Chapter 9. Diagnostics; Diagnostics Theory; Resident Diagnostics Description - IBM 6360 Product Support Manual

CHAPTER 9. DIAGNOSTICS
DIAGNOSTICS THEORY
Note: The display formats and the
printed outputs are controlled by the
software and may differ in appearance
from the examples used in this book.
The diagnostics support for the IBM
Displaywriter System includes tests
and utilities that are built into the
system (resident) or can be loaded
through the diskette unit. The diag-
nostic support package includes
resident diagnostics, loadable diag-
nostics, maintenance analysis
procedures (MAPS), and customer loaded
diagnostics.
The resident diagnostics are located
in the system and have tests and util-
it ies us ed by both the cus tomer and
the customer service representative.
A part of these diagnostics operate
when the system is powered on and
include a Power On Reset (POR) , and
Basic Assurance Test (BAT).
The other part of these diagnostics
supply additional tests and utilities
used for special testing (for example,
when the diskette unit is not opera-
tional and the diagnostic diskette can
not be loaded). These tests and util-
ities are described in the Resident
Diagnostic Description Section.
Loadable diagnostics are tests and
utilities on the diagnostic diskette
(CEDD) and are loaded into the system
from the diskette unit. The automated
operation of these diagnostics speeds
repair actions. These diagnostics are
in three areas.
•
The MAP Diagnostic Intergration
(MDI) procedures are used to diag-
nos e f ai lures not s ens ed by the
resident diagnostics.
•
•
The Utilities give service person-
nel the ability to perform' addi-
tional diagnostic functions.
The System Exerciser is a diagnos-
tic program that thoroughly tests
the system.
The tests and utilities are described
in the Loadable Diagnostics section.
The Maintenance Analysis Procedures
(MAPs) are printed procedures that are
used in the intitial stage of problem
determination. The Start of Call MAP
is used to enter either the System
Entry MAP or an area MAP when problems
prevent the use of MDls.
The Customer Loadable Diagnostics are
tests and utilities on the Problem
Determination Diskette (PDD) and are
loaded into the system from the
diskette unit. The operation of these
tests is automatic to assist the cus-
tomer in problem determination.
These tests are customer tests used to
diagnose system· hardware failures and
are described in the Customer Loadable
Diagnostic Description Section.
RESIDENT DIAGNOSTICS
DESCRIPTION
The resident diagnostics are in the
system in read only storage (ROS) and
include a Power On Reset (POR) , Basic
Assurance Test (BAT), and Resident
Non-Automatic Diagnostics (RNA). The
BAT sequence supplies diagnostic sup-
port during the power on of .the
system. The Resident Non-Automatic
Diagnostics (RNA) are additional tests
that do not run during POR and BAT.
When a failure prevents access to the
diskette, but requires more diagnosis
Chapter 9. Diagnostics 9-1