Philips FWM-572 Service Manual

Service

Mini System

Service Service

Service

FWM372/all versions FWM572/all versions

Service Manual

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.

Published by SL0612 Service Audio Printed in The Netherlands Subject to modification.

Version 1.1

TABLE OF CONTENTS

Page

Location of PC Boards................................................1-2

Versions Variation & Package .................................... 1-2

Specifications..............................................................1-3

Measurement Setup ................................................... 1-4

Service Aids, Safety Instruction, etc................ 1-5 to 1-7

Preparations & Controls ................................ 1-8 to 1-10

Maintenance & Troubleshooting............................... 1-11

Setting Procedure & Repair Instructions ....................... 2

Disassembly Instructions & Service positions .............. 3

Block Diagram ............................................................... 4

Wiring Diagram .............................................................. 5

Front Board & Key Board .............................................. 6

ECO6 Tuner Board : Systems Non-Cenelec.............. 7A

Systems Cenelec...................... 7B

ETF7 Tape Board ........................................................... 8

Mains Board ................................................................... 9

Power Board ................................................................ 11

AF9 Board .................................................................... 12

Mechanical Exploded View & Parts List ...................... 13

Revision List ................................................................ 14

CLASS 1

LASER PRODUCT

3141 785 30861

LOCATION OF PCBS

1-2

ETF7 Tuner Module

Power Board

AF9 Board

Front Board

Cass

CD Key Board

Board

VERSION VARIATIONS:

Type /Versions: FWM372/FWM572

Features & Board in used:

Karaoke

News x

RDS

Rotary Encoder (volume control) x x x

Jog Shuttle

Voltage Selector

Aux Input x x x

Digital Output

Headphone Socket x x x

Line Output

Matrix Surround Loudspeakers

Standby - FTD Clock Display x x

ECO Standby - Dark

ECO6 Tuner board - System Non-Cenelec

ECO6 Tuner board - System Cenelec

ETF7 Tape Module: Non-Autoreverse Ferro x x x

USB Direct

/05 /12 /55

xxx

Mains Board

SPECIFICATION

1-3

GENERAL:

Mains voltage : 230V ± 10% /05/12

127V ± 15% / 240V ± 10% /55/98

Mains frequency : 50/60Hz

Power consumption : < 1W at ECO Standby /05/12

< 15W Standby w/Clock on

< 60W < 110W

Active /FWM372 Active /FWM572

Clock accuracy : < 2 seconds per day

Dimension centre unit : 265(W) x 310(H) x 367(D)mm

TUNER:

Tuning range : 87.5-108MHz

Grid : 100kHz

IF frequency : 10.7MHz ± 20kHz

Aerial input :

75Ω coaxial Sensitivity at 26dB S/N : < 22dBf

Selectivity at 300kHz bandwidth : > 25dB

IF rejection : > 75dB

Image rejection : > 25dB

Distortion at RF=1mV, dev. 75kHz : < 3%

-3dB Limiting point : < 23.5dBf

Crosstalk at RF=1mV, dev. 40kHz : > 18dB

Tuning range : 531-1602kHz

530-1700kHz for /55/98

Grid : 9kHz

10kHz for /55/98

IF frequency : 450kHz ± 1kHz

Aerial input : Frame aerial 18.1µH

Sensitivity at 26dB S/N : < 4.0mV/M

Selectivity at 18kHz bandwidth : > 18dB

IF rejection : > 45dB

Image rejection : > 28dB

Distortion at RF=50mV, m=80% : < 5%

CASSETTE RECORDER:

Number of track : 2 x 2 stereo

Tape speed : 4.76 cm/sec ± 2%

Wow and flutter : < 0.4% DIN

Fast-wind/rewind time C60 : 130 sec

Bias system : 75kHz ± 10kHz

Rec/Pb frequency response within 8dB : 80Hz - 12.5kHz

Signal to noise ratio Type : > 48dBA

COMPACT DISC:

Measurement done at output conn. of the CDC module.

