Philips AZ-7483, AZ-7481, AZ-7383, AZ-7382, AZ-7381 Service Manual

MABEL PLATFORM 3A/4A

Technical specification ......................................................1-1

Connections and controls..................................................1-2

Feature overview...............................................................1-3

Accessories .......................................................................1-3

Safety warnings.................................................................1-4

Service hints

Repair positions ............................................................2-1

Service tools..................................................................2-1

Training material ...........................................................2-1

ESD protection equipment............................................2-1

Handling chip components............................................2-2

Service test program .................................................3-1...3-2

Blockdiagram.....................................................................3-3

Start-up procedure.............................................................3-4

Pinning of ICs............................................................3-5...3-9

Circuit diagrams

Supply/Servodriver part.................................................4-1

Signal processing part...................................................4-2

Membrane assembly 4822 360 10363..........................4-3

Control part ...................................................................4-4

Audio part......................................................................4-5

Printed circuit board layout stage.3

Copperside view............................................................4-6

Componentside view.....................................................4-7

Printed circuit board layout stage.5

Copperside view............................................................4-8

Componentside view.....................................................4-9

Exploded view...........................................................5-1...5-2

Mechanical partslist...........................................................6-1

Electrical partslist ......................................................6-1...6-4

CS 46 455

AZ7381

© 4822 725 26016

Published by PW 9802 Service Audio Printed in The Netherlands Subject to modification

Portable compact disc player

CLASS 1

LASER PRODUCT

AZ7382
AZ7383
AZ7481
AZ7482
AZ7483

all versions

TABLE OF CONTENTS

©

Copyright 1997 Philips Consumer Electronics B.V. Eindhoven, The Netherlands

All rights reserved. No part of this publication may be reproduced, stored in a retrieval
system or transmitted, in any form or by any means, electronic, mechanical, photocopying,
or otherwise without the prior permission of Philips.

MODE

P

R

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G

R

E

P

E

A

TA

L

L

R

E

P

E

A

TA

L

L

1-1

CS 46 456

TECHNICAL SPECIFICATION

General

Dimensions (WxHxD) : 128x27.1x136.5mm
Weight without batteries : 225g

Power supply modes

DC-in socket : 4.5-5.5V
Primary batteries (2xLR6) : 1.55-3.6V
Rechargable batteries : 1.55-3.6V

Battery lifetime

Battery empty detection

Battery weak level : 2.1V nom. ±150mV
Battery empty level : 1.6V nom. +100/-50mV

Charge circuit

Charge current : 320mA nom. ±20%
Charge time for 80% AY3360 : 3.75hrs nom.
Charge time for 80% AY3361 : 2.0hrs nom.
Max. charge time (µP controlled) : 5.5hrs nom.
Temperature protection : 50°C ±5°C

Current consumption (DC-in=4.5V, excl. illumination)

Current consumption (Batt. supply=2.25V, excl. illumin.)

Shock resistance (ESA off)

+X/-X direction : ≥2.5g
+Y/-Y direction : ≥2.5g
+Z/-Z direction : ≥2.0g

Shock resistance by use of car base (ESA off)
+X/-X direction : ≥6g

+Y/-Y direction : ≥6g
+Z/-Z direction : ≥6g

Headphone out (measured with 16Ω load, ESA & DBB off)
Output power (THD=10%) : 2x12mW (+1/-3dB)

Frequency response (1mW) : 100Hz-20kHz within 6dB
S/N ratio (unwght) : >80dB (83dB typ.)
S/N ratio (A-wght) : >82dB (85dB typ.)
THD+N (1kHz, 1mW) : <1% (0.2% typ.)
Channel crosstalk (1kHz, no load): <-24dB (-44dB typ.)
Channel unbalance (-40dB) : <5dB
Volume attenuation (1kHz) : >60dB

CD-out (not on all versions, load impedance 47kΩ)
Output level (1kHz, 0dB) : 750Vrms ±2dB

Frequency response : 20Hz-20kHz within 2dB
S/N ratio (unwght) : >85dB (90dB typ.)
S/N ratio (A-wght) : >88dB (95dB typ.)
THD+N (1kHz, 0dB) : <0.2% (0.05% typ.)
Channel crosstalk (1kHz) : <-60dB (-70dB typ.)
Channel crosstalk (10kHz) : <-40dB (-50dB typ.)
Channel unbalance (1kHz, 0dB) : <1dB

Optical output (not on all versions)
Connection : 3.5mm optical fiber jack

Specification according to IEC958 (high accuracy mode).

