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Table 3-A Continued
Summary of Fault Symptoms and Potential Solutions
SYMPTOMS
APPLICATIONS PROCESSOR FAULTS AND PRU FAULTS
One of the system's
features does not work.
Troubleshooting and Fault Clearing Procedures 29
PROBABLE CAUSES
The LANlink does not
conform to the system map.
There is a defect in the
LANlink SRU.
The Applications Processor
SRU in which the software
resides is not properly seated.
The Applications Processor
SRU is not in the "Working'
state.
The Applications Processor
SRU is defective.
The PRU is improperly
configured.
The PRU is defective.
CORRECTIVE ACTIONS
Sign on as a System Administrator
and check that the LANlink SRU's
location in the system map matches
the physical location. Correct any
discrepancy.
Take the LANlink SRU out of service
using 'Courtesy Down', and run a
test on it. If it is defective, power the
system down and replace it.
Power the system down and
reseat the SRU.
Take the SRU out of service using
'Courtesy Down', and put it back into
service.
Courtesy down the SRU, power the
system down, replace the SRU,
power the system up, and put the
new SRU into service. Wait for all
PRUs on that SRU to attain the
'Working' state. (It may take up to
five minutes to go from 'Loading' to
'Working'.)
Check that there is an Applications
Processor inserted in the slot that is
listed in the system map as the
PRU's address. If not, correct the
discrepancy. (Power the system
down before removing or inserting
any SRUs.)
To check whether the PRU is
defective, take it out of service using
'Courtesy Down', then put it back
into service using 'Courtesy Up'. If it
does not attain the 'Working' state,
contact NT field support.
Practice 450-1011-501
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