Removing and Installing Circuit Boards in the Equipment Cabinet
CAUTION
Circuit boards for the FX system 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 equipment cabinet provides universal slots that will accept either line or station boards.
When removing or installing circuit boards in the equipment cabinet, you must install a static discharge wrist
strap on your bare wrist, and adjust it for a snug fit. Be sure that the strap is touching bare skin and is not isolated
by clothing. Connect the wrist strap cord between the wrist strap and a 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 service
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 and remove or install the circuit board while the system is operating.
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.
2 Removing and Installing Circuit Boards in the Equipment Cabinet
IMI89–267
Installing The Digital Station Board
