PHILIPS AZ756 Service Manual

SHARON PLATFORM 4

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 .................................................2-3...2-4

Start-up procedure.............................................................2-5

Fault finding guide.....................................................2-5...2-9

Blockdiagram.....................................................................3-1

Pinning of ICs............................................................3-2...3-4

Circuit diagrams

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

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

Control part ...................................................................4-3

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

Printed circuit board

Copperside view............................................................4-5

Componentside view.....................................................4-6

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

Mechanical partslist...........................................................5-1

Electrical partslist ......................................................6-1...6-3

CS 46 427

AZ7562/00/05

Published by PW 9713 Service Audio Printed in The Netherlands Subject to modification

Portable compact disc player

PLAY

PAUSE

CLASS 1

LASER PRODUCT

AZ7565/00/05 AZ7566/17/17T

TABLE OF CONTENTS

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.

1-1

CS 46 428

TECHNICAL SPECIFICATION

General

Dimensions (WxHxD) : 134x30.5x154mm Weight without batteries : 250g

Power supply modes

DC-in socket : 4.5-5.5V Battery 2xLR6 : 1.8-3.6V Accu-pack AY3360 (NiMH) : 1.8-3.6V Accu-pack AY3361 (NiCd) : 1.8-3.6V

Battery lifetime

Battery empty detection

Battery weak level : 2.1V nom. ±150mV Battery empty level : 1.9V nom. ±100mV

Charge circuit

Charge current : 300mA ±10% Charge time for 80% : 4hrs nom. Max. charge time (µP controlled) : 6hrs 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) Max. output power (THD=10%) : 2x7mW (+1/-3dB)

Frequency response (1mW) : 20Hz-20kHz within 6dB S/N ratio (unw.) : >80dB (83dB typ.) S/N ratio (A-wght) : >85dB (88dB typ.) THD+N (1kHz, 1mW) : <1% (0.2% typ.) Channel crosstalk (1kHz, no load): <-50dB Channel unbalance (-40dB) : <1dB Volume attenuation (1kHz) : >80dB

Headphone out under CD-out conditions

(volume at maximum, load impedance 47kΩ) Output level (1kHz, 0dB) : 680Vrms ±2dB

Frequency response : 20Hz-20kHz within 4dB S/N ratio (unw.) : >85dB (90dB typ.) S/N ratio (A-wght) : >90dB (95dB typ.) THD+N (1kHz, 0dB) : <0.2% (0.05% typ.) THD+N (1kHz, -20dB) : <0.3% (0.1% typ.) Channel crosstalk (1kHz) : <-60dB (-70dB typ.) Channel crosstalk (10kHz) : <-40dB (-50dB typ.) Channel unbalance (1kHz, 0dB) : <0.5dB (0.2dB typ.)

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

Specification according to IEC958.

Laser

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

Measurement setup

Use Audio Signal disc SBC429 4822 397 30184

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

S/N and distortion meter

e.g. Sound Technology ST1700B

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DISPLAY. . . . . . . . . . . Window for showing the different playing modes, tracks and times

§ . . . . . . . . . . . . . . . . . Button for selecting the next music track or, if held down, for searching forward for a particular passage

on the CD

∞ . . . . . . . . . . . . . . . . . Button for selecting the previous music track or, if held down, for searching backward for a particular

passage on the CD

VOLUME. . . . . . . . . . . Control for adjusting the volume at the headphone output

HOLD / RESUME . . . . Switch for activating the HOLD function (blocking all buttons) and/or

RESUME function (resuming CD play)

MODE 0 . . . . . . . . . . . Button for selecting the different playing modes:

SHUFFLE

→SHUFFLE REPEAT ALL→REPEAT 1→REPEAT ALL→SCAN→off

PROG . . . . . . . . . . . . . Button for storing tracks in a program and for reviewing the program

