y2 CFD-409 LEN-315Y2 LEN-315Y2 FG-84M FG-84M FG-84M FG-84M FG-84M FG-84M...
  • Page 36 KS-FX8R Parts list (Cassette mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area X-0801-1003S MAIN CHASSIS AS X-0801-1002S SLIDE CHASSIS A X-0801-1008S SIDE BKT ASS'Y X-0801-1010S EJECT CAM LIMIT X-0801-1013S CASSETTE HANGER 1-0801-6002S FLYWHEEL ASSY F X-0801-2003S...
  • Page 37 KS-FX8R Parts list (Cassette mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area 1-0801-4008S REEL DRIVER SPG 1-0801-4009S LOAD ARM SPG 1-0801-4011S HOLDER STAB SPG 1-0801-5001S BELT 1-0801-5002S FELT 7.5*18.5*1.0 1-0801-5003S AZIMUTH SCR 1-0801-5004S FELT 11*18.5*1.0 1-0801-5005S...
  • Page 38 KS-FX8R Grease point 1/2 SW-902 SW-522B FG-84M CFD-409 LEN-315Y2 FG-84M SW-902 SW-902 SW-902 FG-84M FG-84M SW-902 FG-84M SW-902 FG-84M FG-84M...
  • Page 39 KS-FX8R Grease point 2/2...
  • Page 40 KS-FX8R Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area QERF1CM-107Z E CAPACITOR 100MF 20% 16V C 308 QERF1HM-225Z E CAPACITOR 2.2MF 20% 50V NDC21HJ-470X C CAPACITOR...
  • Page 41 KS-FX8R Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area D 982 CRS03-W SB DIODE R 43 NRSA02J-103X MG RESISTOR IC 71 SAA6579T-X R 44 NRS181J-102X MG RESISTOR...
  • Page 42 KS-FX8R Block No. 01 Block No. 02 Electrical parts list (Main board) Electrical parts list (Mecha control board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area R 712 NRSA02J-473X MG RESISTOR C 401 NDC21HJ-101X...
  • Page 43 KS-FX8R Block No. 03 Electrical parts list (Front board) Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NBE20JM-475X TS E CAPACITOR R 623 NRS181J-271X MG RESISTOR C 602 NCB21HK-103X C CAPACITOR R 624...

  • Page 44: Packing Materials And Accessories Parts List

    KS-FX8R Packing materials and accessories parts list Block No. Block No. KIT:A10 A14 A2 A6 3-14...

  • Page 45: Parts List

    KS-FX8R Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area QPC03004315P POLY BAG FSPG4002-001 POLY BAG INSTRUCTIONS QPA00801205 POLY BAG GE30123-033A CARTON GE10008-001A CUSHION FSYH4036-068 SHEET QPA01003003 POLY BAG HARD CASE Parts list (Accessories) Block No. M4MM...

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