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SNC-BD (Switch Node Clock Circuit Pack)
Issue 1 June 2005 2033
101 FAIL The SNC circuit pack has on-board microcontroller failure.
1. Replace the SNC circuit pack.
128 FAIL The SNC circuit pack has a problem with its clock; firmware has detected
a phase-locked loop failure, an inability to lock, or a failure of the clock
drivers.
1. Replace the SNC circuit pack.
129 FAIL The SNC circuit pack has a problem with the SNC on-board Stratum-3
oscillator.
1. Replace the SNC circuit pack.
130 FAIL The SNC circuit pack has a problem with the TPN microcontroller.
1. Replace the SNC circuit pack.
PASS No problems exist with the on-board functions verified by this test.
0NO
BOARD
No board was detected by the test.
2. Check that SNC board is properly translated and inserted.
3. Run the test again. If it fails, reset the board. An SNC should be reset
instead of reseating the circuit pack. The reset board command
should almost never be used on an SNC. It may be necessary to use
reset board if the SNC circuit pack gets into a mode where it
cannot communicate with software. If an SNC with active errors and
alarms is reset, the errors and alarms may take a while to come back,
therefore reset board can mask real problems.
4. Run the test again. If it fails, the ID chip on board may be bad.
Replace the board and retest.
Table 742: TEST #778 SNC On-Board Test (continued)
Error
Code
Test
Result
Description / Recommendation
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