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JVC KS-FX742R Service Manual
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JVC KS-FX742R Service Manual

JVC KS-FX742R Service Manual

Cassette receiver
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3 7 63 1515 0
SERVICE MANUAL
03
2003
49816
TE
L 13942296513
1
Safety precaution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21
www
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http://www.xiaoyu163.com
CASSETTE RECEIVER
KS-FX742R
TABLE OF CONTENTS
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u163
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COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
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6 7
1 3
1 5
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9 4
2 8
0 5
8
2 9
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2 8
Area Suffix
E ---------- Continental Europe
EX -------------- Central Europe
m
KS-FX742R
9 9
9 9
No.49816
2003/03

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Summary of Contents for JVC KS-FX742R

  • Page 1 KS-FX742R 3 7 63 1515 0 SERVICE MANUAL CASSETTE RECEIVER 49816 2003 KS-FX742R L 13942296513 Area Suffix E ---------- Continental Europe EX -------------- Central Europe TABLE OF CONTENTS Safety precaution ..............1-2 Disassembly method .
  • Page 2 KS-FX742R 3 7 63 1515 0 SECTION 1 Safety precaution CAUTION 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 KS-FX742R 3 7 63 1515 0 SECTION 2 Disassembly method 2.1 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...
  • Page 4 KS-FX742R 3 7 63 1515 0 2.1.4 Removing the heat sink (See Fig.4) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the two screws B and two screws C attaching the heat sink on the left side of the body, and remove the heat sink.
  • Page 5 KS-FX742R 3 7 63 1515 0 2.1.7 Removing the cassette mechanism assembly (See Fig.7) • Prior to performing the following procedure, remove the front Cassette mechanism assembly panel assembly, bottom cover, front chassis, heat sink, rear panel and main board.
  • Page 6 KS-FX742R 3 7 63 1515 0 2.2 CD 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).
  • Page 7 KS-FX742R 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 of the cassette holder and move in the direction of the ar- Cassette hanger assembly row to release the joint c.
  • Page 8 KS-FX742R 3 7 63 1515 0 2.2.4 Removing the side bracket assembly (See Fig.8 to 10) (1) Remove the screw A attaching the side bracket assembly. (2) Detach the front side of the side bracket assembly upward Side bracket assembly and pull out forward to release the joint i and j in the rear.
  • Page 9 KS-FX742R 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. Pinch arm (F) assembly Polywasher (2) Remove the compulsion spring.
  • Page 10 KS-FX742R 3 7 63 1515 0 2.2.8 Removing the head / tape guide (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. Pinch arm spring (2) Remove the two screws B, the head and the head support spring.
  • Page 11 KS-FX742R 3 7 63 1515 0 2.2.10 Disassembling the flywheel assembly (F) (See Fig.20 and 21) (1) Push and turn counterclockwise the spring holder (F) to re- Polywasher lease the three joints p on the bottom of the flywheel.
  • Page 12 KS-FX742R 3 7 63 1515 0 2.2.13 Removing the gear base arm / gear base link assembly (See Fig.25 to 27) (1) Move the gear base arm in the direction of the arrow. Gear base arm Joint t (2) Insert a slotted screwdriver to the gear base spring under...
