Polycom DOC2237A - Manual (Page 155)

MGC Hardware and Installation Manual
5-11
8. Referring to the labels, reconnect the external connections to the I/O
card.
Replacing the Fuse
Use the following procedure for replacing the fuse in the MGC-50:
1. If the MCU is working, exit the MGC Manager application and turn off
the MCU. Otherwise, skip this step.
2. Switch off the power in the MGC unit.
3. Disconnect the power cord.
4. Release the latch of the fuse holder and slide the fuse holder out of the
MGC unit.
5. Pull the fuse out of the fuse holder.
6. Insert the new fuse into the fuse holder. Use a fuse that meets the
specifications as defined in see Chapter 4, “Fuse/Circuit Breaker (AC
Power)” on page 4-22.
7. Slide the fuse holder into the MGC unit and push it in firmly to engage
its latch.
8. Connect the power cord.
9. Switch on the power.
Replacing the Power Supply Modules for the MGC-100
(including the NEBS Unit)
The Power Supply Modules are hot swappable and can be replaced with the
system running. Use the following procedure to replace a faulty Power
Supply Module:
1. Unscrew the 4 screws on the front panel of the MGC-100 that secure the
Power Supply Module.
This procedure is also relevant for earlier versions of the MGC-100. Current
MGC-100 units are provided with a circuit breaker instead of a fuse.