HP 3000 Series Installation And Service Manual page 45

Maintenance
them from the system and prepare them for reshipment to Hewlett-
Packard in accordance with the instructions in paragraph 5-19.
When troubleshooting procedures have verified a RAM malfunction,
remove the INP-MCU PCA from the system and replace the defective
RAM chip as described in paragraph 5-17.
5-3. MAINTENANCE AIDS
The INP consists of more than just the apparent hardware. It is
actually a sophisticated sys tern 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 (DSM)
• CS/Trace
e
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 5-4.
The Diagnostic/Support r-bnitor (DSM) is available for on-line
diagnostic support purposes. DSM provides comprehensive and
flexible 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 tJbnitor is
described in detail in the HP 30010A
I
30020A Intelligent Network
Processor Diagnostic Procedures Manual. (Refer to the Preface
for manual part numbers for ordering.)
CS/Trace is a software fault-isolation tool that can be used in
the field by HP support personnel. It builds disc records that
contain all transactions that have occurred over the transmission
facility. Upon termination of an operation, the utility program
,CSDUMP is run to format and output the individually accumulated
trace records for analysis.
5-2