JVC KD-LX10 30, KD-LX10 Service Manual

KD-LX10/KD-LX30

SERVICE MANUAL

CD RECEIVER

KD-LX10 KD-LX30

Area Suffix

J ---- Nortern America

VICTOR COMPANY OF JAPAN, LIMITED

MOBILE ELECTRONICS DIVISION,10-1,1Chome,Ohwatari-machi,Maebashi-city,Japan

(No.49537)

Printed in Japan 200002(O)

Contents

Safety precaution 1-2 Instructions 1-3~ Disassembly method 2-1 Adjustment method 2-4 Maintenance of laser pickup 2-14 Replacement of lase pickup 2-14 Extention code connecting method 2-15

This service manual is made from 100% recycled paper.

Functions of the mechanism under the servise mode 2-18 Flow of functional until TOC read 2-20 Description of major ICs 2-23 Block diagrams 2-39 Standard schematic diagrams 2-41 Printed circuit board 2-45,46 Parts list 3-1~7

No.49537

Feb. 2000

Safety precaution

CAUTION

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 check.

KD-LX10/KD-LX30

Disassembly method

Removing the top chassis

(See Fig.1 to 5)

Remove the two screws A attaching the bottom cover to the top chassis on the bottom of the body.

Remove the two screws B attaching the top chassis on both sides of the body.

Remove the two screws C and the two screw D attaching the heat sink on the left side of the body.

Remove the two screws E and the screw F on the back of the body.

Remove the two screws G on the upper side of the body.

Move the top chassis upward and disconnect the CD mechanism connector from the main board connector by pulling it. Remove the top chassis from the body.

Bottom cover

Fig.1

Top chassis

Fig.4-1 (KD-LX30)

Heat sink

Fig.2

Top chassis

Fig.3

Top chassis

Fig.4-2 (KD-LX10)

Fig.5

2-1

KD-LX10/KD-LX30

Removing the main board assembly

(See Fig.6 and 7)

Prior to performing the following procedure, remove the top chassis.

Disconnect the flexible harness from connector CN701, the card wire from CN702 on the main board and the harness from CN503 and CN504 respectively.

CN504

CN503

CN701

Remove the three screws H attaching the main board assembly to the bottom cover on the upper side of the body.

Remove the screw I attaching the rear panel and the bottom cover on the back of the body. Move the main board in the direction of the arrow and release the two joints a. (At this point, the main board can be removed with the rear panel and the rear heat sink.)

Remove the screw J and the two screws K attaching the rear heat sink on the back of the body.

Remove the two screws L and the screw M attaching the rear panel. Now, the main board assembly will be removed.

ATTENTION:

when reassembling, correctly engage the switch S561 and S562 on the main board with the part e of the operation assembly (Refer to Fig.6-3).

Joint a

CN503

CN702

Fig.6-1 (KD-LX30)

Front panel assembly

Joint a

CN504

CN701

Rear panel

Rear heat sink

Fig.7-1 (KD-LX30)

Rear heat sink

Fig.7-2 (KD-LX10)

Joint a

Main board

CN702

Fig.6-2 (KD-LX10)

S652

Fig.6-3

Front panel assembly

S651

2-2

Removing the front panel assembly

(See Fig.6,8 and 9)

Prior to performing the following procedure, remove the top chassis assembly.

Disconnect the flexible harness from connector CN701 on the main board assembly.

Remove the four screws N attaching the front panel assembly on both sides of the body. Remove the front panel toward the front.

CN503

Joint a

CN503

CN702

Fig.6-1 (KD-LX30)

Front panel assembly

KD-LX10/KD-LX30

CN504

CN701

Joint a

CN504

CN701

Front panel assembly

Fig.9

Removing the Front Board (See Fig.10)

Joint a

CN702

Front panel assembly

Fig.6-2 (KD-LX10)

Front panel assembly

CN701

Fig.8

Joints b

Prior to performing the following procedure, remove the top chassis assembly and the front panel assembly.

Remove the four screws O attaching the front board on the back of the front panel assembly and release the eight joints b.

Joints b

Fig.10

2-3

KD-LX10/KD-LX30

Removing the lifter unit (See Fig.11)

Prior to performing the following procedure, remove the top chassis assembly and the front panel assembly.

Disconnect the harness from connector CN503and CN504 on the main board.

Remove the four screws P and detach the lifter unit from the bottom cover.

Removing the feed motor (L) (See Fig.12)

Prior to performing the following procedure, remove the lifter unit.

Remove the washer attaching the clutch assembly and detach the clutch assembly from the shaft of the lifter unit.

