JVC MX-KB4 Service Manual

Compact component system

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Page 1: Table Of Contents
SERVICE MANUAL COMPACT COMPONENT SYSTEM MB196 2004 MX-KB4 Area suffix J ---------------------------- U.S.A. C ------------------------- Canada STANDBY/ON SLEEP FM MODE FM /AM REPEAT PROGRAM /RANDOM TAPE TAPE SOUND VOLUME MODE FADE MUTING RHYTHM AX REMOTE CONTROL SP-MXKB4 CA-MXKB4 SP-MXKB4 TABLE OF CONTENTS PRECAUTION.
Page 2 SPECIFICATION Amplifier Output Power 180 W per channel, min. RMS, driven into 6 at 1kHz, with no more than 10% total harmonic distortion Input Sensitivity/Impedance (1 kHz) AUX IN:400 mV/50 k Speaker terminals 6 - 16 Phones - 1 k Cassette Deck Frequency Response 15 mW/ch output into 32...
Page 3: Precaution
SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
Page 4 Preventing static electricity Electrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laser diode in the traverse unit (optical pickup). Take care to prevent this when performing repairs. 1.5.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as laser products.
Page 5 Importance administering point on the safety Caution: For continued protection against risk of fire, replace only with same type 3.5A/125V for F901 and 1.6A/250V for F902. This symbol specifies type of fast operating fuse. Precaution: Pour eviter risques de feux, remplacez le fusible de surete de F901 comme le meme type que 3.5A/125V et 1.6A/250V pour F902.
Page 6: Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB196)
Page 7: Disassembly
SECTION 3 DISASSEMBLY Disassembly of the main blocks of the set Replacement of the fuses and the power IC 3.1.1 Replacing the fuses (See Fig.1) • Prior to performing the following procedure, remove the left side board. (1) Replace the fuses inside. Fuse (F902) Fuse (F901) 1.6A 250V...
Page 8 3.1.4 Removing the top cover (See Fig.4 and 5) (1) Remove six screws C that retain the top cover from the Top cover panel rear of the body. (2) Remove six screws D that retain the top cover from the two sides of the body.
Page 9 3.1.5 Removing the CD changer unit (See Fig.6 to 9) • Prior to performing the following procedures, remove the top cover. Caution: Although the CD mechanism unit can be removed without re- Antenna moving the CD tray panel, it is still recommended to remove it terminal in order to prevent damage.
Page 10 3.1.6 Removing the front panel assembly (See Fig.10 to 11) • Prior to performing the following procedures, remove the top cover. • Also remove the CD changer unit. (1) Disconnect the parallel wire and the cord wire from the con- nectors CN701, CN101 on the power amp.
Page 11 Disassembly of units and assembly inside this set 3.2.1 Removing the Main board (See Fig.12 to 13) • Prior to performing the following procedures, remove the top PAIN PCB cover. • Also remove the CD changer unit. CN603B CN604 (1) Disconnect the wires from CN603A, on the Main board, which is located on the back side of the CD changer unit.
Page 12 3.2.2 Removing the CD changer mechanism assembly (See Fig.14 to 15) • Also remove the CD changer unit. CD changer (1) Turn the CD changer mechanism cover base and remove unit the screws d connecting the unit to the CD changer mech- anism assembly.
Page 13 3.2.3 Removing the CD pickup (See Fig.16) • Prior to performing the following procedures, remove the top CD pickup cover. • Also remove the CD changer unit. • Also remove the CD changer mechanism. (1) Widen the section f. (2) While keeping the section f wide open, push the section g in the direction of the arrow to remove the shaft, and then remove the CD pickup.
Page 14 3.2.6 Removing the cassette deck mechanism (See Fig.19) • Prior to performing the following procedures, remove the top cover. Front panel • Also remove the CD changer unit. assembly • Also remove the front panel assembly. (1) Remove six screws Z retaining the cassette deck mecha- nism.
