Philips AZ-2048 Service manual

CD Sound Machine

AZ 2048

all versions

Handling Chip Components and Safety ..........................1 - 1

Technical Specification & Service tools...........................2 - 1

Service Measurement......................................................2 - 2

Connections and controls.......................................3 - 1..3 - 2

Instructions for use.................................................3 - 3..3 - 5

Tuner adjustment.............................................................3 - 6

Disassembly Diagram......................................................4 - 1

CD Service Test program.....................................4 - 2 .. 4 - 3

Block Diagram .................................................................5 - 1

Wiring Diagram................................................................5 - 2

Key Board

Circuit diagram........................................................6 - 1

Combi Board - Circuit Diagram

Front part.................................................................6 - 2

Tuner part................................................................7 - 1

Combi Board - Circuit Diagram

CD part 1 ................................................................8 - 1

CD part 2 ................................................................8 - 2

AF part.....................................................................9 - 1

Combi Board - Layout Diagram

Layout diagram (copper side)................................10 - 1

Layout diagram (component side).........................10 - 2

MP3-CD2002 BAORD

Circuit diagram......................................................11 - 1

Layout diagram......................................................11 - 2

Exploded view - cabinet.................................................12 - 1

Mechanical partslist.......................................................12 - 1

Electrical partslist .............................................13 - 1 .. 13 - 9

© 3140 785 32130

Published by LX 0226 Service Audio Printed in The Netherlands Subject to modification

TABLE OF CONTENTS

©

Copyright 2001 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.

CLASS 1

LASER PRODUCT

HANDLING CHIP COMPONENTS

© 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 Puls-
armband 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 Original-
ersatzteile 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.

1 - 1

GENERAL

Mains voltage -/00 : 230 V

-/01

-/01

: 120 / 230 V

Mains freq. -/00 : 50 Hz

: 50 / 60 Hz

Battery main set : 9 V (R20, UM1 x 6)

remote : 3V (R03, AAA x 2)
Power consumption : < 35 W (max.)
Dimension (W x H x D) : 471 x 153 x 251 mm
Weight : 3.8 Kg

AMPLIFIER

Output power mains : 2 x 1.6 W

BASS - 100 Hz : +6 / -14 dB

MID - 1K Hz : +8 / -8 dB

HIGH - 10K Hz : +10 / -10 dB

DBB on : +8 dB

battery : 2 x 1.6 W
Speaker impedance : 2 x 4 oh m
Frequency response :

TUNER - FM SECTION

Tuning range : 87.5 - 108 MHz
IF frequency : 10.7 MHz – 0.2 MHz
Sensitivity : 20 dBf at 26dB S/N
Selectivity : 24 dB at 300kHz
IF rejection : 85 dB
Image rejection : 24 dB

TUNER - AM SECTION

Tuning range MW : 531 - 1602 kHz

LW : 153 - 279 kHz
IF frequency : 450 kHz – 1 kHz
Sensitivity MW : 3200 µV/m at 26dB S/N

LW : 5500 µV/m at 26dB S/N
Selectivity MW : 22 dB

LW : 29 dB
IF rejection MW : 64 dB

LW : 60 dB
Image rejection MW : 32 dB

LW : 38 dB

COMPACT DISC

Frequency response : 100 Hz - 10 kHz – 2dB
S/N ratio : 60 dB
Channel difference 1 kHz : 2 dB
Channel crosstalk 1 kHz : 40 dB
Laser wavelength : 780 – 20 nm
Laser light power : < 0.5 mW

2 - 1

SERVICE TOOLS

Audio signal disc SBC 429.......................................................................4822 397 30184

Playability test disc SBC 444

...................................................................4822 397 30245

Test disc 5 (disc without errors ) +
Test disc 5A (disc with dropout errors, black spots and fingerprints)

SBC 426/426A.....................................................................4822 397 30096

Burn in test disc (65 min. 1kHz signal at -30 dB level without “pause”)

.....4822 397 30155

anti-static table mat

large 1200x650x1.25mm  4822 466 10953

small 600x650x1.25m 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

AVAILABLE ESD PROTECTION EQUIPMENT

TECHNICAL SPECIFICATIONS

2 - 2

SERVICE MEASUREMENT

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

DUT

RF Generator

e.g. PM5326

S/N and distortion meter

e.g. Sound Technology ST1700B

Tuner SW

To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday«s cage.
Use a bandpass filter (or at least a high pass filter with 250Hz) to eliminate hum (50Hz, 100Hz).

