JVC ca-mxkb4, Service Manual

Page 1: ...ABLE OF CONTENTS 1 PRECAUTION 1 3 2 SPECIFIC SERVICE INSTRUCTIONS 1 6 3 DISASSEMBLY 1 7 4 ADJUSTMENT 1 19 5 TROUBLESHOOTING 1 21 FM MODE FM AM AUX SLEEP STANDBY ON CD1 CD2 CD3 SOUND MODE RHYTHM AX FADE MUTING VOLUME PROGRAM RANDOM REPEAT TAPE A CD TAPE B REMOTE CONTROL CA MXKB4 SP MXKB4 SP MXKB4 Area suffix J U S A C Canada ...

Page 2: ...se Ratio 85 dB Wow And Flutter Unmeasurable Tuner FM Tuner Tuning Range 87 5 MHz 108 0 MHz AM Tuner Tuning Range 530 kHz 1 710 kHz Unit Dimensions 270 mm 306 mm 456 mm W H D 10 11 16 12 1 16 18 Mass Approx 8 6 kg 19 0 lbs Speaker Specifications SP MXKB4 each unit Type 3 way bass reflex type Speaker Unit Woofer 20 cm 7 7 8 cone 1 Mid 5cm 2 cone 1 Tweeter 2 cm 13 16 dome 1 Power Handling Capacity 18...

Page 3: ...ack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particular ly any exposed metal part having a return path to the chassis to a known good...

Page 4: ...he laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 6 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Cut off the shorted part of the flexible cable using nippers etc after replacing the optical pickup For specific details refer to the replacemen...

Page 5: ...f 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 Ce sont des fusibles suretes qui functionnes rapide ...

Page 6: ...1 6 No MB196 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS ...

Page 7: ...de Caution Be sure to use fuses with the specified ratings Fig 1 3 1 2 Replacing the power IC See Fig 2 Prior to performing the following procedure remove the top cover 1 Remove the two screws A from the heat sink between the power IC 2 Remove the solder fixing the power IC Fig 2 3 1 3 Replacing the heat sink cover See Fig 3 1 Remove four screws B from the rear panel 2 Pull the heat sink cover out...

Page 8: ...retain the top cover from the panel rear of the body 2 Remove six screws D that retain the top cover from the two sides of the body 3 Remove the top cover from the body by lifting it toward the rear Fig 4 Fig 5 Top cover C C C Right Front panel assembly D D Left Front panel assembly D D ...

Page 9: ...push in the sections marked with arrows and pull out the CD tray toward the front b Remove the CD tray panel by pushing both of its extremi ties upward in the direction of the arrows c Push the CD tray deep into the set 1 Disconnect the cord wires from the CD board CN703 and CN203 2 From the rear of the set remove two screws E two screws F and four screws G on the front panel left and right side 3...

Page 10: ...tors CN701 CN101 on the power amp PCB 2 Remove one screws H retaining the front panel assembly onto the bottom of the body 3 Remove two screws I on the left and right side of the set re taining the panel front from the bottom and then remove then GND lug b that comes from the amp and supply board 4 Disengage the claws c on both sides of the front panel as sembly and then remove the assembly Fig 10...

Page 11: ...d on the back side of the CD changer unit 2 The four screws J that retain the CD board should be re moved 3 Remove the CD board by pulling it toward the side where the CN601 is located 4 Using solder short the CD pickup to connect to short round Caution After re connecting the wires be sure to remove the shorting solder from the GND connection 5 Disconnect the card wire from the connector CN601 on...

Page 12: ... connecting the unit to the CD changer mech anism assembly 2 Removing four screws e retaining the CD mechanism hold er assembly Caution When replacing the CD changer mechanism assembly be sure not to mistake the positions of the silver color and copper color spring Fig 14 Fig 15 d CD changer unit e Green color e Red color e Green color e Red color CD changer mechanism assembly ...

