Jvc-CHX-1500-CD-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD. No.49776 2003/01 CH-X1500 CD CHANGER 49776200301 CH-X1500 TABLE OF CONTENTS 1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2 2Disassembl

2、y method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4 3Adjustment method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-

3、22 4Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-30 Area Suffix J Northern America E Continental Europe U Other Areas RadioFans.CN 收音机爱 好者资料库 CH-X1500 1-2 SECTION 1 Important Safety Precautions

4、 1.1 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. ! Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation chec

5、k. ! This unit can only be connected to the JVC car receivers/controllers equipped with MP3-CD changer control functions. If connected to any other receiver/controller, this unit cannot work (even CDs may not play back). RadioFans.CN 收音机爱 好者资料库 CH-X1500 1-3 1.2 Preventing static electricity Electros

6、tatic 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. 1.2.1 Grounding to prevent damage by static electricity Static electricity

7、 in the work area can destroy the optical pickup (laser diode) in devices such as DVD players. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbench Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate o

8、ver it before placing the traverse unit (optical pickup) on it. (2) Ground yourself Use an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser d

9、iode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easily destroy the laser diode.

10、 1.3 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 r

11、eplacement procedure in the text. Remove the anti-static pin when replacing the traverse unit. Be careful not to take too long a time when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi

12、-fixed resistor that adjusts the laser power. Do not turn it. 1.4 Attention when traverse unit is decomposed *Please refer to Disassembly method in the text for the CD pickup unit. Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit. (If t

13、he flexible wire is disconnected without applying solder, the CDpickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land after connecting the flexible wire. 1M (caption) Anti-static wrist strap Conductive material (conductive sheet) or iron plate

14、Flexible wire Sorting round point Pickup RadioFans.CN 收音机爱 好者资料库 CH-X1500 1-4 SECTION 2 Disassembly method Perform operations according to the items to be disassembled. 2.1 Replacement of the Pickup (1) After removing the exterior (top and bottom). (2) Proceed to the 2.5.8.Pickup replacement procedu

15、re sec- tion. (3) When applying grease, refer to the Exploded View. Use new grease. 2.2 Mechanism Section (1) Remove the exterior (required section only). (2) The mechanism section is designed so that each unit can be removed separately. (3) When reassembling, refer to 2-5.Precautions reassem- bling

16、. (Use new grease when applying grease.) 2.3 Exterior Section 2.3.1Removing the bottom cover and front panel assem- bly (See fig.14) (1) Remove the screw A to unlock the mounting direction knob located on the side of the main unit. (2) Turn the mounting direction knob in the direction of the ar- row

17、 using a coin, etc. to remove it. (The knob can be re- moved only when it is set to this position.) (3) Remove the four screws B attaching the bottom cover on both sides of the main unit. (4) Turn the unit upside down so the bottom surface is facing upward. (5) Lift the rear edge of the bottom cover

18、 slightly and lift the side by grasping the DIN jack section on the side panel, then turn it toward the front (raise upward) to remove the bottom cover. (6) Release the four joints on both sides of the front panel, and turn the front panel toward the top cover (lower down) to remove the front panel.

19、 Fig.1 Fig.2 Fig.3 Fig.4 BB BAB Bottom cover ABB BB Bottom cover Bottom cover DIN jack Joints Joints CH-X1500 1-5 2.3.2Removing the top cover (See fig.59) (1) Pull out the dampers, being careful not to damage them. REFERNCE: When reattaching a damper, insert your finger to push out the center of the

20、 damper to mount it on the damper shaft, as shown in Fig. 6-1. (2) Turn the damper spring bracket toward the top at a right angle as shown in Fig. 7, then push down the lower side of the damper spring bracket to lift it off. (3) Remove the three screws C and D attaching the DIN jack board assembly,

21、and remove. (4) Lift the changer unit upward. (5) Remove the damper springs from the mechanism chassis if required. REFERENCE: To reassemble, refer to the diagram below. Fig.5 Fig.6 Fig.6-1 Fig.7 Fig.8 Fig.9 Fig.9-1 Damper Damper Damper shaft Damper Push out with your finger before attaching Apply a

22、lcohol to the shaft then immediately attach the damper. (After attaching, check that the shaft is correctly inserted.) Damper spring bracket Turn to the top position (at a right angle) ,then the push down to lift off. DIN jack board D C D Remove the card wire if required Changer unit Mechanisum chas

