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JVC KS-FX381 Service Manual
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JVC KS-FX381 Service Manual

JVC KS-FX381 Service Manual

Cassette receiver
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3 7 63 1515 0
SERVICE MANUAL
4
2005
MA132
TE
L 13942296513
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
.
http://www.xiaoyu163.com
CASSETTE RECEIVER
KS-FX381

TABLE OF CONTENTS

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u163
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COPYRIGHT © 2005 Victor Company of Japan, Limited
http://www.xiaoyu163.com
2 9
8
Q Q
3
6 7
1 3
1 5
co
.
9 4
2 8
Area suffix
UF ------------------------- China
0 5
8
2 9
9 4
2 8
m
No.MA132
9 9
9 9
2005/4

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Summary of Contents for JVC KS-FX381

  • Page 1: Table Of Contents

    3 7 63 1515 0 SERVICE MANUAL CASSETTE RECEIVER MA132 2005 KS-FX381 Area suffix UF ------------------------- China L 13942296513 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • 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 at no more Continuous Power Output (RMS) Front than 0.8% total harmonic distortion.

  • Page 3: Precaution

    http://www.xiaoyu163.com SECTION 1 3 7 63 1515 0 PRECAUTION 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.MA132)1-3...

  • Page 4: Specific Service Instructions

    http://www.xiaoyu163.com SECTION 2 3 7 63 1515 0 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. L 13942296513 u163 1-4 (No.MA132) http://www.xiaoyu163.com...

  • Page 5: Disassembly

    http://www.xiaoyu163.com SECTION 3 3 7 63 1515 0 DISASSEMBLY Main body section 3.1.1 Removing the front panel assembly (See Fig.1) (1) Push the detach button in the lower right part of the front panel assembly and remove the front panel assembly. Front panel assembly Detach button Fig.1...
  • Page 6 http://www.xiaoyu163.com 3.1.4 Removing the side panel 3 7 63 1515 0 (See Fig.4) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the screw B and two screws C attaching the side panel on the left side of the main body, and remove the side panel.
  • Page 7 http://www.xiaoyu163.com 3.1.7 Removing the cassette mechanism assembly 3 7 63 1515 0 (See Fig.7) • Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, side Cassette mechanism assembly panel, rear bracket and main board. (1) Remove the four screws H attaching the cassette mecha- nism assembly from the top chassis.
  • Page 8 http://www.xiaoyu163.com 3.1.10 Removing the mecha bracket 3 7 63 1515 0 (See Fig.10) • Prior to performing the following procedure, remove the front panel assembly, bottom cover, front chassis assembly, side Mecha bracket panel, rear bracket, main board, cassette mechanism assem- bly, head amplifier board and relay board.
  • Page 9 http://www.xiaoyu163.com Cassette mechanism assembly 3 7 63 1515 0 • Prior to performing the following procedures, remove the head 3.2.4 Removing the playback head amplifier board, the relay board and the mechanism bracket. (See Fig.2) • Prior to performing the following procedure, remove the direc- 3.2.1 Removing the direction switch board tion switch board and the FF / REW lever assembly.
  • Page 10 http://www.xiaoyu163.com 3.2.6 Removing the cassette hanger / cassette holder 3 7 63 1515 0 Cassette holder (See Fig.3) Return link Joint i • Prior to performing the following procedure, remove the FF / Cassette hanger REW lever assembly. Eject lever (1) From the rear of the unit, bend the two tabs f outwards and disengage the two joints g in the direction of the arrow.
  • Page 11 http://www.xiaoyu163.com 3.2.9 Removing the Flywheel (BF) and (BR) assembly 3 7 63 1515 0 3.2.10 Removing the reel base assembly (See Fig.4 and 5) (See Fig.5 and 6) • Prior to performing the following procedure, remove the cas- (1) Raise the part k of the reel base assembly slightly and re- sette hanger / cassette holder.
  • Page 12 http://www.xiaoyu163.com 3.2.11 Removing the mute switch board (See Fig.8) 3 7 63 1515 0 Cassette mechanism assembly Rower switch (1) Unsolder the two wires l on the mute switch board on the back of the cassette mechanism assembly. Soldering l Motor assembly (2) Remove the screw H attaching the mute switch board.