Laser

Output power : <5mW (3mW typ.)
Wavelength : 780nm

Measurement setup

Use Audio Signal disc SBC429 4822 397 30184

L

R

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

S/N and distortion meter

e.g. Sound Technology ST1700B

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DISPLAY................

shows the different playing modes, tracks and times

§ ...........................skips and searches forward

∞ ...........................skips and searches backward

VOLUME................adjusts the volume level at the headphone socket

RESUME/HOLD ....activates the RESUME function and/or HOLD function (locking all buttons)

MODE 00................selects the different playing modes: SHUFFLE™SHUFFLE REPEAT ALL™REPEAT™REPEAT

ALL™SCAN™off

PROG P.................stores tracks in a program and reviews the program

DBB .......................Dynamic Bass Boost: enhances the bass response,

DBB 1™DBB 2™DBB 3™off

Press this button for more than 3 seconds to switch off/on acoustic feedback.

STOP 9..................stops CD play, deletes various settings, switches off the CD player and activates charging.

OPEN.....................opens the lid of the CD player

2;...........................starts and pauses CD play

ESA........................Electronic Shock Absorption is the buffer memory for uninterrupted sound

EARPHONE pp.......Earphone socket (3.5mm)

4.5 V DC................Socket for external power supply

Battery compartment to insert batteries

1-2

CS 46 457

CONNECTIONS AND CONTROLS

4.5 V DC

TYPEPLATE

OPEN

DBB

MODE

DISPLAY

PROGRAM

ESA

PLAY / PAUSE

STOP

NEXT

PREVIOUS

EARPHONE JACK

VOLUME

HOLD / RESUME

1-3

CS 46 458

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1-4

CS 46 459

© WARNING

All ICs and many other semiconductors are susceptible to
electrostatic discharges (ESD). Careless handling during
repair can reduce life drastically.
When repairing, make sure that you are connected with the
same potential as the mass of the set via a wristband with
resistance. Keep components and tools at this potential.

f ATTENTION

Tous les IC et beaucoup d´autres semi-conducteurs sont
sensibles aux décharges statiques (ESD). Leur longévite
pourrait être considérablement écourtée par le fait qu´aucune
précaution nést prise à leur manipulation.
Lors de réparations, s´assurer de bien être relié au même
potentiel que la masse de l´appareil et enfileer le bracelet
serti d´une résistance de sécurité.
Veiller à ce que les composants ainsi que les outils que l´on
utilise soient également à ce potentiel.

d WARNUNG

Alle ICs und viele andere Halbleiter sind empfindlich
gegenüber elektrostatischen Entladungen (ESD).
Unsorgfältige Behandlung im Reparaturfall kann die
Lebensdauer drastisch reduzieren.
Sorgen Sie dafür, daß Sie im Reparaturfall über ein Puls­armband mit Widerstand mit dem Massepotential des
Gerätes verbunden sind.
Halten Sie Bauteile und Hilfsmittel ebenfalls auf diesem
Potential.

ñ WAARSCHUWING

Alle IC´s en vele andere halfgeleiders zijn gevoelig voor
electrostatische ontladingen (ESD).
Onzorgvuldig behandelen tijdens reparatie kan de levensduur
drastisch doen vermindern. Zorg ervoor dat u tijdens reparatie
via een polsband met weerstand verbonden bent met hetzelfde
potentiaal als de massa van het apparaat.
Houd componenten en hulpmiddelen ook op ditzelfde potentiaal.

i AVVERTIMENTO

Tutti IC e parecchi semi-conduttori sono sensibili alle scariche
statiche (ESD).
La loro longevità potrebbe essere fortemente ridatta in caso di
non osservazione della più grande cauzione alla loro
manipolazione. Durante le riparationi occorre quindi essere
collegato allo stesso potenziale che quello della massa
delápparecchio tramite un braccialetto a resistenza.
Assicurarsi che i componenti e anche gli utensili con quali si
lavora siano anche a questo potenziale.

©

Safety regulations require that the set be restored to its
original condition and that parts which are identical with
those specified be used.
Safety components are marked by the symbol

i

Le norme di sicurezza estigono che l´apparecchio venga
rimesso nelle condizioni originali e che siano utilizzati i
pezzi di ricambiago identici a quelli specificati.
Componenty di sicurezza sono marcati con

ñ

Veiligheidsbepalingen vereisen, dat het apparaat in zijn
oorspronkeliijke toestand wordt teruggebracht en dat
onderdelen, identiek aan de gespecificeerde, worden toegepast.
De Veiligheidsonderdelen zijn aangeduid met het symbool

s Varning !

