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JVC CH-X400 Service Manual
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JVC CH-X400 Service Manual

JVC CH-X400 Service Manual

Compact disc automatic changer
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Download this manual See also: Service Manual, Instruction Manual
SERVICE MANUAL
COMPACT DISC AUTOMATIC CHANGER
CH-X400 / CH-X450
Contents
Safety precaution
Important for laser products
Location of main parts
Removal of main parts
JC 12 Forced eject procedures
1-2
1-3
1-4
1-5
1-19
This service manual is printed on 100% recycled paper.
COPYRIGHT
2000 VICTOR COMPANY OF JAPAN, LTD.
Troubleshooting
Wiring connections
Pickup replacement procedure
Description of major ICs
CH-X400 / CH-X450
Area Suffix
CH-X400
J
Northern America
E
Continental Europe
CH-X450
U
Other areas
1-20
1-26
1-27
1-29
No.49585
Dec. 2000

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Summary of Contents for JVC CH-X400

  • Page 1 CH-X400 / CH-X450 SERVICE MANUAL COMPACT DISC AUTOMATIC CHANGER CH-X400 / CH-X450 Area Suffix CH-X400 Northern America Continental Europe CH-X450 Other areas Contents Safety precaution Troubleshooting 1-20 Important for laser products Wiring connections 1-26 Location of main parts Pickup replacement procedure...

  • Page 2: Safety Precaution

    CH-X400/CH-X450 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. Please use enough caution not to see the beam directly or touch it in case of an...
  • Page 3 CH-X400/CH-X450 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam.

  • Page 4: Location Of Main Parts

    CH-X400/CH-X450 Location of main parts Main board ass'y Mechanism ass'y wire Bottom view Positioning motor ass'y Jack board ass'y Sensor board ass'y Mechanism board ass'y Top side view Mechanism & lifter unit Magazine house section Remove the main board view...
  • Page 5 CH-X400/CH-X450 Removal of main parts Disassembling procedures Perform operations according to the items to be disassembled. Replacement of the Pickup 1. After removing the exterior (top and bottom)... 2. Proceed to the "Pickup Replacement" section. 3. When applying grease, refer to the Exploded View.
  • Page 6 CH-X400/CH-X450 Removing the top cover 1. Pull out the dampers, being careful not to damage. When reattaching a damper, insert your finger to push out the center of the damper to mount it on the damper shaft, as shown in Fig. 6-1.
  • Page 7 CH-X400/CH-X450 Removing the fittings 1. Remove the fixing screw (5). 2. Unhook the two catches (a) on the top edge of the fitting, then unhook the catches (b) at the left/right bottom edges. Catches (a) Catches (b) Fitting Removing the main PCB assembly Fig.
  • Page 8 CH-X400/CH-X450 Changer mechanism section Sensor assembly unit 1. Remove the two screws (1) securing the sensor assembly Sensor unit. assembly 2. Unhook the springs on the back of the sensor assembly unit from the holes on the chassis. Magazine lock arm 1.
  • Page 9 CH-X400/CH-X450 Rear slider Can be removed at the stud position 1. Position the unit with the front section facing down. Rotate (at the widest hole) the third gear located on the back of the main unit in the Remove direction of the arrow (clockwise).
  • Page 10 CH-X400/CH-X450 Lifter unit 1. Unhook the elevator spring located on the front side of the unit. (Be sure to first unhook the spring from the lifter side as shown in the upper part of the diagram.) 2. Lift the lifter unit upward, then remove the lower rod to Unhook this remove the lifter unit from the chassis.
  • Page 11 CH-X400/CH-X450 Pickup assembly 1. Remove the three mechanism PCB fixing screws (6) located on the back of the traverse mechanism. 2. Disconnect the two feed motor wires (blue and white), two Pickup flexible PCB spindle motor wires (red and black) and two tray motor...
  • Page 12 CH-X400/CH-X450 Tray motor 1. Remove the two screws (11) securing the tray motor. 2. Remove the two screws (12) to remove the tray motor assembly from the tray motor holder. Separation of the chassis L assembly and ahassis R assembly 1.
  • Page 13 CH-X400/CH-X450 Precautions on reassembling When reassembling, also refer to the disassembling procedures. Pickup assembly Attached to chassis Mounting the traverse mechanism 1. When mounting the pickup assembly, attach the feed slide shaft assembly to the traverse chassis. Apply E-JC-525 grease to the shaft.
  • Page 14 CH-X400/CH-X450 Mounting the lifter unit 1. Insert the shafts (B) of the traverse mechanism assembly into the slide grooves (F) on the lifter unit. 2. Shift the hook of the lifter unit to the edge, and shift the sliding lever inside the side bracket unit to the edge as well.
  • Page 15 CH-X400/CH-X450 Connection of the chassis "L" assembly and chassis "R" assembly 1. Attach the lower rod to the chassis "R" assembly. While shifting the rod toward the front side, mount the rod on the lifter unit. With the rod mounted, place the lifter unit on the chassis "R"...
  • Page 16 CH-X400/CH-X450 Mounting the top plate 1. Mount the upper rod on the lifter side (j) and set it on the rear of the top plate, then mount the other end of the upper rod to (k). 2. Check that the five points (l, m, n, o and p) are correctly positioned.
  • Page 17 CH-X400/CH-X450 Mounting the front slider and rear slider 1. Position the unit with the rear side facing down, then rotate the third gear in the direction of the arrow (clockwise) until the lift arm comes to the position at which the holes are exposed, as shown in Fig.
  • Page 18 CH-X400/CH-X450 Mounting the sensor PCB assembly 1. Attach the longer spring to the white resin, and attach the shorter spring temporarily to the sensor assembly bracket. 2. Mount the sensor assembly so that the shaft of the lift arm is inserted into the longer hole on the white resin located on the back of the sensor PCB assembly.
  • Page 19 CH-X400/CH-X450 JC12 Forced eject procedures Magazine eject does not function. Completed RESET (Press EJECT for 3 sec.) Check that the trays remain no more than 10 mm inside the magazine. Are trays stored in the magazine? Check visually. Remove the bottom cover...

