User Manual

Troubleshooting: C–CCP Backplane – continued
5/21/04 1X SC4812T–MC BTS Optimization/ATP 6-17
DRAFT
Table 6-21: No MCC Channel Elements
Step Action
1 Verify CEs on a co–located MCC (MCC24 TYPE=2).
2 If the problem seems to be limited to one MCC, replace the MCC with a known good MCC.
– Check connectors (both board and backplane) for damage.
3 If no CEs on any MCC:
– Verify clock reference to MCIO.
4 Check the CDF for MCCTYPE=2 (MCC24E); MCCTYPE=0 (MCC8E) or MCCTYPE=3 (MCC–1X)
DC Power Problems
Perform the procedure in Table 6-22 to troubleshoot a DC input voltage
to power supply module failure.
Potentially lethal voltage and current levels are routed to
the BTS equipment. This test must be carried out with a
second person present, acting in a safety role. Remove all
rings, jewelry, and wrist watches prior to beginning this
test.
WARNING
6