DSP. . . . . . . . . . . . . . . Digital Sound Processing: Button for selecting the different sound settings at the headphone output:

ROCK→POP→CAR→INCREDIBLE SOUND→off

STOP 9 . . . . . . . . . . . . Button for stopping CD play, deleting various settings, switching off the CD player and activating

charging

OPEN . . . . . . . . . . . . . Slide control for opening the lid of the CD player

2; . . . . . . . . . . . . . . . . Button for starting and pausing CD play

ESA. . . . . . . . . . . . . . . Electronic Shock Absorption: Switch for activating the electronic buffer memory for an undisturbed

sound

REMOTE

p . . . . . . . . . Headphone and remote control socket (3.5mm)

Digital out (optical) . . For connecting the CD player to a Digital in (optical) socket in an amplifier or a digital recorder by means

of an optical cable

4,5 V DC . . . . . . . . . . . Socket for external power supply

Battery compartment for inserting batteries

Note: In case of power supply via the DC jack (mains adapter or cigarette lighter in the car) the display and the play button are

backlighted. In battery mode, the illumination is activated for 10 seconds after key operations.

1-2

CS 46 429

CONNECTIONS AND CONTROLS

DSP

PROGRAM

MODE

HOLD / RESUME VOLUME

DISPLAY

ESA

PLAY / PAUSE

OPEN

STOP

OPTICAL DIGITAL OUTPUT

HEADPH. / REMOTE

BATTERIES

6 V DC

1-3

CS 46 430

4MROFTALPNORAHSSEIROSSECCA

2657ZA 5657ZA 6657ZA

00/ 50/ 00/ 50/ 71/ T71/

A00/0613YA A00/0613YA

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A50/0613YA A50/0613YA

A50/0613YA

A50/0613YA A50/0613YA ROTPADACD/CA 762019122284 X X

A71/0613YA A71/0613YA

A71/0613YA

A71/0613YA A71/0613YA ROTPADACD/CA 862019122284 X X

00/0623YA 00/0623YA

00/0623YA

00/0623YA 00/0623YA HCUOP 893010062284 O O X X

00/0633YA 00/0633YA

00/0633YA

00/0633YA 00/0633YA HMiNKCAPYRETTAB 716018312284 O O X X

00/1633YA 00/1633YA

00/1633YA

00/1633YA 00/1633YA dCiNKCAPYRETTAB 516018312284 X X O O

00/1053YA 00/1053YA

00/1053YA

00/1053YA 00/1053YA ETTESSACROTPADARAC 950017932284 O O O O

71/1053YA 71/1053YA

71/1053YA

71/1053YA 71/1053YA ETTESSACROTPADARAC 850017932284 X X

00/5453YA 00/5453YA

00/5453YA

00/5453YA 00/5453YA RETREVNOCCD/CDRAC 330019122284 O O O O

71/5453YA 71/5453YA

71/5453YA

71/5453YA 71/5453YA RETREVNOCCD/CDRAC 130019122284 X X

00/3653YA 00/3653YA

00/3653YA

00/3653YA 00/3653YA ETALPROTPADARAC 690123622284 O O O O

71/3653YA 71/3653YA

71/3653YA

71/3653YA 71/3653YA ETALPROTPADARAC 101123622284 O O

00/2763YA 00/2763YA

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S00/2763YA S00/2763YA

S00/2763YA

S00/2763YA S00/2763YA ENOHPRAE 143012422284 X X

73/1863YA 73/1863YA

73/1863YA

73/1863YA 73/1863YA ENOHPDAEH 207012422284 X X

00/3673YA 00/3673YA

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00/3673YA 00/3673YA LORTNOCETOMERDCLDROC-NI 217018122284 O O X X

00/0683YA 00/0683YA

00/0683YA

00/0683YA 00/0683YA XOBREKAEPSEVITCA 315015442284 O O O O

71/0683YA 71/0683YA

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71/0683YA 71/0683YA XOBREKAEPSEVITCA 415015442284 O O

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X....supplied with the set, O....optional available

1-4

CS 46 431

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

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

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 !

