Jvc Kd-s575 User manual

SERVICE MANUAL

CD RECEIVER

No.49592

Jan. 2001

KD-S575

Area Suffix

U ---- Other Area

Contents

Safety precaution

Preventing static electricity

Location of main parts

Disassembly method

Adjustment method

Flow of functional operation until TOC read

Maintenance of laser pickup

Replacement of laser pickup

Description of major ICs

1-2

1-3

1-4

1-5

1-10

1-11

1-13

1-14

COMPACT

DIGITAL AUDIO

KD-S575

1-2

!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.

KD-S575

1-3

Front bracket

CD mechanism

control board

Damper bracket

CD mechanism ass’y

FD screw

Feed motor ass’y

FD gear Pickup unit

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.

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

Conductive material

(conductive sheet) or iron plate

(caption)

Anti-static wrist strap

Soldering

Attention when traverse unit is decomposed

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.

*Please refer to "Disassembly method" in the text for pick-up and how to

detach the substrate.

KD-S575

1-4

Main unit

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

KD-S575

1-5

Disassembly method

Removing the front panel unit

(See Fig.1)

1. Insert a screwdriver to the two 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

Release switch

KD-S575

1-6

Removing the main board

(See Fig.5 and 6)

Remove the front chassis.

Remove the bottom cover.

Remove the two screws B attaching the main board

assembly on the bottom of the body.

Remove the three screws C attaching the main

board assembly on the back of the body.

Disconnect connector CN501 on the main 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 board assembly.

Remove the three screws D attaching the CD

mechanism assembly from the top cover.

Removing the LCD & key control 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 LCD & key control board from the front

panel unit.

Fig.5

Fig. 6

CD mechanism assembly

Top cover

Fig. 7

Fig. 8

Fig. 9

LCD & key control board

CN501

Main board

KD-S575

1-7

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

KD-S575

1-8

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.1

Front bracket

CD mechanism

control board

Damper bracket

CD mechanism

assembly

Fix plate (L)

Rear damper bracket

Fix arm (L)

Damper

Fix plate(R)

KD-S575

1-9

Prior to performing the following procedure, remove

the CD mechanism control board, the front bracket

(loading motor) and the CD mechanism assembly.

Remove the two screws Fand the feed motor

assembly.

Removing the feed motor assembly

(See Fig.10)

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.

Detach the FD gear part of the pickup unit upward.

Then remove the pickup unit while pulling out the

part iof the FD screw.

Remove the screw Gattaching 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.10 and 11)

When reattaching the pickuap unit,

reattach the part jof the pickup unit,

then the part iof the FD screw.

ATTENTION:

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.

Turn up the CD mechanism assembly and remove

the two springs kon both sides of the clamper arms.

Open the clamper arm upward.

Turn the turn table, and remove the two screws H

and the spindle motor.

Removing the spindle motor

(See Fig.12 and 13)

Fig.10

Fig.11

Fig.12

Fig.13

Spindle motor

Pickup unit

Part i

FD screw

Feed motor assembly

FD gear Pickup unit

Part j

Nut push spring plate

Pickup mount nut

Pickup unit

FD screw

KD-S575

1-10

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 4 (2 Speakers connection)

Lineout impedance 20K

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 531kHz ~ 1602 kHz

EXTGS004-26P

The cardboard is cut in a suitable size.

uses for the insulation stand of mechanism.

KD-S575

1-11

Power ON

Set Function to CD

Play

Jump to the first track

TOC readout

Tracking 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

Focus 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

KD-S575

1-12

Feed Section

Focus Section

Tracking Section

Spindle Section

Is the voltage output at

IC521 pin "53" 5V or 0V?

Check the feed motor.

Is 4V present at both

sides of the feed motor?

Is the wiring for IC521

(90) ~ (100) correct?

Check IC581.

Is 6V or 2V present at

IC581 "5" and "6"?

Is 5V present at IC581

pin "11"?

Check the feed motor

connection wiring.

Check the vicinity of

IC521.

Check CD 9V

and 5V.

YES

NONO

YES

When the lens is

moving: Check the circuits in

the vicinity of IC581

pins "15" ~ "18".