Frequency response within ± 1.5dB : 20Hz - 20kHz

Output level (in Vrms) : 550mV ±1dB, R

= 100Ω

out

Signal/Noise ratio (A-weighted) : > 70dBA

Distortion at 1kHz : < 0.003%

Channel unbalance at 1kHz : ±2dB

Crosstalk at 1kHz : > 55dB

De-emphasis : 0 or 15/50 mS (Switched by subcode

on the disc)

MPEG 1 Layer 3 (MP3-CD) : MPEG AUDIO

MP3-CD Bit Rate : 56-256 kbps

MP3-CD Sampling Frequencies : 32 kHz, 44.1kHz,

48kHz

Recording Format : ISO 9660

UDF format not

supported

USB:

Measurement done at speaker terminals across 6Ω load w/ 500mW output and DSC setting in Jazz Mode.

Frequency response within ± 3dB : 100Hz - 16kHz

Signal/Noise ratio (A-weighted) : > 60dBA

Channel crosstalk at 1kHz : > 35dB

Channel unbalance at 1kHz : ±3dB

AMPLIFIER:

Output power (6Ω, 1 kHz, 10% THD) : 2 x 60W RMS

/FWM372

:2 x 110W RMS

/FWM572

Frequency response within -3dB : 125Hz-16kHz

Dynamic Bass Boost : DBB OFF, DBB 1, DBB 2, DBB 3

Digital Sound Control : Jazz, Rock, Techno, Optimal

Headphone output at 32KΩ : 700mV ± 2dB

Input sensitivity

Aux / CDR : 350mV /900mV

MEASUREMENT SETUP

Tuner FM

1-4

Bandpass

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

DUT

250Hz-15kHz

e.g. 7122 707 48001

Ri=50Ω

S/N and distortion meter

e.g. Sound Technology ST1700B

Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).

Tuner AM (MW,LW)

RF Generator

e.g. PM5326

Ri=50Ω

DUT

Frame aerial

e.g. 7122 707 89001

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

S/N and distortion meter

e.g. Sound Technology ST1700B

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).

Use Audio Signal Disc (replaces test disc 3)

DUT

SBC429 4822 397 30184

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

Recorder

Use Universal Test Cassette CrO2 SBC419 4822 397 30069

or Universal Test Cassette

LF Generator

e.g. PM5110



Fe SBC420 4822 397 30071

DUT

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

SERVICE AIDS

1-5

Service Tools:

Universal Torx driver holder .................................4822 395 91019

Torx bit T10 150mm ...........................................4822 395 50456

Torx driver set T6-T20 .........................................4822 395 50145

Torx driver T10 extended .....................................4822 395 50423

Compact Disc:

SBC426/426A Test disc 5 + 5A ...........................4822 397 30096

SBC442 Audio Burn-in test disc 1kHz .................4822 397 30155

SBC429 Audio Signals disc .................................4822 397 30184

Dolby Pro-logic Test Disc ....................................4822 395 10216

HANDLING CHIP COMPONENTS

ESD Equipment:

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

anti-static table mat - small 600x650x1.25mm .....4822 466 10958

Anti-static wristband ............................................4822 395 10223

Connectorbox (1MΩ) ..........................................4822 395 11307

Extension cable

(to connect wristband to conn.box) ..........4822 320 11305

Connecting cable

(to connect table mat to conn.box) ...........4822 320 11306

Earth cable (to Connect product to mat or box) --4822 320 11308

Complete kit ESD3

(combining all above products) ...............4822 320 10671

Wristband tester ...................................................4822 344 13999

WARNING

All ICs and many other semi-conductors 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 wrist wrap with resistance. Keep components and tools also at this potential.

ATTENTION

Tous les IC et beaucoup d’autres semi-conducteurs sont sensibles aux décharges statiques (ESD). Leur longévité pourrait être considérablement écourtée par le fait qu’aucune précaution n’est prise à leur manipulation. Lors de réparations, s’assurer de bien être relié au même potentiel que la masse de l’appareil et enfiler 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.

1-6

ESD

WARNUNG

Alle ICs und viele andere Halbleiter sind empfindlich gegenüber elektrostatischen Entladungen (ESD). Unsorgfältige Behandlung im Reparaturfall kan die Lebensdauer drastisch reduzieren. Veranlassen Sie, dass Sie im Reparaturfall über ein Pulsarmband mit Widerstand verbunden sind mit dem gleichen Potential wie die Masse des Gerätes. Bauteile und Hilfsmittel auch auf dieses gleiche Potential halten.

