Service manual

First Edition, 1990
Second Edition, May 1991
FCC NOTICE: The equipment described in this manual generates, uses, and may emit
radio frequency energy. The equipment has been type 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 radio frequency
interference when operated in a commercial environment. Operation of this equipment in
a residential area may cause interference, in which case the user at his own expense may
be required to take measures to correct the interference.
The following are trademarks of Digital Equipment Corporation: DEC, DEC/CMS, DEC
/MMS, DECnet, DECstation 5000, DECsystem-10, DECsystem-20, DECUS, DECwriter,
DIBOL, EDUSYSTEM, IAS, IVIS, MASSBUS, VAX, VAXcluster, PDP, RSTS, RX, ThinWire,
TK50, ULTRIX, ULTRIX-32, UNIBUS, VMS, VR160, VT, and the digital logo.
UNIX is a registered trademark of American Telephone & Telegraph Company.
Velcro is a trademark of Velcro USA, Inc.
This document was prepared and published by Educational Services Development and
Publishing, Digital Equipment Corporation.