  • Page 20: Troubleshooting

    CH-X400/CH-X450 Troubleshooting Servicing procedures for CH-X400 & CH-X450 error displays Error display Servicing procedure E1: Eject error The magazine cannot be ejected until S601 (magazine switch) turns off. Can the magazine be ejected? YES 1, NO 1 The magazine switch (S601) does not turn off even though the magazine is completely ejected.
  • Page 21 CH-X400/CH-X450 CH-X400 & CX-H450 Error code The following error codes can be displayed and stored in up to 3 memories when the KD-MX3000 is used with the controller. Refer to the KD-MX3000 service manual regarding error code indication. The error code indication when using the earlier controller is the same as the CH-X99,KD-MK88 and other 12CD changer models.
  • Page 22 CH-X400/CH-X450 Flow chart for reading TOC (Table of contents) Power ON • When the laser diode correctly Set Function to CD • When the pickup correctly moves emits to the inner area of the disc Microprocessor Microprocessor Disc inserted commands...

  • Page 23: General Section

    CH-X400/CH-X450 General section Turn the power on with no magazine loaded. Reset Move the lifter until it The lifter moves up or Check the linear position comes to the STOP down and stops. sensor (VR601). position (shipping position). The position motor does Check the wiring of the not function.
  • Page 24 CH-X400/CH-X450 Feed section Is the voltage output at Is the wiring for IC521 Is 5V present at IC581 Check CD 9V IC521 pin u 5V or 0V? (90) (100) correct? pin 6? and 5V. Check the vicinity of IC521. Is 4V present at both...
  • Page 25 CH-X400/CH-X450 Signal processing section Is the sound output from No sound from either Compare the L-ch and both channels (L, R)? channel. R-ch to locate the defective point. Normal Is 9V present at IC101 pin Check the vicinity of the...