WAARSCHUWING

Alle IC’s en vele andere halfgeleiders zijn gevoelig voor electrostatische ontladingen (ESD). Onzorgvuldig behandelen tijdens reparatie kan de levensduur drastisch doen verminderen. 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.

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 riparazioni occorre quindi essere collegato allo stesso potenziale che quello della massa dell’apparecchio 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.

Veiligheidsbepalingen vereisen, dat het apparaat bij reparatie in zijn oorspronkelijke toestand wordt teruggebracht en dat onderdelen, identiek aan de gespecificeerde, worden toegepast.

Les normes de sécurité exigent que l’appareil soit remis à l’état d’origine et que soient utiliséés les piéces de rechange identiques à celles spécifiées.

Bei jeder Reparatur sind die geltenden Sicherheitsvorschriften zu beachten. Der Original zustand des Geräts darf nicht verändert werden; für Reparaturen sind Original-Ersatzteile zu verwenden.

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

CLASS 1

LASER PRODUCT

Invisible laser radiation when open. Avoid direct exposure to beam.

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

Warning !

Varning !

3122 110 03420

Le norme di sicurezza esigono che l’apparecchio venga rimesso nelle condizioni originali e che siano utilizzati i pezzi di ricambio identici a quelli specificati.

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

Varoitus !

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

DK Advarse !

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

1-7

INFORMATION ABOUT LEAD-FREE SOLDERING

Philips CE is producing lead-free sets from 1.1.2005 onwards.

IDENTIFICATION:

Regardless of special logo (not always indicated) one must treat all sets from 1 Jan 2005 onwards, according next rules:

Example S/N:

Bottom line of typeplate gives a 14-digit S/N. Digit 5&6 is the year, digit 7&8 is the week number, so in this case 2005 wk12

So from 0501 onwards = from 1 Jan 2005 onwards

Important note

: In fact also products of year 2004 must be treated in this way as long as you avoid mixing solder-alloys (leaded/ lead-free). So best to always use SAC305 and the higher temperatures belong to this.

Due to lead-free technology some rules have to be respected by the workshop during a repair:

• Use only lead-free solder alloy Philips SAC305 with order code 0622 149 00106. If lead-free solder-paste is required, please contact

the manufacturer of your solder-equipment. In general use of solder-paste within workshops should be avoided because paste is not easy to store and to handle.

• Use only adequate solder tools applicable for lead-free solder alloy. The solder tool must be able

o To reach at least a solder-temperature of 400∞C, o To stabilize the adjusted temperature at the solder-tip o To exchange solder-tips for different applications.

• Adjust your solder tool so that a temperature around 360∞C

ñ 380∞C is reached and stabilized at the solder joint. Heating-time of the solder-joint should not exceed ~ 4 sec. Avoid temperatures above 400∞C otherwise wear-out of tips will rise drastically and flux-fluid will be destroyed. To avoid wear-out of tips switch off un-used equipment, or reduce heat.

• Mix of lead-free solder alloy / parts with leaded solder alloy / parts is possible but PHILIPS recommends strongly to avoid mixed

solder alloy types (leaded and lead-free). If one cannot avoid or does not know whether product is lead-free, clean carefully the solder-joint from old solder alloy and re-solder with new solder alloy (SAC305).

• Use only original spare-parts listed in the Service-Manuals. Not listed standard-material (commodities) has to be purchased at

external companies.

• Special information for BGA-ICs:

- always use the 12nc-recognizable soldering temperature profile of the specific BGA (for de-soldering always use the lead-free temperature profile, in case of doubt)

- lead free BGA-ICs will be delivered in so-called ëdry-packagingí (sealed pack including a silica gel pack) to protect the IC against moisture. After opening, dependent of MSL-level seen on indicator-label in the bag, the BGA-IC possibly still has to be baked dry. (MSL=Moisture Sensitivity Level). This will be communicated via AYS-website. Do not re-use BGAs at all.

