JVC KW-XC828 User manual
SERVICE MANUAL
CD/CASSETTE RECEIVER
No.49729
Apr. 2002
COPYRIGHT 2002 VICTOR COMPANY OF JAPAN, LTD.
KW-XC828
KW-XC828
Area Suffix
U Ather Areas
Contents
Safety precaution
Disassembly method
Adjustment method
Flow of functional
operation unit TOC read
1-2
1-3
1-30
1-31
Maintenance of laser pickup
Replacement of laser pickup
Description of major ICs
1-33
1-33
1-36
E
X
DIRECTORY
SOUND
VOL VOL
SOURCE
RF
U
D
ATT
1-2
KW-XC828
!
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.
Safety precaution
!
CAUTION
Please use enough caution not to see the beam directly or touch it in case of an
adjustment or operation check.
1-3
KW-XC828
Remove the four screws Aon both sides of the
body.
Release four joints aon both sides of the body using
a screwdriver and remove the front panel assembly
toward the front. The connector which connects the
front panel assembly with the rear section comes off.
1.
2.
Disassembly method
Removing the front panel assembly
(See Fig.1 ~ 3)
When reassembling, make sure that
connector CN501 on the front panel
assembly is securely connected to
CN701 on the main board (See Fig.3).
CAUTION:
A
A
A
A
CN701
CN501
Joint a
Joint a
Front panel assembly
Fig.1
Fig.2
Joint a
Joint a
Front panel assembly
Fig.3
Front panel assembly
1-4
KW-XC828
Prior to performing the following procedure, remove
the front panel assembly.
Remove the twelve screws B retaining the system
control board.
Remove the five screws Cretaining the switch
board.
Unsolder WR501 and WR502 of the wires
connecting the system control board with the switch
board.
1.
2.
3.
Removing the system control board /
switch board (See Fig.4 , 5) B
B
B
Switch board
Switch board
System control board
CC
B
WR502
WR502
WR501
WR501
WR502
Fig.4
Fig.5
System control board
B
1-5
KW-XC828
Prior to performing the following procedure, remove
the front panel assembly.
Remove the ten screws D, the screw Eand F
attaching the rear panel on the back of the body.
Remove the three screws Gand the two screws H
attaching the heat sink on the left side.
Remove the three screws Iattaching the CD player
section and the cassette player section on the both
sides of the body.
Disconnect the card wire from connector CN702 on
the main board in the CD player section on the back
of the body.
Remove the CD player section upward.
1.
2.
3.
4.
5.
Removing the CD player section /
cassette player section (See Fig.6 ~ 10)
When reassembling, joint the CD player
section and the cassette player section
at four joints b.
CAUTION:
D
D
E
D
G
GI
I
I
CN702
CD player section
Cassette player section
Joint b
F
H
Heat sink
Rear panel Fig.6
Fig.7
Fig.8
Fig.10Fig.9
Joint b
CD player section
Joint b Cassette player section
1-6
KW-XC828
Remove the three screws Jattaching the main
board. The connector CN601 on the main board is
disconnected from the CD mechanism control board.
1.
<CD player section>
Removing the main board (See Fig.11)
Prior to performing the following procedure, remove
the main board and MP3 board.
Remove the three screws Lattaching the CD
mechanism assembly.
1.
Removing the CD mechanism assembly
(See Fig.13)
Prior to performing the following procedure, remove
the front panel assembly, the CD player section and
the cassette player section.
When reassembling, securely connect
connector CN601 on the main board to
the connector on the CD mechanism
control board.
CAUTION:
Prior to performing the following procedure, remove
the main board.
Disconnect the wire from connector CN601on the
MP3 board.
Remove the five screws Kand the MP3 board,
releasing the joint cand d.
1.
2.
Removing the MP3 board (See Fig.12)
CN601
J
J
J
CD mechanism assembly
L
K
K
LL
Fig.11
Fig.12
Fig.13
Main board
CN601
Joint c
MP3 board
Joint d
1-7
KW-XC828
Prior to performing the following procedure, remove
the main board.
Disconnect the card wire from connector CN972 on
the main board.
