JVC KS-LH4R Service Manual
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JVC KS-LH4R Service Manual

JVC KS-LH4R Service Manual

Cassette receiver
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QQ
3 7 63 1515 0
SERVICE MANUAL
TE
L 13942296513
Contents
www
.
http://www.xiaoyu163.com
CASSETTE RECEIVER
KS-LH4R
SOUND
U
R
SOURCE
F
D
VOL
VOL
Safety precaution
Disassembly method
Adjustment method
Description of major ICs
x
ao
u163
y
i
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
http://www.xiaoyu163.com
2 9
8
TAPE
Q Q
3
6 7
1 3
1 5
co
.
KS-LH4R
9 4
2 8
0 5
8
2 9
9 4
2 8
Area Suffix
E ----------- Continental Europe
1- 2
1- 3
1-17
1-20~30
m
9 9
9 9
No.49725
Mar. 2002

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  • Page 1 KS-LH4R 3 7 63 1515 0 SERVICE MANUAL CASSETTE RECEIVER KS-LH4R SOUND SOURCE TAPE L 13942296513 Area Suffix E ----------- Continental Europe Contents Safety precaution 1- 2 Disassembly method 1- 3 Adjustment method 1-17 Description of major ICs 1-20~30 u163 No.49725...

  • Page 2: Safety Precaution

    KS-LH4R 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 3: Disassembly Method

    KS-LH4R 3 7 63 1515 0 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 Removing the front chassis (See Fig.2 to 4)
  • Page 4 KS-LH4R 3 7 63 1515 0 Removing the bottom cover (See Fig.6) 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-LH4R 3 7 63 1515 0 Removing the cassette mechanism assembly Cassette mechanism assembly (See Fig.9) 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 G attaching the cassette mechanism assembly from the top cover.
  • Page 6 KS-LH4R 3 7 63 1515 0 <Cassette mechanism section> REFERENCE: Prior performing 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 Removing the reinforce bracket (See Fig.1 and 2)
  • Page 7 KS-LH4R 3 7 63 1515 0 Removing the load arm (See Fig.5) Load arm Remove the E-washer attaching the load arm. Move the load arm in the direction of the arrow and release the joint e on the cassette catch.
  • Page 8 KS-LH4R 3 7 63 1515 0 Removing the side bracket assembly Side bracket assembly (See Fig.10 to 12) Joint l Remove the screw C attaching the side bracket assembly. Joint m Detach the front side of the side bracket assembly upward and pull out forward to release the joint l and m in the rear.
  • Page 9 KS-LH4R 3 7 63 1515 0 Removing the pinch arm (F) assembly (See Fig.13 and 14) Remove the polywasher and pull out the pinch arm (F) assembly. Remove the compulsion spring. Polywasher Pinch arm Polywasher Pinch arm (F) assembly...
  • Page 10 KS-LH4R 3 7 63 1515 0 Removing the head / tape guide (See Fig.18 and 19) Slide chassis assembly REFERENCE: It is not necessary to remove the slide chassis assembly. Remove the band attaching the wire to the head.
  • Page 11 KS-LH4R 3 7 63 1515 0 Disassembling the flywheel assembly (F) (See Fig.22 and 23) Push and turn counterclockwise the spring holder (F) Flywheel assembly (F) Flywheel assembly (R) to release the three joints s on the bottom of the flywheel.
  • Page 12 KS-LH4R 3 7 63 1515 0 Removing the gear base arm / gear base Gear base arm Joint w link assembly (See Fig.27 to 29) Joints v Move the gear base arm in the direction of the arrow. Hook x...
  • Page 13 KS-LH4R 3 7 63 1515 0 Mode gear Mode switch actuator Removing the mode gear (See Fig.30 and 33) Remove the polywasher on the bottom and pull out the mode gear. Removing the mode switch actuator Polywasher (See Fig.30, 31 and 33) Pull out the mode switch actuator at the bottom.
  • Page 14 KS-LH4R 3 7 63 1515 0 Slot f' Removing the gear base assembly / take up gear / reflector gear (See Fig.34 to 36) Push in the pin e’ of the gear base assembly on the upper side of the body and move the reflector gear toward the bottom, then pull out.
  • Page 15 KS-LH4R 3 7 63 1515 0 Removing the side bracket assembly (See Fig.37 to 41) Remove the eject cam plate spring. Push the joint g‘ through the slot to remove the load rack downward. Joint g' Move the eject cam limiter in the direction of the arrow to release it from the boss h’...
  • Page 16 KS-LH4R 3 7 63 1515 0 Main motor Removing the main motor assembly / assembly sub motor assembly (See Fig.42 to 44) Reduction gear (B) Belt Reduction Remove the belt at the bottom. gear (A) Remove the polywasher and pull out the mode gear.