• For sets produced before 1.1.2005 (except products of 2004), containing leaded solder-alloy and components, all needed spare-parts

will be available till the end of the service-period. For repair of such sets nothing changes.

• On our website www.atyourservice.ce.Philips.com

you find more information to:

☛

BGA-de-/soldering (+ baking instructions)

☛

Heating-profiles of BGAs and other ICs used in Philips-sets

You will find this and more technical information within the ìmagazineî, chapter ìworkshop newsî.

For additional questions please contact your local repair-helpdesk.

SERVICE INSTRUCTION

1. Unplug the AC Power cord and connect a wire between the two pins of the AC Power plug.

2. Set the AC Power switch to the "on" position (keep the AC Power cord unplugged!).

3. Measure the resistance value between the pins of the AC Power plug and the metal shielding of the tuner or the aerial connection on the set. The reading should be larger than 4.5 Mohm(For U.S. it should be between

4.2 Mohm and 12 Mohm.

4. Switch "off" the set, and remove the wire between the two pins of the AC Power plug.

Safety regulations require that after a repair, the set must be returned in its original condition. Pay in particular attention to the following points:

· Route the wire trees correctly and fix them with the mounted cable clamps.

· Check the insulation of the AC Power lead for external damage.

· Check the strain relief of the AC Power cord for proper function.

· Check the electrical DC resistance between the AC Power Plug and the secondary side (only for sets which have a AC Power isolated power supply):

· Check the cabinet for defects, to avoid touching of any inner parts by the customer.

PREPARATIONS AND CONTROLS

Preparations

Rear connections

The type plate is located at the rear of the

system.

A Power

– Before connecting the AC power cord to the

wall outlet, ensure that all other connections

have been made.

– If your system is equipped with a Voltage

Selector, set the VOLTAGE SELECTOR to the

local power line voltage.

Warning!

–For optimal performance, use only the

original power cable.

–Never make or change any connections

with the power switched on.

To avoid overheating of the system, a safety

circuit has been built in. Therefore, your

system may switch to Standby mode

automatically under extreme conditions. If

this happens, let the system cool down

before reusing it (not available for all versions).

B Antennas Connection

Connect the supplied MW loop antenna and FM

antenna to the respective terminals. Adjust the

position of the antenna for optimal reception.

MW Antenna

Fix the claw

0º

MW ANTENNA

Position the antenna as far as possible from a TV,

VCR or other radiation source.

SPEAKERS 6!&

ñ-

AM ANTENNA-

MW loop-

antenna

AUX/-

CDR-

AC-

MAINS

AC power cord

FM AERIAL-

75W

FM wire antenna

VOLTAGE

NOT FOR ALL-

VERSIONS

SELECTOR

110V-

127V

220V-

240V

Preparations

FM Antenna

For better FM stereo reception, connect an

outdoor FM antenna to the FM ANTENNA

terminal.

C Speakers Connection

Front Speakers

Connect the speaker wires to the SPEAKERS

terminals, right speaker to "R" and left speaker to

"L", coloured (marked) wire to "+" and black

(unmarked) wire to "–".

Fully insert the stripped portion of the speaker

wire into the terminal as shown.

Notes:

–For optimal sound performance, use the

supplied speakers.

– Do not connect more than one speaker to any

one pair of +/- speaker terminals.

– Do not connect speakers with an impedance

lower than the speakers supplied. Please refer to

the SPECIFICATIONS section of this manual.

Optional connection

The optional equipment and connecting cords

are not supplied. Refer to the operating

instructions of the connected equipment for

details.

Connecting a USB device or memory

card

By connecting a USB mass storage device

(including USB flash memory, USB flash players

or memory cards) to the Hi-Fi system, you can

enjoy the device's stored music through the

powerful speakers of Hi-Fi system.

Insert the USB device's USB plug into the

socket on the set.

for the devices with USB cables:

Insert one plug of the USB cable (not supplied)

to the

socket on the set.

Insert the other plug of the USB cable to the

USB output terminal of the USB device.

for the memory card:

Insert the memor y card into a card reader (not

supplied).

