Philips MCM233 Service Manual

Version 1.2
MCM233
3141 785 34892
Sleek micro music system
-/12/55/79/78/98
Published by LX 1042 Service Audio Subject to modification
©
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.
CONTENTS
Technical specification ..................................................................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 ..............................................................................3-2
Main board
Circuit diagram ..................................................................4-1..4-2
Layout diagram..................................................................4-3..4-4
Key board
Circuit diagram .........................................................................5-1
Layout diagram.........................................................................5-2
Exploded view diagram .................................................................8-1
Revision list....................................................................................9-1
LCD board
Circuit diagram .........................................................................6-1
Layout diagram.........................................................................6-2
Headphone board
Circuit diagram .........................................................................7-1
Layout diagram.........................................................................7-2

Philips MCM233 Specifications

General

Display type	LCD
ID3 Tag display	Yes
RMS rated power	20 W
Woofer diameter	76 mm
Number of speakers	2
Supported radio bands	FM
Preset stations quantity	20
Power	25 W
USB direct modes	Fast Backward, Fast Forward, Play/Pause, Previous/Next, Program Play, Repeat, Shuffle, Stop
Apple docking	No
Headphone connectivity	3.5 mm
Type	Home audio micro system
Product color	Black
Disc loading type	Front
Power source	AC
Input voltage	110-240 V
Input frequency	50 - 60 Hz
Playback modes	Fast backward, Fast forward, Next, Program, Repeat all, Repeat one, Shuffle
Disc types supported	CD, CD-R, CD-RW
Playback disc formats	CD audio
Audio formats supported	MP3, WMA
Volume control	Digital

Weight and Dimensions

Depth	103.5 mm
Width	565 mm
Height	245 mm
Package depth	165 mm
Package width	620 mm
Package height	250 mm
Package weight	5500 g

Summary

Technical Specification

Measurement Setup

Tuner FM Measurement Setup

Setup for measuring FM tuner performance using RF generator and filters.

Tuner AM (MW,LW) Measurement Setup

Setup for measuring AM tuner performance in a Faraday's cage.

CD Measurement Setup

Setup for measuring CD playback quality using signal discs.

Recorder Measurement Setup

Setup for measuring recorder performance with test cassettes.

Service Aids and Instructions

Lead-Free Soldering Information

Guidelines for handling lead-free soldering and identifying related sets.

Post-Repair Service Instructions

Procedures and checks required after completing a repair.

CD Playability Troubleshooting

Playability Check Procedure

Steps to diagnose CD playback issues using specific test tracks.

Customer Information for No-Fault Found

Guidance for informing customers when no fault is detected.

Liquid Lens Cleaning Method

Method for safely cleaning the CD player lens using special solvent.

System Block Diagram

System Wiring Diagram

Main Board Circuit Diagram

Main Board Circuit Diagram Part 1

Schematic for the main board, covering initial sections.

Main Board Circuit Diagram Part 2

Schematic for the main board, covering subsequent sections.

Main Board Layout Diagrams

Main Board Layout Component Side View

Component placement layout for the main board's component side.

Main Board Layout Copper Side View

PCB layout for the main board's copper (solder) side.

Key Board Diagrams

Key Board Circuit Diagram

Schematic for the key board, detailing button and LED connections.

Key Board Layout Diagram

Component placement and routing layout for the key board.

LCD Board Diagrams

LCD Board Circuit Diagram

Schematic for the LCD board, showing display driver and connections.

LCD Board Layout Diagram

Component placement and routing layout for the LCD board.

Headphone Board Diagrams

Headphone Board Circuit Diagram

Schematic for the headphone board, detailing the amplifier IC and connections.

Headphone Board Layout Diagram

Component placement and routing layout for the headphone board.

Exploded View Diagram

Revision List