Philips FWM-998 Service Manual

Mini Hi-Fi System

FWM998

-/55/BK

CONTENTS

Technical specification ..................................................................1-2

Version variation ...........................................................................1-2

Service measurement setup..........................................................1-3

Service aids .................................................................................1-4

Instructions on CD playability ................................................2-1..2-2

Block diagram ................................................................................3-1

Wiring diagram ..............................................................................4-1

Disassembly diagram............ ................................................5-1..5-2

Main board

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

Layout diagram ..................................................................6-2..6-3

Display board

Circuit diagram ..................................................................7-1..7-2

Layout diagram ..................................................................7-3..7-4

USB/SD board

Circuit diagram .........................................................................8-1

Layout diagram .........................................................................8-2

AMP Board

Circuit diagram. .................................................................

Layout diagram ..................................................................

CD board

Circuit diagram .......................................................................10-1

Layout diagram ..............................................................10-2..10-3

MCU Board

Circuit diagram. ......................................................................

Layout diagram ..............................................................

Exploded view diagram ...............................................................12-1

9-1..9-2 9-3..9-4

11-1

11-2..11-3

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 LX 1030 Service Audio Subject to modification

Version 1.0

3141 785 35430

Sound

• Output Power: 14000W PMPO

• Total Sound Power (RMS): 1300 W

• Sound Enhancement: MAX Sound, Dynamic Bass Bo

ost 3 steps, Incredible Surround, Digital Sound

Control 4 modes, Virtual Ambience Control

Loudspeakers

• Main Speaker: Bass Reflex Speaker System, 2 way, 2" tweeter

• Subwoofer type: Passive

• Subwoofer driver: 10" woofer

• Number of Loudspeakers: 6

Audio Playback

• Loader Type: 3 CD Carousel

• Number of Discs: 3

• Playback Media: CD, CD-R, CD-RW, MP3-CD, WMA-CD,

SD Card, USB flash drive

• Disc Playback Modes: 40-Track Programmable, Rep

eat/one/disk/program, Shuffle Play

• USB Direct / SD Modes: Fast Backward/Fast Forward

, Play/Pause, Previous/Next, Repeat,

Shuffle

Audio Recording

• Recording Media: USB device, SD/MMC card

• USB recording sources: CD, Tuner, Aux, Mic

rophone in, SD Card

• SD card recording sources: Aux, CD, Microphone in, T

uner, USB device

• USB / SD card recording modes: Delete, Instant record

, Progammed tracks, Schedule radio

program, Single disc, Single track

Tuner/Reception/Transmission

• Auto digital tuning

• Station presets: 40

• Tuner Bands: FM, MW

• Tuner Enhancements: Auto Store, Easy Set (Plug &

Play)

Connectivity

• Audio Connections: RCA Aux in, 3.5mm stereo line in -MP3 link

• USB: USB host

• Microphone: Dual Microphone sockets

• Other connections: FM Antenna, MW Antenna

Convenience

• Alarms: CD Alarm, Radio Alarm, USB alarm, Sleep timer

• Clock: On main display

• Display Type: FTD

• Karaoke: MIC volume, Echo control

Accessories

• Remote control: 36-key with 2xAAA batteries

• User Manual: Spanish, B-Portuguese

• Guarantee booklet: Global version

• Included accessories: FM/MW Antenna, Batteries for re

mote control, *Flat pin adaptor

• Quick start guide: Spanish, B-Portuguese

• Cables: MP3 Line in cable

Dimensions

• Set dimensions (W x H x D): 265 x 359 x 353 mm

• Main speaker dimensions (W x H x D): 26

3 x 447 x 360 mm

• Subwoofer dimensions (W x H x D): 33

7 x 491 x 360 mm

• Surround Speaker dimensions (W x H x D): 20

8 x 359 x 301 mm

• Weight incl. Packaging: 51.57 kg

• Packaging dimensions (W x H x D): 10

x 562 x 786 mm

Power

• Power supply: 100-240VAC, 50/60Hz

•

TECHNICAL SPECIFICATION

Type /Versions:

Features

Board in used:

FWM998

Service policy

MAIN BOARD

* TIPS : C -- Component Lever Repair.

M -- Module Lever Repair

-- Used

/55 /00

89/39/KB/

Feature diffrence

RDS VOLTAGE SELECTOR ECO STANDBY - DARK

Type /Versions:

FWM998

/55 /00

/77

89/39/KB/

VERSION VARIATION

AMP BOARD

49/

C/M C/M

C/M

C C/M

C/M

C/M C/M C/M C/M

49/

DISPLAY BOARD CD BOARD MCU BOARD

USB BOARD

SD BOARD

C/M

1 - 2

MEASUREMENT SETUP

Tuner FM

1-3

Bandpass

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

DUT

250Hz-15kHz

e.g. 7122 707 48001

Ri=50:

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=50:

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

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 met

e.g. Sound Technology ST170

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

SERVICE AIDS

1-4

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.