Osynlig laserstrålning när apparaten är öppnad och
spärren är urkopplad. Betrakta ej strålen.

∂ Advarsel !

Usynlig laserstråling ved åbning når sikkerhedsafbrydere
er ude af funktion. Undgå udsaettelse for stråling.

ß Varoitus !

Avatussa laitteessa ja suojalukituksen ohitettaessa olet alttiina
näkymättömälle laserisäteilylle. Älä katso säteeseen !

f

"Pour votre sécurite, ces documents doivent être utilisés par
des spécialistes agréés, seuls habilités à réparer votre
appareil en panne".

ESD

SAFETY

d

Bei jeder Reparatur sind die geltenden Sicherheitsvor­schriften zu beachten. Der Originalzustand des Gerätes
darf nicht verändert werden. Für Reparaturen sind Original­ersatzteile zu verwenden.
Sicherheitsbauteile sind durch das Symbol markiert.

f

Les normes de sécurité exigent que l`appareil soit remis
à l`état d`origine et que soient utilisées les pièces de
rechange identiques à celles spécifiées.
Les composants de sécurité sont marqués

CLASS 1

LASER PRODUCT

©

DANGER: Invisible laser radiation when open.

©

After servicing and before returning the set to customer
perform a leakage current measurement test from all
exposed metal parts to earth ground, to assure no
shock hazard exists.
The leakage current must not exceed 0.5mA.

AVOID DIRECT EXPOSURE TO BEAM.

©

AVAILABLE ESD PROTECTION EQUIPMENT :

anti-static table mat large 1200x650x1.25mm 4822 466 10953

small 600x650x1.25mm 4822 466 10958

anti-static wristband 4822 395 10223
connection box (3 press stud connections, 1MΩ) 4822 320 11307
extendible cable (2m, 2MΩ, to connect wristband to connection box) 4822 320 11305
connecting cable (3m, 2MΩ, to connect table mat to connection box) 4822 320 11306
earth cable (1MΩ, to connect any product to mat or to connection box) 4822 320 11308
KIT ESD3 (combining all 6 prior products - small table mat) 4822 310 10671
wristband tester 4822 344 13999

SAFETY WARNINGS

2-1

CS 46 460

SERVICE HINTS

REPAIR POSITION COPPERSIDE

To get access to the copperside of the
printed circuit board proceed as follows:

1. Remove the bottom screws (6x)

2. Lift the bottom-cabinet

3. Supply the unit via external DC-socket

4. Take care of door switch during measurement or enter
service test program, radial test

To get access to the componentside of the
printed circuit board proceed as follows:

1. Remove the bottom screws (6x)

2. Open the CD-door

3. Lift the top-cabinet and put it backwards on the table

4. Remove the bottom and supply the unit via the external
DC-socket as shown in the picture above

5. Close the door-switch (i.e. adhesive tape) or enter
service test program, radial test

SERVICE TOOLS

Audio signal disc SBC429 4822 397 30184
Playability test disc SBC444 4822 397 30245
Test disc 5 (disc without errors) + Test disc 5A (disc with dropout errors,

black spots and fingerprints) SBC426/SBC426A 4822 397 30096

TRAINING MATERIAL

Portable CD 1994 – Principles of Electronic Shock Absorption System ESA,

Key components 1994, Remote control system 4822 725 24941

Portable CD 1996 – Key components 1996, Battery charging, DC/DC-converter 4822 725 24986
Portable CD 1998 – Key components 1998, Power Save Mode PSM 4822 725 26017

(available from April 1998 onwards)

ESD PROTECTION EQUIPMENT

Anti-static table mat large 1200x650x1.25mm 4822 466 10953

small 600x650x1.25mm 4822 466 10958

Anti-static wristband 4822 395 10223
Connection box (3 press stud connections, 1MΩ) 4822 320 11307
Extendible cable (2m, 2MΩ, to connect wristband to connection box) 4822 320 11305
Connecting cable (3m, 2MΩ, to connect table mat to connection box) 4822 320 11306
Earth cable (1MΩ, to connect any product to mat or to connection box) 4822 320 11308
KIT ESD3 (combining all 6 prior products - small table mat) 4822 310 10671
Wristband tester 4822 344 13999

REPAIR POSITION COMPONENTSIDE

The unit is now in a proper working position and can be turned in all directions necessary to get access for measurements.