Check the pickup and

its connections.

YES

Does the S-search

waveform appear at

IC581 pins "17" and "18"?

Is the disk rotated?

Does the RF signal

appear at TP1?

Is 4V present at IC581

pins "7" and "8" ?

Check the spindle motor

and its wiring.

Is 4V present at IC521

pin "55" ?

Check the vicinity of

IC581.

Check IC501 and

IC521.

YES

NO NO

YES

Check the circuits in the

vicinity of IC501 "19" ~

"24" or the pickup

Is the RF waveform at TP1

distorted?

Proceed to the Tracking

section

When the disc is rotated

at first:

Check the circuit in the

vicinity of IC501 pins

"2" ~ "12".

Check IC521.

Check the pickup and

its connections.

YESYES

YES

Is the tracking error signal

output at IC501 "12"?

Approx. 1.2 V

KD-S575

1-13

Maintenance of laser pickup

(1) Cleaning the pick up lens

Before you replace the pick up, please try to

clean the lens with a alcohol soaked cotton

swab.

(2) Life of the laser diode

When the life of the laser diode has expired,

the following symptoms will appear.

(1) The level of RF output (EFM output:ampli

tude of eye pattern) will be low.

Replacement of laser pickup

Is RF output

1.0 0.35Vp-p? Replace it.

YES

O.K

(3) Semi-fixed resistor on the APC PC board

The semi-fixed resistor on the APC printed

circuit board which is attached to the pickup

is used to adjust the laser power.Since this

adjustment should be performed to match the

characteristics of the whole optical block,

do not touch the semi-fixed resistor.

If the laser power is lower than the specified

value,the laser diode is almost worn out, and

the laser pickup should be replaced.

If the semi-fixed resistor is adjusted while

the pickup is functioning normally,the laser

pickup may be damaged due to excessive current.

Turn off the power switch and,disconnect the

power cord from the ac outlet.

Replace the pickup with a normal one.(Refer

to "Pickup Removal" on the previous page)

Plug the power cord in,and turn the power on.

At this time,check that the laser emits for

about 3seconds and the objective lens moves

up and down.

Note: Do not observe the laser beam directly.

Play a disc.

Check the eye-pattern at TP1.

Finish.

KD-S575

1-14

HA13158A (IC321) : Power amp

1. Pin layout

2. Block diagram

IN1

IN2

IN3

IN4

STBY

TA B

PROTECTOR (ASO

SURGE, TSD)

INPUTBUFFER1

INPUTBUFFER2

INPUTBUFFER3

INPUTBUFFER4

AMP1

AMP2

AMP3

AMP4

MUTE

PVCC1PVCC2

INVCC

12 22

14 18 6

1 ~ 23

Description of major ICs

KD-S575

1-15

1. Terminal Layout

20 ~ 1

41 ~ 60

2. Block Diagram

INPUT SERVO

TIMING GENERATOR

A/D

CONVERTER

CLV

SERVO

MICRO

COMPUTER

INTERFACE

VCO

ITUNING

GENERATION

PITCH

CONTROL

ÊSTAT

CK384(EFM)

VCOF

BYTCK

SMCK

FCLK

CSEL

MSEL

PCK

EFM

PLLF

DSLF

IREF

DRF

ARF

RSEL

PSEL

MLD

MCLK

MDATA

DSL.

PLL

VCO

AVDD2

SUB

CODE

BUFFER

SSEL

SQCK

SUBQ

AVDD2

CLVS

CRC

BLKCK

CLDCK

SBCK

SUBC

DEMPH

RESY

FLAG6(RESY)

EFM

DEMODULATION

SUBCODE

DEMODULATION

SYNC

INTERPOLATION

16k

SRAM

CIRC

ERROR

CORRECTION

DEINTERLEVE

LRCKIN(MSEL)

BCLK(SSEL)

SRDATAIN

(PSEL)

IOSEL

DIGITAL

DEEMPHSIS

8TIMES

OVER SAMPUNC

DIGITAL FILTER 1BIT

DAC

LOGIC

PEM

(R)

PEM

(L)

