JVC KD-S871R Bedienungsanleitung

SERVICE MANUAL

CD RECEIVER

No.49691

Feb. 2002

KD-S871R

Contents

Safety precaution

Preventing static electricity

Important for laser products

Disassembly method

Adjustment method

1-2

1-3

1-4

1-5

1-12

Flow of functional

operation unit TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

1-13

1-15

1-16

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COMPACT

DIGITAL AUDIO

SCMMODE

RNDRPTMO AM

TP/PTY

SEL CD

DISP 87910 11 12

Area Suffix

EContinental Europe

EX---------Central Europe

1-2

KD-S871R

!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

!Please use enough caution not to see the beam directly or touch it in case of an

adjustment or operation check.

1-3

KD-S871R

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Preventing 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.

1.2. 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

1.1.3. 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.

1.1.2. Ground yourself

1. Use an anti-static wrist strap to release any static electricity built up in your body.

1.1.1. Ground the workbench

1. 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.

1.1. Grounding to prevent damage by static electricity

Static electricity 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.

FD screw

Feed motor ass’y

FD gear

Pickup unit

Shorting Short circuit land

1-4

KD-S871R

Important for laser products

1.CLASS 1 LASER PRODUCT

2.DANGER : Invisible laser radiation when open and inter

lock failed or defeated. Avoid direct exposure to beam.

3.CAUTION : There are no serviceable parts inside the

Laser Unit. Do not disassemble the Laser Unit. Replace

the complete Laser Unit if it malfunctions.

4.CAUTION : The compact disc player uses invisible

laserradiation and is equipped with safety switches

whichprevent emission of radiation when the drawer is

open and the safety interlocks have failed or are de

feated. It is dangerous to defeat the safety switches.

5.CAUTION : If safety switches malfunction, the laser is able

to function.

6.CAUTION : Use of controls, adjustments or performance of

procedures other than those specified herein may result in

hazardous radiation exposure.

VARNING : Osynlig laserstrålning är denna del är öppnad

och spårren är urkopplad. Betrakta ej strålen.

VARO : Avattaessa ja suojalukitus ohitettaessa olet

alttiina näkymättömälle lasersäteilylle.Älä katso

säteeseen.

ADVARSEL : Usynlig laserstråling ved åbning , når

sikkerhedsafbrydere er ude af funktion. Undgå

udsættelse for stråling.

ADVARSEL : Usynlig laserstråling ved åpning,når

sikkerhetsbryteren er avslott. unngå utsettelse

for stråling.

REPRODUCTION AND POSITION OF LABELS

WARNING LABEL

DANGER : Invisibie laser

radiation when open and

interlock or defeated.

AVOID DIRECT EXPOSURE

TO BEAM (e)

VARNING : Osynlig laser-

strålning är denna del

är öppnad och spårren är

urkopplad. Betrakta ej

strålen. (s)

VARO : Avattaessa ja suo-

jalukitus ohitettaessa olet

alttiina näkymättömälle

lasersäteilylle.Älä katso

säteeseen. (d)

ADVARSEL :Usynlig laser-

stråling ved åbning , når

sikkerhedsafbrydere er ude

af funktion. Undgå udsæt

telse for stråling. (f)

CLASS 1

LASER PRODUCT

CAUTION

Please use enough caution not to

see the beam directly or touch it

in case of an adjustment or operation

check.

1-5

KD-S871R

Press the eject button in the lower right part of the

front panel. Remove the front panel assembly from

the body.

Removing the front panel assembly

(See Fig.1)

Prior to performing the following procedure, remove

the front panel assembly.

Release the four joint tabs aon both sides of the

front chassis assembly and remove the front chassis

assembly toward the front.

Removing the front chassis assembly

(See Fig.2 and 3)

Disassembly method

Fig.1

Fig.2

Fig.3

Front panel assembly

Eject button

Tab a

Front chassis assembly

Front chassis

assembly

Heat sink Tab a

Tab a

1-6

KD-S871R

Remove the three screws Aon the left side of the

body.

Removing the heat sink (See Fig.4)

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly

and the heat sink.

Turn over the body and unjoint the five joints bwith

the bottom cover and the body using a screwdriver.

Removing the bottom cover

(See Fig.5 and 6)

Fig.4

Fig.5

Fig.6

Heat sink

Joints b

Joint b

Joints b

Joint b

Bottom cover

Rear panel

1-7

KD-S871R

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly,

the heat sink and the bottom cover.

Remove the screw B, the two screws C and the

three screws Dattaching the rear bracket on the

back of the body. Remove the rear panel.

Remove the two screws Eattaching the main board

on the bottom of the body. Disconnect connector

CN501 on the main board in the direction of the

arrow.

Removing the main board

(See Fig.7 and 8)

Prior to performing the following procedure, remove

the front panel assembly, the front chassis assembly,

the heat sink, the bottom cover and the main board.

Remove the three screws Fattaching the CD

mechanism section on the back of the top chassis.

Removing the CD mechanism section

(See Fig.9)

Fig.7

Fig.8

Fig.9

Rear panel

Main board

CN501

CD mechanism section

Top chassis

1-8

KD-S871R

Prior to performing the following procedure, remove

the front panel assembly.

Remove the four screws Gattaching the rear cover

on the back of the front panel assembly.

Unjoint the eleven joints cwith the front panel and

the rear cover.

Remove the control switch board on the back of the

front panel.

Removing the control switch board

(See Fig.10 to 12)

Fig.10

Fig.11

Fig.12

Rear cover

Front panel

Control switch board

Joints c

Front panel

Rear cover

Joints c

1-9

KD-S871R

Unsolder the part aand bon the CD mechanism

control board.

Remove the stator fixing the CD mechanism control

board and the damper bracket (To remove the stator

smoothly, pick up the center part).

Remove the screw Aattaching 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 dand the front bracket slot e.

Disconnect the flexible wire from connector on the

pickup unit.

Removing the CD mechanism control

board (See Fig.1 and 2)

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)

ATTENTION:

Prior to performing the following procedure, remove

the CD mechanism control board.

Remove the two springs fattaching the CD

mechanism assembly and the front bracket.

Remove the two screws Band the front bracket

while pulling the flame outward.

Remove the belt and the screw Cfrom the loading

motor.

Removing the loading motor

(See Fig.3 to 5)

Fig.2

Fig.3

Fig.4

Shift the lock

Flexible wire

Pickup unit

FD gear

CD mechanism control board

Loading motor Front bracket

Front bracket Pull outward

Pull outward

Flame

Fig.5

Loading motor

Belt

Fig.1

Front bracket CD mechanism

control board

Damper bracket

CD mechanism assembly

1-10

KD-S871R

Prior to performing the following procedure, remove

the CD mechanism control board and the front

bracket (loading motor).

Remove the three screws Dand 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 assembly and the two

springs hattaching the flame.

Remove the two screws Eand both sides rear

damper brackets from the dampers. Detach the CD

mechanism assembly from the left side to the right

side.

Removing the CD mechanism assembly

(See Fig.1, 6 to 9)

The CD mechanism assembly can be

removed if only the rear damper

bracket on the left side is removed.

ATTENTION:

Fig.6

Fig.7

Fig.8

Fig.9

Rear damper bracket

Fix arm (R)

Damper

Damper bracket

CD mechanism

assembly

Flame h

Fig.5

Front bracket CD mechanism

control board

Damper bracket

CD mechanism

assembly

Fix plate (L)

Rear damper bracket Fix arm (L)

Damper

Fix plate(R)

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