23、sis Damper spring Black (Magazine side) Damper spring Silver (Mechanisum side) CH-X1500 1-6 2.3.3Removing the fitting (See fig.10) (1) Remove the screw E attaching the fitting. (2) Release the two joints a on the top edge of the fitting, then release the joints b at the left / right bottom edges, an

24、d remove. Fig.10 2.3.4Removing the main board assembly (See fig.11) (1) Remove the screw F attaching the power IC. (2) Remove the four screws G attaching the main board as- sembly, and remove. (3) Disconnect the wire from connector CN602 on the main board assembly. (4) Disconnect the wire from conne

25、ctor CN501 on the main board assembly. (5) Disconnect the card wire from connector CN604 on the traverse mechanism board assembly. Fig.11 E a b b GG F G CN501 CN602 Main board assembly CN604 CH-X1500 1-7 2.4 Changer-mechanism section 2.4.1Remove the sensor assembly unit (See fig.12) (1) Remove the t

26、wo screws H attaching the sensor assembly unit. (2) Release the springs on the back of the sensor assembly unit from the holes on the chassis. 2.4.2Remove the magazine lock arm (See fig.12,13) (1) Remove the magazine lock spring from the front side of the chassis. (2) Remove the poly-washer attachin

27、g the magazine lock arm. (3) Turn the magazine lock arm in the direction of the arrow until the notch is at the c position to remove it from the chassis. Fig.12 Fig.13 2.4.3Remove the positioning motor assembly (See fig.14) (1) Remove the two screws I attaching the positioning motor. ATTENTION: When

28、 removing the positioning motor assembly from chassis, remove the spacer attaching the wires. (2) Slightly lift the positioning motor assembly to remove it from the two burrs on the chassis. Fig.14 H H Spring Sensor assemblyMagazine lock arm Magazine lock springMagazine lock arm Poly-washer c Positi

29、oning motor assembly Spacer I Burrs CH-X1500 1-8 2.4.4Remove the rear slider (See fig.15) (1) Position the unit with the front section facing down. Rotate the third gear located on the back of the main unit in the direction of the arrow (clockwise). (2) Move the rear slider in the direction of the a

30、rrow and re- move it at the rear slider mounting position (at the widest hole). Fig.15 2.4.5Remove the front slider (See fig.16) (1) Position the unit with the rear section facing down. Rotate the third gear located on the bottom of the unit in the direc- tion of the arrow (clockwise) until the fron

31、t slider is moved to the outermost position. (2) Remove the E-washer attaching the front slider, and re- move from the chassis. Fig.16 Third gear Rear slider Can be remove at the stud position (At the wideness position) Third gear Front slider E-washer CH-X1500 1-9 2.4.6Remove the top plate (See fig

32、.17,18) (1) Remove the nine screws J attaching the top plate. (2) Disconnect the section d attached to the rear of the unit, then lift the top plate slightly. (3) Move the top plate toward the rear of the unit to remove the upper rod from the top plate. Fig.17 Fig.18 J J J Rod Top plate d J Top plat

33、e CH-X1500 1-10 2.4.7Remove the lifter unit (See fig.19,20) (1) Remove the elevator spring located on the front side of the unit. (Be sure to first remove 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 re- mov

34、e the lifter unit from the chassis. Fig.19 Fig.20 Remove this part first Proper orientation Elevator spring Lower rod Lifter unit CH-X1500 1-11 2.4.8Remove the lifter bracket (See fig.21) (1) Remove the two screws K attaching the lifter bracket from the back of the lifter unit. (2) Remove the lower

35、rod. Fig.21 2.4.9Remove the side bracket and traverse mechanism assenbly (See fig.22) (1) Remove the two screws L attaching the side bracket, and remove the side bracket. (2) Remove the three shafts on the traverse mechanism as- sembly from the lifter unit. Fig.22 K KLifter bracket Lifter unit Trave

36、rse mechanism assembly Side bracket L L CH-X1500 1-12 2.4.10 Remove the pickup assembly (See fig.2326) CAUTION: When replacing the flexible wire connected, solder the short- ing round point. Otherwise, the pickup may be damaged. (1) Remove the three screws M attaching the mechanism board on the back