2-2

CS 46 461

HANDLING CHIP COMPONENTS

SERVICE TEST PROGRAM

1. PRELIMINARY SETUP

• To enter the service test program hold the keys “MODE” and

“STOP” depressed while turning POWER ON (i.e. connecting
the AC/DC adaptor or inserting batteries).

• The display shows the software version of the built-in
microprocessor (i.e. “S-19”). Versions are counted from “00”

onwards; that means the higher the number the newer the
software.

• The program is now in the main menu – various tests can be
entered by pressing the corresponding buttons (see flow chart
on next page or detailed description of test programs below).

• To exit the service test program disconnect the set from the
power source.

2. DISPLAY TEST

Purpose: Check functionality of display and display driver.

• To enter the display test start service test program and press
the “NEXT” button.

• The display shows test pattern1. All segments are activated for
finding open circuits (see flow chart on next page).

• To jump to the next pattern press the “NEXT” button.

• The display shows test pattern2. All alternate pins (2, 4, ...) are

activated for finding short circuits (see flow chart on next page).

• To jump back to test pattern1 press the “NEXT” button, to exit
the display test and return to the main menu press the “STOP”
button.

3. KEY TEST

Purpose: Check operation of keys.

• To enter the key test start service test program and press the
“MODE” button.

• The display shows “--”.

• Hold key depressed and check corresponding key code on the

display. Key codes can be found in table1 (see flow chart on
next page).

• To exit the key test and return to the main menu press the
“STOP” button.

4. PLAYBACK TEST WITH ERROR ANALYSIS

Purpose: Analyse errors that occur during playback and search

for intermittent failures.

• To enter the playback test start service test program and press
the “DBB” button. Note that the playback test can only be
entered if the CD-door is closed.

• The set now reads the TOC and switches to stand-by.

• Press the “PLAY” button to start the error analysis.

As long as the playback is free of errors the display shows track
and time information like in normal play-mode.
In case of an error a corresponding error code will be displayed.
The meaning of this error code can be found in table2 (see flow
chart on next page).

Note: Errors can either be

“fatal”

or

“non fatal”

. Fatal errors
always stop the playback, non fatal errors only cause a
short interruption of the music. Fatal errors are displayed
as long as the set is connected to the power source, non
fatal errors are displayed until a new error occurs or a
button is pressed.

• To stop the playback test disconnect the set from the power
source.

5. SERVO TEST

Purpose: Check door switch and inner switch, movement of

slide and acceleration of discmotor.

• To enter the servo test start service test program and press the
“PLAY” button.

• The display shows “Sxy”.
“x” indicates state of door switch;
“y” indicates state of inner switch.

x,y

= “0” means switch is closed; “1” means switch is open.

• To move slide outside hold the “NEXT” button depressed.

• To move slide inside hold the “PREV” button depressed.

• To accelerate the discmotor clockwise hold the “MODE” button

depressed.

• To accelerate the discmotor counter-clockwise hold the
“PROG” button depressed.

• To enter the focus test press the “PLAY” button, to exit the
servo test and return to the main menu press the “STOP”
button.

6. FOCUS TEST

Purpose: Check movement of lens and operation of focus servo.

• The focus servo loop is switched on and the set starts
searching the focus (“focus ramping”). As soon as the focus
has been found the focus servo loop is closed and the state of
the focus is monitored continuously.
If the focus is OK the display shows “ F”, else “-F”.

• When the disc is turned manually “focus noise” is audible.

• To move slide outside hold the “NEXT” button depressed.

• To move slide inside hold the “PREV” button depressed.

• To accelerate the discmotor clockwise hold the “MODE” button

depressed.

• To accelerate the discmotor counter-clockwise hold the
“PROG” button depressed.

• In case the focus is OK the discmotor test can be entered by
pressing the “PLAY” button, to exit the focus test and return to
the main menu press the “STOP” button.

7. DISCMOTOR TEST

Purpose: Check speed regulation of discmotor.

• The speed regulation is switched on and the discmotor starts
rotating. If the speed reaches 75% of the nom. speed the
display shows “ d”, else “-d”.

• In parallel also the state of the focus is monitored continuously
(display “ F” or “-F”).