Page 15 3.2.9 Removing the Switch board and sound mode and CD function switch board (See Fig.20 to 23) • Prior to performing the following procedures, remove the top cover. Front panel assembly • Also remove the CD changer unit. • Also remove the front panel assembly. (1) Pull out the volume control knob from the front of the front panel assembly.(Fig.22) (2) Remove six screws Q retaining the front panel assembly.
Page 16 3.2.10 Removing the cassette deck main motor, and replacing the main belts (See Fig.19, 24 and 25) • Prior to performing the following procedures, remove the top Cassette deck mechanism cover and both sides board. (Front side) • Also remove the CD changer unit. •...
Page 17 3.2.12 Removing the cassette deck heads (See Fig. 19 and 27) • Prior to performing the following procedures, remove the top Cassette deck mechanism cover and both sides board. (Front side) • Also remove the CD changer unit. • Also remove the front panel assembly. (1) Remove six screws Z that retain the cassette deck mecha- nism.
Page 18 3.2.14 Removing the Power amp and Supply board and the Power trans board (See Fig. 3, 29 to 31) • Prior to performing the following procedures, remove the top cover and CD changer unit. (1) Remove four screws B from the rear panel. (Fig.3) Fuse (F902) Fuse (F901) (2) Pull the heat sink cover outward.
Page 19: Adjustment
SECTION 4 ADJUSTMENT Measurement Instruments Required for Adjustment (1) Low frequency oscillator 4.2.2 Standard measurement position of volume and This oscillator should have a capacity to output 0dBs to switch 600 at an oscillation frequency of 50Hz-20kHz. Power Standby (2) Attenuator impedance : 600 (Light STANDBY Indicator) (3) Electronic voltmeter Sound Turbo,A,BASS EX...
Page 20 Arrangement of adjusting positions Cassette deck mechanism (Front side) PB Head REC/PB Head (Deck-A) (Deck-B) Head azimuth screw Head azimuth screw (Forward side) (Forward side) Head azimuth screw Head azimuth screw (Reverse side) (Reverse side) 4.3.1 Tape recorder section Adjusting Measurement Standard Items...
Page 21: Troubleshooting
SECTION 5 TROUBLESHOOTING Flow of functional operation until TOC read Check Point Slider turns REST Confirm that the voltage at the pin5 Play Key Power ON SW ON. of CN702 is "H"\"L"\"H". Automatic tuning of TE offset Check that the voltage at the Laser ON pin10 of IC701 is + 0V? Detection of disc...
Page 22 Maintenance of laser pickup Replacement of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn off the power switch and,disconnect the with a alcohol soaked cotton swab. power cord from the AC OUTLET. (2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear.
Page 23 (No.MB196)1-23...
Page 24 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB196) Printed in Japan...
Page 25 SCHEMATIC DIAGRAMS COMPACT COMPONENT SYSTEM MX-KB4 CD-ROM No.SML200406 STANDBY/ON SLEEP FM MODE FM /AM REPEAT PROGRAM /RANDOM TAPE TAPE SOUND VOLUME MODE FADE RHYTHM AX MUTING REMOTE CONTROL SP-MXKB4 CA-MXKB4 SP-MXKB4 Area suffix J ---------------------------- U.S.A. C ------------------------- Canada Contents...
Page 26 In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( diode ( ) and ICP ( ) or identified by the " " mark nearby are critical for safety. (This regulation does not correspond to J and C version.)
Page 27 Wiring diagram...
Page 28 Block diagrams...
Page 29 Standard schematic diagrams Main amp. / Power supply section Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
Page 30 Function control section...
Page 31 System control section...
Page 32 FL / Key control section...
Page 33 CD / MP3 control section...
Page 34 Tuner section...
Page 35 Printed circuit boards Main board (forward side)
Page 36 Main board (reverse side) 2-10...
Page 37 Front board (forward side) 2-11...
Page 38 Front board (reverse side) 2-12...
Page 39 Amp board (forward side) Amp board (reverse side) 2-13...
Page 40 Power trans board 2-14...