Remove the four screws Nfrom the bottom cover of
the cassette player section.
1.
2.
<Cassette player section>
Removing the cassette mechanism
assembly (See Fig.14 , 15)
Disconnect the card wire from connector CN972 on
the main board.
Remove the two screws Mattaching the main
board.
1.
2.
Removing the main board (See Fig.14)
Prior to performing the following procedure,
remove the cassette mechanism assembly.
Remove the screw Oand move the connector
board in the direction of the arrow to release the
two joints e.
Disconnect the wire from connector CJ402 and
the card wire from CN403 on the connector
board respectively.
1.
2.
Removing the connector board
(See Fig.16)
Prior to performing the following procedures, remove
the front panel assembly, the CD player section and
the cassette player section. MM
CN972
Cassette mechanism assembly
Bottom cover
NN
Fig.14
Fig.15
Fig.16
Main board
Joint e
Connector board
CN403
CJ402
O
1-8
KW-XC828
Remove the two screws Aon each side of the body.
Lift the front side of the top cover and move the
cover backward to release the two joints a.
1.
2.
Removing the top cover (See Fig.1 and 2)
Remove the screw Bfixing the connector board.
Solder the short-circuit point on the connector board.
Disconnect the flexible wire from the pickup.
Move the connector board in the direction of the
arrow to release the two joints b.
Unsolder the wire on the connector board if
necessary.
1.
2.
3.
4.
Removing the connector board
(See Fig.3 to 5)
Before disconnecting the flexible wire
from the pickup, solder the short-circuit
point on the pickup. No observance of
this instruction may cause damage of
the pickup.
CAUTION:
Unsolder the short-circuit point after
reassembling.
CAUTION:
Fig.1
Fig.2
Fig.3
Fig.4Fig.5
A
A
A
B
B
Joints a
Joints a
Top cover
Top cover
Connector board
DET switch
Pickup
Pickup
Short-circuit
Joints b
Short-circuit point
(Soldering)
Flexible wire
Flexible wire
Connector board
Frame
< CD mechanism section >
1-9
KW-XC828
Extend the two tabs cof the feed sw. holder and pull
out the switch.
Unsolder the DET switch wire if necessary.
1.
2.
Removing the DET switch
(See Fig.3 and 6)
Prior to performing the following procedure, remove
the top cover and the connector board.
Remove the two suspension springs (L) and (R)
attaching the chassis unit to the frame.
1.
Removing the chassis unit
(See Fig.7 and 8)
The shape of the suspension spring (L)
and (R) are different. Handle them with
care.
CAUTION:
When reassembling, make sure that the
three shafts on the underside of the
chassis unit are inserted to the dampers
certainly.
CAUTION:
Fig.3
Fig.6
Fig.8Fig.7
B
Connector board
DET switch
DET switch
Pickup
Short-circuit
Joints b
Tab c
Feed sw. holder
Tab c
Suspension spring (L)
Suspension spring (L)
Suspension spring (R)
Suspension spring (R)
Chassis unit
Chassis unit
Frame
Frame
Shafts
Shaft
Damper
Damper
Damper
1-10
KW-XC828
Prior to performing the following procedure, remove
the top cover, the connector board and the chassis
unit.
Remove the screw Cand move the loading / feed
motor assembly in the direction of the arrow to
remove it from the chassis rivet assembly.
Disconnect the wire from the loading / feed motor
assembly if necessary.
1.
2.
Removing the loading / feed motor
assembly (See Fig.11 and 12)
Prior to performing the following procedure, remove
the top cover.
Remove the clamper arm spring.
Move the clamper assembly in the direction of the
arrow to release the two joints d.
1.
2.
Removing the clamper assembly
(See Fig.9 and 10)
When reassembling, connect the wire
from the loading / feed motor assembly
to the flame as shown in Fig.11.
CAUTION:
Fig.9
Fig.10
Fig.12Fig.11
Clamper arm
spring
Clamper arm spring
Chassis rivet
assembly
Joint d
Joint d Clamper assembly
Clamper assembly
Joint d
Joint d
Chassis rivet assembly
Loading / feed motor assembly
Loading / feed motor assembly
C
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