Philips 22RC026/00 User manual

Table of contents

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Car

CD

changer

22RC026/00

Service

Service

Service

Contents

Specifications

Service

Interface

cable

connections

Functional

explanation

Notes

regarding

CD

player

repairs

Notes

regarding

handling

of

the

pick-up

Pick-up

detail

Disassembly

IC

circuit

descriptions

and

IC

block

diagrams

Block

diagram

PCB

layout

/

connections

Circuit

diagram

1/3

Circuit

diagram

2/3

Circuit

diagram

3/3

Trouble

shooting

12VCP

19

20

and

23

21

22

24

25

Exploded

view

CD

changer

mechanism

/

Lubrication

overview

28

Mechanical

parts

Exploded

view

cabinet

parts

Cabinet

parts

and

accessories

Electrical

parts

=

29

30

31

31

COMPACT

LASER

PRODUCT

DIGITAL

AUDIO

Published

by

Philips

Car

Systems

9672

Printed

in

The

Netherlands

©Copyright

reserved

Subject

to

modification

(GB)

4822

725

25470

56

PHILIPS

PHILIPS

SPECIFICATIONS

Power

supply

>

13.2VDC

(nom.)

Distortion

>:

<£0.01%

(at

1kHz)

©

16.0VDC

(max.)

Data

-

Track

mute

:

2

93dB

(A-weighted)

Frequency

response

:

20-20,000

Hz

(+

1dB)

Wow

and

flutter

:

unmeasurable

DAC

resolution

:

1

bit

per

channel

Output

voltage

>

700mV

Bus

interface

:

D?B

Operating

positions

:

Horizontal/Vertical/45°

Crosstalk

L<>R

:

<-75dB

Weight

:

2kg

S/N

ratio

‘

96dB

(A-weighted)

Dimensions

(HxWxD)

:

66x

259x175

mm

SERVICE

IMPORTANT

!!

!!

IMPORTANT

-

When

disassembling,

ALWAYS

protect

the

pick-up

unit

against

ESD

damage

by

closing

the

solder

connection

of

the

pick-up

unit

either

on

the

CD

panel

or

the

flexible

foil

pcb!

(See

also

the

repair

notes

and

disassembly

procedures

described

in

this

manual.)

-

New

pick-up

units

are

supplied

with

CLOSED

solder

connections

on

the

flexible

foil

pcb.

Do

NOT

forget

to

remove

the

solder

connection

AFTER

replacing

the

unit!

SERVICE

HINTS

|

-

To

prevent

magazine

check

(duration

approx.

30-40

sec.),

insert

the

magazine

and

press

the

‘eject’

button

SIMULTANEOUSLY.

In

that

case

disc

no.1

is

loaded

and

the

set

comes

into

'Standby'

mode.

-

Use

(home-made)

extension

cables

of

approx.

30

cm

to

get

access

to

the

bottom

side

of

the

main

pcb

for

measuring

purposes.

Two

extension

cables

(a

2-pole

and

a

5-pole

one)

are

required.

To

make

these

cables,

the

following

parts

can

be

ordered

and

used

for

making

the

extension

cables:

CS801

-

cable

assy

2-pole

-

4822

321

62668

-

CS802

-

cable

assy

5-pole

-

4822

320

11738

-

The

set

can

also

operate

without

cover,

but

take

care

of

the

following

measures:

-

ABSOLUTELY

NEVER

PERMIT

LASER

BEAMS

TO

ENTER

THE

EYES

-

DONOT

EXPOSE

THE

SET

TO

BRIGHT

(SUN)LIGHT

-

When

the

CD

changer

has

a

defect

while

the

magazine

is

still

in,

the

magazine

can

be

removed

by

moving

the

emergency

eject

lever

to

the

right

by

a

small

screwdriver,

as

shown

in

figure

1

below.

First

the

protection

sheet

has

to

be

removed.

DO

NOT

FORGET

to

put

the

sheet

back,

to

prevent

dust

intrusion!