Use a USB cable (not supplied) to connect the

card reader into the

socket on the set.

Connecting a non-USB device

Use a cinch cable to connect AUX to the

analogue audio out terminals of an external

equipment (TV, VCR, Laser Disc player, DVD

player or CD Recorder).

Note:

– If you are connecting equipment with a mono

output (a single audio out terminal), connect it to

the AUX left terminal. Alternatively, you can use a

“single to double” cinch cable (the output sound

still remain mono).

Inserting batteries into the

remote control

Insert two batteries (Type R06 or AA) into the

remote control with the correct polarity as

indicated by the "+" and "-" symbols inside the

battery compar tment.

CAUTION!

– Remove batteries if they are exhausted

or will not be used for a long time.

– Do not use old and new or different

types of batteries in combination.

– Batteries contain chemical substances, so

they should be disposed of properly.

1-8

PREPARATIONS AND CONTROLS

Controls

Controls on the system and

remote control

STANDBY-ON/ ECO POWER (B)

– switches the system on or to Eco Power

standby/normal standby with clock display.

DISC 1/2/3 (CD 1/2/3)

– to select a disc tray for playback.

Source selection – to select the following :

CD/USB (on the system only)

– to switch between disc or USB source.

CD (on the remote only)

– to select disc source.

– press repeatedly to select a disc tray for

playback.

TUNER

– to select waveband : FM or AM.

TAPE (TAPE 1/2)

– to select tape deck 1 or 2.

AUX

– to select the input for an additional appliance :

AUX.

USB DIRECT (on the remote only)

– to select USB source directly.

Mode Selection

ALBUM-/+ 5 6

for MP3-CD/USB .. to select previous/next

album.

for CD ......................... to search backward/forward.

for Tuner ..................... to tune to a lower or higher

radio frequency.

for Tape ....................... to rewind or fast forward.

for Clock .................... (on the system only) to set

the hour.

STOP 9

for CD/ MP3-CD/USB to stop playback

or to clear a programme.

for Tuner ..................... (on the system only) to stop

programming.

for Tape ....................... to stop playback or

recording.

for Demo ................... (on the system only) to

activate/deactivate the

demonstration.

for Clock .................... (on the system only) to exit

clock setting.

for Plug & Play......... (on the system only) to exit

plug & play mode.

≈2 ;

for CD/ MP3-CD/USB to start or

interrupt playback.

for Tape ....................... to start playback.

for Plug & Play......... (on the system only) to initiate

and start plug & play mode.

TITLE-/+ w /∑ PRESET

for MP3-CD/USB . to select previous/next title.

for CD ........................ to skip to the beginning of

the current, previous, or next

track.

for Tuner .................... to select a preset radio

station.

for Clock ................... (on the system only) to set

the minute.

DSC

– selects different type of preset sound equaliser

settings. (OPTIMAL, JAZZ, ROCK or TECHNO)

VAC

– selects different type of ambience-based

equaliser settings. (HALL, CONCERT or

CINEMA)

DBB/INC. SURR (DBB/IS)

– to select the desired bass boost level. (DBB 1,

DBB 2, DBB 3 or DBB OFF)

– to activate or deactivate the surround sound

effect.

MAX SOUND (MAX)

– to activate or deactivate the optimal mix of

various sound features.

REPEAT

– to playback track(s)/disc(s)/programme

repeatedly.

SHUFFLE

–Turns on/off the random play mode.

)

(

•

™

1-9

PREPARATIONS AND CONTROLS

Controls

Notes for remote control:

– First, select the source you wish to control

by pressing one of the source select keys on

the remote control (CD or TUNER, for

example).

– Then select the desired function (

…

, for example).

DIM

– to select different brightness for the display

screen : DIM 1, DIM 2, DIM 3 or DIM OFF.

OPEN #

– to open the tape deck door.

PROGRAM

for CD/ MP3-CD/USB to programme disc

tracks.

for Tuner ..................... to programme preset radio

stations.

for Clock .................... to select 12- or 24-hour clock

mode.

– to connect headphones.

MASTER VOLUME (VOL -/+)

– to increase or decrease the volume.