Page 13: ...r tray loading motor 2 Remove the two screws M retaining the gear plate and take it out after remove the rotor belt from the pulley Fig 17 3 2 5 Replacing the CD turn table and removing the motor See Fig 18 Prior to performing the following procedures remove the top cover Also remove the CD changer unit 1 Remove the one screws retaining the CD Turn table 2 Remove the two screws retaining the stopp...

Page 14: ...the following procedures remove the top cover Also remove the CD changer unit Also remove the front panel assembly 1 Remove two screws P that retains the Key open board 2 Remove three screws L that retains the Key REC board Fig 20 3 2 8 Removing the Display board See Fig 21 Also remove the CD changer unit Also remove the front panel assembly 1 Remove six screws Q that retain the Display board from...

Page 15: ...ront 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 3 Remove the Control FL board 4 Remove eleven screws retaining the Switch key 1 board Fig 20 5 Remove two screws S retaining the sound mode and CD function key 2 switch board Fig 21 Fig 22 Fig 23 Volume knob Front panel assembly Front pan...

Page 16: ...layback only and cas sette B record play main belts are different When at taching the main belts use the longer belt for cassette A Fig 24 Fig 25 3 2 11 Removing the leaf switches of the cassette deck mechanism See Fig 19 and 26 Prior to performing the following procedures remove the top cover and both sides board Also remove the CD changer unit Also remove the front panel assembly 1 Remove the si...

Page 17: ...wire 4 Remove screws U that retains the head 5 Remove screws V that retains the head 6 Hold the head and slide it in the direction of the arrow to re move it Fig 27 3 2 13 Removing the 3 pin regulator and bridge diode See Fig 28 Prior to performing the following procedures remove the top cover and both sides board Remove two screws A that connect the heat sink 1 Remove two screws A that connect th...

Page 18: ...e heat sink holder 4 Remove four screws YY that retains the rear panel and then remove the rear panel 5 Disconnect the parallel wires from the connectors FW951 on the Power trans board 6 Remove screws Z that retain the Power amp and Supply board and then remove the assembly 7 Remove the clamp of AC power cord from the chassis 8 Remove four screws that retain the Power trans board and then remove t...

Page 19: ...ice there is no need to adjust this sweeper 4 Since a ceramic oscillator is used there is no need to perform any MIX adjustment 5 Since a fixed coil is used there is no need to adjust the FM tracking 6 The input and output earth systems are separated In case of simultaneously measuring the voltage in both of the input and output systems with an electronic voltmeter for two channels therefore the e...

Page 20: ...output 80kHz 3kHz Adjust the head azimuth screw only when the head has been changed Use the High Impedance Probe or Frequency counter input Cassette Head Azimuth Alignments Recording Bias FrequencyAlignment Items Measurement conditions Measurement method Standard values Adjusting positions 1 Set the Signal Generator signal to 530KHz the feed to Loop Antenna 2 Receiving the signal and the adjust th...

Page 21: ...g finishes Automatic measurement of TE amplitude and automatic tuning of TE balance 500mv div 2ms div Fig 1 Approx 3sec pin 20 of IC611 TE Approx 0 3V VREF Tracking error waveform at TOC reading Power ON Play Key Confirm that the Focus error S cuve signal at the pin31 of IC701 is approx 2Vp p Confirm that the signal from pin26 IC701 is 0V as a accelerated pulse during approx 400ms Confirm the wave...

Page 22: ...ck do not touch the semi fixed resistor If the laser power is lower than the specified value the la ser diode is almost worn out and the laser pickup should be replaced If the semi fixed resistor is adjusted while the pickup is functioning normally the laser pickup may be damaged due to excessive current 5 3 Replacement of laser pickup Is the level of RFOUT under 0 48V 0 1Vp p Replace it NO YES O ...

Page 23: ... No MB196 1 23 ...

Page 24: ... No MB196 AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan VICTOR COMPANY OF JAPAN LIMITED WPC Printed in Japan ...