Ri=50Ω

Aerial replacement

Capacitor

R=50Ω

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

DUT

S/N and distortion meter

e.g. Sound Technology ST1700B

Frame aerial

e.g. 7122 707 89001

Tuner AM (MW,LW)

To avoid atmospheric interference all AM-measurements have to be carried out in a Faraday«s cage.

RF Generator

e.g. PM5326

Ri=50Ω

Low pass filter 22kHz

L

R

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

S/N and distortion meter

e.g. Sound Technology ST1700B

DUT

CD

Use Audio Signal Disc SBC429 4822 397 30184 (replaces test disc 3)
L.P.F. = 13

th

order filter 4822 395 30204

3 - 1

678

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4

CONNECTIONS AND CONTROLS

3 - 2

English

CONTROLS

POWER SUPPLY BASIC FUNCTIONS

TOP AND FRONT PANELS

(See

1

)

1SOURCE

– selects CD/ TUNER function

2STANDBY y

– power on/ standby switch

(If the set is battery powered, this functions as

power on/ off)

3BASS, MID, HIGH

– EQ keys to adjust the bass,

mid & treble frequencies

4PROG

CD: programmes tracks and reviews the

programme;

Tuner: programmes preset radio stations

5

Navigation controls

∞

,

§

MP3-CD: – searches back and forward within a

track;

– skips to the beginning of a current

track/ previous/ later track

Tuner: – tunes to radio stations (down, up).

2;

– starts or pauses CD playback

9

– stops CD playback;

– erases a CD programme

6Door

7REMOTE SENSOR

– infrared sensor for remote

control

8VOLUME

– to adjust volume level

9MODE

– selects different play modes:

e.g.

REPEAT

or

SHUFFLE

(random) order

0PRESET/ ALBUM

(

–, +

) –

MP3-CD (only): – selects previous/ next album

Tuner: – selects the previous/ next preset

station

!BAND/ DISPLAY

–

MP3-CD: – shows various text and time

information during playback

Tuner: – selects waveband

@DBB

– (Dynamic Bass Boost) activates a more

vivid bass response

#Display

– shows the status of the set

BACK PANEL

$Te lescopic aerial

– improves FM reception

%Battery compartment

– for 6 batteries,

type R-20, UM1 or D-cells

^Voltage selector

(inside battery compartment,

some versions only) – adjust to match the local

voltage 110/220V before plugging in the set

&p

– 3.5 mm stereo headphone socket

Note: The speakers will be muted when

headphones are connected to the set.

*AC MAINS

– inlet for mains lead

REMOTE CONTROL

(See

2

)

1CD

– selects CD sound source

2y

– switches the set to standby/ on if set

operating on AC power. (Switches set off only if

battery powered)

3VOLUME 3

,

4

– adjusts volume level (up, down)

4SHUFFLE

– plays MP3-CD/ CD tracks in random

order

5BASS

– selects DBB on/off

62;

– starts/ pauses MP3-CD/ CD playback

7SEARCH 5

,

6

– searches backwards/ forwards

within a MP3-CD/ CD track

8BAND

– selects FM/ MW (LW) waveband

9PRESET +, –

(up, down) –

MP3-CD (only): – selects previous/ next album

Tuner: – selects the previous/ next preset

station

0TUNING ∞

,

§

– tunes to tuner stations

(down, up)

!TUNER

– selects tuner sound source

@9

– stops MP3-CD/ CD playback;

– erases a MP3-CD/ CD programme

#¡

,

™

– skips to the beginning of a current track

previous/ subsequent track

$MUTE

– interrupts/ resumes sound

%REPEAT

– repeats a track /programme/ entire

MP3-CD/ CD

CAUTION

Use of controls or adjustments or performance of

procedures other than herein may result in hazardous

radiation exposure or other unsafe operation.

IMPORTANT!

For users in the U.K.: please follow the instructions on

the upper righthand-side.

MAINS SUPPL

Y

Whenever convenient, use the mains supply to

conserve battery life. Make sure you remove the

power plug from the set and wall socket before

inserting batteries.

Batteries

(not included)

• Insert 6 batteries, type

R-20

,

UM-1

or

D-cells

,

(preferably alkaline) with the correct polarity.

Remote control (see A)

• Insert 2 batteries, type

AAA

,

R03

or

UM4

(preferably alkaline).

Incorrect use of batteries can cause electrolyte

leakage and will corrode the compartment or cause

the batteries to burst.

