Mitel 3300 Technician's Handbook page 173

Accessing the MXe Carrier Board
Before you can add or replace a component, you must first access the
MXe carrier board.
1. Power down the controller and remove the controller cover (see
page 47).
2. Attach the anti-static strap to your wrist and connect the clip to the
controller chassis.
3. If an Analog Main Board (AMB) is present, disconnect the power cable
and ribbon cable that connects the AMB to the MXe carrier board (see
Figure 32).
Figure 32: Disconnecting the AMB Power Connector
4. If the controller has an APC-MXe installed, disconnect the blue IDE
cable connector from the ETX PATA connector on the MXe II carrier
board. If the controller doesn't have an APC-MXe, this cable will not be
present (see Figure 33 for the location of the ETX PATA connector).
5. Disconnect the power cables from the MXe carrier board (see
Figure 33).
Install and Replace Units
163