Clear-Com LMC-64 - Manual (Page 116)

Clear-Com
Eclipse Median Instruction Manual
8 - 4
on the backplane, or a crack in the backplane can cause all of the
matrix’s power-supply lights to go out because the path on which the
electric current is traveling has been blocked.
This is a rare problem, but one to consider as a possibility. Repairing
the problem in this case would involve determining whether the
problem is in the power supplies or the backplane connectors.
When a problem is identified in the power supplies, the backplane
connectors, or the circuit cards, the suspect component can be
replaced with a properly functioning component to see if the problem is
repaired.
Specific Troubleshooting Examples
Troubleshooting more specific problems becomes easier when
keeping these general principles in mind. The following examples
describe specific problems and suggested solutions.
Problem: All of the power supply lights do not illuminate on
one port card
Before repairing or replacing card, try to determine where the problem
is occurring. One or both of the following options can be tried:
OPTION 1 Take the bad card out of the matrix, and insert it into a
known good slot in the matrix.
• If the power supply lights still do not illuminate, the problem is
probably in the card itself. Repair or replace the card.
• If the power supply lights illuminate, the problem may be in the
matrix’s backplane connectors, which carry electric current from
the power supplies to the cards. The matrix can be returned to
Clear-Com for investigation or repair. In the meantime another
matrix can be substituted for the damaged one. Clear-Com may
ship a spare matrix to use while the damaged matrix is being
repaired depending on the support status. Please refer to the
warranty and support sections in this manual.
OPTION 2 Take a known good card, and insert it into the bad slot.
• If the power supply lights illuminate, the problem is probably in the
card. Repair or replace the card.
• If the power-supply lights do not illuminate, the problem may be in
the matrix’s backplane connectors, which carry electric current
from the power supplies to the cards. The matrix can be returned
to Clear-Com for investigation or repair. In the meantime another
matrix can be substituted for the damaged one. Clear-Com may
ship a spare matrix to use while the damaged matrix is being
repaired depending on the support status. Please refer to the
warranty and support sections in this manual.