•Do not mix battery types: e.g. alkaline with carbon

zinc. Only use batteries of the same type for the

set.

•When inserting new batteries, do not try to mix old

batteries with the new ones.

• Batteries contain chemical substances, so

they should be disposed of properly.

Using AC Mains

1 Check if the mains supply, as shown on

the type

plate located on the bottom of the set

,

corresponds to your local mains supply. If it does

not, consult your dealer or service centre.

2 If your set is equipped with a voltage selector,

adjust the selector so that it matches with the

local mains.

3 Connect the mains lead to the wall socket.

4 To disconnect the mains supply, unplug the set

from the wall socket.

Auto-Standby mode

When the MP3-CD/CD player has reached the end of

playback and remains in the stop position for more

than 15 minutes, the set will switch off automatically

to save energy.

The type plate is located on the bottom of the

set.

BASIC FUNCTIONS

Switching on and off and selecting function

1 Press

STANDBY y

on the set to switch on.

2 Press

SOURCE

once or more to select:

CD

or

TUNER

function.

3 Press

STANDBY y

to switch off the set.

Note: The tone, sound settings, tuner presets and the

volume level (up to a maximum volume level of

20) will be retained in the set’s memory.

Adjusting volume and sound

1 Adjust the volume with the

VOLUME

control.

™

Display shows the volume level and a number

from 0-32.

2 Press

DBB

once or more to select dynamic bass

boost on or off.

™

Display: shows

DBB ON

or

DBB OFF

when

activated/deactivated.

3 To adjust the bass, mid and treble tones, press and

hold

+

or

–

on the

BASS, MID, HIGH

keys until

you reach the desired level.

™

Display briefly shows

BASS

,

MID

, or

HIGH

and the

level.

Note: To prevent sound interference the bass control

options operate exclusively. You cannot

combine the bass from BASS with DBB.

CONNECTIONS AND CONTROLS

3 - 3

Mute

1 Press

MUTE

on the remote control to interrupt

sound reproduction instantly.

™

Playback continues without sound and the

display flashes .

2 To reactivate sound reproduction you can:

– press

MUTE

again;

– adjust the volume controls;

– change source.

DIGITAL TUNER

Tuning to radio stations

1 Press

STANDBY y

to on, then press

SOURCE

to

select

TUNER

.

– is displayed briefly and then the radio

station frequency, waveband and, if programmed,

a preset number are shown.

2 Press

BAND/ DISPLAY

once or more to select

your waveband.

3 Press and hold

∞

or

§

until the frequency in the

display starts running.

™

The radio automatically tunes to a station of

sufficient reception. Display shows

during automatic tuning.

™

If a FM station is received in stereo, is

shown.

4 Repeat steps 2-3 if necessary until you find the

desired station.

•To tune to a weak station, press

∞

or

§

briefly

and repeatedly until you have found optimal

reception.

To improve radio reception:

• For

FM

, extend, incline and turn the telescopic

aerial. Reduce its length if the signal is too strong.

• For

MW (LW)

, the set uses a built-in aerial. Direct

this aerial by turning the whole set.

Programming radio stations

You can store up to a total of 30 radio stations in the

memory, manually or automatically (Autostore).

Manual programming

1 Tune to your desired station (see Tuning to radio

stations).

2 Press

PROG

to activate programming.

3 Press

PRESET DOWN/ UP

once or more to select

a preset number.

4 Press

PROG

to confirm.

5 Repeat steps 1-4 to store other stations.

Note: You can erase a preset station by storing

another frequency in its place.

Autostore

Autostore automatically starts programming radio

stations from preset 1. Available stations are

programmed in order of waveband reception strength:

FM, followed by MW (LW). Any previous presets e.g.

manually programmed will be erased.

• Press

PROG

for 4 seconds or more to activate

autostore programming.

™

The display shows .

After all stations are stored, the first autostore preset

station will then automatically play.

To listen to a preset or autostore station

Press the

PRESET

(up or down) buttons once or more

until the desired preset station is displayed.

BASIC FUNCTIONS DIGITAL

MP3-CD/CD player

Important Specifications

Supported formats:

•Disc format ISO9660, Joliet and multi-session CDs.

Use ISO9660 disc format when burning CD-ROM.

•MP3 music formats.

•MP3 bit rate (data rate): 32-320 Kbps and variable

bit rate.

• 650Mb and 700Mb CD-R and CD-RWs.

•Directory nesting up to a maximum of

8 levels (max. 64 characters).