Page 25: ... No SML200406 Contents FM MODE FM AM AUX SLEEP STANDBY ON CD1 CD2 CD3 SOUND MODE RHYTHM AX FADE MUTING VOLUME PROGRAM RANDOM REPEAT TAPE A CD TAPE B REMOTE CONTROL CA MXKB4 SP MXKB4 SP MXKB4 Area suffix J U S A C Canada Wiring diagram 2 1 Block diagram 2 2 Standard schematic diagrams 2 3 Printed circuit boards 2 9 to 13 ...

Page 26: ...e 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: ...2 1 Wiring diagram ...

Page 28: ...2 2 Block diagrams ...

Page 29: ...2 3 Parts are safety assurance parts When replacing those parts make sure to use the specified one Standard schematic diagrams Main amp Power supply section ...

Page 30: ...2 4 Function control section ...

Page 31: ...2 5 System control section ...

Page 32: ...2 6 FL Key control section ...

Page 33: ...2 7 CD MP3 control section ...

Page 34: ...2 8 Tuner section ...

Page 35: ...2 9 Main board forward side Printed circuit boards ...

Page 36: ...2 10 Main board reverse side ...

Page 37: ...2 11 Front board forward side ...

Page 38: ...2 12 Front board reverse side ...

Page 39: ...2 13 Amp board forward side Amp board reverse side ...

Page 40: ...2 14 Power trans board ...

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 No MB196SCH Printed in Japan WPC ...

Page 43: ...M1 CD changer mechanism assembly and parts list Block No MA Cassette mechanism assembly and parts list Block No MP Electrical parts list Block No 01 04 Packing materials and accessories parts list Block No M3 Note Parts number of normal capacitors and normal resistors doesn t listed on the parts list MX KB4 3 2 3 5 3 7 3 9 3 12 Area suffix J U S A C Canada MB196 ...

Page 44: ...Exploded view of general assembly and parts list Block No M M M 1 1 2 42 40 41 9 35 36 3 4 5 37 38 39 6 7 10 12 13 49 50 50 50 11 51 51 8 16 47 46 CD door board Front bo VFD board 17 15 31 34 30 48 32 48 50 ...

Page 45: ...3 3 14 49 18 19 21 22 23 47 24 46 25 46 47 48 46 47 46 46 27 Amp board Power trans board Main board board 44 45 F901 43 46 F902 48 48 48 ...

Page 46: ...R PT901 21 BI202553010101 HLDR HT SINK L SBCC T 0 80mm 22 BI202560010101 HLDR HT SINK R SBCC T 0 80mm 23 BI202556010102 HEAT SINK AL T 3 0mm 24 BI107483010101 COVER HT SINK HIPS 470 25 BI2025500611U1 PANEL REAR SBCC T 0 80mm 27 BI202548010101 METAL COVER SBCC T 0 60mm 30 BI1077340101U1 KEY CLOCK ABS 700 31 BI1077450101U1 KEY RECORD ABS 700 32 BI1077480101U1 KEY BOOSTER ABS 700 34 BI1077360101U1 LE...

Page 47: ...3 5 CD changer mechanism assembly and parts list CMS FR3BN Block No M M M A 7 6 2 13 1 3 4 17 16 14 15 19 21 22 18 20 5 37 38A 37 38A 37 38B 37 38B 36 39 32 24 23 25 26 27 29 28 34 33 35 12 11 8 9 10 ...

Page 48: ...BI3711003379 CONNECTOR HEADE 16 BIAJ4100601K PCB SW 17 BIAJ6100601K PULLEY MOTOR 1X4 18 BIAJ3100601F MOTOR DC 19 BI3710001248 CONNECTOR SOCE 20 BI3711003692 CONNECTOR HEADE 21 BI3708001163 CONNECTOR FPC 22 BIAJ4100601L PCB MECHA 23 BIAJ7200601P TRAY ROULETTE 1X2 24 BIAJ7200601Q TRAY DISC 1X2 25 BIAJ6600601Q GEAR ROULETTE 1X4 26 BIAJ6600601P GEAR WORM 1X2 27 BIAJ3100601K MOTOR LOADING 28 BIAJ630060...