When

a

disc

is

chucked,

turn

the

gear

to

the

right

until

the

slide

lever

reaches

to

the

edge

of

the

left

side

(see

figure

2).

Slide

lever

Cs

Gear

i

i

i

i

j

|

|

Figure

1

INTERFACE

CABLE

CONNECTIONS

Figure

2

22RC026

-2-

PCOS

62

459

INTERFACE

CABLE

CONNECTIONS

(continued)

The

figure

below

shows

the

pin

layout

of

the

connections

of

the

interface

cable

(service

12nc:

4822

321

62263)

and

the

extension

cable

(service

12nc:

4822

321

62671).

All

connections

here

are

seen

from

the

front

side

of

the

connectors.

Rectangle_C

connector

t

INTERFACE

CABLE

RECTANGLE_C

CONNECTOR

BUS_GND

Comer

+

12V

PERM.

7

[wen

Ce

SIGN_GND

(SHIELD)

|

(GND)

13-pole

DIN

female

female

13-pole

DIN

male

4

EXTENSION

CABLE

13-POLE

DIN

CONNECTOR

SIGN_GND

=

ew

Ce

7

[raven

on

ois

+

12V

PERM.

BUS_GND

_

Go

(straight

or

hooked

version)

.

we

8

‘od

6

6

ae.

O

8-pole

DIN:

8-pole

DIN

male

female

t

CD

CHANGER

CONNECTOR

8-POLE

DIN

CONNECTOR

22RC026

FUNCTIONAL

EXPLANATION

:

FUNTIONAL

EXPLANATION

1.

APC

(Auto

laser

power

control)

5.

Tracking

servo

This

is

the

circuit

to

control

laser

power

of

pickup,

and

laser

ON/OFF

is

set

by

command

from

micro

computer.

.

RF

Amplifier

(|

pattern

output)

This

inputs

pickup

photo

diode

output

current

(A+C)

to

FIN2

(ipin),

and

(B+D)

to

FIN1

(2pin).

Input

current

is

IV-converted,

and

output

to

RFSM

(41pin)

of

RFSM

amplifier

output

by.

way

of

AGC

circuit.

Self-contained

AGC

circuit

has

variable

range

of

+3dB,

and

the

time

constant

can

be

varied

by

outside-fixed

condenser

of

PH1

(60pin).

This

also

controls

bottom

level

of

EFM

signal

(RFSM

output),

and

this

response

can

be

varied

by

outside-fixed

condenser

of

BH1

(61pin).

Central

gain

of

AGC

variable

range

is

set

by

resistance

value

between

RFSM

(41pin)

and

RFS-(42pin).

.

SLC

(Slice

level

control)

SLC

makes

duty

of

EFM

signa!

which

is

input

to

DSP

50%.

This

judges

duty,

and

decides

DC

level

by

inte-

grating

EFMO

signal

which

is

output

from

DSP.

.

Focus

servo

Focus

error

signal

can

be

gained

by

detecting

the

dif-

ference

between

(A+C)

and

(B+D),

which

is

(B+D)-

(A+C),

and

it

is

sent

to

FE

(20pin).

Focus

error

signal

gain

is

set

by

resistance

value

between

FE

(20pin)

and

FE-(21pin).

FA

amplifier

is.

phase

compensating

Amplifier,

and

the

equalizer

curve

is

set

by

outside-fixed

condenser

and

resistance.

Besides,

this

amplifier

has

muting

function.

FD

amplifier

has

the

following

functions;

phase

com-

pensating

circuit,

focus

search

signal

synthesis,

and

offset

cancelling.

Focus

search

starts

by

F-SERCH

command,

and

generates

lamp

waveshape

by

inner

clock.

Focus

error

signal

by

this

waveshape

detects

in-

focus

condition

(focus

zero

cross),

and

turns

on

focus

servo.

Lamp

waveshape

amplitude

is

set

by

resistance

between

FD

(16pin)

and

FD-(17pin).

