JVC KS-FX945R Service Manual
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JVC KS-FX945R Service Manual

JVC KS-FX945R Service Manual

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3 7 63 1515 0
SERVICE MANUAL
6
2003
49875
TE
L 13942296513
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
5
TROUBLE SHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-24
6
DESCRIPTION OF MAJOR ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
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CASSETTE RECEIVER
KS-FX945R
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SOUND
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SOURCE
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VOL
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TABLE OF CONTENTS

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COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LIMITED
http://www.xiaoyu163.com
2 9
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1 3
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EE --------- Russian Federation
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2 8
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Area Suffix
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No.49875
9 9
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2003/6

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  • Page 1: Table Of Contents

    3 7 63 1515 0 SERVICE MANUAL CASSETTE RECEIVER 49875 2003 KS-FX945R SOUND SOURCE L 13942296513 Area Suffix EE --------- Russian Federation TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .

  • Page 2: Http://Www.xiaoyu163.Com

    http://www.xiaoyu163.com 3 7 63 1515 0 SPECIFICATION AUDIO AMPLIFIER Maximum Power Front 50 W per channel SECTION Output Rear 50 W per channel 19 W per channel into 4 Ω 40 Hz to 20 000 Hz at Continuous Power Front Output (RMS) no more than 0.8% total harmonic distortion.

  • Page 3: Precaution

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 1 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.49875)1-3...

  • Page 4: Specific Service Instructions

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SEVICE INSTRUCTIONS. L 13942296513 u163 1-4 (No.49875) http://www.xiaoyu163.com...

  • Page 5: Disassembly

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 3 DISASSEMBLY Main body 3.1.1 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 3.1.2 Removing the bottom cover (See Fig.2) •...
  • Page 6 http://www.xiaoyu163.com 3 7 63 1515 0 3.1.4 Removing the heat sink (See Fig.5) • Prior to performing the following procedure, remove the front panel assembly as required. (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 7 http://www.xiaoyu163.com 3 7 63 1515 0 3.1.7 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 8 http://www.xiaoyu163.com 3 7 63 1515 0 3.1.9 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 nine joints g, the front panel assembly and rear cover become separate.
  • Page 9 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 3.2.1 Removing the cassette guide (See Fig.2)
  • Page 10 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.3 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 11 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.4 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 12 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.5 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. 3.2.6 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 13 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.8 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 14 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.10 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 15 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.13 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 16 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.15 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. 3.2.16 Removing the mode switch actuator (See Fig.26, 27 and 29) (1) Pull out the mode switch actuator at the bottom.
  • Page 17 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.19 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 18 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.21 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 19 http://www.xiaoyu163.com 3 7 63 1515 0 3.2.22 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 20: Adjustment

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 4 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 21 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 22 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 23 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 A line ment VT703 (10kHz) using a mirror tape, remove the cassette housing from the mechanism chassis.

  • Page 24: Trouble Shooting

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 5 TROUBLE SHOOTING This service manual does not describe TROUBLE SHOOTING. L 13942296513 u163 1-24 (No.49875) http://www.xiaoyu163.com...