  • Page 13 KS-FX742R 3 7 63 1515 0 2.2.15 Removing the mode gear Mode switch actuator Mode gear (See Fig.28 and 31) (1) Remove the polywasher on the bottom and pull out the mode gear. 2.2.16 Removing the mode switch actuator (See Fig.28, 29 and 31)
  • Page 14 KS-FX742R 3 7 63 1515 0 2.2.19 Removing the gear base assembly / take up gear / reflector gear (See Fig.32 to 34) (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 15 KS-FX742R 3 7 63 1515 0 2.2.21 Removing the side bracket assembly (See Fig.35 to 39) (1) Remove the eject cam plate spring. (2) Push the joint f' through the slot to remove the load rack Boss g' downward.
  • Page 16 KS-FX742R 3 7 63 1515 0 2.2.22 Removing the main motor assembly / sub motor assembly (See Fig.40 to 42) (1) Remove the belt at the bottom. (2) Remove the polywasher and pull out the mode gear. Main motor assembly (3) Pull out the reduction gear (B).
  • Page 17 KS-FX742R 3 7 63 1515 0 SECTION 3 Adjustment 3.1 Adjustment method Test instruments reqired for adjustment Standard volume position 1. Digital oscilloscoe(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 &...
  • Page 18 KS-FX742R 3 7 63 1515 0 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.
  • Page 19 KS-FX742R 3 7 63 1515 0 Arrangement of adjusting & test points Cassette mechanism (Surface) Motor assembly Tape speed adjust Playback head Azimuth screw L 13942296513 Head section view Head azimuth screw Fixed screw Playback head Height adjusting screw...
  • Page 20 KS-FX742R 3 7 63 1515 0 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 21 KS-FX742R 3 7 63 1515 0 SECTION 4 Description of major ICs 4.1 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...
  • Page 22 KS-FX742R 3 7 63 1515 0 4.2 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...
  • Page 23 KS-FX742R 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...
  • Page 24 KS-FX742R 3 7 63 1515 0 4.3 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 L 13942296513 Note: CL includes probe and jig capacitance 4.4 LB1641 (IC402) : DC motor driver...
  • Page 25 KS-FX742R 3 7 63 1515 0 4.5 LC75823W (IC651) : 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 26 KS-FX742R 3 7 63 1515 0 4.6 SAA6579T-X(IC71):RDS detecter • Pin layout • Block diagram • Pin function L 13942296513 Pin No. Symbol Description QUAL Quality indication output DATA RDS data output Vref Reference voltage output (0.5VDDA) Multiolex signal input...
  • Page 27 KS-FX742R 3 7 63 1515 0 4.7 TEA6320T-X (IC161) : E.volume • Pin layout OUTRR OUTLR OUTRF OUTLF Vref MUTE CD-CH TAPE TUNER • Block diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE ZERO CROSS FENDER REAR...
  • Page 28 KS-FX742R 3 7 63 1515 0 4.8 UPD178078GF-596 (IC701) : System CPU • Pin layout • Pin function Pin No. Symbol Function PS1(on) ACC ON/OFF detection signal input PS2(stop) Memory ON/OFF detection signal input POWER POWER ON/OFF control output...
  • Page 29 KS-FX742R 3 7 63 1515 0 Pin No. Symbol Function GND0 SEEK/STOP auto seek/receiving control output GND2 IF count input VDDPLL OSC INPUT FM/AM local osc input NO USE GNDPLL AM E.OUT AM error output FM E,OUT FM error output...
  • Page 30 KS-FX742R 3 7 63 1515 0 L 13942296513 u163 1-30 (No.49816) http://www.xiaoyu163.com...
  • Page 31 KS-FX742R 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.49816) Printed in Japan 200303WPC http://www.xiaoyu163.com...
  • Page 32 KS-FX742R 3 7 63 1515 0 SCHEMATIC DIAGRAMS CASSETTE RECEIVER KS-FX742R CD-ROM No.SML200303 L 13942296513 Area Suffix E ---- Continental Europe EX -------- Central Europe Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5,6 u163 No.49816SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.