Page 49: ...9 9 10 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 27 28 28 29 25 4 5 26 3 3 25 2 2 1 2 3 1 4 1 4 2 4 6 4 6 4 2 4 3 4 3 4 4 4 5 5 1 5 2 5 3 4 5 4 4 4 4 3 2 3 3 3 4 3 4 1 3 1 1 ADR268DSW 1 4 1 4 6 1 6 3 6 4 6 2 2 1 2 2 2 3 2 4 2 6 2 7 2 5 30 ...

Page 50: ...TOR 3 0Kohm x2 5 BIMT9115013Y MOTOR ASSY 5 1 BIMT72K0028A PULLEY M T 5 2 BI3101K0019A MOTOR EG 530AD 2B D 5 3 BI3809001038 MOTOR WIRE 6 BIMT9003010J BASE HEAD B x2 6 1 BIMT7000376A BASE HEAD B 6 2 BIMT7100161A SHAFT BASE S 6 3 BI6107000335 SPR SUB 6 4 BIMT7000468A BASE SUB HEAD 7 BIMT72K0016A CHASSIS MAIN 8 BIMT7000438E PLATE SPRING x2 9 BIMT7200383A CHIP REEL x4 10 BIMT7200384A BASE REEL x4 11 BI...

Page 51: ... D12 1SS133 FR DIODE BI31SS133M0007 D13 UZ3 6BSB Z DIODE BI3UZ3 6BSBM000 D14 1SS133 FR DIODE BI31SS133M0007 D15 1SS133 FR DIODE BI31SS133M0007 D301 1SS133 FR DIODE BI31SS133M0007 D302 1SS133 FR DIODE BI31SS133M0007 D303 1SS133 FR DIODE BI31SS133M0007 D304 1SS133 FR DIODE BI31SS133M0007 D305 1SS133 FR DIODE BI31SS133M0007 D306 UZ4 7BSA Z DIODE BI3UZ4 7BSAM000 D307 1SS133 FR DIODE BI31SS133M0007 D30...

Page 52: ...52010101 VFD HOLDER x2 XXXXX BI202579010101 SENSOR HOLDER XXXXX BI301923010101 RUBBER VFD x2 XXXXX BI1206341V FLAT CABLE 2P x2 XXXXX BI1206351V FLAT CABLE 8P Symbol No Part No Part Name Description Local Symbol No Part No Part Name Description Local IC601 STK412 030 IC BI115001 Q601 2SC3052F TRANSISTOR BI2SC3052FA013H Q603 DTA114YK TRANSISTOR BI2DTA114YKA011 Q604 KTB1366Y TRANSISTOR BI2KTB1366Y8V ...

Page 53: ...IRE 2P L 60mm Symbol No Part No Part Name Description Local C951 BICT224275M CAPACITOR 0 22UF 275V CW902 BI12P90062V WIRE P 2 5mm L 140mm XXXXX BI201196010101 FUSE HOLDER CX NV300 XXXXX BI201323010101 TERMINAL 1P XXXXX BI251289G01V PWR TRANS PWB Symbol No Part No Part Name Description Local ...

Page 54: ...3 12 Packing materials and accessories parts list Block No M M M 3 P9 P2 P4 P8 P7 P6 P10 P1 P5 P3 A1 A8 A10 A9 A5 A7 A6 A2 A3 ...

Page 55: ... BATTERY x2 A 6 BIAN01012 ANT WIRE A 7 BIAN01031 AM LOOP ANT A 8 BI600MXKB4050 REMOTE CONTROL A 9 MXKB4 SPBOX R SPEAKER R A 10 MXKB4 SPBOX L SPEAKER L P 1 BI4314201U CARTON C P 1 BI4313931U CARTON J P 2 BI4710312U POLY BAG INST BOOK P 3 BI4710572U POLYBAG LOOP ANT P 4 BI4005355 BAG PV P 5 BI4512831U POLYFORM LEFT UNIT P 6 BI4512841U POLYFORM RIGHT UNIT P 7 BI4511451 SH FOAMED MAT P 8 BI4710322U PO...