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

ESD

SAFETY

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.

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 46 432

SERVICE HINTS

REPAIR POSITION COPPERSIDE

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

1. Disconnect DC-cable and headphone

2. Remove bottom screws (remember hidden screw in battery compartment)

3. Open the CD-door

4. Lift the top-cabinet

5. Close the door-switch (e.g. paper-clip)

6. Supply the unit via external DC-socket

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

1. Disconnect DC-cable and headphone

2. Remove bottom screws (remember hidden screw in battery compartment)

3. Open the CD-door

4. Lift the top-cabinet

5. Take the printed circuit board/drive unit out of the bottom (take care of battery springs)

6. Position printed circuit board/drive unit into top-cabinet

7. Supply the unit via external DC-socket

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

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 46 433

HANDLING CHIP COMPONENTS

SERVICE TEST PROGRAM

1. PRELIMINARY SETUP

• To enter the service test program hold the keys “PROGRAM”

and “STOP” depressed while turning POWER ON.

• The display shows the software-version of the built-in microprocessor (e.g. “

90S”).

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

2. DISPLAY TEST

Purpose: Check the internal display driver of the µP and the

display segments.

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

• The display shows test pattern 1. Three more test patterns are available.

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

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

“STOP” button.

3. KEY & REMOTE CONTROL TEST

Purpose: Check operation of keys and remote control.

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

• The display shows “--”.

• Press keys on the set resp. the remote control and check the

corresponding key codes on the display of the CD-player resp. the test patterns on the display of the remote control. Codes and patterns can be found in table 1 (see flow chart).

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

4. PLAYBACK TEST WITH ERROR ANALYSIS

Purpose: Analyse errors that occur during playback.

• To enter the playback test start service test program and press the “DSP” 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 as 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 table 2 (see flow chart).

Note:

Errors can either be

“fatal”

“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 till a new error occurs or a button is pressed.

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

5. IC-CHECK

Purpose: Check communication between µP ↔ CD7 and

µP ↔ NPC (DRAM controller).

• To enter the IC-check start service test program and press the “PLAY” button.

• The display shows “C

xny

”. “Cx” indicates result of CD7-check;

“n

” indicates result of NPC-check.

x,y

= ”1” means that the

test has been passed successfully;

x,y

= ”0” specifies an error

during communication.

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

6. SERVO TEST

Purpose: Check door- 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 “S

”. “x” indicates state of door-switch; “y”

indicates state of inner-switch.

x,y

= “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 “DSP” 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.

7. 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. 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 “DSP” 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.

8. 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”.

Note:

During this test the µP displays the speed-flag of the CD7. As this IC can only monitor a small range of speed deviation the displayed information is not very reliable. In case of doubt check disc motor control circuit.

• In case the disc speed 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.

9. RADIAL TEST

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

output.

• The display shows “rd”.

• The radial servo loop is switched on, mute is released and an

audio signal is audible.

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

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

• To enter the error correction analysis press the “PLAY” button,

to exit the radial test and return to the main menu press the “STOP” button.

10. ERROR CORRECTION ANALYSIS

Purpose: Check the error status of the CD7 in double speed

mode (measurement of block error rate, number of interpolations, a.s.o).

• The display shows “H”.

• The disc turns at double speed, mute is released and music is

audible with twice the normal speed.

Note:

This test program is used for statistical analysis of the error correction of the CD7. As the test requires additional hard- and software it can´t be carried out at “normal” repair shops.

• To exit the error correction analysis and return to the main menu press the “STOP” button.

