Covidien Force FX, Service Manual

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Front Panel
Principles of Operation
Force FX Electrosurgical Generator C Service Manual
4-13
Front Panel
The front panel consists of an injection molded plastic bezel with a membrane keyboard,
power switch, CEM mechanism switch, and REM connector with switch. These front
panel components interface with the Display board and the Power Supply/RF board.
Membrane Keyboard
The membrane keyboard is attached to the bezel with a high strength adhesive. It is not
removable. The membrane contains 16 metal dome push-button switches. Six of these
switches control the up and down sequencing of the power seven-segment LEDs (light-
emitting diodes). One switch controls the previous settings Recall function and nine
switches control each of the nine output modes of the generator.
The membrane also contains nine LEDs, one for each mode. A 25-pin flat ribbon cable
connects the membrane keyboard switches and LEDs to the Display board.
Power Switch
A double pole single throw switch snaps into the front of the bezel. This switch supplies
the AC mains current to the generator.
REM Connector/Switch
An internal REM connector and sense switch connects to the inside of the bezel with two
screws. Two cables leave this assembly. One cable is the actual REM connector; the other
cable is the output of the internal switch that senses the presence or absence of the
center pin on the REM plug.
CEM Mechanism Switch
A small plastic lever arm mechanism is attached to the inner wall of the front panel bezel
on the Monopolar 1/CEM output jack. When you connect a CUSA handpiece with a CEM
nosecone to the Monopolar 1/CEM Instrument receptacle, the arm actuates a small
switch that connects to the Display board with a 4-pin connector.