  • Page 17: Adjustment Method

    KS-LH4R 3 7 63 1515 0 Adjustment method Frequency Range Test Instruments reqired for adjustment 1.Digital osclloscope(100MHz) FM : 87.5 MHz to 108.0 MHz 2.Frequency Counter meter 3.Electric voltmeter AM :(MW) 522 kHz to 1620 kHz 4.Wow & flutter meter (LW) 144kHz to 279 kHz 5.Test Tapes...
  • Page 18 KS-LH4R 3 7 63 1515 0 Arrangment of adjusting Head amplifier board section (Reverse side) VR401:Rch VR402:Rch (Dolby NR Frequency response adj) (Dolby NR level adj) C418 R412 C413 C419 C416 C414 C421 R416 C422 R414 C412 VR401 Q401...
  • Page 19 KS-LH4R 3 7 63 1515 0 Item Adjustment and check method Adjust Spec 1.Tape position Playback at FWD side, use the mirror tape and Azimuth adjuste azimuth screw A and B, check the tape screw A position at tape guide position of the head.

  • Page 20: Description Of Major Ics

    KS-LH4R 3 7 63 1515 0 Description of major ICs HA13164A (IC901) : Regulator 1.Terminal layout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 2.Block diagram 100u 0.1u BATT.DET OUT ANT OUT Surge Protector 0.1u...
  • Page 21 KS-LH4R 3 7 63 1515 0 HD74HC126FP-X (IC801) : Buffer 1.Terminal layout 3.Pin function Input Output Note) H:High level L:Low level X:Irrelevant Z:Off(High-impedance) State a 3-state input 2.Block diagram Output Input L 13942296513 Output Sample as Load Circuit 1...
  • Page 22 KS-LH4R 3 7 63 1515 0 UPD178018AGC621 (IC701) : CPU 1. Pin layout 2. Pin function Pin No. Port Name Descriptions Key input 0 KEY 0 KEY 1 Key input 1 KEY 2 Key input 2 LEVEL Level meter input S.meter level input...
  • Page 23 KS-LH4R 3 7 63 1515 0 UPD178018AGC621(2/2) Pin No. Port Name Descriptions FF/REW Output for input signal level switching for MS L : FF,REW H : PLAY FWD,REV running direction switch signal input DOLBY Dolby on "H" output MSIN...
  • Page 24 KS-LH4R 3 7 63 1515 0 LA47503 (IC351) : Power amp. 1.Terminal layout Protective circuit L 13942296513 Stand by Switch Ripple Mute Filter circuit protective circuit Muting & u163 On Time Control Circuit 1-24 http://www.xiaoyu163.com...
  • Page 25 KS-LH4R 3 7 63 1515 0 2.Terminal layout 3.Pin function LA47503 Pin No. Symbol Function Header of IC AC CONT1 Power GND GND1 Outpur(-) for front Rch OUTFR- Stand by input STBY Output (+) for front Rch OUTFR+ Power input...
  • Page 26 KS-LH4R 3 7 63 1515 0 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...
  • Page 27 KS-LH4R 3 7 63 1515 0 LC75873NW (IC601) : LCD driver 1.Pin layout 2.Block diagram VDD1 COMON SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTOR GENERATOR ADDRESS DETECTOR 3.Pin function Description Pin No. Pin name Segment outouts for displaying the display data...
  • Page 28 KS-LH4R 3 7 63 1515 0 SAA6579T-X (IC51) : RDS 1.Pin layout QUAL RDCL RDDA Vref OSCO OSCI TEST SCOUT MODE 2.Block diagram ANTI- 57 kHz OSCILATOR QUALITY BIT RECONSTRUCTION ALIASING BANDPASS GENERATOR FILTER FILTER (8th ORDER) DIVIDER COSTAS LOOP...
  • Page 29 KS-LH4R 3 7 63 1515 0 TEA6320T-X (IC301) : E.VOLUME 1.Terminal Layout 2.Block Diagram VOLUME 2 MUTE 0 to 55 dB FUNCTION BALANCE OUTRR OUTLR ZERO CROSS FENDER REAR POWER DETECTOR OUTRF OUTLF SUPPLY VOLUME 1 BASS TREBLE +20 to -31 dB...
  • Page 30 KS-LH4R 3 7 63 1515 0 GP1UM261XK (IC602) : Receiver 1. Pin layout Vout 2. Block diagram Limiter B.P.F. Integrator Demodulator Comparator GND Vdd Vout LB1641 (IC402) : DC motor driver L 13942296513 2. Pin function 1. Pin layout...
  • Page 31 KS-LH4R 3 7 63 1515 0 < M E M O > L 13942296513 u163 1-31 http://www.xiaoyu163.com...
  • Page 32 KS-LH4R 3 7 63 1515 0 L 13942296513 u163 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,371-8543,Japan 200203 (No.49725) http://www.xiaoyu163.com...

