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Module Problems
Considerations
Review the following items before you begin a module
System Components
Before running a module test, make sure the following
are working:
test procedure.
system components
■
Power supply
■
Processor.
Save the system programming onto a floppy disk. See
System Programming and Maintenance (SPM.) To back up onto a
memory card, see Appendix D, “Backing Up with a Memory Card. ”
■
Maintenance Terminal
(MLX-20L console or PC). To run tests on the
MLX module connected to the MLX-20L console, you must run the test
from the PC, not from the MLX-20L console.
Busy-Out/Reset
Before running a module test, busy-out or reset the modules. Busy-Out is the
best method, but it will not work if any line or extension is on a stable call. See
“Busy-Out” and “Reset,” later in this chapter, for more information on these
features.
Test Notes
For each test, you should note the following:
■
When beginning the board controller test or the internal Ioopback
module test, choose to run it once or repetitively.
■
You can interrupt any module test by selecting Exit ( (F5) on the PC).
■
A module test can fail for one of the following reasons:
— The module being tested was not busied-out. Exit
the
test, busy-out
the module, and try again.
— The error messages indicate that the module is faulty.
■
If errors indicate that the module is faulty, record them on the module
repair tag immediately after running the test.
Control Unit Problems 4-35