IR SENSOR

– sensor for the infrared remote control.

RECORD (REC)

– to start recording on tape deck 1 or 2.

AUTO REPLAY (A. REPLAY)

– to select continuous playback in either AUTO

REPLAY or ONCE MODE only.

(

Disc tray

)

OPEN•CLOSE

– to open or close the disc tray.

DISC CHANGE

–to change disc(s).

™

Display screen

– to view the current status of the system.

SLEEP

– to activate/deactivate or set the sleep timer.

MUTE

–mutes or restores the volume.

∞

TIMER ON/OFF

– activates/deactivates the timer function.

DISPLAY

– to display the album and title name for MP3 disc.

≥

Tape deck 1

•

Tape deck 2

CLOCK•TIMER (CLK/ TIMER)

– to view the clock.

USB DIRECT

– jack for the external USB mass storage device.

≤

1-10

MAINTENANCE AND TROUBLESHOOTING

Maintenance

Cleaning the Cabinet

Use a soft cloth slightly moistened with a mild

detergent solution. Do not use a solution

containing alcohol, spirits, ammonia or abrasives.

Cleaning Discs

When a disc becomes dirty,

clean it with a cleaning cloth.

Wipe the disc from the centre

out. Do not wipe in circular

motion.

Do not use solvents such as

benzene, thinner, commercially available cleaners,

or antistatic spray intended for analogue records.

Cleaning the disc lens

After prolonged use, dirt or dust may

accumulate at the disc lens. To ensure good

playback quality, clean the disc lens with Philips

CD Lens Cleaner or any commercially available

cleaner. Follow the instructions supplied with

cleaner.

Cleaning the Heads and the Ta pe Paths

To ensure good recording and playback quality,

clean the heads

, the capstan(s)

, and

pressure roller(s)

after every 50 hours of

tape operation.

Use a cotton swab slightly moistened with

cleaning fluid or alcohol.

You also can clean the heads by playing a

cleaning tape once.

Demagnetising the heads

Use a demagnetising tape available at your

dealer.

WARNING

Under no circumstances should you try to repair the system yourself, as this will invalidate the

warranty. Do not open the system as there is a risk of electric shock.

If a fault occurs, first check the points listed below before taking the system for repair. If you

are unable to remedy a problem by following these hints, consult your dealer or Philips for

help.

“NO DISC” is displayed.

“DISC NOT FINALIZED” is displayed.

Some files on the USB device are not

displayed.

“DEVICE NOT SUPPORTED” scrolls on the

display.

Insert a disc.

Check if the disc is inserted upside down.

Wait until the moisture condensation at the lens

has cleared.

Replace or clean the disc, see “Maintenance”.

Use a finalized CD-RW or a correct MP3-CD

format disc.

Use a finalised CD-RW or CD-R.

Check if the number of folders exceeds 99 or

the number of titles exceeds 999.

Remove the USB mass storage device or select

another source..

Problem

Solution

Tr oubleshooting

Radio reception is poor.

Recording or playback cannot be made.

The tape deck door cannot open.

The system does not react when buttons

are pressed.

Sound cannot be heard or is of poor

quality.

The left and right sound outputs are

reversed.

The remote control does not function

properly.

The time is not working.

Not all lighted buttons are showing light.

The Clock/Timer setting is erased.

The system displays features

automatically and buttons start flashing.

If the signal is too weak, adjust the antenna or

connect an external antenna for better

reception.

Increase the distance between the Mini HiFi

System and your TV or VCR.

Clean deck parts, see “Maintenance”.

Use only NORMAL (IEC I) tape.

Apply a piece of adhesive tape over the missing

tab space.

Remove and reconnect the AC power plug and

switch on the system again.

Remove and reconnect the AC power plug and

switch on the system again.

Adjust the volume.

Disconnect the headphones.

Check that the speakers are connected

correctly.

Check if the stripped speaker wire is clamped.

Make sure the MP3-CD was recorded within

32-256 kbps bit rate with sampling frequencies

at 48 kHz, 44.1 kHz or 32 kHz.

Check the speaker connections and location.

