Removing and Installing Circuit Boards in the Equipment Cabinet
CAUTION
Circuit boards are susceptible to damage caused by electrostatic discharge, and you must keep this fact
in mind as you handle the circuit boards. Refer to the Comdial publication IMI01-005, Handling Of
Electrostatically Sensitive Components, for general information. Specific handling precautions are also
included in this installation instruction.
The Impact FX system may include some installed circuit boards when it arrives at your site. The equipment
cabinet provides universal slots that will accept either line or station boards.
When removing or installing circuit boards in the Impact FX cabinet, you must wear a static discharge wrist strap.
Be sure that the strap is touching bare skin and is connected to an AC or earth ground.
Unless a circuit board has a pre-charge port on its front panel, disconnect the AC power cord from the AC outlet
and disconnect the cable between the cabinet and any external battery back-up assembly before you remove or
install the circuit board. However, if the board does include a pre-charge port, you can connect a standard
telephone handset cord between the pre-charge port on the circuit board and the pre-charge port on the power
supply assembly (FXS) and remove or install the circuit board while the system is operating. On FXT systems,
the pre-charge cord is pre-wired to the power supply and hangs between it and the circuit board cage.
Whenever you remove a circuit board from the cabinet, immediately place the board in a static protection bag
while you still have your wrist strap in place and properly grounded.
4 – Installing The IST Board
IMI89–268
Installing The IST Station Board
Dedicated Auxiliary Board Slot
Dedicated CPU Board Slot
Universal Board Slots 1 through 6
(Used for Line or Station Boards)
Typical Circuit Board
Pre-charge Port Location
Power Supply Assembly
Pre-charge Port Location
Circuit Boards Locations in an FXS Cabinet
CPU Board and
Services Card
Auxiliary Board
Universal Slots
Power Supply
F
X
IS
T
001
Pre-Charge Cord is located
between the power supply and
circuit board cage.
Circuit Board Locations in an FXT Cabinet
