PRODUCT FAMILY DORIS1 – PB1
Technical specification ......................................................1-1
Feature overview...............................................................1-1
Connections and controls..................................................1-2
Accessories .......................................................................1-3
Safety & Warnings.............................................................1-4
Service hints
Repair positions ............................................................2-1
Dismantling CD-door.....................................................2-1
CD-drive cleaning & lubrication.....................................2-2
CD-drive lens cleaning..................................................2-2
Handling chip components............................................2-3
Service tools..................................................................2-3
Pin description of ICs ................................................3-1...3-3
Start-up procedure.............................................................3-4
Blockdiagram.....................................................................3-5
Circuit diagrams
Part1 (supply, control and servo part)...........................4-1
Part2 (signal processing and audio part) ......................4-2
Printed circuit board
Componentside view.....................................................4-3
Copperside view............................................................4-4
Exploded view ...................................................................5-1
Mechanical partslist...........................................................5-1
Electrical partslist ......................................................6-1...6-2
CS 46 638
© 3103 785 25000
Published by PW 9951 Service Audio Printed in The Netherlands Subject to modification
Portable compact disc player
AZ7900
AZ7901
all versions
TABLE OF CONTENTS
©
Copyright 1999 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.
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