JVC KS-FX842R Service Manual
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JVC KS-FX842R Service Manual

JVC KS-FX842R Service Manual

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3 7 63 1515 0
SERVICE MANUAL
5
2003
49854
TE
L 13942296513
1
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
www
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http://www.xiaoyu163.com
CASSETTE RECEIVER
KS-FX842R
TABLE OF CONTENTS
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COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
http://www.xiaoyu163.com
2 9
8
E ---------- Continental Europe
EX -------------- Central Europe
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3
6 7
1 3
1 5
co
.
9 4
2 8
Area Suffix
0 5
8
2 9
9 4
2 8
m
No.49854
9 9
9 9
2003/6

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Summary of Contents for JVC KS-FX842R

  • Page 1 3 7 63 1515 0 SERVICE MANUAL CASSETTE RECEIVER 49854 2003 KS-FX842R Area Suffix E ---------- Continental Europe EX -------------- Central Europe L 13942296513 TABLE OF CONTENTS Precautions ................1-3 Disassembly method .
  • Page 2 http://www.xiaoyu163.com 3 7 63 1515 0 SPECIFICATION AUDIO AMPLIFIER SECTION Maximum Power Output Front 45 W per channel Rear 45 W per channel 17 W per channel into 4 Ω 40 Hz to 20 000 Hz Continuous Power Output Front (RMS) at no more than 0.8% total harmonic distortion.

  • Page 3: Precautions

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 1 Precautions Safety Precautions 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. L 13942296513 u163 (No.49854)1-3...

  • Page 4: Disassembly Method

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 2 Disassembly method Main body 2.1.1 Removing the front panel assembly (See Fig.1) (1) Press the release button and remove the front panel as- sembly. Front panel assembly Release button Fig.1 2.1.2 Removing the bottom cover (See Fig.2) •...
  • Page 5 http://www.xiaoyu163.com 3 7 63 1515 0 2.1.4 Removing the heat sink (See Fig.5) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the two screws C and screw D attaching the heat sink on the left side of the main body, and remove the heat sink.
  • Page 6 http://www.xiaoyu163.com 3 7 63 1515 0 2.1.7 Removing the cassette mechanism assembly (See Fig.8) • Prior to performing the following procedures, remove the front panel assembly, bottom cover, front chassis assembly, heat Cassette mechanism assembly sink, rear panel and main board. (1) Disconnect the wire from the connector CN402 on the mecha board.
  • Page 7 http://www.xiaoyu163.com 3 7 63 1515 0 2.1.9 Removing the front board (See Figs.10 to 12) • Prior to performing the following procedures, remove the front panel assembly. (1) Remove the four screws L attaching the rear cover on the back side of the front panel assembly. (See Fig.10.) (2) Release the ten joints g, the front panel assembly and rear cover become separate.

  • Page 8: No.49854)1

    http://www.xiaoyu163.com 3 7 63 1515 0 Cassette mechanism assembly REFERENCE: Prior to performing the following procedures, turn the mode gear on the bottom of the body until the respective part comes to the EJECT position (Refer to Fig.1). Mode gear Fig.1 2.2.1 Removing the cassette guide (See Fig.2)