This

inputs

pickup

photo

diode

output

current

to

E

(Spin)

and

F

(4pin).

input

current

is

|V-converted,

and

output

to

TE

(7pin)

by

way

of

VCA

circuit

for

balance

adjustment

and

VCA

circuit

for

follow-up

to

RFAGC

cir-

cuit.

Tracking

error

gain

is

set

by

resistance

between

TE-(6pin)

and

TE

(7pin).

;

TOFF

amplifier

just

after

TE

(7pin)

turns

off

servo

b

TOFF

signal

from

DSP.

|

TH

amplifier

varies

servo

response

characteristic

by

TGL

signal

from

DSP.

or

by

THLD

signal

of

inside

for-

mation

by

detecting

JP

signal.

When

DEFECT

is

de-

tected,

inside

mode

changes

into

THLD.

This

can

be

avoided

by

causing

short

circuit

in

DEF

(49pin)

to

“L”’=GND.

In

case

of

detection,

gain

can

be

automati-

cally

up

by

configulating

outside

DC!

(9pin)

band

pass

filter

which

picks

up

only

shock

element

out

of

tracking

error

signals

and

putting

it

in.

TO

amplifier

has

the

function

of

synthesizing

JP

pulse

and

cancelling

tracking

offset:

JP

pulse

is

set

by

JP

(14pin)

(THLD

is

detected

inside

).

|

.

Sled

servo

SLEQ

(28pin)

sets

response

characteristic.

Amplifier

after

SLEQ

(28pin)

has

muting

function,

and

mutes

SLOF

(38pin)

by

“H”

or

SLED

OFF

command.

Sled

feed

is

operated

by

means

of

current

input

to

SL-

(30pin)

and

SL+(31pin),

that

is,

by

connecting

to

output

port

of

micro

computer

by

resistance

and

setting

feed-

ing

gain

by

the

resistance

value.

.

Spindle

servo

This

configurates,

together

with

DSP,

servo

circuit

to

keep

disc

linear

velocity

at

a

scheduled

level.

This

re-

ceives

signal

from

DSP

by

CV-(39pin)

and

CV+(40pin),

and

sets

equalizer

characteristic

by

SP

(23pin),

SP-

(36pin)

and

SPD

(27pin)

which

output

to

SPD

(27pin).

SPG

(25pin)

is

set

by

resistance

with

which

amplifier

gain

of

12cm

mode

is

connected

to

standard

voitage.

FUNCTIONAL

EXPLANATION

8.

TES,

HFL

(Traverse

signal)

10.

PCS

82

441

In

transferring

pickup

from

inner

track

to

outer

track,

EF

output

from

pickup

should

be

so

connected

that

HFL

and

TES

Nave

phase

relation

as

shown

in

the

figure

below.

TES

comparator

has

about

+100mvV

hysteresis

at

-polarity

comparator

against

TESI

input.

To

pickup

exclusively

necessary

signals

out

of

TE

signals,

band

pass

filter

is

configurated

outside.

.

DRF

(Beam

level

judgement)

DRF

becomes

“H”,

when

EFM

signal

(RFSM

output)

is

held

at

peak

value

by

condenser

of

PH1

(60pin)

and

peak

value

of

RFSM

gets

over

2.1V.

Condenser

of

PH1

(60pin)

is

related

to

setting

both

DRF

constant

when

detected

and

RFAGC

response.

—

ZEEE.

2:1

FE

7

\___________

\

,

bal

Pickup

position

|

Pa

In

focus

In-focus

judgement

This

detects

DEF+0.2V

of

focus

error

signal

S

curve,

and

then

judges

focus

zero

cross

(being

in

focus)

when

S

curve

becomes

REF.

sinepone

laos

‘REPO,

2V

5

i

Ne

a

EM

cad

ene

ra

dit

se

=

re

In

focus

11.

DEFECT

This

normally

maintain

mirror

surface

level

by

con-

denser

of

LF2

(59pin),

and

when

lack

of

EFM

signal

(RFSM

output)

gets

over

0.35V,

outputs

“H”

to

DEF

(49pin).