Page 41 < M E M O >...
Page 42 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MB196SCH)
Page 43: Parts List
PARTS LIST [ MX-KB4 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix J ----------------------------- U.S.A. C -------------------------- Canada - Contents - 3 - 2 Exploded view of general assembly and parts list (Block No.M1) 3 - 5 CD changer mechanism assembly and parts list (Block No.MA)
Page 44: Exploded View Of General Assembly And Parts List
Exploded view of general assembly and parts list Block No. VFD board CD door board Front bo...
Page 45 Main board Amp. board board F902 F901 Power trans. board...
Page 46 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  BI1077280101U1 COVER CASS L HIPS 470 BI1077260101U1 BOX CASS L HIPS 470 BI1077300101U1 LENS CASS L SAN2495 BI1077310101U1 LENS CASS R SAN2495 BI103362020102 RUBBER FOOT (x2) BI1077270101U1 BOX CASS R HIPS 470...
Page 47 CD changer mechanism assembly and parts list Block No. CMS-FR3BN 9 10...
Page 48 CD changer mechanism Block No. [M][A][M][M] Symbol No. Part No. Part Name Description Local  BIAJ7200601J BASE-MAIN BIAJ6100601P BRKT-CHUCK BI3302000158 MAGNET-FERRITE BIAJ7200601L TABLE-CHUCK BIAJ6300601A SHEET-CHUCK (x3) BIAJ7300601B BELT-LOAD BIAJ6600601N GEAR-SYNCRO BIAJ6600601L GEAR-CONVERT BIAJ6600601M GEAR-TRAY BIAJ6600601R GEAR-CAM BIAJ6600601K GEAR-LOAD BIAJ6600601J GEAR-PULLEY BIAJ7200601N SLIDER-CAM BI3405000101...
Page 49 Cassette mechanism assembly and parts list Block No. ADR268DSW...
Page 50 Cassette mechanism Block No. [M][P][M][M] Symbol No. Part No. Part Name Description Local  BIMT9201010K PINCH ARM F (x2) BIMT7200022A ARM PINCH F BI6107000353 S/P PINCH F BIMT7300010A ROLLER PINCH BI6107000177 S/P P/R F (x2) BIMT9222010C CLUTCH ASSY (x2) BIMT7200391A BUSH C BIMT7200387A PULLEY C...
Page 51 Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1][0][0] UZ3.6BSB Z DIODE BI3UZ3.6BSBM000  Symbol No. Part No. Part Name Description Local 1SS133 FR DIODE BI31SS133M0007 1SS133 FR DIODE BI31SS133M0007 D301 1SS133 FR DIODE BI31SS133M0007 LA1823...
Page 52 Amp. board  Symbol No. Part No. Part Name Description Local Block No. [0][3][0][0] X801 BI2102361 CRYSTAL 16.9344MHz XT301 BI2101012 CRYSTAL 32.768KHz  Symbol No. Part No. Part Name Description Local XT302 BI29ZTA8.00P015 C. RESONTOR 8MHz XXXXX BI251290G01V MAIN PWB IC601 STK412-030 BI115001...
Page 53  Symbol No. Part No. Part Name Description Local XXXXX BI202603010101 HLDR THMS XXXXX BI12P20205U WIRE 2P L=60mm Power trans board Block No. [0][4][0][0]  Symbol No. Part No. Part Name Description Local  C951 BICT224275M CAPACITOR 0.22UF 275V P=2.5mm CW902 BI12P90062V WIRE...
Page 54: Packing Materials And Accessories Parts List
Packing materials and accessories parts list Block No. 3-12...
Page 55 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  BI4032603U SAFTEY CARD BI4032823 WARRANTY CARD BT520062 BI4032613U REGIST CARD BT510341 BI4412931U INST BOOK LVT1215-002A ENG FRE BI4412821U INST BOOK LVT1215-001B ENG ------------ BATTERY (x2) BIAN01012 ANT WIRE BIAN01031...

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JVC MX-KB4 Service Manual

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