User`s guide

8-4
Adding/Swapping Modules and Maintenance
1. Disconnect the power cord from the ATX.
2. Pull the small plastic fuse drawer below the power input
connector directly outward.
3. Remove and replace the fuse.
Caution: For continued protection against fire hazard, replace only with
250V slow-blow 6.3 amp fuses.
4. Push the fuse drawer back into the power input filter housing
until it snaps into place.
8.3.2 Fan Filters
Each ATX comes equipped with three fans located in the back of
the unit. The screens covering these fans need to be cleaned on an
annual basis to prevent overheating. You don’t need to remove the
fans or screens to clean them. Use any spray non-residue dust
remover to remove the dust.
Note: If your environment is dirty, the filters may need to be cleaned more
frequently.
8.3.3 Hot Swapping the Power Supply
It is critical that the power supply inserted into the top slot of the
ATX chassis be installed very carefully if you are installing it while
the ATX is powered on. Failure to use caution while installing the
power supply could cause it to come in contact with the bottom of
the Packet Processing Engine (PPE) board, causing the PPE to short
circuit.
Warning: Removing the ATX Power Supply must be performed by
qualified service personnel. Failure to follow all instructions
and warnings may result in an electric shock hazard.
The power supply must slide straight into the chassis underneath
the tabs shown in black in Figure 8-1 and rest on its metal support
bracket, also shown in Figure 8-1. If you attempt to slide the power