Polycom DOC2237A - Manual (Page 153)

MGC Hardware and Installation Manual
5-9
Corrective Maintenance
Corrective maintenance refers to changing or replacing an element of the
system that is faulty. The MGC has several components in which problems
may occur:
• Main Control Module
• Functional Modules:
• Network Interface Modules (ISDN/T1-CAS, ATM, IP and MPI and/or
Serial)
• MUX and MUX+ Modules
• Audio/Audio+ Modules
• Video/Video+ Modules
• Data Modules
• I/O Cards
• Power Supply Module
• Fans
Before replacing parts:
• To ensure a part needs replacing, complete the troubleshooting
procedures.
• Identify exactly which part needs replacing.
• Make sure you have the correct replacement part on hand.
• Make sure you are using proper ESD equipment, to prevent damage to
the system.
Warning!
• All maintenance tasks are to be performed by qualified, authorized
personnel.
• Use only replacement parts supplied by your dealer.
• Follow all procedures. Do not skip any steps.
Unless specified differently, the procedures described here are the same for
both the MGC-100 and the MGC-50.