When

DEF

(49pin)

becomes

“H”,

tracking

N.Y

LF2

(S9PIN)

a

sy

ania

Pw

ewveed

rocco

=

eee

DEF

(49PIN)

7

12.

Reset

circuit

When

Vcc

gets

over

about

2.8V,

Power

on

Reset

is

cancelled.

22RC026

FUNCTIONAL

EXPLANATION

Mechanical

Timing

MAG

IN

H

ELv

+.

L

+

ELV

-

L

|

LOAD

+

L

:

y

a}

’

:

‘

LOAD

-

L

H

:

LOADOUT

s_L

;

a

4

CLAMP

L

}

:

H

’

'

UPLIMIT

L

|

: :

LOWLIMIT

—soL

. 1

H

'

4

DISC

ON

L

t

;

3

!

DISC

COUNT

L

!

H

'

MAG.SW

L

‘

‘

i]

'

'

'

1

0.6s0c

~

~-

15sec

-

\

’

{Disc

LOADING)

DISC

CHANGE(DISC1

—2)

H

ELV

+

L

,

|

ELV

-

u

5

t

:

4

|

‘

|

i]

LOAD

+

L

‘4

+

1

4

|

i]

LOAD

-

u

H

LOADOUT

L

H

CLAMP

kL

H

UPLIMIT

L

H

!

'

t

t

\

LowumitT

Lf

!

’

H

\

'

:

iH

1

4

I

t

'

;

i

'

DISC

ON

L

eH

DISC

COUNT

L

‘

t 4

'

t

|

Hn]

}

'

'

'

;

MAG.

SW

L

-

0.2sec

—

{ELV

DOWN)

=

1.5sec

—_

(Disc

LOADING)

=

1.5sec

a

(Disc

UNLOADING)

awaewoewew

ee

ewewtwewr

ne

ee

——<——<_s_eeeean

=

"ss

ee

eee

ee

mene

me

ew

eee

MAG

EJECT(DISC1

PLAY)

Hi

ELV

+

L.

a

ELV

-

L

H

LOAD

+

L

H

LOAD

-

L

La!

LOADOUT

L

a!

CLAMP

L

a]

UPLIMIT

L

4

LOWLIMIT

L

H

DISC

ON

L

a!

DISC

COUNT

L

4

MAG.SW

L

a!

EJECT

L

—+

meee

-

1.5sec

-_

asa

2.580c

=

=r,

3.0sec

rad

(Disc

UNLOADING)

(ELV

DOWN)

(ELV

UP)

PCS

82

442

22RC026

-6-

NOTES

REGARDING

HANDLING

OF

THE

PICKUP

Touching

this

part

can

cause

function

deterioration.

Please

be

careful

never

to

touch

this

part.

Flexible

wire

(connecting

wire)

PCB

Partially

fixed

VR

Holding

and

pulling

flexible

wire

can

cause

breaking

of

wire.

Please

be

sure

to

hoid

the

housing

itself

in

handling

PICKUP

DETAIL

PICKUP

FPC

(18P

PATTERN

SIDE)

DISASSEMBLY

1.

Remove

9

screws

(A)

securing

the

cabinet.

2.

Remove

the

cabinet

with

pushing

the

front

panel

stopper.

3.

Remove

the

front

panel

with

pushing

the

both

bottom

lid

stopper.

4.Remove

2

screws

@)

and

the

connector

(©)

Connect

P.C.B.

can

be

removed.

5.

Remove

the

cushion.

6.

Remove

the

damper.

7.

If

remove

the

spring

()

installed

between

the

mechanism

and

the

chassis,

also

mechanism

can

be

removed.

‘sy

Be

22RC026

REINFORCEMENT,DIN

Se

BOTTOM

LID

DAMPER

CUSHION

DISASSEMBLY

CD

MECHANISM

|

1)

How

to

remove

the

ELEVATOR

MOTOR,

FEED

MO-

TOR

and

the

LORDING

MOTOR.