General information

The music compression technology MP3 (MPEG Audio

Layer 3) reduces the original digital audio data by a

factor up to 10 without losing significant sound

quality. This allows you to record up to 10 hours of

CD-like quality music on a single CD-ROM.

How to get MP3 music

Either download legal MP3 music from the internet or

convert your audio CD into MP3 format with any MP3

encoder software, and then record onto a CD-R(W).

•To achieve a good sound quality a bit rate of

128 kbps is recommended for MP3 files.

•Some encoder software offers an option to protect

music files, i.e. the files can only be played on the

computer which created them. If you burn such

files on a CD-ROM, you cannot play them on this

set. Make sure to deactivate the protection option

in the encoder software before creating the music

files. In this case you are responsible for the

adherence to all local or international copyrights.

When burning the MP3-CD

•To avoid problems with playback or missing files,

make sure the file names are typed in English text

characters and that the MP3 files end with .mp3

•Use a writing software capable of recording MP3

track titles (files) in numerical and alphabetical

order. For details on using the software, refer to

the operating instructions of the software.

•When recording on a CD-RW, make sure that you

close (finalize) all sessions in order for the set to

read and play your tracks.

How to organize MP3 files

You can store up to a maximum number of 35 albums

and 400 titles on one MP3-CD, depending on the song

file sizes.

Albums and titles are alphabetically sorted.

•MP3-CD/ CD albums and titles are shown as

numbers in the display.

IMPORTANT

This set does not play/support the following:

•Empty albums: an empty album is an album that

does not contain MP3 files, and will not be shown

in the display.

•Non-supported file formats are skipped. This

means that e.g.: Word documents .doc or MP3 files

with extension .dlf are ignored and will not be

played.

• Playlist Files e.g. .m3u, .pls of WMA, AAC,

Winamp, Sonic, RealJukebox,

MS Mediaplayer 7.0, MusicMatch.

•Recordings created on e.g. PacketWriting and

Package Writing.

MP3-CD/CD PLAYER

INSTRUCTIONS FOR USE

3 - 4

Different play modes: SHUFFLE and REPEAT

(See

4

)

You can select and change the various play modes

and combine the modes with

PROGRAM

.

shuffle

– tracks of the entire disc/ program are

played in random order

shuffle

and

repeat all

– to repeat the entire disc/

programme continuously in random order

repeat all

– repeats the entire disc/ program

repeat

(and

shuffle repeat

) – plays the current

(random) track continuously

1 To select play mode, press

MODE

once or more.

2 Press

2;

to start playback if in the stop position.

3 To select normal playback, press

MODE

repeatedly

until the various modes are no longer displayed.

– You can also press

9

to cancel your play mode.

Programming track numbers

In the stop position, select and store your tracks in the

desired sequence. Up to 20 tracks can be stored in the

memory.

1 Press

∞

or

§

on the set to select your desired

track number.

MP3-CD mode only:

First press

ALBUM, PRESET +

or

–

once or more to

find your album, then press

SEARCH ∞

or

§

.

2 Press

PROG

.

™

Display: and the selected track

number. appears briefly.

™

Display: if no track selected

for programming.

3 Repeat steps 1-2 to select and store all desired

tracks.

™

Display: if you try to

programme more than 20 tracks.

Reviewing the programme

In the stop position, press and hold

PROG

until the

display shows all your stored track numbers in

sequence.

™

Display: if no tracks

programmed.

Erasing a programme

You can erase the programme by:

• pressing

9

twice;

™

is displayed briefly and

disappears.

• selecting

TUNER

source.

Maintenance & Safety

CD player and disc handling

(See

5

)

• If the CD player cannot read CDs correctly, use a

cleaning CD to clean the lens before taking the set

to repair.

•The lens of the CD player should never be touched!

• Sudden changes in the surrounding temperature

can cause condensation on the lens of your CD

player. Playing a CD is then not possible. Do not

attempt to clean the lens but leave the set in a

warm environment until the moisture evaporates.

•Always close the CD door to avoid dust on the

lens.

•To clean the CD, wipe in a straight line from the

centre towards the edge using a soft, lint-free

cloth. Do not use cleaning agents as they may

damage the disc.

• Never write on a CD or attach any stickers to it.

Safety Information

•Don’t expose the set, batteries or CDs to humidity,

rain, sand or excessive heat.

•Clean the set with a dry cloth. Don’t use any

cleaning agents containing alcohol, ammonia,

benzene or abrasives as these may harm the set.

