MERLIN LEGEND Communications System Release 6.1
Maintenance and Troubleshooting
555-661-140
Issue 1
August 1998
Page 4-34
Module Problems
Module Problems
If you suspect that a module is faulty, perform the following procedures:
■ To identify the cause of module errors, run the module tests described
below.
■ To determine whether the module is faulty, replace it with a module of the
same type. If the errors cease, the problem is solved.
Module Tests
The module tests in this section identify the cause of module malfunctions. After
each module test, record any errors on the repair tag that will be shipped with
the faulty module. If the module is sent for repair, this helps repair personnel
troubleshoot the cause of the malfunction.
You should read through the following section, “Module Test Process,” before
running any module tests.
NOTE:
A module on which you run tests cannot be used for service. Because
your customer depends on this service, run module tests during off
hours, if possible. If you cannot, minimize the time required for each
module’s downtime whenever possible.
Module Test Process
Figure 4-6 shows the module test process. Refer to it and the text that follows
for the recommended approach to testing modules.
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