DIGITAL

AUDIO

INTERFACE

DIGITAL

AUDIO

INTERFACE

INTER POLATION

SOFT MUTING DIGITAL

ATTENUATION

PEAK DETECTIVE

AUTO CUE

D/A

CONVERTER

OUTPUT PORT

AVSS1

AVDD1

OUTR

OUTL

FLAG

IPFLAG

ECM

LRCK

SRDATA

BCLK

DMUTE

TRKV

KICK

VREF

TRVSTR

ECS

TVD

TRD

FOD

TBAL

FBAL

TOFS

TES

/TLOCK

/FLOCK

PLAY

LDON

WVEL

SENSE

MN35510(IC561):Digital servo & digital signal processor

KD-S575

1-16

3. Description

No. symbol I/O

BCLK

LRCK

SRDATA

DVDD1

DVSS1

MCLK

MDATA

MLD

SENSE

FLOCK

TLOCK

BLKCK

SQCK

SUBQ

DMUTE

STATUS

RST

SMCK

PMCK

TRV

TVD

ECM

ECS

KICK

TRD

FOD

VREF

FBAL

TBAL

RF ENV

VDET

OFT

TRCRS

RFDET

BDO

LDON

Description

Not used

Connected to GND

Digital audio interface output

Power supply (Digital)

Micom command clock signal input

Micom command load signal input

Micom command data input

Focus lock signal output Active :Low

Sence signal output

(Data is latched at signal's rising point)

Tracking lock signal output Active :Low

sub-code - block - clock signal output

Outside clock for sub-code Q resister input

Sub-code Q -code output

Connected to GND

Status signal

(CRC,CUE,CLVS,TTSTOP,ECLV,SQOK)

Reset signal input (L:Reset)

Not used

Traverse enforced output

Traverse drive output

Not used

Spindle motor drive signal (Enforced

mode output) 3-State

Spindle motor drive signal (Servo error

signal output)

Kick pulse output

Tracking drive output

Focus drive output

Reference voltage input pin for D/A

output block (TVD,FOD,FBA,TBAL)

Focus Balance adjust signal output

Tracking Balance adjust signal output

Focus error signal input(Analog input)

Tracking error signal input(Analog input)

RF envelope signal input(Analog input)

Vibration detect signal input(H:detect)

Off track signal input(H:off track)

Track cross signal input

RF detect signal input(L:detect)

BDO input pin(L:detect)

Laser ON signal output(H:on)

I/O

III II

Description

Not used

TES

PLAY

WVEL

ARF

IREF

DRF

DSLF

PLLF

Tracking error shunt signal output(H:shunt)

RF signal input

Reference current input pin

Bias pin for DSL

Not used

Loop filter pin for DSL

Loop filter pin for PLL

Power supply(Analog)

Connected to GND(Analog)

Not used

IIII

Connected to GND(for X'tal oscillation

circuit)

III

Not used

Pull up

Connected to GND

pull up

Power supply(Digital)

Lch audio output

Connected to GND

Rch audio output

Power supply(for X'tal oscillation circuit)