  • Page 25: Description Of Major Ics

    http://www.xiaoyu163.com 3 7 63 1515 0 SECTION 6 DESCRIPTION OF MAJOR ICs 6.1 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 26 http://www.xiaoyu163.com 3 7 63 1515 0 CXA2560Q (IC401) : Dolby B type noise reduction system with play back equalizer amp. • Pin layout & block diagram 7k/12k PBFB2 MSMODE 100k OFF/B DRSW PBRIN2 300k MS MODE BIAS PBGND TAPESW MUTE PBFIN2 MUTESW TAPE EQ...
  • Page 27 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 28 http://www.xiaoyu163.com 3 7 63 1515 0 6.6 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 LC75873NW (IC601):LCD Driver • Pin layout • Block diagram VDD1 COMON SEGMENT DRIVER DRIVER VDD2 CLOCK SHIFT REGISTOR GENERATOR ADDRESS DETECTOR • Pin function L 13942296513 Pin No. Pin name Description 79,80 S1/P1 to S4/P4 O Segment outouts for displaying the display data transferred by serial data input.
  • Page 30 http://www.xiaoyu163.com 3 7 63 1515 0 LA47505 (IC301) : Power amp. • Terminal layout Protective circuit Stand by Switch L 13942296513 Ripple Mute Filter circuit protective circuit Muting & On Time Control Circuit u163 1-30 (No.49875) http://www.xiaoyu163.com...
  • Page 31 http://www.xiaoyu163.com 3 7 63 1515 0 • Terminal layout • Pin function Pin No. Symbol Function AC CONT1 Header of IC GND1 Power GND OUTFR- Outpur(-) for front Rch STBY Stand by input OUTFR+ Output (+) for front Rch Vcc1/2 Power input OUTRR- Output (-) for rear Rch...
  • Page 32 http://www.xiaoyu163.com 3 7 63 1515 0 6.10 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 33 http://www.xiaoyu163.com 3 7 63 1515 0 6.11 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 34 http://www.xiaoyu163.com 3 7 63 1515 0 6.12UPD784215AGC209 (IC701) : CPU • Pin layout • Pin function Pin No Symbol Function TAPE IN Cassette tape inside signal H:Inside L:Outside STAND BY Stand-by position detection signal input H:Loading L:Eject side 3 to 8 Not use Micon power supply RESET...
  • Page 35 http://www.xiaoyu163.com 3 7 63 1515 0 Pin No Symbol Function E2PROM-CLK E.VOL I2C clock output OPEN DOOR OPEN SW 49,50 Not use 51,52 Not use SD/ST Station detector or stereo indicator input ; H means a station is there. L means the program is stereo. Not use MONO Monaural selection output ;...
  • Page 36 http://www.xiaoyu163.com 3 7 63 1515 0 6.13 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 POWER DETECTOR SUPPLY VOLUME 1...
  • Page 37 http://www.xiaoyu163.com 3 7 63 1515 0 L 13942296513 u163 (No.49875)1-37 http://www.xiaoyu163.com...
  • Page 38 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.49875) Printed in Japan http://www.xiaoyu163.com...

  • Page 39: Schematic Diagrams

    KS-FX945R 3 7 63 1515 0 SCHEMATIC DIAGRAMS CASSETTE RECEIVER KS-FX945R CD-ROM No.SML200306 SOUND SOURCE L 13942296513 Area Suffix EE --------- Russian Federation Contents Block diagram Standard schematic diagrams Printed circuit boards 2-5 to 7 u163 No.49875SCH COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.

  • Page 40: Safety Precaution

    KS-FX945R 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 41: Block Diagram

    KS-FX945R 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 42 KS-FX945R KS-FX945R 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 1/50 R247 C244 R244 R241 R248 IC301 0.22 C242 LA47505 22/16...
  • Page 43 KS-FX945R 3 7 6 3 1 5 1 5 0 LCD & Key control section LCD1 IC602 RPM6938-SV4 ACC5V R660 CN601 QNZ0006-001 LCD1 REMOCON QLD0257-001 EN601 R661 QSW0976-001 ENC1 IC601 1 3 9 4 2 2 9 6 5 1 3...
  • Page 44 KS-FX945R KS-FX945R 3 7 6 3 1 5 1 5 0 Head amp section Q403 2SB1322/RS/-T R401 Q402 UN2211-X CN403 QGF1219F1-10S 0.015 C411 R418 1 3 9 4 2 2 9 6 5 1 3 22/16 C409 IC401 CXA2560Q R416 1.5M...
  • Page 45 KS-FX945R 3 7 63 1515 0 Printed circuit boards Main board Forward side IC901 J321 Q351 Q341 Q321 Q331 J801 L901 CP401 CN901 D901 R901 C308 C318 L 13942296513 C319 C309 IC161 IC31 R706 R760 R762 IC701 C705 X701...
  • Page 46 KS-FX945R 3 7 63 1515 0 Main board Reverse side CN901 J321 IC901 R902 D901 CP401 IC301 C326 C325 R901 Q701 R161 R163 R164 R162 C308 C318 Q976 R302 Q977 C309 C319 R312 L 13942296513 C243 R307 Q241 R306...
  • Page 47 KS-FX945R 3 7 63 1515 0 Front board Forward side LCD1 S614 IC602 D620 D602 D603 D605 R614 S605 R604 D604 D619 D601 R603 R602 S604 S615 S613 D606 D616 D617 D610 D611 D613 D612 S603 D609 S608 D615...
  • Page 48 KS-FX945R 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.49875SCH) 2003/06 http://www.xiaoyu163.com...

