JVC KW-XC828 Bedienungsanleitung

SERVICE MANUAL

CD/CASSETTE RECEIVER

No.49729

Apr. 2002

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

1-36

DIRECTORY

SOUND

VOL VOL

SOURCE

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.

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:

CN701

CN501

Joint a

Front panel assembly

Fig.1

Fig.2

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.

Removing the system control board /

switch board (See Fig.4 , 5) B

Switch board

System control board

WR502

WR501

WR502

Fig.4

Fig.5

System control board

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.

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:

CN702

CD player section

Cassette player section

Joint b

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.

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.

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.

Removing the MP3 board (See Fig.12)

CN601

CD mechanism assembly

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.

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.

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.

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

Fig.14

Fig.15

Fig.16

Main board

Joint e

Connector board

CN403

CJ402

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.

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.

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

Joints a

Top cover

Connector board

DET switch

Pickup

Short-circuit

Joints b

Short-circuit point

(Soldering)

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.

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.

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

Connector board

DET switch

Pickup

Short-circuit

Joints b

Tab c

Feed sw. holder

Tab c

Suspension spring (L)

Suspension spring (R)

Chassis unit

Frame

Shafts

Shaft

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.

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.

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

Chassis rivet assembly

Loading / feed motor assembly

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