Philips MCM726 Building instructions

Version 1.0
MCM726
©3141 785 31790
MP3 Micro Hi-Fi System all versions
Published by LX 0717 Service Audio Subject to modification
© 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.
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
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
TABLE OF CONTENTS

1 - 1

1 - 2

2 - 1
TECHNICAL SPECIFICATIONS

2 - 2
S
ERVICE MEASUREMENT
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
DUT
RF Generator
e.g. PM5326
S/N and distortion meter
e.g. Sound Technology ST1700B
Tuner FW
Use a bandpass filter to eliminate hum (50Hz, 100Hz) and disturbance from the pilottone (19kHz, 38kHz).
Ri=50
‰
Bandpass
250Hz-15kHz
e.g. 7122 707 48001
LF Voltmeter
e.g. PM2534
DUT
S/N and distortion meter
e.g. Sound Technology ST1700B
Frame aerial
e.g. 7122 707 89001
Tuner AM (MW,LW)
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).
RF Generator
e.g. PM5326
Ri=50
‰
L
R
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion meter
e.g. Sound Technology ST1700B
DUT
CD RECORDER
Use Audio Signal Disc SBC429 4822 397 30184
(replaces test disc 3) Use Universal Test Cassette Fe SBC420 4822 397 30071
L
R
LEVEL METER
e.g. Sennheiser UPM550
with FF-filter
S/N and distortion mete
r
e.g. Sound Technology ST1700
B
DUT
LF Generator
e.g. PM5110
Ri=50
‰

3 - 1
CONNECTION AND CONTROLS

3 - 2
CONNECTION AND CONTROLS

5 - 1 5 - 1
SET BLOCK DIAGRAM

6 - 1 6 - 1
SET WIRING DIAGRAM

7 - 17 - 1
CIRCUIT DIAGRAM - MAIN BOARD
PART 1

7 - 2 7 - 2
CIRCUIT DIAGRAM - MAIN BOARD
PART 2

7 - 37 - 3
LAYOUT DIAGRAM - MAIN BOARD
COMPONENT SIDE

7 - 4
7 - 4
LAYOUT DIAGRAM - MAIN BOARD
COPPER SIDE

8 - 1 8 - 1
CIRCUIT DIAGRAM - C MUSIC BOARD
PART 1

8 - 2
8 - 2
CIRCUIT DIAGRAM - C MUSIC BOARD
PART 2

LAYOUT DIAGRAM - C MUSIC BOARD
COMPONENT SIDE
8 - 3 8 - 3

LAYOUT DIAGRAM - C MUSIC BOARD
COPPER SIDE
8 - 4 8 - 4

9 - 1
CIRCUIT DIAGARM - VFD BOARD
9 - 1

LAYOUT DIAGARM - VFD BOARD
9 - 2 9 - 2

10 - 1 10 - 1
CIRCUIT DIAGRAM - CASSETTE BOARD