Select the source (CD or TUNER, for example)

before pressing the function button ( 2 , w,

Reduce the distance between the remote

control and the system.

Insert the batteries with their polarities

(+/– signs) aligned as indicated.

Replace the batteries.

Point the remote control directly towards the IR

sensor.

Set the clock correctly.

Press and hold CLOCK•TIMER to switch on the

timer.

If recording or tape dubbing is in progress, stop

recording.

Press DIM to select DIM OFF display mode.

Power has been interrupted or the power cord

has been disconnected. Reset the clock/timer.

Press and hold 9 on the system to switch off

the demonstration.

1-11

2-1 2-1

DISMANTLING INSTRUCTIONS

Dismantling of the Cassette Cover

2. Twist screw driver

3. Lift up and out

1. Place screw driver (flat side) between the cassette cover & cassette door

Dismantling of the CDC Module and Front Panel

4) Remove the Cover Tray CDC as indicated.

5. Twist screw driver

6. Lift up and out

4. Place screw driver (flat side) between the cassette cover clasp & cassette door

Remove Cover Tray CDC

Remove Cassette Upper Cover

Dismantling of the CDC Module and Front Panel

1) Loosen 4 screws to remove the Cover Top of the set.

2) Loosen 2 screws to remove the Panel Left and 2 screws

to remove the Panel Right of the set.

3) Slide out the CDC Tray as shown in the diagram below with

the help of a flat head screw driver.

Remove Cassette Nether Cover

5) Loosen 2 screws A and 2 screws B to remove the CDC

Module as indicated.

6) Remove 2 screws at the bottom to separate the

Front Panel Assembly from the Plate Bottom .

Front View CDC

Sliding Out The CDC Tray

Remove CDC Module

2-2

Dismantling of Rear PortionDismantling of the Front Board

1) Remove 6 screws C and 7 screws D as indicated to loosen the Front

Board.

Remove 4 screws E as indicated to loosen the Front Board.

1) Remove 2 screws F as indicated to loosen the Speaker

Board.

2) Remove 1 screws J and uncatch M1 as indicated to

loosen the AF Board.

3) Remove 3 screws K and uncatch M2 as indicated to

loosen the Tuner Board.

4) Remove 4 screws L as indicated to loosen the Panel

Rear .

Remove Main Board

Dismantling of the ETF Tape Module

1) Remove 8 screws G as indicated to loosen the ETF Tape

Module.

Repair Hints

1) The Knob Volume can be remove pull it out in the direction

as indicated. See picture 1.

Picture 1

Repair Hints

2-3

3) During repair it is possible to disconnect the Tape board

and CDC Module completely unless the fault is sus-

pected to be in that area. This will not affect the

performance of the rest of the set.

Note: The flex cables are very fragile, care should be taken

not to damage them during repair. After repair, be

very sure that the flex cables are inserted properly

into the flex sockets before encasing, otherwise faults

may occurs.

Service pos C

Service pos A

Service pos B

Service pos D

SERVICE TEST PROGRAM

3-1

To star t service test program

& AUX

hold

depressed while

plugging in the mains cord

3-1

TUNER TEST

TUNER

Button pressed?

Display Tuner Version

"ccc"

copied to the RAM (see Table1)

PRESET

TUNER

Button pressed?

Service frequencies are

Tuner works nor mally

except:

PROGRAM button

Disconnect

Mains cord ?

Service Mode left

Europe

"EUR"

87.5MHz

108MHz

531kHz

1602kHz

558kHz

1494kHz

153kHz

279kHz

198kHz

98MHz

87.5MHz

East Eur. Extended-band

"EAS"

65.81MHz

108MHz

74MHz

87.5MHz

531kHz

1602kHz

558kHz

1494kHz

98MHz

70.01MHz

65.81MHz

Table 1

STANDBY-ON

Button pressed?

Set is in Service PLAY Mode.

In case of failures, error

codes according to table 2

will be displayed.

The Service Play Mode is intended to detect and identify the failures in the CD Mode.

In this mode the electronics will still function even when an error is detected so that repair activities can be carried out.

East Eur.

