Specifications

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If necessary, the user should consult an Authorized COMPAQ Computer Dealer or
any experienced radio/television technician for additional suggestions.
Compaq Computer Corporation requires that all peripheral devices be connected
to this computer via shielded cables with metal RFI/EMI connector hoods.
Wire Type: Multipaired overall shielded; Belden #98xx; Alpha #54xx; or
equivalent.
Connector Hood: RFI/EMI metal shield; AMP #745l7x-x; or equivalent.
It is important that the chassis ground of any peripheral device be connected
to the computer chassis. An Alpha #1221 flat braided strap is sufficient.
This strap is not necessary if the shielded cable connects the two chassis.
Preface
The Maintenance and Service Guide is a troubleshooting, maintenance, and
repair guide that can be used as a reference when servicing the COMPAQ
Portable Computer, the COMPAQ PLUS Personal Computer, and the COMPAQ
PORTABLE 286 Personal Computer.
All troubleshooting and repair procedures are detailed to allow subassembly/
module level repair only.
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CAUTION
Because of the complexity of the individual boards and subassemblies, Compaq
Computer Corporation strongly recommends that you do not attempt to make field
repairs at the component level. Indications of this may void any warranty or
exchange allowances.
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Summary of Text
The Maintenance and Service Guide contains the following eight chapters.
Chapter 1 "Operating and Performance Specifications" provides operating and
performance specifications for the COMPAQ Portable, the COMPAQ
PLUS, and the COMPAQ PORTABLE 286 Personal Computers.
Chapter 2 "Power On Self Test (POST)/Problem Isolation" describes the
internal system diagnostics programs that are automatically
executed when you turn on the system. A flowchart is provided for
quick reference for identifying and correcting problems that may
occur during the Power On Self Test procedure.
Chapter 3 "SETUP" describes how to configure the system and defines the
system prompts.