JVC KD-S550 Bedienungsanleitung

SERVICE MANUAL

CD RECEIVER

No.49524

Dec. 1999

This service manual is made from 100% redycled paper.

Printed in Japan

9912(V)

VICTOR COMPANY OF JAPAN, LIMITED

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

KD-S550 / KD-S600

(No.49524)

KD-S550 / KD-S600

Area Suffix

J ---- Northerm America

E ---- Continental Europe

Contents

Safety precaution  1-2

Instructions 1-3 - 13

Location of main parts 2-1

Disassembly method 2-2

Adjustment method 2-7

Flow of functional operation

until TOC read  2-8

Maintenance of laser pickup 2-10

Description of major ICs 2-11

Block diagram  2-23

Standard schematic diagrams 2-24

Printed circuit board 2-27 - 28

Parts list 3-1 - 11

COMPACT

DIGITAL AUDIO

ATT

FUNC

BAND

PROG

PRESET

DISC

Model

KD-S550

KD-S600

Remote

control unit

!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.

Main uni

Location of main parts

Control unit

CD mechanism

Display LED & key control board

Main board

Tuner

pack

Main board

Connector to controller

Power IC

ISO connector Antenna jack

Loading motor

Mechanism relay board

Damper

Optical pick up unit

Damper

Feed motor

Spindle motor

Disassembly method

Removing the front panel unit

(See Fig.1)

1. Insert a screwdriver to the joints a on the side of the

front chassis and two joints b on the right side, then

detach the front chassis toward the front side.

1. Press the release switch and remove the front

panel unit in the direction of the arrow.

Removing the front chassis (See Fig.2)

Removing the heat sink (See Fig.3)

1. Remove the three screws A attaching the heat sink

on the left side of the body, and remove the heat

sink.

Removing the bottom cover (See Fig.4)

Turn the body upside down.

Insert a screwdriver to the two joints c and two

joints d on both sides of the body and the joint e on

the back of the body, then detach the bottom cover

from the body.

Heat sink

Fig.2

Fig.1

Fig. 3

Fig. 4

Regulator board

Front chassis

Removing the main amplifier board

(See Fig.5 and 6)

Remove the front chassis.

Remove the bottom cover.

Remove the two screws B attaching the main

amplifier board assembly on the bottom of the body.

Remove the three screws C attaching the main

amplifier board assembly on the back of the body.

Disconnect connector CN501 on the main amplifier

board assembly from the CD mechanism assembly.

Removing the CD mechanism assembly

(See Fig.7)

Remove the front chassis.

Remove the bottom cover.

Remove the main amplifier board assembly.

Remove the three screws D attaching the CD

mechanism assembly from the top cover.

Removing the control switch board

(See Fig.8 and 9)

Remove the front chassis.

Remove the four screws E attaching the rear cover

on the back of the front panel unit.

Remove the control switch board from the front

panel unit.

Fig.5

Fig. 6

CD mechanism assembly

Fop cover

Fig. 7

Fig. 8

Fig. 9

Control switch board

CN501

Main amplifier board

* Prior to disassembling the CD mechanism, remove

the following parts.

* The front panel unit and the front chassis (Refer to

Fig.1 and 2)

* The heat sink (Refer to Fig.3)

* The bottom cover (Refer to Fig.4)

* The main amplifier board (Refer to Fig.5 and 6)

* The CD mechanism ass’y (Refer to Fig.7)

Unsolder the part f and g on 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 F 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 i and the front bracket slot j.

Disconnect the flexible wire from connector on the

pickup unit.

Removing the CD mechanism control

board(See Fig.10 and 11)

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.11).

ATTENTION:

Fig.10

Fig.11

Fig.12

Fig.13

Front bracket

CD mechanism

control board

Shift the lock

Flexible wire

Pickup unit

FD gear

CD mechanism control board

Loading motor Front bracket

Front bracket Pull outward

Pull outward

Flame

Damper bracket

CD mechanism ass’y

* Prior to performing the following procedure, remove

the CD mechanism control board.

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.

Removing the loading motor

(See Fig.12 to 14)

* Prior to performing the following procedure, remove

the CD mechanism control PWB 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.17 and 18.

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.

Removing the CD mechanism ass’y

(See Fig.10, 15 to 18)

The CD mechanism ass’y can be

removed if only the rear damper

bracket on the left side is removed.

ATTENTION:

Fig.14

Fig.15

Fig.16

Fig.17

Fig.18

Rear damper bracket

Fix arm (R)

Damper

Loading motor

Belt

Damper bracket

CD mechanism ass’y

Flame m

Fix plate (L)

Rear damper bracket

Fix arm (L)

Damper

Fix plate(R)

* 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 feed motor ass’y

(See Fig.19)

* 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.

Remove the screw L attaching the nut push spring

plate and the pickup mount nut from the pickup unit.

Pull out the FD screw.

Removing the pickup unit

(See Fig.19 and 20)

When reattaching the pickuap unit,

reattach the part o of the pickup unit,

then the part n of the FD screw.

ATTENTION:

* 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.

Removing the spindle motor

(See Fig.21 and 22)

Fig.19

Fig.20

Fig.21

Fig.22

Spindle motor

Pickup unit

Part n

FD screw

Feed motor ass’y

FD gear Pickup unit

Part O

Nut push spring plate

Pickup mount nut

Pickup unit

FD screw

Adjustment method

Test instruments required for adjustment

1. Digital oscilloscope (100MHz)

2. AM Standard signal generator

3. FM Standard signal generator

4. Stereo modulator

5. Electric voltmeter

6. Digital tester

7. Tracking offset meter

8. Test Disc JVC :CTS-1000

9. Extension cable for check

EXTGS004-26P 1

Standard measuring conditions

Power supply voltage DC14.4V(10.5~16V)

Load impedance 20Kohm(2 Speakers connection)

Output Level  Line out 2.0V (Vol. MAX)

How to connect the extension cable for adjusting

Dummy load

Exclusive dummy load should be used for AM,and FM. For

FM dummy load,there is a loss of 6dB between SSG output

and antenna input.The loss of 6dB need not be considered

since direct reading of figures are applied in this working

standard.

Standard volume position

Balance and Bass &Treble volume : lndication"0"

Loudness : OFF

BBE : OFF

Frequency Band

FM 87.5MHz ~ 108.0MHz

MW 522kHz ~ 1620 kHz

LW 144kHz ~ 279kHz

EXTGS004-26P

Power ON

 Set Function to CD

Play

Jump to the first track

TOC readout

T racking loop closed

Disc rotates

Disc inserted

YES

Laser emitted

Pickup feed to the inner area

Focus search

RF signal eye-pattern

opens

RF signal eye-pattern

remains closed

"No disc"

display

• When correctly focused

 F ocus Servo Loop ON

• When the laser diode correctly

emits

Microprocessor

commands

Rough Servo Mode

CLV Servo Mode

(ProgramArea)

CLV Servo Mode

(Lead-In Area;

Digital: 0)

• RF signal

Flow of functional operation until TOC read

• When the pickup correctly moves

to the inner area of the disc

TERMINAL

Microprocessor

commands

FMO

TC9462 "53"

FEED MOTOR

+TERMINAL

IC581 "5"

REST SW

• When the disc correctly rotates

Tracking Servo Loop ON

Servo CLV

Rough

Servo

AccelerationAcceleration

Microprocessor

commands

Spindle

motor (-)

IC581 "7"

0.5 Sec 0.5 Sec

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