  • Page 49: Parts List

    3 7 63 1515 0 PARTS LIST [ KS-FX945R ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix EE --------- Russian Federation L 13942296513 - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 4 Cassette mechanism assembly and parts list (Block No.MP)
  • Page 50 http://www.xiaoyu163.com 3 7 63 1515 0 Exploded view of general assmbly and parts list Block No. L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 51 http://www.xiaoyu163.com 3 7 63 1515 0 General assembly  Symbol No. Part No. Part Name Description Local Block No. [M][1][M][M] QYSDSF2606Z SCREW 2.6mm x 6mm  Symbol No. Part No. Part Name Description Local QYSDST2606Z SCREW 2.6mm x 6mm GE40172-002A IC BRACKET GE40124-001A REG BRACKET...
  • Page 52 http://www.xiaoyu163.com 3 7 63 1515 0 Cassette mechanism assembly and parts list Block No. CDS-802JE3 L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 53 http://www.xiaoyu163.com 3 7 63 1515 0 Cassette mechanism  Symbol No. Part No. Part Name Description Local Block No. [M][P][M][M] 2-1821-0040-D2S PSW-S 2.1 (x3)  Symbol No. Part No. Part Name Description Local 2-1711-5040-16S E RING 2-1031-7030-C2S SCREW (x2) X-0802-1009S MAIN CHASSIS AS X-0802-1002S SLIDE CHASSIS A...
  • Page 54 http://www.xiaoyu163.com 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 55 http://www.xiaoyu163.com 3 7 63 1515 0 Grease point 2/2 L 13942296513 u163 http://www.xiaoyu163.com...

  • Page 56: Electrical Parts List

    http://www.xiaoyu163.com 3 7 63 1515 0 Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] D901 1N5401-F64 DIODE  Symbol No. Part No. Part Name Description Local D902 1SS355-X SI DIODE D903 1SS355-X SI DIODE D981...
  • Page 57 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local C182 QERF1EM-475Z E CAPACITOR 4.7uF 25V M NRS181J-100X MG RESISTOR 10Ω 1/8W J C183 QERF1EM-475Z E CAPACITOR 4.7uF 25V M NRSA63J-471X MG RESISTOR...
  • Page 58 http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local R717 NRSA63J-0R0X MG RESISTOR 0Ω 1/16W J CN701 QNZ0007-002 CAR CONNECTOR R718 NRSA02J-683X MG RESISTOR 68kΩ 1/10W J CN901 QNZ0112-001 CAR CONNECTOR...

  • Page 59: Front Board

    http://www.xiaoyu163.com 3 7 63 1515 0  Symbol No.  Symbol No. Part No. Part Name Description Local Part No. Part Name Description Local VR401 QVP0009-333Z TRIM RESISTOR 33kW R620 NRS181J-821X MG RESISTOR 820Ω 1/8W J VR402 QVP0009-333Z TRIM RESISTOR 33kW R621 NRSA02J-821X...
  • Page 60 http://www.xiaoyu163.com 3 7 63 1515 0 Packing materials and accessories parts list Block No. A1 A2 A4 A5 L 13942296513 KIT:A6 A7 A8 A9 A10 u163 3-12 http://www.xiaoyu163.com...
  • Page 61 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 GET0122-001A INST BOOK ENG RUS GET0122-002A INSTALL MANUAL ENG RUS LV40978-001A CAUTION SHEET BT-54013-6 WARRANTY CARD VND3046-001 SERIAL TICKET VKZ4027-202 PLUG NUT VKH4871-001SS...

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