  • Page 26: Wiring Connections

    CH-X400/CH-X450 Wiring connections Sensor Ass'y CN503 CN904 CN601 WJM0017-002A Connect Board CN903 Spindol Motor Ass'y Feed Motor Ass'y Tray Motor Ass'y Mechanism Board Ass'y (SURFACE SIDE) CN501 CN502 Pick Up Ass'y LV30450-003A Wiring of mechanism board section 1-26...
  • Page 27 CH-X400/CH-X450 Pickup replacement procedure Third gear 1. Remove the bottom cover, front panel and top cover from the exterior section. Main PCB 2. Unplug the flexible ribbon wire from connector CN502 assembly on the traverse mechanism PC board assembly. 3. Turn the rear slider and third gear in the lifter section counterclockwise until the traverse mechanism assembly is in the lowermost (bottom) position.
  • Page 28 CH-X400/CH-X450 10. Remove the two rack arm fixing screws (4). Grounding point Pull out the feed slide shaft. Remove the shaft holder fixing screw (5). Pickup 11. When mounting the lifter bracket after replacing the pickup, shift the lifter unit lever approx. 30 mm towards the inside, then mount the lifter bracket.
  • Page 29 CH-X400/CH-X450 Descriprion of major ICs BA5926S(IC581):CD/POSITION/TRAY DRIVER 1.Terminal layout & Block diagram BIAS 13.3K x3/8 x3/8 13.3K LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT T.S.D LEVEL SHIFT LEVEL SHIFT 13.3K LEVEL SHIFT x3/8 x3/8 13.3K T.S.D: Thermal shut down circuit D: Driver buffer Unit of resistor:[ 2.Pin function...
  • Page 30 CH-X400/CH-X450 UPD780058GC-067(IC601):CPU 1.Terminal layout 2.Block diagram TO0/P30 16-bit TIMER/ TI00/INTP0/P00 PORT0 P01-P06 EVENT COUNTER1 TI01/INTP1/P01 PORT1 TO1/P31 P10-P17 8-bit TIMER/ TI1/P33 EVENT COUNTER1 TO2/P32 PORT2 P20-P27 8-bit TIMER/ TI2/P34 EVENT COUNTER2 P30-P37 PORT3 WATCDOG TIMER PORT4 P40-P47 WATCH TIMER SI0/SB0/P25...
  • Page 31 Memory power detect input Unused output port PWR SW CRTL+B detect input BUSOUT JVC bus output BUS INT JVC bus com start interrupt input CD ON CD power control Hi:on EJECT Eject key input PWR CONT Power supply control output Hi:on...
  • Page 32 CH-X400/CH-X450 TC9462F(IC521): DSP&DAC 1.Pin layout & Block Diagram 50 V Servo 49 TRO 1bit control Clock 48 FOO generator TEZI 46 TEI 45 TSIN TEST1 44 SBAD Digital equalizer TEST2 43 FEI Address circuit Automatic adjustment TEST3 42 RFRP circuit...
  • Page 33 CH-X400/CH-X450 2.Pin Function TC9462F(2/2) Symbol Function Pin No. RFRP signal center level input terminal RFCT RFRP zero cross input terminal RFZI RF ripple signal input terminal RFRP Focus error signal input terminal Sub-beam adder signal input terminal SBAD Test input terminal Normally, keep at "vref" level TSIN Tracking error signal input terminal.
  • Page 34 CH-X400/CH-X450 TA2109F-X (IC501) : RF amp. 1. Pin layout 2. Block diagram 15k ohm 30k ohm 7.67k ohm 15k ohm 10k ohm SBAD 10k ohm 20uA 50k ohm 30k ohm 20pF 36pF 10k ohm 10k ohm 21k ohm 29k ohm 2VRO 7.96k ohm...
  • Page 35 CH-X400/CH-X450 BA15218F-XE (IC101) : CD LPF 1. Pin layout OUT1 1 8 Vcc -IN1 2 7 OUT2 +IN1 3 6 -IN2 VEE 4 5 +IN2 2. Block diagram OTHER Q114 OUTPUT 1-35...
  • Page 36 CH-X400/CH-X450 BR24CO1AF(IC604):EP ROM 1.Terminal Layout 2.Block Diagrram VCC TEST SCL SDA 1,024bit EEPROM Array 8 VCC BR24C01AF 8bit 7bit Slave Word Data Address 7 TEST 7bit Decoder Address Register Register START STOP 6 SCL Control logic High Voltage Gen. Vcc level detect 5 SDA 3.Pin Function...
  • Page 37 CH-X400/CH-X450 HD74HC126FP-X (IC651) : Buffer 1.Terminal layout 3.Pin function Input Outout 2.Block diagram Output Input Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 Output Sample as Load Circuit 1 IC-PST600M/G/-W1197(IC602):Reset 1.Terminal layout 2.Block diagram Vout 1-37...
  • Page 38 CH-X400 / CH-X450 VICTOR COMPANY OF JAPAN, LIMITED MOBILE ELECTRONICS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan Printed in Japan (No.49585) 200012(V)