  • Page 33: Power Amp

    http://www.xiaoyu163.com 3 7 6 3 1 5 1 5 0 MOTOR SWITCH MAIN TAPE END.STANDBY MOTOR HEAD CJ402 CJ403 TO SPEAKER MOTOR METAL TO CD CHANGER CONNECTOR TO REAR LINE OUT TAPE IN MODE J801 CP901 J321 STANDBY TAPE END IC401 REEL L/R F...
  • Page 34 KS-LH4R 3 7 63 1515 0 < M E M O > L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 35: Standard Schematic Diagrams

    KS-LH4R 3 7 6 3 1 5 1 5 0 Standard schematic diagrams Main amp section LA4743K IC301 J321 C321 0.22 C322 R301 0.22 C308 2.2/50 QNB0100-001 C309 R302 1/50 2.2/50 TU.R 1/50 4.7u TU.L 0.1/50 2SC2412K/R/-X C318 R311 2.2/50...
  • Page 36 KS-LH4R KS-LH4R 3 7 6 3 1 5 1 5 0 Mecha control section Q403 2SB1322/RS/-T R401 Q402 DTC114EKA-X CJ403 QGF1219F1-10 0.015 C411 R418 22/16 C409 IC401 CXA2559Q 1 3 9 4 2 2 9 6 5 1 3 R416 1.5M...
  • Page 37 KS-LH4R 3 7 6 3 1 5 1 5 0 LCD & Key control section LCD1 IC602 GP1UM261XK ACC5V QNZ0006-001 R660 CN601 REMOCON LCD1 EN601 R661 QSW0863-002 ENC2 ENC1 R662 3.3k LCDCE 1 3 9 4 2 2 9 6 5 1 3 3.3k...

  • Page 38: Printed Circuit Boards

    KS-LH4R KS-LH4R 3 7 6 3 1 5 1 5 0 Printed circuit boards Main board(Reverse side) Main board(Forward side) C905 L901 CP901 IC901 C904 J321 IC901 C911 Q351 J321 L901 B303 J801 J801 R910 D901 D901 R341 C327...
  • Page 39 KS-LH4R 3 7 63 1515 0 Macha control board C419 C418 R412 C413 C416 C414 C421 R416 C422 R414 C412 VR401 Q401 R415 C410 R418 VR402 R413 B402 IC401 FSMW1093A C411 R423 R422 B409 B404 CJ403 IC402 R425 CJ401...