2-3

CS 46 434

2-42-4

CS 46 435

table1 – key & RC-test

DISPLAY CORD RC

no change

DISPLAY SET



01

02

03

04

05

07



rC 01



rC 03



rC 05



rC 06

KEYS OF SET

PLAY MODE NEXT DSP PREVIOUS PROGRAM

KEYS OF CORD-REMOTE CONTROL

(not on all versions)

PLAY

STOP

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

PRELIMINARY

SETUP

EXIT

SERVICE TEST

PROGRAM

Display shows

software-version

(e.g. “90

S”)

DISPLA Y TEST

Display shows

test pattern 1

KEY & RC-TEST

Display shows

“--”

SERVO TEST Display shows

“S

”

To enter service test program hold “PROGRAM” & “STOP”-button depressed, while turning POWER ON.

Remark: Playback test can only

be entered if CD-door is closed!

IC-CHECK

Display shows

“C

ny”

FOCUS TEST

CUE-MODE

Track servo jumps

16 tracks forward

RADIAL TEST Display shows

“rd”

STATUS OF

ERROR CORR.

Display shows "H"

“NEXT”

pressed?

“MODE”

pressed?

“DSP”

pressed?

“PLAY”

pressed?

“PLAY”

pressed?

Error during

playback?

FOCUS

found?

“PLAY”

pressed?

“PLAY”

pressed?

“PLAY”

pressed?

“NEXT”

pressed?

REVIEW-MODE

Track servo jumps

16 tracks backw.

“PREV”

pressed?

Disc motor

at nom.speed

Display shows

“F”

Fatal error?

Display shows

error-code

PLAYBACK

TEST

DISC MOT. TEST

Disc motor is on

Display shows

“-F”

Slide moves

outside

Slide moves

inside

Display shows

“d”

Display shows

“-d”

“NEXT”

pressed?

“PLAY”

pressed?

“PLAY”

pressed?

“PLAY”

pressed?

Display shows

test pattern 3

Display shows

test pattern 2

“PREV”

pressed?

“MODE”

pressed?

“DSP”

pressed?

Stop playback

Press keys

and check display

acc. to table1

MAIN MENU

CODE

E 1001

E 1002 E 1003

E 1004 E 1005

E 1011

E 1012

E 1013 E 1014

E 1018

E 1019

ERROR

sledge out error

focus error radial error

subcode error DRAM filling

error sledge in error

focus search error

fatal radial error fatal subcode

error motor N1 error

motor N2 error

TYPE

non fatal

non fatal non fatal

fatal

fatal fatal

fatal

CAUSE

The sledge did not come out of it´s inner position (inner switch of CDM12 doesn´t open) before 240ms have passed by.

Focus point lost. The offtrack values of CD7 don´t

decrease properly when jumping tracks, or CD7 indicates offtrack while radial tracking is switched on.

No valid subcode information for 250ms. The DRAM controller was not able to

connect two consecutive audio frames. The sledge did not reach it´s inner pos.

(inner switch of CDM12 doesn´t close) before 6 seconds have passed by.

The focus point could not be found inbetween 4 seconds.

Radial error occured 15 times. No valid subcode information for

3.5 seconds. The disc didn´t reach 75% of the

nom. single speed inbetween 4.5 sec. The disc didn´t reach 75% of the

nom. double speed inbetween 4.5 sec.

test pattern 1

table2 – playback error analysis

test pattern 2

test pattern 3

Disc motor turns

clockwise

(accelerate)

Disc motor turns

counter-clockwise

(brake)

Slide moves

outside

Slide moves

inside

“NEXT”

pressed?

“PREV”

pressed?

“MODE”

pressed?

“DSP”

pressed?

Disc motor turns

clockwise

(accelerate)

Disc motor turns

counter-clockwise

(brake)

....result of CD7-check

....result of NPC-check

x,y

= “1” means test OK

....state of door switch

....state of inner switch

x,y

= “1” means switch open

ATTENTION: LASER IS SWITCHED ON

→ AVOID DIRECT EXPOSURE TO BEAM !!

FLOW CHART

+ 19 hidden pages