  • Page 39: Parts List

    PARTS LIST [ CH-X400 ] [ CH-X450 ] * All printed circuit boards and its assemblies are not available as service parts. Areas suffix CH-X400 E ----------- Continental Europe J ------------- Northern America Areas suffix CH-X450 U --------------------- Other Areas...
  • Page 40 CH-X400/CH-X450 Exploded view of general assembly and parts list Block No. Jack board Silver...
  • Page 41 CH-X400/CH-X450 Parts list (General assembly) Block No. M1MM Item Parts number Parts name Q'ty Description Area --------------- CD CHANGER MECHA LV41843-001A LASER CAUTION CH-X400E,X450U LV20065-002B-SK FITTING LV40706-003A CAUTION LABEL QYSDST2004Z SCREW LV10407-004A TOP COVER CH-X450U LV10407-006A TOP COVER CH-X400E/J VYSH101-031...
  • Page 42 CH-X400/CH-X450 CD changer mechanism assembly and parts list Block No. LEN-320M Grease No.: JC-525 CFD-931 Bottom side Bottom side Bottom side CFD-931 The edge part on the back side Both CFD-9 31 side LEN- 320M Bottom side CFD-931 A Bottom side...
  • Page 43 CH-X400/CH-X450 Parts list (CD changer mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area LV30928-201A TRA MECHA UNIT LV30096-002A CHASSIS(L) ASSY LV30097-001A CHASSIS(R) ASSY QYSDST2004Z SCREW QYSDST2004Z SCREW LV40129-003A MOTOR BKT ASS'Y PPN13KA10C-SA5 MOTOR ASS'Y WJM0017-001A E-SI C WIRE C-F...
  • Page 44 CH-X400/CH-X450 Parts list (CD changer mechanism) Block No. M2MM Item Parts number Parts name Q'ty Description Area LV40474-002A ELEVATOR SPRING OPTIMA-720L1 C.D PICK (CAR) FF050SK11170SA2 DC MOTOR QUB456-04A2A2 WIRE(F.MOTOR) QUB459-05A2A2 WIRE(F.MOTOR) LV40155-001A MIDDLE GEAR LV40156-001A S.S. GEAR LV40157-001A SCREW SHAFT...
  • Page 45 CH-X400/CH-X450 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area C 101 QERF1CM-106Z E CAPACITOR 10MF 20% 16V C 605 QERF0JM-476Z E CAPACITOR 47MF 20% 6.3V C 102...
  • Page 46 CH-X400/CH-X450 Electrical parts list (Main board) Block No. 01 Item Remarks Item Remarks Parts number Parts name Area Parts number Parts name Area Q 921 2SC2412K/R/-X TRANSISTOR R 602 NRS181J-103X MG RESISTOR Q 922 2SA1037AK/R/-X TRANSISTOR R 603 NRSA63J-472X MG RESISTOR...
  • Page 47 CH-X400/CH-X450 Packing materials and accessories parts list Block No. A1 A7 Block No. KIT: A11,A12 P5 1/2 P5 1/2...
  • Page 48 CH-X400/CH-X450 Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area QPA01703505P POLY BAG INSTRUCTIONS QPA00801205 POLY BAG SCREW KIT QPC03005120P POLY BAG LV32482-001A CARTON CH-X450U LV32480-001A CARTON CH-X400E/J LV10504-001A CUSHION LV30453-003A ACCESSARY BOX LV30575-002A SEPALATOR...

This manual is also suitable for:

Ch-x450