  • Page 40: Parts List

    KS-LH4R 3 7 63 1515 0 PARTS LIST [ KS-LH4R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix E ----------- Continental Europe 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 41: Exploded View Of General Assembly And Parts List

    KS-LH4R 3 7 63 1515 0 Exploded view of general assembly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 42 KS-LH4R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area CASSETTE MECHA 1 CDS-802JE1 --------------- SHEET FSYH4036-050 FSKL2001-004 MECHA BRACKET L FSKL2002-002 MECHA BRACKET R QYSDST2606Z SCREW QYSDST2606Z...

  • Page 43: Eject Button

    KS-LH4R 3 7 63 1515 0 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area GE40138-001A NAV GUIDE GE40132-001A VOL KNOB PRESET BUTTON 1 1-6 LASER CUT GE20129-001A FSYH4036-069 SHEET RIM LENS GE30387-001A...

  • Page 44: Cassette Mechanism Assembly And Parts List

    KS-LH4R 3 7 63 1515 0 Cassette mechanism assembly and parts list Block No. CDS-802JE1 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 45 KS-LH4R 3 7 63 1515 0 Parts list (Cassette mechanism) Block No. MPMM Item Parts number Parts name Q'ty Description Area MAIN CHASSIS AS X-0802-1009S SLIDE CHASSIS A X-0802-1002S X-0802-1003S SIDE BKT ASSY X-0802-1004S CASSETTE HANGER X-0802-1005S PINCH ARM F ASS...
  • Page 46 KS-LH4R 3 7 63 1515 0 Parts list (Cassette mechanism) Block No. MPMM Item Parts number Parts name Q'ty Description Area 1-0802-4007S GEAR BASE SPG 1-0802-4008S REEL DRIVER SPG COMPULSION SPG 1-0802-4013S BELT 1-0802-5001S FELT 1 7.5*18.5*1.0 1-0802-5002S 1-0802-5003S...
  • Page 47 KS-LH4R 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-LH4R 3 7 63 1515 0 Grease point 2/2 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 49 KS-LH4R 3 7 63 1515 0 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 305 NCB31EK-104X C CAPACITOR...
  • Page 50 KS-LH4R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area D 705 MTZJ5.6B-T2 ZENER DIODE NRSA63J-473X MG RESISTOR D 706 MTZJ5.6B-T2...
  • Page 51 KS-LH4R 3 7 63 1515 0 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area R 332 NRSA63J-102X MG RESISTOR R 892 NRSA02J-102X MG RESISTOR R 333...
  • Page 52 KS-LH4R 3 7 63 1515 0 Electrical parts list (Mecha control board) Block No. 02 Item Parts number Parts name Remarks Area C 401 NDC31HJ-101X C CAPACITOR C 402 NDC31HJ-101X C CAPACITOR C 403 NDC31HJ-101X C CAPACITOR C 404...
  • Page 53 KS-LH4R 3 7 63 1515 0 Electrical parts list (Front board) Block No. 03 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NBE20JM-475X TS E CAPACITOR R 622 NRSA02J-122X MG RESISTOR...
  • Page 54 KS-LH4R 3 7 63 1515 0 < M E M O > L 13942296513 u163 3-15 http://www.xiaoyu163.com...

  • Page 55: Packing Materials And Accessories Parts List

    KS-LH4R 3 7 63 1515 0 Packing materials and accessories parts list Block No. Block No. A2~A6 L 13942296513 P1 A1 KIT:A8~A12 u163 3-16 http://www.xiaoyu163.com...
  • Page 56 KS-LH4R 3 7 63 1515 0 Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area FSPG4002-001 POLY BAG 2 INST. BOOK QPA00801205 POLY BAG 1 KIT POLY BAG 1 HARD CASE QPA01003003 FSYH4036-068 SHEET...

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