"EAS"

87.5MHz

108MHz

531kHz

1602kHz

1700kHz

558kHz

1494kHz

1500kHz

87.5MHz

98MHz

87.5MHz

USA

"USA"

108MHz

530kHz

560kHz

98MHz

SERVICE PLAY MODE

Oversea

"OSE"

87.5MHz

108MHz

530/531kHz*

1700/1602kHz*

560/558kHz*

1500/1494kHz*

98/87.5MHz*

87.5MHz

87.5/98MHz*

Note: * Depending on the selected grid frequency (9 or 10kHz)

By holding the TUNER and

buttons depressed while switching on the Mains supply, one

of the undermentioned features will be activated:

- the tuning grid frequency is toggled between 9kHz and 10kHz for the Oversea (/21) version.

- the extended FM1 (65.81MHz - 74MHz) is toggled on and off for East Eur. (/34) version.

Display shows the

OM version *

"S-Vyy"

(Main menu)

Error code

E1000

E1001

S refers to Service Mode.

V refers to Version.

yy refers to Software version number of µProcessor. (Counting up from 01 to 99)

Figure 1

Figure 2

Error Description

Focus Error Triggered when the focus could not be found within a certain time when starting up the CD or when the focus is lost for a certain time during play.

Radial Error Triggered when the radial servo is off-track for a certain time during play.

DISPLAY TEST

Button pressed?

Display shows all LEDs on

except ECO POWER.

(see Figure 1)

Button pressed?

Display shows

selected LEDs on

(see Figure 2)

Button pressed?

ADC TEST

Display shows "ADC1 Value"

Display shows "ADC2 Value"

Display shows "ADC3 Value"

AUX

Button pressed?

for ADC1

(Input Line - IoSA2)

AUX

Button pressed?

for ADC2

(Input Line - IoSA1)

AUX

Button pressed?

for ADC3

(Input Line - IoAmNTC)

Sledge In Error

E1002

The sledge did not reach its inner position (inner-switch is still close) before approximately 6 Sec. have passed by. Inner-switch or sledge motor problem.

Button pressed?

Sledge Out Error

E1003

E1005

E1006

E1007

E1008

E1020

E1070

E1071

E1079

The sledge did not come out of its inner position (inner-switch is still open) before approximately 250 mSec. have passed by. Inner-switch or sledge motor problem.

Jump-offtrack error Triggered in normal play when the jump destination could not be found within a certain time. When this error occurred, software will try to recover by initiating the jump command again. If it is recoverable, the disc will continue to play.

Subcode Error Triggered when a new subcode was missing for a certain time during play.

PLL Error The Phase Lock Loop could not lock within a certain time.

Turntable Motor Error Generated when the CD could not reached 75% of speed during startup within a certain time. Discmotor problem.

Focus Search Error The focus point has not been found within a certain time.

This happens when the carousel switch is defective and closed all the time, or when the carousel is blocked when it is located exactly at a disc position.

This happens when the carousel switch is defective and does not closed electrically, or when the carousel is blocked in between two disc positions. The time-out is approximately 5 Sec.

The drawer could not open or enter the inside position and is opening again. This happen when the drawer is blocked and cannot go fully inside or when the drawer switch is defective and does not close.

Table 2

ADC Test is used for checking the

TEST

ADC inputs to the microprocessor.

The display shows an ADC value between 0 and 255 for an input signal between 0 and 5V.

Activated with

ET M

ORPEE

ACTION

set A

p t

w nr

Various

other Tests

t "PASS" is displayed if the uProcessor read back the test pattern correctly, otherwise

to Exit

EEPROM FORMAT Load default data. Display shows "NEW"

"FAIL" will be displayed.

for 1 second.

Caution! All presets from the customer will be lost!!

ROTARY ENCODER TEST

LEAVE SERVICE TESTPROGRAM

Volume Knob

Jog Shuttle knob

Disconnect mains cord

Display shows value for 2 seconds. Values increases or decreases in steps of 1 until 0 (Min.) or 40 (Max.) is reached.

MORP

SET BLOCK DIAGRAM - FWM372

4-1

SET BLOCK DIAGRAM - FWM572

4-2

SET WIRING DIAGRAM - FWM372

5-1

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