JVC KD-LX100J User Manual

KD-LX300/KD-LX100
SERVICE MANUAL
CD RECEIVER
KD-LX300/KD-LX100
Area Suffix
Difference piont
KD-LX300 KD-LX100
Contents
Safety preccaution Preventing static electricity Disassembly method Adjustment method Extension cord connectiong method Functions of the mechanism under the service mode Flow of functional operation until TOC read Maintenance of laser pickup Replacement of laser pickup Description of major ICs
9
SEL
78
LINE IN
O X
11 12
10
SUBWOOFER OUT
OFF
O X
1-2 1-3 1-4 1-13 1-14
1-16
1-18 1-19 1-19 1-21~37
COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.
No.49635
Apr. 2001
KD-LX300/KD-LX100

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 adjustment or operation check.
1-2
KD-LX300/KD-LX100

Preventing static electricity

1.Grounding to prevent damage by 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.
2.About the earth processing for the destruction prevention by static electricity
Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players. Be careful to use proper grounding in the area where repairs are being performed.
2-1 Ground the workbench
Ground the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing the traverse unit (optical pickup) on it.
2-2 Ground yourself
Use an anti-static wrist strap to release any static electricity built up in your body.
(caption) Anti-static wrist strap
Conductive material (conductive sheet) or iron plate
3. Handling the optical pickup
1. In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement optical pickup are shorted. After replacement, return the shorted parts to their original condition. (Refer to the text.)
2. Do not use a tester to check the condition of the laser diode in the optical pickup. The tester's internal power source can easily destroy the laser diode.
4.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 replacement 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. It is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it
CD mechanism ass’y
Damper bracket
Attention when traverse unit is decomposed
*Please refer to "Disassembly method" in the text for pick-up and how to detach the substrate.
1.Solder is put up before the card wire is removed from connector on the CD substrate as shown in Figure. (When the wire is removed without putting up solder, the CD pick-up assembly might destroy.)
2.Please remove solder after connecting the card wire with when you install picking up in the substrate.
Front bracket
Feed motor ass’y
FD screw
CD mechanism control board
Soldering
FD gear
Pickup unit
1-3
KD-LX300/KD-LX100

