NEC EXPRESS5800/120Rd-1, Service Manual

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7 Service Guide
4.4
Repair and Troubleshooting
If a failure occurs during operation, be sure to dump the data if possible (if you can dump the data by
actually performing the dump procedure).
If having dumped the data, issue the Difficulty Form to request for detailed analysis by taking the
designated steps.
To identify a faulty location, basically execute POST and the T&D program and make sure of
presence/absence of a hardware fault.
Error information is shown on the display.
Figure 4.1 shows the flow of troubleshooting by POST and the T&D program.
Normal
Error
Error
Log
Y
Replace the package
N
Identify possibly faulty package
according to message
Execution of POST
Execution of T&D program
Log analysis by
NEC ESMPRO
Replace the package
Identify possibly faulty package
according to message
Replace the package
Identify possibly faulty package
according to message
Y
Y
N
N
POWER ON
Figure 4.1 Troubleshooting Flow