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Maintenance
4-2. REPAIR PHILOSOPHY
Field repair of the INP PCA is limited to the replacement of
the
Random
Access Memory (RAM) chips.
Any other malfunction must be
remedied on an exchange basis.
To exchange the INP
PCA,
remove
it
from
the
system
and
prepare it for reshipment to Hewlett-
Packard in accordance with the instructions
in
paragraph
4-19.
When
troubleshooting procedures have verified a RAM malfunction,
remove the INP PCA from the system and replace the defective
RAM
chip as described in paragraph 4-17.
4-3.
MAINTENANCE AIDS
The INP consists of more than just the apparent hardware.
It
is
actually
a
sophisticated
system of both hardware and software.
To support such a system, a support package has been provided for
verification and troubleshooting.
This support package
consists
of the following:
•
INP Self Test
•
Diagnostic/Support Monitor
•
CS/Trace
•
INP Dump
The INP hardware self test can be
manually
implemented
by
the
customer
user
or
by the HP Customer Engineer.
Light-emitting-
diode (LED) indicators give status information which can be
used
as
an
initial
verification/troubleshooting procedure.
The INP
self test is described further in paragraph 4-4.
The Diagnostic/Support Monitor (DSM)
is
available
for
on-line
diagnostic
support
purposes.
(Off-line
diagnostics
are not
available for field use.)
DSM provides comprehensive and
flexi-
ble
testing
capability
and allows problems to be checked in an
operational environment.
Since
the
operation
of
the
INP
is
closely
integrated
with
the
computer
system software, a more
meaningful and effective check of
the
INP
is
accomplished
by
using
the
system itself.
DSM begins by verifying the INP hard-
ware and then extends its testing as far into the
communications
network as possible.
If modems with local and/or remote loopback
are installed, DSM uses these facilities to test that portion
of
the link.
DSM operates interactively with either a customer user
or an HP support user, offering appropriate tests and replies for
each level of user.
The use of the Diagnostic/Support Monitor is
described in detail in the HP 30010A / 30020A/B Intelligent Net-
work Processor Diagnostic Procedures Manual.
(Refer
to
the
Preface for manual part numbers for ordering.)
4-2
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Table of Contents
Troubleshooting
