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Mini Hi-Fi System
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
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
©
Copyright 2010 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.
Published by LX 1030 Service Audio
Version 1.0
Subject to modification
Circuit diagram. .................................................................9-1..9-2
Layout diagram ..................................................................9-3..9-4
Circuit diagram .......................................................................10-1
Layout diagram ..............................................................10-2..10-3
Circuit diagram. ...................................................................... 11-1
Layout diagram .............................................................. 11-2..11-3
Exploded view diagram ...............................................................12-1
FWM998
-/55/BK
3141 785 35430
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Summary of Contents for Philips FWM998
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Page 1: Table Of Contents
Layout diagram .................8-2 © Copyright 2010 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. -
Page 2: Technical Specification
• Station presets: 40 • Tuner Bands: FM, MW • Power supply: 100-240VAC, 50/60Hz • Tuner Enhancements: Auto Store, Easy Set (Plug & • VERSION VARIATION Type /Versions: FWM998 Service policy Board in used: USB BOARD MAIN BOARD AMP BOARD DISPLAY BOARD... - Page 3 MEASUREMENT SETUP Tuner FM Bandpass LF Voltmeter 250Hz-15kHz e.g. PM2534 e.g. 7122 707 48001 RF Generator e.g. PM5326 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) Bandpass LF Voltmeter...
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Page 4: Service Aids
SERVICE AIDS 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. -
Page 5: Instructions On Cd Playability
2 - 1 INSTRUCTIONS ON CD PLAYABILITY Customer complaint "CD related problem" Set remains closed! check playability playability ok ? For flap loaders (= access to CD drive possible) "fast" lens cleaning cleaning method is recommended check playability playability ok ? Play a CD for at least 10 minutes check playability... - Page 6 2 - 2 INSTRUCTIONS ON CD PLAYABILITY PLAYABILITY CHECK LIQUID LENS CLEANING Before touching the lens it is advised to clean the surface of the lens by blowing clean air over it. For sets which are compatible with CD-RW discs This to avoid that little particles make scratches on use CD-RW Printed Audio Disc ....7104 099 96611 the lens.
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Page 7: Block Diagram
BLOCK DIAGRAM TUENR PT6315& PACK KEY PART 3CD LOADER 3CDC MOTOR DRIVER DRIVER IC BA5826 TDA7073A PICK UP 8M SERIAL MOTOR CONTROL DATA FALSH SST29VF080B CD SERVO BU9543 MLC3895 16M SDRAM 144pin QFP CD PCM BCK,LRCK, DATE USB/SD 74LVC157 WM8782 BCK,LRCK SUB/L ,DATE... -
Page 8: Wiring Diagram
WIRING DIAGRAM VFD BOARD VOLUME CONTROL BOARD SOUND KEY CONTROL BOARD MCU BOARD KEY CONTROL BOARD CD BOARD MOTOR BOARD CLOSE/OPEN-MOTOR BOARD MAIN BOARD AMP BOARD... - Page 11 CIRCUIT DIAGRAM - MAIN BOARD...
- Page 12 PCB LAYOUT - MAIN BOARD TOP SIDE...
- Page 13 PCB LAYOUT - MAIN BOARD BOTTOM SIDE...
- Page 14 CIRCUIT DIAGRAM - DISPLAY BOARD PART1...
- Page 15 CIRCUIT DIAGRAM - DISPLAY BOARD PART2...
- Page 16 PCB LAYOUT - DISPLAY BOARD TOP SIDE...
- Page 17 PCB LAYOUT - DISPLAY BOARD BOTTOM SIDE...
- Page 18 CIRCUIT DIAGRAM - USB/SD BOARD...
- Page 19 PCB LAYOUT - USB BOARD PCB LAYOUT - SD BOARD...
- Page 20 CIRCUIT DIAGRAM - AMP BOARD TO MAIN PB TO SMPS PB SUB-ON/OFF-CTL DCOFFSET-CTL CON1 -12V Noise Noise R183 AMP-ON DIC-CLK R171 R208 C236 +40V +12V R207 C242 47UF/100V R181 U8-B R209 C238 R169 U8-A SPK14 AGND Frequency Response 5.6K 470N D4558 100N -40V...
- Page 21 PCB LAYOUT - AMP BOARD TOP SIDE...
- Page 22 PCB LAYOUT - AMP BOARD BOTTOM SIDE...
- Page 23 10-1 10-1 CIRCUIT DIAGRAM-CD BOARD...
- Page 24 10-2 10-2 LAYOUT DIAGRAM-CD BOARD TOP SIDE...
- Page 25 10-3 10-3 LAYOUT DIAGRAM-CD BOARD BOTTOM SIDE...
- Page 26 11-1 11-1 CIRCUIT DIAGRAM - MCU BOARD...
- Page 27 11-2 11-2 PCB LAYOUT - MCU BOARD TOP SIDE...
- Page 28 11-3 11-3 PCB LAYOUT - MCU BOARD BOTTOM SIDE...
- Page 29 12-1 12-1 EXPLODED VIEW...