Disassembly method

<Main body>
Removing the top chassis
(See Fig.1 to 5)
1.
Remove the two screws A attaching the bottom cover to the top chassis on the bottom of the body.
2.
Remove the two screws B attaching the top chassis on both sides of the body.
3.
Remove the two screws C and the two screw D attaching the heat sink on the left side of the body.
4.
Remove the two screws E and the screw F on the back of the body.
5.
Remove the two screws G on the upper side of the body.
6.
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
A
A
Fig.1
Top chassis
B
Fig.2
E
Fig.4-1 (KD-LX300)
E
Fig.4-2 (KD-LX100)
F
F
C
Heat sink
G
Top chassis
B
D
Fig.3
Top chassis
G
1-4
Fig.5
Removing the front panel assembly
(See Fig.6 to 8)
Prior to performing the following procedure, remove the top chassis assembly.
1.
Disconnect the flexible harness from connector CN701 on the main board assembly.
2.
Remove the four screws H attaching the front panel assembly on both sides of the body. Remove the front panel toward the front.
KD-LX300/KD-LX100
CN701
Front panel assembly
Fig.6-1 (KD-LX300)
Front panel assembly
Fig.7
H
CN701
Front panel assembly
Fig.6-2 (KD-LX100)
Front panel assembly
H
CN701
Fig.8
Removing the Front Board (See Fig.9)
Prior to performing the following procedure, remove the top chassis assembly and the front panel assembly.
1.
Remove the four screws I attaching the front board on the back of the front panel assembly and release the eight joints a.
Joints a
I
Joints a
Fig.9
I
1-5
KD-LX300/KD-LX100
Removing the lifter unit (See Fig.10)
Prior to performing the following procedure, remove the top chassis assembly and the front panel assembly.
1.
Disconnect the harness from connector CN503and CN504 on the main board.
2.
Remove the four screws J and detach the lifter unit from the bottom cover.
Removing the feed motor (L) (See Fig.11)
Prior to performing the following procedure, remove the lifter unit.
1.
Remove the washer attaching the clutch assembly and detach the clutch assembly from the shaft of the lifter unit.
2.
Remove the two screws K attaching the feed motor (L).
CN503
J
CN504
J
Lifter unit assembly
Fig.10-1 (KD-LX300)
Removing the feed motor (R) (See Fig.12)
Prior to performing the following procedure, remove the lifter unit.
1.
Remove the washer attaching the clutch assembly and detach the clutch assembly from the shaft of the lifter unit.
2.
Remove the two screws L attaching the feed motor (R).
Clutch assembly
Lifter unit assembly
CN503
J
Clutch assembly
CN504
J
Lifter unit assembly
Fig.10-2 (KD-LX100)
Lifter unit assembly
1-6
Washer
Feed motor (R) assembly
L
Washer
Feed motor (L) assembly
K
Fig.11Fig.12
Removing the operation assembly
(See Fig.13 to 17)
Prior to performing the following procedure, remove the top chassis assembly, the front panel assembly and the lifer unit.
1.
Disconnect the card wire from connector CN702 on the main board and remove the operation assembly.
2.
Remove the three screws M attaching the right and left brackets which fix gears on both sides of the operation assembly.
3.
Remove the springs 5 and 6 from the operation assembly.
ATTENTION:
When reassembling, correctly engage the switch S651 and S652 on the main board and the right gear with the part b of the operation assembly.
Bracket (L)
M
Spring 5
Operation assembly
Fig.13
CN702
KD-LX300/KD-LX100
Bracket (R)
M
Spring 6
Bracket (R)
Operation assembly b
S652
S651
Operation assembly b
Fig.14
Operation assembly
b
S652
S651
Fig.15Fig.16
1-7
KD-LX300/KD-LX100
Removing the operation switch board
(See Fig.17 and 18)
Prior to performing the following procedure, remove the operation assembly.
1.
Remove the six screws N attaching the button panel on the operation assembly.
2.
Pull out the operation switch board from inside of the button panel.
Operation switch board
Button panel
N
N
Fig.17
Button panel
Removing the CD mechanism assembly
(See Fig.19)
Prior to performing the following procedure, remove the top chassis.
1.
Remove the three screws O and the CD mechanism assembly from the top chassis.
O
Fig.18
O
O
CD mechanism assembly
Fig.19
1-8
Removing the main board assembly
(See Fig.20 to 22)
Prior to performing the following procedure, remove the top chassis.
KD-LX300/KD-LX100
1.
Disconnect the flexible harness from connector CN701, the card wire from CN702 on the main board and the harness from CN503 and CN504 respectively.
2.
Remove the three screws P attaching the main board assembly to the bottom cover on the upper side of the body.
3.
Move the main board in the direction of the arrow and release the three joints c. (At this point, the main board can be removed with the rear panel and the rear heat sink.)
4.
Remove the three screws Q attaching the rear heat sink on the back of the body.
5.
Remove the two screws R and the screw S attaching the rear panel. Now, the main board assembly will be removed.
ATTENTION:
When reassembling, correctly engage the switch S651 and S652 on the main board and the right gear with the part b of the operation assembly (Refer to Fig.21).
CN503
P
Joint c
CN503
P
CN702
Fig.20-1 (KD-LX300)
Front panel assembly
CN504
CN701
P
Joint c
CN504
CN701
P
Rear panel
Rear panel
R
R
S
Fig.22-1 (KD-LX300)
S
Fig.22-2 (KD-LX100)
Q
Q
R
Rear heat sink
R
Rear heat sink
Q
Q
Joint c
Main board
CN702
Fig.20-2 (KD-LX100)
Front panel assembly
S652
Fig.21
Joint c
b
S651
1-9
KD-LX300/KD-LX100
<CD mechanism section>
Removing the CD mechanism control board (See Fig.1 and 2)
Remove the screw A and the pickup cover attached
1. to the front bracket with the double-sided tapes.
Unsolder the three parts a, b and c on the CD
2. mechanism 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 B 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 d and the front bracket slot e.
Disconnect the flexible wire from connector on the
6. pickup unit.
Pickup cover
B
Double-sided tape
Damper bracket
A
E
b
Front bracket
Pickup unit
c
Fig.1
E
e
Flexible wire
a
E
d
CD mechanism control board
Shift the lock
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).
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.
1.
Remove the two springs f attaching the CD mechanism assembly and the front bracket.
2.
Remove the two screws C and the front bracket while pulling the flame outward.
3.
Remove the belt and the screw D from the loading motor.
Spring f
C
FD gear
Loading motor
Fig.2
CD mechanism control board
Spring f
C
Front bracket
Fig.3
1-10
Pull outward
Flame
Front bracket
Fig.4
Pull outward
Loading motor
Fig.5
KD-LX300/KD-LX100
D
Belt
Removing the CD mechanism assembly
(See Fig.1, 6 to 9)
Prior to performing the following procedure, remove the CD mechanism control board and the front bracket (loading motor).
1.
Remove the three screws E and the damper bracket.
2.
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.
3.
Remove the CD mechanism assembly and the two springs h attaching the flame.
4.
Remove the two screws F and both sides rear damper brackets from the dampers. Detach the CD mechanism assembly from the left side to the right side.
ATTENTION:
The CD mechanism assembly can be removed if only the rear damper bracket on the left side is removed.
CD mechanism assembly
E
Flame
Spring h
E
Fix plate (L)
Damper bracket
E
Fig.6
E
Fig.7
Rear damper bracket
F
Spring h
Fix arm (L)
Shaft g
Fix arm (R)
Damper
Shaft g
Fig.8
Rear damper bracket
F
Shaft g
Fig.9
Damper
Fix plate(R)
Shaft g
1-11
KD-LX300/KD-LX100
Removing the feed motor assmbly
(See Fig.10)
Prior to performing the following procedure, remove the CD mechanism control board, the front bracket (loading motor) and the CD mechanism assembly.
1.
Remove the two screws G and the feed motor assembly.
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 assembly and the feed motor assembly.
1.
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 assembly
G
FD gear
Nut push spring plate
FD screw
Pickup unit
Fig.10
Part j
Part i
Pickup unit
H
Pickup mount nut
Pickup unit
ATTENTION:
2.
Remove the screw H 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 i 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 assembly and the feed motor assembly.
1.
Turn up the CD mechanism assembly and remove the two springs k on both sides of the clamper arms. Open the clamper arm upward.
Spring k
FD screw
Spindle motor
Fig.11
Spring k
Fig.12
I
2.
Turn the turn table and remove the two screws I and the spindle motor.
1-12
I
Fig.13
Loading...
+ 26 hidden pages