• In case the disc speed is OK and the focus is OK the radial test
can be entered by pressing the “PLAY” button, to exit the
discmotor test and return to the main menu press the “STOP”
button.

8. RADIAL TEST

Purpose: Check if radial loop locks and an audio signal is

audible at the headphone output.

• The radial servo loop is switched on, mute is released and the
audio signal is audible. If the system is on track the display
shows “ r”, else “-r”.

• In parallel also the disc speed (display “ d” or “-d”) and the
state of the focus (display “ F” or “-F”) are monitored
continuously.
Note: In case of radial errors the audio output is muted and
muting is not released automatically when the systems
recovers from the error. “-r” remains on the display.
To open mute again press the “NEXT” or “PREV” button.

• To jump 10 tracks outside press the “NEXT” button.

• To jump 10 tracks inside press the “PREV” button.

• To exit the radial test and return to the main menu press the

“STOP” button, to exit the service test program disconnect the
set from the power source.

Important remark:

In radial test mode data to the DRAM is written at 1.2 times the
nominal speed, and read from the DRAM at nominal speed.
Because writing is done faster than reading the DRAM gets full
after a certain time.
In normal play mode the system would now wait until the DRAM
is partly emptied again, jump backwards and resume filling at the
last written position. However, in radial test mode the jumps
would disturb measurements on the radial servo loop.
Therefore this function has been disabled and filling restarts
immediately from the current position of the pick-up unit. As a
result “jumps” are audible during playback.

3-1

CS 46 462

3-23-2

CS 46 463

table1 – key test

DISPLAY OF SET

3

5

6

2

7

8

1

KEYS OF SET

PLAY
NEXT
PREVIOUS
ESA/ESP
MODE
PROGRAM
DBB

Press “STOP” on the CD-player to exit the key test.

PRELIMINARY

SETUP

EXIT

SERVICE TEST

PROGRAM

Display shows

software-version

(e.g. “S-

19”)

DISPLA Y TEST 1

display shows

test pattern1

DISPLA Y TEST 2

display shows

test pattern2

KEY TEST

Display shows

“--”

To enter service test program hold “MODE” & “STOP”-button
depressed, while turning POWER ON.
Door switch is ignored → CD-door can be opened.
“STOP”-button pressed in any step returns to main menu.

Remark: Playback test can only

be entered if CD-door
is closed!

CUE-MODE

Track servo jumps

16 tracks forward

“NEXT”

pressed?

“MODE”

pressed?

any button

depressed?

“STOP”
button?

“DBB”

pressed?

“PLAY”

pressed?

“PLAY”

pressed?

Error during

playback?

“PLAY”

pressed and

focus OK?

“PLAY”

and focus OK

and speed

OK?

“NEXT”

pressed?

REVIEW-MODE

Track servo jumps

16 tracks backw.

Fatal error?

Display shows

error-code

(see table2)

PLAYBACK

TEST

Slide moves

outside

Slide moves

inside until inner

switch is activated

“NEXT”

depressed?

“NEXT”

pressed?

“NEXT”

pressed?

“PREV”

depressed?

“MODE”

depressed?

“PROG”

depressed?

Stop playback

check display

according to table1

MAIN MENU

N

Y

N

Y

N

Y

N

Y

N

Y

N

Y

N

Y Y

N

N

Y

N

Y

N

Y

N

Y

N

Y

N

Y

N

Y

Y

N

Y

N

Y

N

Y

Y

N

CODE

E 1000
E 1001

E 1002

E 1003

E 1004

E 1005

E 1006
E 1008

E 1020

ERROR

focus error
radial error

sledge in error

sledge out error

DRAM filling
error

jump error

subcode error
turntable motor

error

focus search
error

TYPE

non fatal
non fatal

non fatal

non fatal

non fatal

non fatal

non fatal
fatal

fatal

CAUSE

Focus point lost for at least 3ms.
CD7 indicates offtrack while radial

tracking is switched on.
The slide did not reach it´s inner pos.

(inner switch of CDM doesn´t close)
within approx. 6 seconds.

The slide did not come out of it´s inner
pos. (inner switch of CDM is open)
within approx. 250ms.

The DRAM controller was not able to
connect two consecutive audio frames.
The microcontroller had to perform a
direct audio connection that produces
audible clicks.

The offtrack values of CD7 don´t
decrease properly when jumping tracks,
the jump destination could not be found.