Remove the two screws Q attaching the feed motor (L).

CN503

CN504

Lifter unit assembly

Fig.11-1 (KD-LX30)

Removing the feed motor (R) (See Fig.13)

Prior to performing the following procedure, remove the lifter unit.

Remove the washer attaching the clutch assembly and detach the clutch assembly from the shaft of the lifter unit.

Remove the two screws R attaching the feed motor (R).

Clutch assembly

Lifter unit assembly

CN503

Clutch assembly

CN504

Lifter unit assembly

Fig.11-2 (KD-LX10)

Lifter unit assembly

2-4

Washer

Feed motor (R) assembly

Washer

Feed motor (L) assembly

Fig.12Fig.13

Removing the operation assembly

(See Fig.14 to 17)

Prior to performing the following procedure, remove the top chassis assembly, the front panel assembly and the lifer unit.

KD-LX10/KD-LX30

Remove the screws S attaching the right and left brackets which fix gears on both sides of the operation assembly.

Remove the springs 5 and 6 from the operation assembly.

Disconnect the card wire from connector CN702 on the main board and remove the operation assembly.

ATTENTION:

when reassembling, correctly engage the switch S561 and S562 on the main board and the right gear with the part e of the operation assembly.

Bracket (R)

Spring 5

Operation assembly

Fig.14

CN702

Bracket (L)

Spring 6

S652

Bracket (R)

S652

S651

Operation assembly e

Fig.15

Operation assembly

Operation assembly e

S651

Fig.16Fig.17

2-5

KD-LX10/KD-LX30

Removing the operation switch board

(See Fig.18 and 19)

Prior to performing the following procedure, remove the operation assembly.

Remove the six screws T attaching the button panel on the operation assembly.

Pull out the operation switch board from inside of the button panel.

Button panel

Fig.18

Operation switch board

Removing the CD mechanism assembly

(See Fig.20)

Prior to performing the following procedure, remove the top chassis.

Remove the three screws U and the CD mechanism assembly from the top chassis.

Fig.19

CD mechanism assembly

Fig.20

2-6

KD-LX10/KD-LX30

Removing the CD mechanism control board (See Fig.1 and 2)

Remove the screw N and the pickup cover attached

1. to the front bracket with the two double-sided tapes.

Unsolder the part f and g on the CD mechanism

2. control board.

Remove the stator fixing the CD mechanism control

3. board and the damper bracket (To remove the stator smoothly, pick up the center part).

Remove the screw F attaching the CD mechanism

4. control board.

Remove the CD mechanism control board in the

5. direction of the arrow while releasing it from the two damper bracket slots i and the front bracket slot j.

Disconnect the flexible wire from connector on the

6. pickup unit.

ATTENTION:

Turn the FD gear in the direction of the arrow to move the entire pickup unit to the appropriate position where the flexible wire of the CD mechanism unit can be disconnected easily (Refer to Fig.2).

Pickup cover

Double-sided tape

FD gear

Damper bracket

Front bracket

Pickup unit

Fig.1

Fig.2

Flexible wire

CD mechanism control board

Shift the lock

Removing the loading motor

(See Fig.3 to 5)

Prior to performing the following procedure, remove the CD mechanism control board and the pickup cover.

Remove the two springs k attaching the CD mechanism ass’y and the front bracket.

Remove the two screws G and the front bracket while pulling the flame outward.

Remove the belt and the screw H from the loading motor.

Loading motor

Pull outward

CD mechanism control board

Front bracket

Fig.3

Front bracket

Pull outward

Flame

Fig.4

2-7

KD-LX10/KD-LX30

Loading motor

Belt

Fig.5

Removing the CD mechanism ass’y

(See Fig.1, 6 to 9)

Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor).

Remove the three screws I and the damper bracket.

Raise the both sides fix arms and move the fix plates in the direction of the arrow to place the four shafts l as shown in Fig.8 and 9.

Remove the CD mechanism ass’y and the two springs m attaching the flame.

Remove the two screws J and both sides rear damper brackets from the dampers. Detach the CD mechanism ass’y from the left side to the right side.

ATTENTION:

The CD mechanism ass’y can be removed if only the rear damper bracket on the left side is removed.

CD mechanism ass’y

Flame

Fix plate (L)

Damper bracket

Fig.6

Fig.7

Rear damper bracket

Fix arm (L)

2-8

Fix arm (R)

Damper

Fig.8

Rear damper bracket

Fig.9

Damper

Fix plate(R)

KD-LX10/KD-LX30

Removing the feed motor ass’y

(See Fig.10)

Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor) and the CD mechanism ass’y.