  • Page 13: Adjustment

    http://www.xiaoyu163.com SECTION 4 3 7 63 1515 0 ADJUSTMENT Adjustment method Test instruments required for adjustment (1) Digital oscilloscope (100MHz) (2) Frequency counter meter (3) Electric voltmeter (4) Wow & flutter meter (5) Test tapes VT724 : For DOLBY level measurement VT739 : For playback frequency measurement VT712 : For wow flutter &...
  • Page 14 http://www.xiaoyu163.com Information for using a car audio service jig 3 7 63 1515 0 (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 15 http://www.xiaoyu163.com Arrangement of Adjusting & Test points 3 7 63 1515 0 Cassette mechanism (Surface) Motor assembly Tape speed adjust Playback head Azimuth screw Head section view L 13942296513 Head azimuth screw Fixed screw Playback head Height adjusting screw a Height adjusting screw c Height adjusting screw b u163...
  • Page 16 http://www.xiaoyu163.com 3 7 63 1515 0 Item Conditions Adjustment and Confirmation methods S.Values Adjust Head Head height adjustment Test tape: azimuth Adjust the azimuth directly. When you SCC-1659 adjustment adjust the height using a mirror tape, VT703 (10kHz) remove the cassette housing from the mechanism chassis.

  • Page 17: Troubleshooting

    http://www.xiaoyu163.com SECTION 5 3 7 63 1515 0 TROUBLESHOOTING 16 PIN CORD DIAGRAM Black Green Violet BL/WH Blue Gray White Yellow WH/BK GN/BK VI/BK GY/BK 2 VI 10 VI/BK 1 GY 7 RD 9 GY/BK L 13942296513 16 YL 4 WH MEMORY 5 BL/WH 12 WH/BK...
  • Page 18 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MA132) Printed in Japan http://www.xiaoyu163.com...
  • Page 19 3 7 63 1515 0 SCHEMATIC DIAGRAMS CASSETTE RECEIVER KS-FX381 CD-ROM No.SML200504 Area suffix UF ------------------------ Chaina L 13942296513 Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 6 u163 No.MA132SCH COPYRIGHT 2005 Victor Company of Japan, Limited.
  • Page 20 http://www.xiaoyu163.com 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 21 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Block diagram Mechanism control board Relay board MAIN MOTOR HEAD MUTE SW TAPE/RADIO SW PROG.SW. SPEAKER LINE CP721 CD CHANGER CONNECTOR REAR OUT CN721 CP751 CP981 CJ921 CJ901 Main amplifier section Head amplifier section LFO+,LFO- LRO+,LRO-...

  • Page 22: Www Ao

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amplifier section QAU0394-001 Q989 KRA102M-T MUTE2 QNB0100-002 Q972 KRA102M-T 1SS119-041-T2 D973 CJ921 QNN0519-001 R163 4.7u R164 Q161 2SD2144S/VW/-T D161 R165 2.2K 1SS119-041-T2 Q261 2SD2144S/VW/-T D261 R265 MUTE R757 2.2K...
  • Page 23 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 Head amplifier section CJ901 QGA2002C1-05 IC901 UPC1228HA 1 3 9 4 2 2 9 6 5 1 3 C103 C203 R104 R204 330k 330k 100p 100p CP722 QGA2002F1-06 C901 CP721 QGB1214K1-06S CP901 QGB1214K1-06S...
  • Page 24 http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 LCD & Key control section To CN701 (SHEET 1) CP701 QGZ1601K1-15S IC651 LC75823W 1 3 9 4 2 2 9 6 5 1 3 COM1 R654 COM2 1.5k COM3 D654 R657 C651 UDZS5.1B-X...
  • Page 25 http://www.xiaoyu163.com 3 7 63 1515 0 Printed circuit boards Main board CP981 L981 CP751 CJ921 C981 D981 CN901 C983 D771 C986 C132 C150 C931 C771 C133 C997 R771 C940 R721 C709 C996 C942 R941 IC981 C933 R722 C934 R992 C250 C231 R997 C941...
  • Page 26 http://www.xiaoyu163.com 3 7 63 1515 0 Switch board Forward side D601 D602 R654 D619 C651 C653 R635 R655 D603 C652 R602 S603 S606 S604 D617 PL603 PL601 D604 D616 D615 D608 R606 D609 D610 D611 D607 R608 D612 R607 D614 S605 S608 R609...
  • Page 27 http://www.xiaoyu163.com 3 7 63 1515 0 < M E M O > L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 28 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY CAR ELECTRONICS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MA132SCH) http://www.xiaoyu163.com...