•Place the set on a hard and flat surface so that the

system does not tilt. Make sure there is good

ventilation to prevent the set overheating.

Playing MP3-CD & CD

This CD player plays Audio Discs including CD-R(W)s,

and MP3 CD-ROMs.

• CD-I, CDV, VCD, DVD or computer CDs, are not

possible.

1 Press

STANDBY y

to on, then

SOURCE

to select

CD.

2 Open the CD door.

™

Display: when the CD door is

opened.

3 Insert a disc with the printed side facing up and

close the CD door.

™

Display: when reading disc contents;™Display: if no disc inserted/ disc

incorrectly inserted.

™

Display: if disc damaged/ dirty:

– CD throughout CD operation;

– MP3CD throughout MP3-CD operation;

– In CD stop mode: total track number and total

playback time.

™

is shown if you have

inserted a non-finalized CD-R(W)/ blank disc.

Note: MP3-CDs may take more than 10 seconds to

read.

4 Press

2;

to start playback

™

Display: Current track number and elapsed track

time during CD playback.

™

If MP3-CD, the album number also is shown.

5 To pause playback press

2;

. Press

2;

again to

resume play.

6 To stop CD playback, press

9

.

7 Press

STANDBY y

to switch of the set.

Note: CD play will also stop when:

– the CD door is opened;

– the CD has reached the end;

– you select tuner source.

MP3-CD/ CD text display

During playback, press the

DISPLAY

button briefly

and repeatedly to view text information:

MP3-CDs

(See

3

)

Press

DISPLAY

once or more to view e.g.

- title name and elapsed track time;

- album name and elapsed track time;

- album number, track number and elapsed track

time;

-ID3 tag details, if available. Otherwise, display

shows .

CDs

Press

DISPLAY

once or more to view e.g.

-Current track number and elapsed track time during

CD playback;

-Remaining playback time of current track.

Selecting a different track

MP3-CD mode only:

First press

ALBUM, PRESET +

or

–

once or more to

find your album. Then follow the next 2 steps.

™

Display: if no albums are

available.

• Press

∞

or

§

on the set, once or repeatedly to

select.

•

In the pause/stop position, press

2;

to start

playback.

Finding a passage within a track

1 Press and hold

∞

or

§

.

™

The CD is played at high speed and low volume.

™

No sound is heard during MP3 fast cue/review.

2 When you recognize the passage you want, release

∞

or

§

to resume normal playback.

MP3-CD/CD PLAYER

MP3-CD/CD PLAYER MAINTENANCE & SAFETY

INSTRUCTIONS FOR USE

3 -5

If a fault occurs, first check the points listed below before taking the set for repair.
Do not open the set as there is a risk of electric shock.
If you are unable to remedy a problem by following these hints, consult your dealer or service centre.

WARNING:

Under no circumstances should you try to repair the set yourself, as this will invalidate the
guarantee.

– Problem

•Solution

Remote control does not function properly

–Batteries exhausted/ incorrectly inserted

• Insert (fresh) batteries correctly

–Distance/ angle between the set too large

•Reduce the distance/ angle

No sound /power

–Volume not adjusted

•Adjust the VOLUME

–Mains lead not securely connected

•Connect the AC mains lead properly

–Batteries exhausted/ incorrectly inserted

• Insert (fresh) batteries correctly

–Headphones connected to the set

•Disconnect headphones

–Electrostatic discharge/interference

•Unplug the set. If batteries inserted, remove
batteries from the battery compartment. Press and
hold STANDBY

y

on the set for 10 seconds, then
re-plug / replace battery supply, and try activating
the set again

Severe radio hum or noise

– Electrical interference: set too close to TV, VCR or

computer

•Increase the distance

Poor radio reception

–Weak radio signal

•FM: Adjust the FM telescopic aerial

/indication

–No CD inserted

• Insert a suitable disc

– CD badly scratched or dirty

•Replace/ clean CD, see Maintenance

– Laser lens steamed up

•Wait until lens has cleared

indication

–CD-R(W) is blank/ not finalized

•Use a finalized CD-R(W)

The CD skips tracks

– CD damaged or dirty

•Replace or clean CD

– SHUFFLE or PROGRAM is active

• Switch off SHUFFLE / PROGRAM

Sound skips during MP3 playback

–MP3 file made at compression level exceeding

320 kbps.

•Use a lower compression level to record CD tracks
into MP3 format.

