Comtech EF Data SDM-9220 - Manual (Page 45)

Hardware Installation
Memotec Inc. 4-3
4.2 Opening the Chassis Casing
NOTE: This procedure must be followed to install a DSP module.
To open the casing of the SDM-9220/9230 chassis:
1. Wear an ESD (Electrostatic Sensitive Devices) wrist strap, and attach it to the ground
lug on the power supply at the rear of the SDM-9220/9230 chassis.
Refer to “Rear View of the SDM-9230 UAC” on page 5-2 or “Rear View of the
SDM-9230 UAC” on page 5-2 for the exact location of the ground lug.
CAUTION: Electrostatic charges can damage system components. Always use
an ESD wrist strap when accessing internal components of the unit.
NOTE: In countries where a 2-pin non-grounded power cord must be used, ensure
that the SDM-9220/9230 is independently grounded with a wire from Ground
securely attached to the ground lug located at the rear of the SDM-9220/9230
chassis.
2. Ensure that the SDM-9220/9230 is securely placed on a hard, flat surface, with the
port connectors facing you.
3. Turn the power switch OFF by pushing it to 0 , and unplug the power cord from the
power supply.
WARNING: To avoid electrical shock and damage to the unit, make sure that the
unit is disconnected from its power source before you access any of its internal
components. Use ESD procedure at all times.
4. Remove the unit cover:
a. Remove the 3 screws that secure the lip of the cover to the rear of the unit
chassis.
b. Pull the cover up slightly from the rear of the unit first, to disengage it from the
clips on the chassis wall that hold it in place.
c. Nudge the cover forward slightly over the front panel.