37、 of the traverse mechanism assembly. (2) Disconnect the two feed motor wires (blue and white), two spindle motor wires (red and black) and two tray motor wires (brown and black) that are soldered to the mecha- nism board assembly. (3) Move and lift mechanism board assembly with the flexible wire att

38、ached to connector CN603. Next, solder the sort- ing round point on the pickup assembly and then discon- nect CN603. (4) Remove the screw N attaching the feed motor assembly, and remove. (5) Remove the screw O attaching the shaft holder retaining the feed slide shaft assembly and the middle gear, an

39、d re- move. (6) Remove the middle gear. REFERENCE: Remove gears and motors only when required. (7) Move the pickup assembly upward from the gear section and remove it from the traverse chassis assembly. (8) Remove the two screws P attaching the rack arm, and re- move. (9) Pull out the feed slide sha

40、ft assembly, and remove. (10) Remove the screw Q attaching the spring, and remove. CAUTION: When reassembling, connect the flexible wire from the pickup to the main board and unsolder the shorting round point. Fig.23 Fig.24 Fig.25 Fig.26 M M Tray motor wire Flexible wire CN603Spindle motor wire Mech

41、anism board Feed motor Spindle motor Feed motor wire Flexible wire Sorting round point Pickup Pickup assembly Shaft holder Feed slide shaft assembly Middle gear Traverse chassis Feed motor O N Q P Spring Feed slide shaft assembly Lack arm CH-X1500 1-13 2.4.11 Removing the tray motor assembly (See fi

42、g.27, 28) (1) Remove the two screws R attaching the tray motor as- sembly, and remove. (2) Remove the two screws S attaching the tray motor, and remove the tray motor assembly from the tray motor hold- er. Fig.27 Fig.28 2.4.12 Separation of the chassis (L) assembly and chassis (R) assembly (See fig.

43、29) (1) Remove the two screws T retaining the chassis (L) and (R) assemblies. (2) Slide the chassis (L) assembly toward the front and detach it, then remove the chassis (L) upward. Fig.29 R R Tray motor assembly Tray motor Tray motor holder S TT Chassis(L) assembly Chassis(R) assembly Front side CH-

44、X1500 1-14 2.5 Precautions reassembling REFERENCE: When reassembling, also refer to the disassembling proce- dures. 2.5.1Mounting the traverse mechanism assembly (See fig.3034) (1) When mounting the pickup assembly, attach the feed slide shaft assembly to the traverse chassis. Apply E-JC-525 grease

45、to the shaft. (2) Mount the middle gear and the feed slide shaft to the traverse chassis and secure them with the screw O through the shaft holder. (3) Before attaching the mechanism board, move the pickup to the outer edge position, then attach the mechanism board using the screw M. At this time, c

46、heck that the rest switch is correctly placed. (4) To mount the rack arm, first move the pickup to the middle position and fixing it with the screw P. CAUTION: When reassembling the mechanism board, reattach the flexible wire to connector CN603 on the mechanism board, and then unsolder the sorting r

47、ound point. Next, reattach the mechanism board with screw M. Fig.30 Fig.31 Fig.32 Fig.33 Fig.34 Pickup assembly Shaft holder Feed slide shaft assembly Middle gear Traverse chassis Feed motor O N Spindle motor Shaft holder Feed motor assembly O M M Flexible wire Mechanism board CN603 Rest switch Flex

48、ible wire Sorting round point Pickup Lack arm Pickup P CH-X1500 1-15 2.5.2Mounting the lifter unit (See fig.3537) (1) Insert the shafts e of the traverse mechanism assembly into the slide grooves f on the lifter unit. (2) Move the hook of the lifter unit to the edge, and move the sliding lever insid

49、e the side bracket unit to the edge as well. (3) With each hole and lever shifted to the edge, mount the lift- er unit and side bracket unit from the side. (Check each at- tached section, and check that the joint g of the lifter unit is correctly inserted into the holes h of the side bracket unit. After reassembled, check that levers move together.) (4) Turn the lifter unit upside down. As shown in Fig. 37, slide the lever 30 mm away from the edge, and then mount the lifter bracket (L) assembly. Fig.35 Fig.36 Fig.37 e Lifter unit Traverse mechanism assembly Side b