(1)

How

to

remove

the

FEED

MOTOR.

1.

Short

the

short-pattern

of

FPC,

PU

with

sol-

der.

2.

Remove

the

two

screws

(SCR

S-TPG

PAN

PCS

2

x3)

which

fasten

the

MECHA-PANEL

(134).

The

MECHA-PANEL

can

be

removed.

3.

Remove

the

four

screw

(SCR

S-TPG

PAN

PCS

2x

4)

©1})

which

fasten

the

MAIN

PCB

|

4.

Remove

the

connectors

(CP801

and

CP802).

5.

Only

when

you

will

also

remove

the

ELEVATOR

MOTOR,

remove

FPC602.

6.

Remove

the

five

screws

(SCR

TPG

PAN

PCS

2x

4)

(10)

which

fasten

the

TOP

CHASSIS

C71).

The

TOP

CHASSIS

can

be

removed.

7.

Remove

the

two

screw

(SCR

S-TPG

PAN

PCS

2X

2.5)

(C55)

which

fasten

the

FEED

MOTOR

€54).

(2)

How

to

remove

the

ELEVATOR

MOTOR.

1,

Remove

the

SPECIAL

WASHER

(C5)

which

fasten

the

GEAR

A

(2)

and

the

GEAR

B

(3).

The

GEAR

A

and

the

GEAR

B

can

be

removed.

2.

Remove

the

two

screws

(SCR

S-TPG

PAN

PCS

2

x

2.5)

(C8)

which

fasten

the

ELEVATOR

MOTOR

(7).

The

ELEVATOR

MOTOR

can

be

removed.

MECHA-PANEL

ELEVATOR

MOTOR

DISASSEMBLY

(3)

How

to

remove

the

LOADING

MOTOR.

SLIDE

PLATE

1.

Remove

the

SPECIAL

WASHER

which

fasten

the

GEAR

LA

and

GEAR

LB(C5})

.

The

GEAR

LA

and

GEAR

LB

can

be

removed.

2.

Moving

the

slide

plate

C

€15)to

the

right,

lower

the

elevator

to

the

third

slot

position.

3.

Remove

the

two

screws

(SCR

S-TPG

PAN

PCS

2

2.5)

which

fasten

the

LOADING

MOTOR

=

LOADING

The

LOADING

MOTOR

can

be

removed.

|

MOTOR

2)

How

to

remove

the

PICKUP

and

the

SPINDLE

MOTOR.

(1)

How

to

remove

the

CD

PCB

and

PICKUP.

1.

Short

the

short-pattern

of

FPC,

PUC99

with

solder.

2.

Remove

CS903,

FPC602,

CP904,

CP905

and

CP906

from

the

connector.

3.

Remove

the

two

screws

(SCR

S-TPG

PAN

PCS

2

x

4)

(72)

and

one

screws

(SCR

S-TPG

BIN

27)

(C73)

which

fasten

the

CD

PCB

(cB.

4.

Remove

the

screw

(SCR

S-TPG

BIN

2X7)

which

fix

INSIDE

SWITCH

@78).

5.

Remove

the

two

screws

(SCR

PAN

PCS

1.7

3.5)

|

and

THRUST,

SCREW

(96),

PLATE,

SLIDE

Es?

will

come

off.

6.

Remove

the

two

screws

SPECIAL

SCREW

which

fix

SHAFT,

PICKUP,

A839).

FPC

PU

Short

circuit

soldering.

7.

Remove

the

SHAFT,

PICKUP,

A

from

the

PICKUP,

LASER

€87).

PICKUP.

LASER

The

PICKUP,

LASER

can

be

removed.

short

circuit

position.

8.

Cause

short

circuit

by

soldering

in

PICKUP,

LASER

|

Cause

shor

circuit

on

the

PICKUP,

LASER

(87)

_

Remove

FPC,

PU

CD

off

CONNECT,

and

CD

Hevea

raha

ea

oy

P.C.B

come

off.

FPC

PU

(C99)

off

PICKUP,

LASER

<e)