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CO'MPUTER
ENCLOSURE
& MOTHERBOARDS
TECHNICAL MANUAL
A205 $20.00
WARNING
Your CompuPro Computer Enclosure is a Class A commercial digital device. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions manual, may cause interference to radio communications. It has
been tested and found to comply with the limits for a Class A computing device pursuant to Subpart
J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such
interference when operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference in which case the user at his own expense will be
required to take whatever measures may be required to correct the interference.
WE STRONGLY RECOMMEND THAT YOU INSTALL SHIELDED EXTERNAL RS-232
CABLES WITH THIS SYSTEM TO REDUCE RADIO FREQUENCY INTERFERENCE (RFI).
DO NOT OPERATE THIS EQUIPMENT WITH THE COVER REMOVED.
COMPUTER ENCLOSURE AND MOTHERBOARDS TECHNICAL MANUAL
Copyright 1981 CompuPro
Hayward, CA 94545
File Name: SYSENC.MAN
Document # 1171 0
First edition: July 1981
Latest Printing: November 1984
DISCLAIMER - CompuPro makes no representations or warranties with respect to the contents
hereof and specifically disclaims any Implied warranties of merchantability or fitness for any
particular purpose. Further. CompuPro reserves the right to revise this publication and to make
any changes from time to time in the content hereof without obligation of CompuPro to notify any
person of such revision or changes.
All rights reserved. No part of this publication may be reproduced or transmitted in any form, or
by any means. without the written permission of CompuPro. Printed and assembled in the United
States of America.
Enclosed front panel design shown on cover is available from Full Service CompuPro System
Centers only.
CONTENTS
COMPUTER ENCLOSURE' ........................................................................ .
Before configuring your system ................................................................... 1
AC power distribution ........... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2
Power supply schematic .......................................................................... 2
MOTHERBOARDS (6, 12, & 21 SLOT) ............................................................. 3
Termination circuitry ............................................................................... 3
Motherboard schematic ........................................................................... 4
Active termination theory .......................................................................... 4
COMPUTER ENCLOSURE
The CompuPro System Enclosure is one of the most versatile and reliable microcomputer
enclosures on the market today. It provides a home for your computer now, and plenty of room
to expand your system if your needs change. The enclosure is available either as rack mount for
a standard 19" rack, or as a desk top model.
Major features include: