Clear-Com LMC-64 - Manual (Page 115)

Clear-Com
Eclipse Median Instruction Manual 8 - 3
TROUBLESHOOTING
When attempting to identify the cause of the trouble, it is helpful to
begin with the two most basic areas which cause malfunctions:
• The flow of electric current from the power supplies to the cards.
• The flow of data between the program software, the circuit cards,
and the attached remote devices.
The following sections discuss troubleshooting these two basic
categories of problems.
TROUBLESHOOTING POWER-SUPPLY PROBLEMS
General Principles
Electric current in the matrix starts at the power supplies, travels
through the matrix’s backplane connectors, and then travels to the
circuit cards themselves. When power-supply problems occur, those
three areas—the power supplies, the backplane connectors, and the
circuit cards—should be explored to identify where the trouble is
occurring. Solving power-supply problems starts with identifying the
specific component causing the problem.
Note: The matrix’s backplane connectors are part of the matrix’s
infrastructure and are not serviceable by field personnel. If
it is determined that a problem is in the matrix’s backplane
connectors, the matrix must be returned for repair.
Backplane connector malfunctions are rare, but should be
considered as possibilities. 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.
If any equipment needs to be returned to Clear-Com, follow
the procedure described in the warranty and support
sections in this manual for obtaining a return authorization
number from the Clear-Com Service Department.
A lit power-supply light on a component indicates that the matrix’s
electric current has traveled successfully to that component and is
powering the component. For example, if the power-supply lights on
the CPU card are lit, the electric current has successfully traveled from
the matrix’s power supplies to the CPU card.
If a power-supply light is not lit on a component, the electric current
has not reached that component for some reason. Knowing where the
current has stalled helps to identify the component that needs repair.
For example, if all of the power-supply lights on all cards do not light,
the electricity supply may have given out either in the power supplies
themselves or in the matrix’s backplane connectors. A faulty connector