No valid subcode for approx. 230ms.
During start-up, the disc speed did not

reach 75% of the nom. speed within
approx. 6 seconds.

The focus point could not be found
within approx.
10 seconds (no valid TOC info), resp.
30 seconds (valid TOC info).

table2 – playback error analysis

Disc motor turns

clockwise

(accelerate)

Disc motor turns

counter-clockwise

(brake)

Slide moves

outside

Slide moves

inside

“NEXT”

pressed?

“PREV”

pressed?

“MODE”

pressed?

“PROG”

pressed?

N

Y

N

Y

N

Y

N

Y

Disc motor turns

clockwise

(accelerate)

Disc motor turns

counter-clockwise

(brake)

ATTENTION: FROM THIS TEST ONWARDS THE

LASER IS SWITCHED ON !!
→ AVOID DIRECT EXPOSURE TO BEAM !!

ATTENTION: JUMPS ARE AUDIBLE DURING PLAYBACK

(read remark on previous page) !!

RESUME

SHUFFLE REPEATALL

SCAN

PROG

2

3

DBB

1

REPEATALL

SCAN

test pattern1

test pattern2

“PREV”

pressed?

RADIAL TEST

• On track status

“ r” = on track
“-r” = not on track

• Disc speed status

“ d” = speed OK
“-d” = speed error

• Focus status

“ F” = focus OK
“-F” = focus error

DISC MOT. TEST

• Disc speed status

“ d” = speed OK
“-d” = speed error

• Focus status

“ F” = focus OK
“-F” = focus error

FOCUS TEST

• Focus status

“ F” = focus OK
“-F” = focus error

Note: If focus has
been lost, focus
start-up procedure
is entered (ramping).

SERV O TEST

Display shows:

“S

xy”

• State of switches

x = door switch
y = inner switch
“0” = closed
“1” = open

FLOW CHART

3-3 3-3

CS 46 464

SOUND/VOLUME

CONTROL

TC9404FN
DIG. FILTER & DAC

SERIAL

INTERFACE

µCON

INTERFACE

TIMING

GEN.

SAA7374GP
CD7

SM5902AF
NPC

TDA1300T
HF-PREAMPLIFIER

L.P.F.

H.P.F.

+

LASER
SUPPLY &
PROTECT.

R2

D1

D2

D3

D4

R1

O5

O1

O3

O4

SCLK
WCLK

MISC

SILD
RAB
SCL
SDA

DATA

ZSCK
ZLRCK
ZSRDATA

BCK

LRCK

DATA

YSCK

YLRCK

YSRDATA

O6

Hf HFIN

RESET

R2

D1

D2

D3

R1

LDonVddl LDON

H=Laser on

MCK

A0...A9, D0...D3
CAS, RAS, WE, OE

MI

+C

DISC

Laser
diode

PHOTO DIODE

ARRAY

TURNTABLE

MOTOR

TRACK
SERVO

FOCUS
SERVO

SLIDE

SERVO

D1 D2

R2R1

D3

VAM2103
CD-DRIVE

Monitor
diode

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.

L.P.F.L.P.F.

DRAM INTERFACE

A/D-CONVERTER

SHOCK

CONTROL

CONTROLLER

INTERFACE

INPUT

INTERFACE

I/O

EXTENSION

OUTPUT

INTERFACE

VR

LO

YFLAG

YMLD

YMCLK

YM DATA

RESET

DCIN

VOUT2

VOUT1

BATM

CHG_ON
(from µP)

POWER

(from µP)

BATIN

DCDTB

SERIAL

INTERFACE

µP

INTERFACE

BS
EMP
SM

LCD

DECODERENCODER

CONTROL PART

ATTENUATORINPUT BUFFER

EBU

INTERFACE

RAM

ADDRESS.

SUBCODE
PROCESS.

MOTOR

CONTROL

OUTPUT
STAGES

ERROR

CORRECT.

FRONT END TIMING

DIGITAL PLL

SRAM

EFM

DEMOD.

Vref

KILL

PRE-PROC.

FUNCTION
CONTROL

VERSATILE
INTERFACE

AUDIO

PROCESS.

PEAK

DET.

DIGITAL FILTER

ATT CIRCUIT

DE-EMPHASIS FILTER

BA3574BFS
HEADPHONE AMP.

P TMP87CK20F

LCD DRIVER

CLOCK GEN.

& TIMING

16bit TIMER

COUNTER

ALU

RESET

(FROM DC/DC CONV.)