  • Page 33: Safety Precaution

    KS-FX742R 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 34: Block Diagram

    KS-FX742R 3 7 6 3 1 5 1 5 0 Block diagram MOTOR SWITCH MAIN TAPE END.STANDBY MOTOR HEAD CN402 CN403 FWD-L FWD-R TO SPEAKER TO CD CHANGER MOTOR REW-L CONNECTOR TO REAR LINE OUT TAPEIN SUBMO+ REW-R MODE...
  • Page 35 KS-FX742R KS-FX742R 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amp section IC301 LA4743K QAU0292-001 J321 QNN0519-001 C323 C321 0.01 C324 C325 R301 C322 150p C308 QNB0100-002 C326 0.22 R302 0.22 1/50 C309 1/50 4.7u...
  • Page 36 KS-FX742R 3 7 6 3 1 5 1 5 0 LCD & Key control section Main amp section LCD1 CJ601 QLD0251-001 VMC0335-001 CP701 1 3 9 4 2 2 9 6 5 1 3 2.2k R659 COM1 D651 D655...
  • Page 37 KS-FX742R KS-FX742R 3 7 6 3 1 5 1 5 0 Head amp section Q403 2SB1322/RS/-T R410 Q402 CN403 UN2211-x 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 38 KS-FX742R 3 7 63 1515 0 Printed circuit boards Main board C981 L901 C910 CP901 J801 C982 R903 B911 J321 Q341 R910 Q331 R351 IC901 C905 R902 R912 B903 Q351 B901 CP401 B906 D901 B907 R353 C913 Q321 C305...
  • Page 39 KS-FX742R 3 7 63 1515 0 Front board Forward side D601 R612 R601 S621 D606 S601 D616 C653 D619 R603 R652 R611 S620 S604 S603 S608 D605 D617 R602 S618 S602 R605 R604 D604 S605 D618 D620 S619 LCD1...
  • Page 40 KS-FX742R 3 7 63 1515 0 Mecha board B403 C408 C405 C416 Q406 R407 C407 R408 R416 IC401 R406 C406 R417 C417 R423 R414 R415 R422 B416 C414 B404 B415 CN403 IC402 R425 CN401 B413 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 41 KS-FX742R 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.49816SCH) 2003/03 http://www.xiaoyu163.com...

  • Page 42: Parts List

    KS-FX742R 3 7 63 1515 0 PARTS LIST [ KS-FX742R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E------------ Continental Europe EX --------------- Central Europe L 13942296513 - Contents - Exploded view of general assembly and parts list (Block No.M1)
  • Page 43 KS-FX742R 3 7 63 1515 0 Exploded view of general assmbly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 44 KS-FX742R 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local ------------ MECHA FSYH4036-050 SHEET GE20136-001A MECHA BKT(L) FSKL2002-002 MECHA BKT(R) QYSDST2606Z SCREW 2.6mm x 6mm(x4)
  • Page 45 KS-FX742R 3 7 63 1515 0 Cassette mechanism assembly and parts list Block No. CDS-802JE3 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 46 KS-FX742R 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 2-1821-0040-D2S PSW-S 2.1 (x3) 2-1711-5040-16S E RING X-0802-1009S MAIN CHASSIS AS...
  • Page 47 KS-FX742R 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 48 KS-FX742R 3 7 63 1515 0 Grease point 2/2 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 49: Electrical Parts List

    KS-FX742R 3 7 63 1515 0 Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] QERF1HM-105Z E CAPACITOR 1uF 50V M  Symbol No. Part No. Part Name Description Local QERF1HM-105Z...
  • Page 50 KS-FX742R 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local C702 NCB31EK-104X C CAPACITOR 0.1uF 25V K R245 NRSA63J-470X MG RESISTOR 47Ω 1/16W J C703...
  • Page 51 KS-FX742R 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local R903 NRS181J-472X MG RESISTOR 4.7kΩ 1/8W J R610 NRSA63J-182X MG RESISTOR 1.8kΩ 1/16W J R904...
  • Page 52 KS-FX742R 3 7 63 1515 0  Symbol No. Part No. Part Name Description Local C403 NCB21CK-184X C CAPACITOR 0.18uF 16V K C404 NCB31EK-104X C CAPACITOR 0.1uF 25V K C405 QERF1HM-105Z E CAPACITOR 1uF 50V M C406 NCB31EK-103X C CAPACITOR 0.01uF 25V K...
  • Page 53 KS-FX742R 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. A2~A7 L 13942296513 KIT:A9~A13 u163 3-12 http://www.xiaoyu163.com...
  • Page 54 KS-FX742R 3 7 63 1515 0 Packing Accessories Block No. [M][3][M][M] Block No. [M][5][M][M]  Symbol No. Part No.  Symbol No. Part No. Part Name Description Local Part Name Description Local FSPG4002-001 POLY BAG (x2) FX742RED GET0114-001A INST BOOK...