–Disc damaged or dirty.

•Replace or clean disc.

Cannot play/ find desired MP3 titles

–Wrong file extension used and/ or filename

unsuitable text characters used.

•Make sure the file names are typed in English text
characters and that the MP3 files end with .mp3

TROUBLE SHOOTING

3 - 6

VARICAP ALIGNMENT

FM RF

FM IF

VCO

AM IF

AM RF

3)

108MHz

87.5MHz

(65.81MHz)

87.5MHz

(65.81MHz)

87.5MHz

(65.81MHz)

279kHz
153kHz

1602kHz

531kHz

5130

check

5122

check

5123

check

8V –0.2V

4.3V –0.5V

(1.2V –0.5V)

8V –0.2V

1.1V –0.4V
8V –0.2V

1.1V –0.4V

1494kHz

558kHz

560kHz

1500kHz

5105

LW ferrite coil

198kHz

1494kHz

558kHz

560kHz

1500kHz

198kHz

2106
5104

MW ferrite coil

5104

MW ferrite coil

2106

3142 152kHz –1kHz

1)

98MHz

5112

MAX

FM

87.5 - 108MHz

(65.81 - 74, 87.5 - 108MHz)

LW

153 - 279kHz

MW

FM/MW/LW- version, 9kHz grid

531 - 1602kHz

1700kHz

530kHz

5123

check

8V –0.2V

1.1V –0.4V

1602kHz

531kHz

5123

check

6.9V –0.2V

1.1V –0.4V

108MHz

108MHz 2155

5131

MW

FM/AM-version, 10kHz grid

530 - 1700kHz

FM

MW

LW

98MHz, 1mV

continuous wave

450kHz

connect pin 6 of

IC 7101 (AM Osc.)

with 2.2k‰ to Vcc

Use Service Testprogram. By selecting the TUNER TEST test frequencies will be stored as preset frequencies automatically.

4

1

3

5

5

A

A

5119FM

10.7MHz, 45mV

continuous wave

2D

mod=1kHz

∆f=–22.5kHz

1)

If sensitivity of frequency counter is too low adjust to max. channel separation

(input signal: stereo left 90% + 9%, adjust output on right channel to minimum)

Repeat

ECO6, general with ferrite antenna, 070799

TUNER ADJUSTMENT TABLE ( ECO6 FM/MW- and FM/MW/LW - versions with ferrite antenna)

∆f=–10kHz

VRF = 0.5mV

C

see
remark

2)

220R

100nF

36

IC 7101

220R

100nF

40

IC 7101

2141

shortcircuit
to block AFC

21

IC 7101

max.

symmetric

f

o

AM AFC

MW

C

continuous wave

VRF = 2mV

5111

5114

2

0 – 2 mV DC

0 – 3 mV DC

MW

FM/MW/LW- and FM/MW-version
( 9kHz grid)

531 - 1602kHz

B

∆f = –30kHz
VRF as low as
possible

max.

symmetric

f

o

MW

FM/AM-version, 10kHz grid

530 - 1700kHz

2)

RC network serves for damping the IF-filter while adjusting the other one.

3)

LW has to be aligned before MW.

Waverange Input frequency Input Tuned to Adjust Output Scope/Voltmeter

FM

87.5 - 108MHz

(65.81 - 74, 87.5 - 108MHz)

FM/MW-version, 9kHz grid

531 - 1602kHz

(as low as

possible)

A2

A1 (x9)

B3(x3)

C4 (x2)

C5 (x4)

D6 (x4)

E7 (x6)

A. REMOVE FRONT CABINET ASSEMBLY

- REMOVE SCREWS A1 (3X20) 9 PCS.

- REMOVE SCREW A2 (3X10) 1 PC
(INSIDE CD DOOR)

E. REMOVE CD PANEL-FRONT ASSEMBLY

- REMOVE SCREWS E7 (2.5X10) 6 PCS.


B. REMOVE BACK CABINET ASSEMBLY.

- REMOVE SCREWS B3 (3X10) 3 PCS. 

C. REMOVE COMBI BOARD ASSEMBLY

- REMOVE SCREWS C4 (3X10) 2 PCS.

- REMOVE FIXING BRACKETS

- REMOVE SCREWS C5 (3X10) 4 PCS.

D. REMOVE DECK MECHANISM 

- REMOVE SCREWS D6 (2.5X10) 4 PCS.

- REMOVE CD DECK

4 - 14 - 1

DISASSEMBLY DIAGRAM