  • Page 29: Parts List

    3 7 63 1515 0 PARTS LIST [ KS-FX381 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix UF ---------------------------- China L 13942296513 - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 Cassette mechanism assembly and parts list (Block No.MP)
  • Page 30 http://www.xiaoyu163.com 3 7 63 1515 0 Exploded view of general assembly and parts list L 13942296513 Switch board u163 http://www.xiaoyu163.com...
  • Page 31 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 32 http://www.xiaoyu163.com 3 7 63 1515 0 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  GE10043-312A TOP CHASSIS GE40135-201A EARTH PLATE GE30938-203A SIDE PANEL QYSDST2004ZA TAP SCREW M2 x 4mm(x2) QYSDST2604ZA TAP SCREW M2.6 x 4mm(x4) GE40235-001A SCREW (x2)
  • Page 33 http://www.xiaoyu163.com 3 7 63 1515 0 Cassette mechanism assembly and parts list Block No. CDS-363SJ2 L 13942296513 u163 The parts without symbol number are not service. http://www.xiaoyu163.com...
  • Page 34 1-0036-7073S WIRE(AL) X-0363-7006S MOTOR ASSY 1-0363-7001S MUTE SW 1-0036-7007-1S SLIDE SW 1-0363-7008S SLIDE SW PWB 1-0036-7034S POWER SW u163 1-0036-7089S 6P WIRE ASY(JVC 1-0036-7088S 5P WIRE ASY(JVC 2-1816-0032-E8S MYLAR WASHER(S) (x2) 2-1812-0030-D2S PSW-S (x3) 1-0036-5024S PSW(REEL) (x5) 2-1712-0050-16S E RING...
  • Page 35 http://www.xiaoyu163.com 3 7 63 1515 0 Symbol No. Part No. Part Name Description Local  1-0363-7015S MUTE SWITCH BOARD 2-1331-7040-C2S SCREW S 2-1331-7060-C2S SCREW S 2-1382-0030-C2S SCREW B (x5) 2-1332-0040-C1S SCREW S 2-1032-0070-C2S SCREW (x2) 2-1032-0025-C2S SCREW (x2) 2-1012-0040-C2S SCREW 2-1012-0030-F2S SCREW 1-0138-5002S...
  • Page 36 http://www.xiaoyu163.com 3 7 63 1515 0 Grease point 1/2 Grease FL-942 SW-902 SW-522B FG-84M EP-56 Reverse side L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 37 http://www.xiaoyu163.com 3 7 63 1515 0 Grease point 2/2 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 38 http://www.xiaoyu163.com 3 7 63 1515 0 Electrical parts list Main board Symbol  Part No. Part Name Description Local Block No. [0][1] C132 QERF1HM-105Z E CAPACITOR 1uF 50V M  Symbol Part No. Part Name Description Local C133 QERF1HM-105Z E CAPACITOR 1uF 50V M C134 QFV61HJ-823Z...
  • Page 39 http://www.xiaoyu163.com 3 7 63 1515 0 Symbol Symbol Part No. Part Name Description Local Part No. Part Name Description Local   QRE141J-103Y C RESISTOR 10kΩ 1/4W J R985 QRE141J-472Y C RESISTOR 4.7kΩ 1/4W J QRE141J-103Y C RESISTOR 10kΩ 1/4W J R990 QRE141J-103Y C RESISTOR...
  • Page 40 http://www.xiaoyu163.com 3 7 63 1515 0 Symbol Symbol Part No. Part Name Description Local Part No. Part Name Description Local   R613 NRSA63J-561X MG RESISTOR 560Ω 1/16W J CP722 QGA2002F1-06 CONNECTOR W-B (1-6) R614 NRSA63J-681X MG RESISTOR 680Ω 1/16W J CP901 QGB1214K1-06S CONNECTOR...
  • Page 41 http://www.xiaoyu163.com 3 7 63 1515 0 <MEMO> L 13942296513 u163 3-13 http://www.xiaoyu163.com...
  • Page 42 http://www.xiaoyu163.com 3 7 63 1515 0 Packing materials and accessories parts list Block No. No additional / supplemental order of WARRANTY CARDs are available. A3 A4 A5 A6 A7 A8 L 13942296513 KIT: A9 A10 A11 A12 A13 u163 3-14 http://www.xiaoyu163.com...
  • Page 43 http://www.xiaoyu163.com 3 7 63 1515 0 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  GE20137-203A MOUNTING SLEEVE GE20135-309A TRIM PLATE GET0286-001A INSTR BOOK CHI(PEKIN) GET0286-002A INSTALL MANUAL ------------ WARRANTY CARD BT-59019-1 BT-59020-1 SEAL BT-59022-3C SVC CENTER LIST E310162-001...