  • Page 9: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 3 7 63 1515 0 2.2.3 Removing the cassette hanger assembly / cassette holder (See Fig.4 to 7) (1) Check the mode is set to EJECT. Push down the front part Cassette holder assembly of the cassette holder and move in the direction of the ar- row to release the joint c.
  • Page 10 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.4 Removing the side bracket assembly Side bracket assembly (See Fig.8 to 10) Joint i (1) Remove the screw A attaching the side bracket assembly. (2) Detach the front side of the side bracket assembly upward and pull out forward to release the joint i and j in the rear.
  • Page 11 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.5 Removing the pinch arm (F) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (F) as- sembly. (2) Remove the compulsion spring. 2.2.6 Removing the pinch arm (R) assembly (See Fig.11 and 12) (1) Remove the polywasher and pull out the pinch arm (R) as- sembly.
  • Page 12 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.8 Removing the head / tape guide Flywheel assembly (F) Belt (See Fig.16 and 17) REFERENCE: It is not necessary to remove the slide chassis assembly. (1) Remove the band attaching the wire to the head. (2) Remove the two screws B, the head and the head support spring.
  • Page 13 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.10 Disassembling the flywheel assembly (F) FFC pad (See Fig.19 and 20) (1) Push and turn counterclockwise the spring holder (F) to re- lease the three joints p on the bottom of the flywheel. (2) The spring holder (F), the TU spring and the friction gear play come off.
  • Page 14 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.13 Removing the gear base arm / gear base link assembly (See Fig.23 to 25) (1) Move the gear base arm in the direction of the arrow. Gear base arm (2) Insert a slotted screwdriver to the gear base spring under Joint t Joints s the gear base arm, and release the gear base arm upward...
  • Page 15 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.15 Removing the mode gear Mode gear Mode switch actuator (See Fig.26 and 29) (1) Remove the polywasher on the bottom and pull out the mode gear. 2.2.16 Removing the mode switch actuator (See Fig.26, 27 and 29) (1) Pull out the mode switch actuator at the bottom.
  • Page 16 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.19 Removing the gear base assembly / take up gear / reflector gear (See Fig.30 to 32) (1) Push in the pin d’ of the gear base assembly on the upper Slot e' side of the body and move the reflector gear toward the bottom, then pull out.
  • Page 17 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.21 Removing the side bracket assembly Side bracket assembly (See Fig.33 to 37) Boss g' (1) Remove the eject cam plate spring. (2) Push the joint f’ through the slot to remove the load rack downward.
  • Page 18 http://www.xiaoyu163.com 3 7 63 1515 0 2.2.22 Removing the main motor assembly / sub motor assembly (See Fig.38 to 40) (1) Remove the belt at the bottom. Main motor (2) Remove the polywasher and pull out the mode gear. assembly (3) Pull out the reduction gear (B).

  • Page 19: Adjustment

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 3 Adjustment Adjustment method Test instruments required for adjustment Standard volume position (1) Digital oscilloscope (100MHz) Balance and Bass, Treble volume, Fader : Center (Indication "0") (2) Frequency counter meter Loudness, Dolby NR, Sound, Cruise : Off (3) Electric voltmeter Volume position is about 2V at speaker output with following (4) Wow &...
  • Page 20 http://www.xiaoyu163.com 3 7 63 1515 0 Information for using a car audio service jig (1) 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 21 http://www.xiaoyu163.com 3 7 63 1515 0 Arrangement of adjusting & test points Cassette mechanism (Surface) Motor assembly Tape speed adjust Azimuth screw A (Forward) Playback head Azimuth screw B (Reverse) L 13942296513 Head section view Playback head Azimuth screw B Azimuth screw A (Reverse) (Forward)
  • Page 22 http://www.xiaoyu163.com 3 7 63 1515 0 Item Conditions Adjustment and Confirmation methods S.Values Adjust 1. Head azi- Test tape: Head height adjustment muth adjust- SCC-1659 Adjust the azimuth directly. When you adjust the height ment VT703 (10kHz) using a mirror tape, remove the cassette housing from A line the mechanism chassis.

  • Page 23: Description Of Major Ics

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 4 Description of major ICs 4.1 BR24L16F-W-X (IC771) : EEPROM • Pin layout • Pin function Symbol Function Power supply. A0,A1,A2 No use connect to GND. Serial clock input. I/O Serial data I/O of slave and ward address. Write protect terminal.
  • Page 24 http://www.xiaoyu163.com 3 7 63 1515 0 HA12231FP-X (IC401) : PB Equalizer/Line Mute/Music Sensor • Pin layout & Block diagram Amp. Ripple Filter Amp. • Pin function Pin No. Symbol Function VREF Reference output FIN(R) Equalizer input RIN(R) Equalizer input EQOUT(R) Equalizer output TAI(R) Tape input...
  • Page 25 http://www.xiaoyu163.com 3 7 63 1515 0 HA13164A (IC901) : Regulator • Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 • Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u EXT OUT COMPOUT BIAS...

  • Page 26: Table Of Contents

    http://www.xiaoyu163.com 3 7 63 1515 0 LA4743K (IC301) : Power amp. • Block diagram 2200 F 0.022 F Vcc 1/2 Vcc 3/4 IN 1 OUT 1+ 0.22 F OUT 1- PWR GND1 Protective circuit OUT 2+ IN 2 OUT 2- 0.22 F PWR GND2 L 13942296513...

