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Fault analysis 72
Model 3196RC T-DAC User Manual 5 • Troubleshooting and maintenance
Fault analysis
The following procedures outline steps you should follow when troubleshooting a Model 3196RC malfunction.
1. If possible, talk to the person who filed the trouble complaint and determine the operational symptoms.
Record the symptoms on the appropriate trouble report form (include the front panel LED indications).
2. Refer to table 8 for LED definitions and compare the recorded results from the trouble report against those
in the table, then refer to the section recommended in the table for the maintenance procedure that will
repair the malfunction.
Table 8. LED definitions
LED Location Color Status Meaning
POWER Front
panel
Green On
solid
Power is being applied. No action recommended.
Flash-
ing
The 3196RC has detected a power failure on a power
bus. There may be a problem with the CPCI power sup-
ply system such as a failed power supply module in the
chassis. The Model 3196RC will function normally with
one power supply. Inspect the power supplies in the CPCI
chassis to identify and replace the failed power supply
module. If the POWER LED continues flashing when all
chassis power supplies are functional, contact Patton
Technical Support to determine if the T-DAC should be
replaced.
Off No input power is being applied. Verify that at least one
chassis power supply module is installed in the chassis
and functioning normally.
CPU FAIL Front
panel
Red On
solid
CPU is unable to load the software from FLASH to RAM
for operation. As soon as possible, remove the Model
3196RC from the CPCI chassis, wait 30 seconds, then re-
insert the Model 3196RC into the CPCI chassis and see if
the problem disappears. If the CPU FAIL LED remains lit
after the Model 3196RC completes the power-up cycle,
contact Patton Technical Support to determine if the T-
DAC needs to be replaced.
Off The CPU is operating normally. No action recommended.
ALARM Front
panel
Red On
solid
A minor alarm condition has been detected.
Flash-
ing
A major alarm condition has been detected.
Off The Model 3196RC is operating normally. No action rec-
ommended.