WARNING

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

ESD

CLASS 1

LASER PRODUCT

Lead free

INSTRUCTIONS ON CD PLAYABILITY

Customer complaint

"CD related problem"

Set remains closed!

check playability

2 - 1

playability

ok ?

Play a CD

for at least 10 minutes

check playability

playability

ok ?

"fast" lens cleaning

check playability

playability

ok ?

For flap loaders (= access to CD drive possible) cleaning method

4 is recommended

add Info for customer

"SET OK"

return set

1 - 4 For description - see following pages

Exchange CDM

INSTRUCTIONS ON CD PLAYABILITY

2 - 2

PLAYABILITY CHECK

For sets which are compatible with CD-RW discs

use CD-RW Printed Audio Disc....................7104 099 96611

TR 3 (Fingerprint) TR 8 (600µ Black dot) maximum at 01:00

• playback of these two tracks without audible disturbance playing time for: Fingerprint

Black dot from 00:50 to 01:10

• jump forward/backward (search) within a reasonable time

For all other sets

use CD-DA SBC 444A..................................4822 397 30245

TR 14 (600µ Black dot) maximum at 01:15 TR 19 (Fingerprint) TR 10 (1000µ wedge)

• playback of all these tracks without audible disturbance playing time for: 1000µ wedge 10seconds

Fingerprint 10seconds Black dot from 01:05 to 01:25

• jump forward/backward (search) within a reasonable time

10seconds

LIQUID LENS CLEANING

Before touching the lens it is advised to clean the surface of the lens by blowing clean air over it. This to avoid that little particles make scratches on the lens.

Because the material of the lens is synthetic and coated with a special anti-reflectivity layer, cleaning must be done with a non-aggressive cleaning fluid. It is advised to use “Cleaning Solvent

The actuator is a very precise mechanical component and may not be damaged in order to guarantee its full function. Clean the lens gently (don’t press too hard) with a soft and clean cotton bud moistened with the special lens cleaner.

The direction of cleaning must be in the way as indicated in the picture below.

CUSTOMER INFORMATION

It is proposed to add an addendum sheet to the set which informs the customer that the set has been checked carefully - but no fault was found. The problem was obviously caused by a scratched, dirty or copy-protected CD. In case problems remain, the customer is requested to contact the workshop directly. The lens cleaning (method 3) should be mentioned in the addendum sheet.

The final wording in national language as well as the printing is under responsibility of the Regional Service Organizations.

BLOCK DIAGRAM

3-1

TUENR

PACK

8M SERIAL

FALSH

SST29VF080B

16M SDRAM

USB/SD

IIC

VFD

PT6315&

KEY PART

MLC3895

144pin QFP

3CDC DRIVER IC TDA7073A

CONTROL DATA

MOTOR DRIVER

BA5826

CD SERVO

BU9543

CD PCM

BCK,LRCK,

DATE

3CD LOADER

PICK UP

MOTOR

CD L/R

SENSOR

RC5/RC6 CODE

AUX

MICRO PHONE

PCM

BCK,LRCK

,DATE

INPUT

MUX

74LVC157

TUNER L/R

IIC

INPUT

PCM

ADC

WM8782

MUL-L/R

FUNCTION IC

TDA7468D

MAIN L/R

SUB/L

TDA8954

SUB/R

2*250W

TDA8954

2*150W

TDA8954

2*250W

WIRING DIAGRAM

4-1 4-1

VFD BOARD

VOLUME CONTROL BOARD

SOUND KEY CONTROL BOARD

MCU BOARD

KEY CONTROL BOARD

POWER CONNECT

CD BOARD

MOTOR BOARD

POWER SUPPLY

CLOSE/OPEN-MOTOR BOARD

MAIN BOARD

AMP BOARD

5-1 5-1

DISASSEMBLY INSTRUCTIONS

Dismantling of Rear Portion

1)Remove 9 screws A and 14 screws B/C as indicated to loosen the outer plate.

2)Remove 3 screws D as indicated to loosen the Rear portion .

Dismantling of the CDC Module

1)Slide out the CDC Tray as shown in the diagram below with the help of a flat head screw driver.

2)Remove the Cover Tray CDC as indicated.

3)Loosen 2 screws E and 2 screws F to remove the CDC Module as indicated.

Rear Portion

Sliding Out The CDC Tray

Remove Cover Tray CDC

+ 20 hidden pages