HP 3000 Series Installation And Service Manual page 54

Maintenance
g. Replace thE·
RAM
chjp that was identified in table 5-2 as
being defective. (See paragraph 5-17, "Field Replacement of
a
RAM
Ch
j
p
11
• )
h.
Repeat steps
d
through g (to cover the possibility that more
than one
RAM
chjp had failed simultaneously).
i. If the LED 7-6-1-0 combination is lighted, one of the
parity-bit
RAM
chjps has failed. Replace both parity-bit
RAM
chipE (U95 and U96). (See paragraph 5-17, "Field Replacement
of a
RAM
Ch
j
p 11
• )
j.
If LED ccmbinatior. 7-0 is being displayed (indicating the
successful completion of the self test), run DSM for more
extenEive troubleshooting. (Refer to the support-user/DSM
operatior.::: described in the HP 30010A / 30020A Intelligent
Netwcrk ProceE.sor Diagnostic Procedures. Manual.)
k. If any othE·r combination of lighted LEDs (ncit already covered
in steps f through
j)
is being displayed as a result of your
h;;ving pressed the REST'Ahi' switch in step d, replace both INP
PCA boards (part no. 30010-600Cl and 30010-60002). (See
paragraph 5-18, "Replacement of the PCA Boards".)
NOTE
When sending PCA boards to the factory for
replacement, refer to paragraph 5-19,
"Resh]pment InE.tructions". Include in the
package your noted observations from step b;
they may be helpful during factory-level
troubleshooting. Also, if a 5-0 or 3-0 LED
pa.ttern was observed in step b, an !NP dump
file
may
have been created in PUB.SYS
(labeled
INPLOGn~
, where nn is in the range
fr cm 0 0 to 9 9 ) • I f they can b e 1 o ca te d ,
these INPIOG files should also be included
in the package with the defective equipment.
(See Append ix B for further information on
the INF dump files.)
5-11