Remove the two screws K and the feed motor ass’y.

Removing the pickup unit

(See Fig.10 and 11)

Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor), the CD mechanism ass’y and the feed motor ass’y.

Detach the FD gear part of the pickup unit upward. Then remove the pickup unit while pulling out the part n of the FD screw.

Feed motor ass’y

FD gear

Nut push spring plate

FD screw

Pickup unit

Fig.10

Part n

Part O

Pickup unit

Pickup mount nut

Pickup unit

ATTENTION:

Remove the screw L attaching the nut push spring plate and the pickup mount nut from the pickup unit. Pull out the FD screw.

When reattaching the pickup unit, reattach the part o of the pickup unit, then the part n of the FD screw.

Removing the spindle motor

(See Fig.12 and 13)

Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor), the CD mechanism ass’y and the feed motor ass’y.

Turn up the CD mechanism ass’y and remove the two springs p on both sides of the clamper arms. Open the clamper arm upward.

Turn the turn table and remove the two screws M and the spindle motor.

FD screw

Spindle motor

Fig.11

Fig.12

Fig.13

2-9

KD-LX10/KD-LX30

Removing the CD mechanism control board(See Fig.1 and 2)

Unsolder the part a and b on the CD mechanism control board.

Remove the stator c fixing the CD mechanism control board and the damper bracket (To remove the stator smoothly, pick up the center part).

Remove the screw A attaching the CD mechanism control board.

Remove the CD mechanism control board in the direction of the arrow while releasing it from the two damper bracket slots d and the front bracket slot e.

Disconnect the flexible wire from connector on the pickup unit.

ATTENTION:

Turn the FD gear in the direction of the arrow to move the entire pickup unit to the appropriate position where the flexible wire of the CD mechanism unit can be disconnected easily (Refer to Fig.2).

CD mechanism ass’y

Front bracket

Damper bracket

Fig.1

Pickup unit

CD mechanism control board

Flexible wire

Shift the lock

FD gear

Loading motor

Pull outward

Fig.2

CD mechanism control board

Front bracket

Fig.3

Front bracket

Pull outward

2-10

Flame

Fig.4

KD-LX10/KD-LX30

Removing the loading motor

(See Fig.3 to 5)

Prior to performing the following procedure, remove the CD mechanism control board.

Remove the two springs f attaching the CD mechanism ass’y and the front bracket.

Remove the two screws B and the front bracket while pulling the flame outward.

Remove the belt and the screw C from the loading motor.

Removing the CD mechanism ass’y

(See Fig.1, 6 to 9)

CD mechanism ass’y

Flame

Loading motor

Belt

Fig.5

Damper bracket

Fig.6

Prior to performing the following procedure, remove the CD mechanism control PWB and the front bracket (loading motor).

Remove the three screws D and the damper bracket.

Raise the both sides fix arms and move the fix plates in the direction of the arrow to place the four shafts g as shown in Fig.8 and 9.

Remove the CD mechanism ass’y and the two springs h attaching the flame.

Remove the two screws E and both sides rear damper brackets from the dampers. Detach the CD mechanism ass’y from the left side to the right side.

ATTENTION:

The CD mechanism ass’y can be removed if only the rear damper bracket on the left side is removed.

Fix plate (L)

Fix arm (R)

Fig.7

Rear damper bracket

Fig.8

Rear damper bracket

Fix plate(R)

Fix arm (L)

Damper

Fig.9

2-11

KD-LX10/KD-LX30

Removing the feed motor ass’y

(See Fig.10)

Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor) and the CD mechanism ass’y.

Remove the two screws F and the feed motor ass’y.

Removing the pickup unit

(See Fig.10 and 11)

*Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor), the CD mechanism ass’y and the feed motor ass’y.

Detach the FD gear part of the pickup unit upward. Then remove the pickup unit while pulling out the part j of the FD screw.

Feed motor ass’y

FD gear

Nut push spring plate

FD screw

Pickup unit

Fig.10

Part j

Part k

Pickup unit

Pickup mount nut

Pickup unit

ATTENTION:

Remove the screw G attaching the nut push spring plate and the pickup mount nut from the pickup unit. Pull out the FD screw.

When reattaching the pickup unit, reattach the part k of the pickup unit, then the part j of the FD screw.

Removing the spindle motor

(See Fig.12 and 13)

Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor), the CD mechanism ass’y and the feed motor ass’y.

Turn up the CD mechanism ass’y and remove the two springs m on both sides of the clamper arms. Open the clamper arm upward.