ROMRAM

4MHz

DISPLAY ILLUMINATION

1)

DIGITAL OUT

1)

I/O PORTS

RCI, RCO, RCD

Lo

LOLD

VDD

+3

VCC

+A

+A

+µP

SL (PWM signal)

SL FO RA

FO

(PWM signal)

RA (PWM signal)

SLIDE_IN

FOCUS_IN

DM±

Sldm±

Focus±

TRACK_IN

VR+3 VG

MPC17A50VM
SERVO DRIVER

SAWTOOTH

OSCILLATOR

LOW VOL TAGE

DETECTOR

DM_IN

VLG VRVG

PWM_DM
(FROM µP)

CL

saw

VG VLG VR

CL

saw

SAW_CLOCK
(FROM DC/DC CONV.)

Tra ck ±

L.P.F.

L.P.F.

L.P.F.

FLEX PCB

HEADPHONE&

RC-SOCKET

RIGHT

LEFT

DC-in socket

+

ACCU or

BATTERY

EXT. DC
DOWN-

CONV.

3.2V

DC/DC

UP-CONV.

ACCU DET.

PWM_IN

BATM

SUPPLY/CHARGE CIRCUIT

+3

RC

(FROM/TO

RC-CIRCUIT)

DOBM

(FROM CD7)

MOTO1 16.9MHz 4MHz 16.9MHzDOBM (TO DIGITAL OUT)

POWER

REF_ON

U_BATT

U_CHG

PWM_OUT

CHG_ON

PWM_IN

T_ACCU

ACCU_IN

PORES

MUTE

S_MUTE

DBB

ACCU

MEASURING

TEMP.
CONT.

DBB/LEVEL

(TO SOUND CONT.)

TREB

(TO SOUND CONT.)

NPC_RES

(FROM µP)

TREB (FROM NPC)

DBB/LEVEL (FROM NPC)

DBB (FROM µP)

BEEP (FROM µP)

RESET

PORES

(FROM µP)

RESET

T_ACCU

ACCU_IN

PWM_OUT REF_ON

U_CHG

FROM µP

TO µP

+A +DC+3

DCTBD

FROM/TO SUPPLY/CHARGE CIRCUIT

DRAM DRAM

1)

RC

(FROM/TO RC-SOCKET)

RC-CIRCUIT

1)

CL

saw

VG VLG VR

H-BRIDGE

MOTOR DRIVER 4

H-BRIDGE

MOTOR DRIVER 3

H-BRIDGE

MOTOR DRIVER 1

CL

saw

VG VLG VR

CL

saw

VG VLG VR

H-BRIDGE

MOTOR DRIVER 2

MPC1825AVM
DC/DC CONVERTER
BATTERY CHARGER

STEP-UP

DC/DC CONV.

CHARGE

AMPLIFIER

CHARGE

PUMP

OSC1

OSC2

REGULATOR

CHARGE

PWM2

ERROR AMP

SYSTEM

CONTROL

t

u

r

n

t

a

b

l

e

BEEP

16.9MHz

RO

ANAL.

FILTER

OUTPUT
CIRCUIT

ANAL.

FILTER

OUTPUT
CIRCUIT

MODULATION CIRCUIT

OSC.

KEYBOARD

SAWTOOTH

PWM1

ERROR AMP

LOW BATT DET.

DC-IN DETECT

BANDGAP REF.

SUB REF.

LOW VCPU DET.

+DC

VG

+µP

TREB

MUTE

DBB

CONT.

RIPPLE

FILTER

TREB

L.P.F.

Vref

LASER

POWER DOWN

CONVERTER

1)

1)

not on all versions

+3

LOBAT

SAW_CLOCK

(TO SERVO DRIVER)

3V

0

-3V

2,5V

0

-2,5V

eye-pattern signal

> 800 mVpp

TB=0.5µs

1

during focus search

TB=0.1s

9

12

10
11

3V

0

servo in or disc motor cw

not moving

servo out or disc motor ccw

servo out or disc motor cw

not moving

servo in or disc motor ccw

16

14

13

15

DATA

WCLK

left channel

MSB

LSB

MSB

LSB

right channel

SCLK

TRANSFER OF AUDIO SAMPLES VIA SERIAL INTERFACE OF CD7 AND NPCCD7 → NPC

NPC → DAC

2
3
4

5
6
7

1

14

16

15

13

9

11

1012

BLOCKDIAGRAM