![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bg1.png)
MP3 Micro Hi-Fi System
MCM726
all versions
TABLE OF CONTENTS
Handling chip components ........................................................... 1-1
Leadfree and safety information ................................................... 1-2
Technical specification .................................................................. 2-1
Service tools ................................................................................. 2-1
Service measurement setup ......................................................... 2-2
Connections and controls...................................................... 3-1...3-2
Dismantling instructions ....................................................... 4-1...4-3
Block diagram................................................................................ 5-1
Wiring diagram ............................................................................. 6-1
Main Board
circuit diagram .................................................................. 7-1...7-2
layout diagram ..................................................................7-3...7-4
C Music Board
circuit diagram .................................................................. 8-1...8-2
layout diagram ..................................................................8-3...8-4
©
Copyright 2007 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.
VFD Board
circuit diagram. ......................................................................... 9-1
layout diagram .......................................................................... 9-2
Cassette Board
circuit diagram ........................................................................ 10-1
layout diagram ....................................................................... 10-2
Tuner Board
circuit diagram. ........................................................................11-1
layout diagram .........................................................................11-2
Rectifier Board
circuit diagram. ....................................................................... 12-1
layout diagram ........................................................................ 12-2
Exploded view diagram ............................................................... 13-1
Mechanical partslist ..................................................................... 13-2
Electrical partslist ..............................................................14-1...14-5
Supplier Bomlist
Published by LX 0717 Service Audio Subject to modification
Version 1.0
© 3141 785 31790
![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bg5.png)
ERVICE MEASUREMENT
2 - 2
Tuner FW
RF Generator
e.g. PM5326
DUT
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
‰
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 250kHz) to eliminate hum (50Hz, 100Hz).
CD RECORDER
Use Audio Signal Disc SBC429 4822 397 30184
(replaces test disc 3)
DUT
L
R
S/N and distortion meter
e.g. Sound Technology ST1700B
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
Use Universal Test Cassette Fe SBC420 4822 397 30071
LF Generator
e.g. PM5110
DUT
‰
Ri=50
L
R
S/N and distortion mete
e.g. Sound Technology ST1700
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bga.png)
CIRCUIT DIAGRAM - MAIN BOARD
PART 1
7 - 17 - 1
![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bgb.png)
CIRCUIT DIAGRAM - MAIN BOARD
PART 2
7 - 2 7 - 2
![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bgc.png)
LAYOUT DIAGRAM - MAIN BOARD
COMPONENT SIDE
7 - 37 - 3
![](/html/97/975c/975cf3cd4c5a72e6c42594d1427f31c8c35037eee26f7301280b5f1dc87a203c/bgd.png)
LAYOUT DIAGRAM - MAIN BOARD
COPPER SIDE
7 - 4
7 - 4