  • Page 27: Tab

    http://www.xiaoyu163.com 3 7 63 1515 0 • Pin layout • Pin function Pin No. Symbol Function Pin No. Symbol Function Header of IC FLIN Front Lch input Power GND RLIN Rear Lch input Outpur(-) for front Rch ONTIME Power on time control STDBY Stand by input Output (+) for rear Lch...

  • Page 28: Vcc

    http://www.xiaoyu163.com 3 7 63 1515 0 HD74HC126FP-X (IC801) : Buffer • Pin layout • Pin function Input Output Note: H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input • Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output...
  • Page 29 http://www.xiaoyu163.com 3 7 63 1515 0 LC75823W (IC601) : LCD driver • Pin Layout 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 •...
  • Page 30 http://www.xiaoyu163.com 3 7 63 1515 0 4.10 SAA6579T-X (IC71):RDS detecter • Pin layout QUAL DATA Vref OSCO OSCI TEST SCOUT MODE • Block diagram ANTI- 57 kHz OSCILLATOR QUALITY BIT RECONSTRUCTION ALIASING BAND PASS GENERATOR FILTER FILTER (8th ORDER) DIVIDER COSTAS LOOP BIPHASE CLOCKED...

  • Page 31: Out

    http://www.xiaoyu163.com 3 7 63 1515 0 4.11 TB2118F-X (IC31) : PLL • Terminal Layout • Block diagram Constant power supply voltage Buff. ON/OFF AM CP. Phase OSC circuit Reference Counter Comparator switch FM VCO 4-bit Prescaler Swallow counter 12-bit AMVCO Programmable counter 20-bit BINARY COUNTER L 13942296513...
  • Page 32 http://www.xiaoyu163.com 3 7 63 1515 0 4.12 UPD784215AGC223 (IC701) : Main micon • Pin layout • Pin function Pin No. Symbol I/O Function TAPE IN I Cassette tape inside signal H:Inside L:Outside STAND BY I Stand-by position detection signal input H:Loading L:Eject side 3 to 8 no use - Not used...
  • Page 33 http://www.xiaoyu163.com 3 7 63 1515 0 Pin No. Symbol I/O Function no use - Not used E2PROM-DI I I2C data input E2PROM-DO O I2C data output E2PROM-CLK O I2C clock output OPEN I DOOR OPEN SW 49,50 no use - Not used 51,52 no use - Not used...

  • Page 34: Out

    http://www.xiaoyu163.com 3 7 63 1515 0 4.13TEA6320T-X (IC161) : E.volume • Pin layout OUTRR OUTLR OUTLF OUTRF Vref MUTE CD-CH TAPE TUNER • Block diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE ZERO CROSS FENDER REAR POWER DETECTOR SUPPLY VOLUME 1 BASS...
  • Page 35 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 (No.49854)1-35 http://www.xiaoyu163.com...
  • Page 36 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.49854) Printed in Japan http://www.xiaoyu163.com...

  • Page 37: Schematic Diagrams

    KS-FX842R 3 7 63 1515 0 SCHEMATIC DIAGRAMS CASSETTE RECEIVER KS-FX842R CD-ROM No.SML200306 Area Suffix E ---------- Continental Europe EX -------------- Central Europe L 13942296513 Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 7 u163 No.49854SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.

  • Page 38: Safety Precaution

    KS-FX842R 3 7 63 1515 0 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. L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 39: Out

