MCM720_3141-785-31000.pdf

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MP3 Micro System

MCM720

all versions

TABLE OF CONTENTS

Handling chip components ........................................................... 1-1

Leadfree and safety information ................................................... 1-2

Panel Board

circuit diagram. ......................................................................... 9-1

layout diagram.......................................................................... 9-2

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

Service tools ................................................................................. 2-1

Service measurement setup ......................................................... 2-2

Cassette Board

circuit diagram ........................................................................ 10-1

layout diagram ....................................................................... 10-2

Connections and controls...................................................... 3-1...3-3

Dismantling instructions ....................................................... 4-1...4-3

Tuner Board

circuit diagram. ........................................................................11-1

layout diagram.........................................................................11-2

Block diagram................................................................................ 5-1

Wiring diagram ............................................................................. 6-1

Rectifier Board

circuit diagram. ....................................................................... 12-1

layout diagram........................................................................ 12-2

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

Exploded view diagram ............................................................... 13-1

Mechanical partslist..................................................................... 13-2

Electrical partslist .............................................................. 14-1...14-7

© Copyright 2006 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 0620 Service Audio Subject to modification

© 3141 785 31000

Version 1.0

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1 - 1

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1 - 2

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2 - 1

TECHNICAL SPECIFICATIONS

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2 - 2

SERVICE MEASUREMENT

Tuner FW

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

DUT

LF Voltmeter

e.g. PM2534

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)

DUT

Bandpass

250Hz-15kHz

e.g. 7122 707 48001

LF Voltmeter

e.g. PM2534

RF Generator

e.g. PM5326

S/N and distortion meter

e.g. Sound Technology ST1700B

Frame aerial

e.g. 7122 707 89001

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)

Use Universal Test Cassette Fe SBC420 4822 397 30071

DUT

LF Generator

e.g. PM5110

DUT

L

L

R

R

S/N and distortion meter

e.g. Sound Technology ST1700B

S/N and distortion meter

e.g. Sound Technology ST1700B

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

LEVEL METER

e.g. Sennheiser UPM550

with FF-filter

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