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Module Problems
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NOTE:
If the system does not recognize a 408 GS/LS-MLX module during testing,
check the release number of the system. The 408 GS/LS-MLX module does
not work with Releases 1.0 or 1.1. An 008 MLX module must be used to
provide extension jacks with Releases 1.0 or 1.1.
To run a module test, follow the steps below.
To determine which modules are suspect, read the error logs and review
any user-reported problems.
If the error logs indicate the processor is the problem, refer to
“Processor Problems,” earlier in this chapter, to service the processor
before continuing.
Replacing a faulty processor may resolve module problems.
Busy-out or reset the module.
●
See “Busy-Out and Reset” for general guidelines.
Run the internal Ioopback test.
See “Internal Loopback Test,” later in this chapter. If errors occur, record
them as described in “Considerations” above.
Run the board controller test.
See “Board Controller Test,” later in this chapter. If errors occur, record them
as described in “Considerations” above.
For MLX modules (008 MLX and 408 GS/LS-MLX), continue with the
B-Channel Loopback test.
See “B-Channel Loopback Test” later in this chapter. If errors occur, record
them as described in “Considerations” above.
For 100D modules, continue with the CSU Ioopback test.
See “100D Module Problems” later in this chapter. If errors occur, record them
as described in “Considerations” above.
Replace the module with a module of the same type, whether you are
troubleshooting or replacing the module permanently.
Restore the module.
Menu
→
Maintenance
→
Slot
→
Dial the slot no.
→
Restore
→
Yes
4-36 Control Unit Problems