    KS-FX842R 3 7 6 3 1 5 1 5 0 Block diagram MOTOR SWITCH MAIN TAPE END.STANDBY MOTOR HEAD CN403 CN402 FWD-L FWD-R TO SPEAKER TO CD CHANGER MOTOR REW-L CONNECTOR TO REAR LINE OUT TAPEIN SUBMO+ REW-R MODE...
  • Page 40 KS-FX842R KS-FX842R Standard schematic diagrams 3 7 6 3 1 5 1 5 0 Main amp section RB160M-30-X R243 R249 D242 C243 R242 0.047 180k R245 R240 C241 R247 1/50 R244 R248 IC301 C244 R241 0.22 C242 LA4743K 22/16...
  • Page 41 KS-FX842R 3 7 6 3 1 5 1 5 0 LCD & Key control section EN601 QSW0863-002 IC602 RPM6938-SV4 R661 C681 C682 0.022 0.022 R662 CN601 NNZ0087-001 REMOCON ACC5V LCD1 QLD0254-002 ENC1 ENC2 LCDCE LCDDA LCDCL BUS2 KEY2 KEY1...
  • Page 42 KS-FX842R KS-FX842R 3 7 6 3 1 5 1 5 0 Head amp section Q403 2SB1322/RS/-T R410 Q402 UN2211-X CN403 QGF1219F1-10S C403 R403 R408 0.18 R415 R414 C414 4.7k 5.6k 1 3 9 4 2 2 9 6 5 1 3...
  • Page 43 KS-FX842R 3 7 63 1515 0 Printed circuit boards Main board Forward side IC901 J321 Q331 Q321 Q351 Q341 L901 J801 CP401 CN901 D901 R901 C308 C318 C309 C319 IC31 IC161 L 13942296513 R706 R760 R762 IC701 C705 X701...
  • Page 44 KS-FX842R 3 7 63 1515 0 Main board Reverse side IC901 D901 CP401 IC301 R901 C325 C326 Q701 R161 R163 R164 R162 C308 Reverse side C318 Q976 R302 Q977 C309 C319 R312 C243 R307 Q241 L 13942296513 R306 R724...
  • Page 45 KS-FX842R 3 7 63 1515 0 Front board Forward side D625 D619 D622 S613 IC602 S617 S603 EN601 D620 R615 D607 D606 D623 S605 R605 S607 R604 R603 D621 R601 R606 R602 R649 R607 S602 S616 S614 D613 LCD1...
  • Page 46 KS-FX842R 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.49854SCH) 2003/06 http://www.xiaoyu163.com...

  • Page 47: Parts List

    KS-FX842R 3 7 63 1515 0 PARTS LIST [ KS-FX842R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E------------ Continental Europe EX --------------- Central Europe L 13942296513 - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1)
  • Page 48 KS-FX842R 3 7 63 1515 0 Exploded view of general assmbly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 49 KS-FX842R 3 7 63 1515 0 General assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local QYSDST2606Z SCREW 2.6mm x 6mm QYSDST2606Z SCREW 2.6mm x 6mm FSYH4036-050 SHEET...
  • Page 50 KS-FX842R 3 7 63 1515 0 Cassette mechanism assembly and parts list Block No. CDS-802JE3 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 51 KS-FX842R 3 7 63 1515 0 Cassette mechanism Block No. [M][P][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local 2-1031-7030-C2S SCREW (x2) X-0802-1009S MAIN CHASSIS AS X-0802-1002S SLIDE CHASSIS A X-0802-1003S...
  • Page 52 KS-FX842R 3 7 63 1515 0 Grease point 1/2 FG-84M MEA-512R MEN-223 SW-902 CFD-409 CFD-250H EP-56 SW-474B L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 53 KS-FX842R 3 7 63 1515 0 Grease point 2/2 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 54: Electrical Parts List

    KS-FX842R 3 7 63 1515 0 Electrical parts list Main board Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] D903 1SS355-X SI DIODE Symbol No. Part No. Part Name Description Local D981 RB160M-30-X SB DIODE D982...
  • Page 55 KS-FX842R 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C184 QERF1EM-475Z E CAPACITOR 4.7uF 25V M NRSA63J-103X MG RESISTOR 10kΩ 1/16W J C241 QERF1HM-105Z E CAPACITOR...

  • Page 56: Front Board

    KS-FX842R 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R723 NRSA63J-103X MG RESISTOR 10kΩ 1/16W J J801 QNZ0095-001 CONNECTOR R724 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J...
  • Page 57 KS-FX842R 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R637 NRSA02J-821X MG RESISTOR 820Ω 1/10W J C408 QERF1CM-107Z E CAPACITOR 100uF 16V M R638 NRSA02J-511X MG RESISTOR 510Ω...
  • Page 58 KS-FX842R 3 7 63 1515 0 Packing materials and accessories parts list Block No. A1 A3 A4 A6 A7 A8 L 13942296513 KIT : A9 A10 u163 3-12 http://www.xiaoyu163.com...
  • Page 59 KS-FX842R 3 7 63 1515 0 Packing and accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local GET0140-001A INST BOOK ENG GER FRE DUT GET0140-002A INST BOOK RUS SPA ITA POL FX842RE GET0140-003A INSTALL MANUAL ENG GER FRE DUT...

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