Turn the turn table, and remove the two screws H and the spindle motor.

FD screw

Spindle motor

Fig.11

Fig.12

2-12

Fig.13

KD-LX10/KD-LX30

2-13

KD-LX10/KD-LX30

Caution : Replacing the pickup

To prevent damage to the laser diode static electricity destroys the laser diode. Always take countermeasure to performing repairs around the laser pickup.

1. Do not touch the area around the laser diode or the actuator.

2. Do not check the laser diode with a tester or other device (the laser diode can be broken quite easily).

3. Short-circuit the laser pickup Solder the land in the center of the flexible cable of the laser diode and help prevent damage from static electricity.

Caution : Solder rejection or cuts a pattern with nipper at shortstop point after short circuiting with clip with terminal face of flexible cable in the static electricity countermeasure soldering iron application that is not done. And the rejection back inserts it in connector immediately and do not touch terminal side of connector either.

Recommendation Soldering iron HAKKO ESD countermeasures product

2-14

Soldering

Caution : Do not forget to remove the soldered laser diode short-circuit after finishing repair, and leave the circuit open.

Maintenance of laser pickup

1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens with a alcohol soaked cotton swab.

(2) Life of the laser diode When the life of the laser diode has expired, the following symptoms will appear. (1) The level of RF output (EFM output:ampli tude of eye pattern) will be low.

KD-LX10/KD-LX30

Is RF output

1.0 0.35Vp-p?

YES

O.K

(3) Semi-fixed resistor on the APC PC board The semi-fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power.Since this adjustment should be performed to match the characteristics of the whole optical block, do not touch the semi-fixed resistor. If the laser power is lower than the specified value,the laser 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.

Replace it.

Replacement of laser pickup

Turn off the power switch and,disconnect the power cord from the ac outlet.

Replace the pickup with a normal one.(Refer to

Pickup Removal on the previous page)

Plug the power cord in,and turn the power on. At this time,check that the laser emits for about 3seconds and the objective lens moves up and down. Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

2-15

KD-LX10/KD-LX30

Extension code connecting method

Using the extention cords to connect the front panel with the main board

Remove the main board follwing the disassembly methode. Then reattachi the heat sink to main board.

Using the 2pin extention cord (EXTLX001-2p),

1. connect the harness of the feed motor (L) assembly with the connector CN503 on the main board.

Using the 2pin extention cord (EXTLX001-2p),

2. connect the harness of the feed motor (R) assembly with the connector CN504 on the main board.

Using the jig board (EXTLX002-SWPWB), its

3. installing to the chassis, then using 4pin extention cord (EXTLX002-4P) connect the harness of the lifter detecting board with the connector CN704 on the board.

Connect the connector (EXTLX001-6PC) and

4. extension wire (EXTLX001-6PF), connect the 6pin connector CN702 on the main board.

Connect the connector (EXTLX002-16PC) and

5. extension wire (EXTLX002-16PF), connect the 16pin connector CN701 on the main board.

EXTGS004-26P

EXTLX001-16PF

EXTLX002-SWPWB

EXTLX002-4P

EXTLX002-16PC

EXTLX001-2P

EXTLX001-6PC

EXTLX001-2P

EXTLX001-6PF

2-16

Extension cord list for KD-LX10/KD-LX30

EXTLX002-JIG : Kit including the following 8 extension parts.

KD-LX10/KD-LX30

No.

1 2 3 4 5 6 7

Parts number Quantity Description EXTLX001-2P EXTLX001-6PF EXTLX001-6PC EXTLX002-16PF EXTLX002-16PC EXTLX002-SWPWB EXTLX002-4P

Besides the above kit, we offer the conventional extension cord for CD mechanism which are not essential to operation check or service. The mechanism should be directly connected to the board using the extension wire. EXTGS004-26P

2 1 1 1 1 1 1

2Pin, 30cm extension cord 6Pin, 30cm flat wire 6Pin x 2, interlocking connector 16Pin flat wire 16Pin, interlocking connector 3 switch PWB 4Pin, 30cm extension cord

EXTGS004-26P

EXTLX001-16PF

EXTLX002-SWPWB

EXTLX002-4P

EXTLX002-16PC

EXTLX001-2P

EXTLX001-6PC

EXTLX001-2P

EXTLX001-6PF

2-17

KD-LX10/KD-LX30

Reassembly

1. Perform reassembly be reversing the removing process of "removal of main parts". CAUTION 1: Prior to reattaching the heat sink, make sure to reattache the top chassis.

2-18

+ 46 hidden pages