Input of 16.9344MHz X'tal oscillation circuit

Output of X'tal oscillation circuit

VCOF

AVDD2

AVSS2

EFM

PCK

PDO

SUBC

SBCK

VSS

VDD

BYTCK

CLDCK

FLAG

IPPLAG

FLAG

CLVS

CRC

DEMPH

RESY

IOSEL

TEST

AVDD1

OUT L

AVSS1

OUT R

RSEL

SSEL

MSEL

PSEL

CSEL

MN35510

KD-S575

1-17

AN8806SB-W (IC501) : RF&Servo AMP

LDON

LDP

VCC

RF-

RF OUT

RF IN

C.AGC

ARF

C.ENV

C.EA

CS BDO

BDO

CS BRT

OFTR

/NRFDET

GND

PDAC

PDBD

PDF

PDE

PDER

PDFR

TBAL

FBAL

EF-

EF OUT

TE-

TE OUT

CROSS

TE BPF

VDET

LD OFF

VREF

ENV

30 24 25 26 23 22 14 3

629

728

27 8910 17 11 12 19

ENV CURCUIT

DET

AGC

BDO

OFTR

-- +

+--

-- +

VCBA

1.Pin layout

2.Block diagram

KD-S575

1-18

3. Pin function

PD AC

FBAL

TBAL

PDFR

PDER

PDF

PDE

PD BD

TE BPF

VDET

CROSS

TE OUT

TE-

FE OUT

FE-

/NRFDET

GND

LD OFF

VREF

ENV

OFTR

C.AGC

ARF

C.ENV

C.EA

CS BDO

BDO

CS BRT

LD ON

LDP

VCC

RF-

RF OUT

RF IN

Pin No. Symbol I/O

I/O

I I-V amp input

I-V amp input

E I-V amp gain control

F I-V amp gain control

Tracking balance control

Focus balance control

Inverse input pin for focus error amp

Output pin of focus error

Inverse input pin for tracking error amp

Tracking error signal output

Tracking error cross output

Input pin of tracking error through BPF

Vibration detection signal output

Connect to ground

Reference voltage output

Function

APC amp input terminal

APC amp output terminal

APC ON/OFF control terminal

Envelope output

Ground

RF detection signal output

Of-track status signal output

BDO output pin

A capacitor is connected to this terminal to detect the envelope of RF signal

RF output

Connecting pin of AGC loop filter

RF input

RFamp output

Inverse input pin for RF amp

Power supply

Connect to ground

A capacitor is connected to this terminal to detect the envelope of RF signal

A capacitor is connected to detect the lower envelope of RF signal

KD-S575

1-19

VCC2

V05-

V05+

V04+

V04-

V03+

V03-

VC2+

V02-

V01+

V01-

VCC1

VIN1

VIN1G

REV

FWD

S-GND

VCONT

VIN4

VIN4G

VCC-S

VREF-IN

REG-OUT

REG-IN

VIN3G

VIN3

VIN2G

VIN2

CH 3,4,5

Power supply

Output control

CH5

CH4

CH2

CH1

CH3

22K 11K

5VREG(PNPT r

The outside puuting)

22K

11K

CH1,2

Power supply

LA6567H-X(IC541) : Servo BTL driver

1.Pin layout & blockdiagram

Level shiftLevel shiftLevel shiftLevel shift

Thermal shutdown

Input

Signal system power supply

KD-S575

1-20

2. Pin function

Pin no. Symbol

CH3,4,5 Power supply( It is short with VCC1,VCC-S)

Loading output(-)

Loading terminal (+)

CH4 Output terminal(+)

CH4 Output terminal(-)

CH3 Output terminal(+)

CH3 Output terminal(-)

CH2 Output terminal(+)

CH2 Output terminal(-)

CH1 Output terminal(+)

CH1 Output terminal(-)

CH1,2(BTL) Power supply(It is short with VCC-S,VCC2)

CH1 Input terminal

CH1 Input terminal(For gain adjustment)

CH2 Input terminal

CH2 Input terminal(For gain adjustment)

CH3 Input terminal

CH3 Input terminal(For gain adjustment)

Regulator terminal(Outside putting PNP base)

Regulator terminal(Outside putting PNP collector)

Standard voltage input terminal

Signal system power supply(It is short with VCC1,VCC2)

CH4 Input terminal(For gain adjustment)

CH4 Input terminal

5CH(VLO) Output voltag set terminal

Signal system GND

5CH(VLO)Signal output switch terminal(FWD),Input of logic of loading part

5CH(VLO)Signal output switch terminal(REV),

Input of logic of loading part

Function

VCC2

V05-

V05+

V04+

V04-

V03+

V03-

V02+

V02-

V01+

V01-

VCC1

VIN1

VIN1G

VIN2

VIN2G

VIN3

VIN3G

REG-IN

REG-OUT

VREF-IN

VCC-S

VIN4G

VIN4

VCONT

S-GND

FWD

REV

LA6567H-X(2/2)

Frame(FR)at the center bocomes system GND power.

Please be short-circuited on the outside and use the terminal of the power supply system

and three teminals of VCC-S, VCC1,VCC2.

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