RF Board and Heat Sink
8-26
LigaSure Vessel Sealing Generator Service Manual
5.
Remove the control board. For further information, refer to
Remove the
Control Board
in this chapter.
6.
Disconnect several cables:
7.
Remove several screws (M4 x .7 x 8):
8.
The RF board rests on four keyhole standoffs.
a.
Slide the board forward to release it from the standoffs
b.
Lift the board about 1/4 inch to clear it from the standoffs.
c.
Pull the board forward to remove it from the chassis.
If you are replacing the heat sink, refer to
Remove the Heat Sink
and
Install the
Heat Sink
in this chapter. If you are replacing the entire RF board, refer to
Install
the RF Board
in this chapter. Note that, once you have removed the heat sink, you
can also replace the HV field effect transistor (FET) at Q5 on the RF board.
Name
Ref
Location
Wires
Colors
Footswitch
ribbon cable
J3 on
foot-
switch
board
Upper edge of
footswitch board
ribbon
LV power
supply cable
J7 on
RF
board
Near left edge of
RF board and in
front of LV power
supply
4
black, blue, red,
and orange
HV power
supply ribbon
cable
J6 on
RF
board
Near left edge of
RF board and in
front of LV power
supply
ribbon
red and gray
HV DC cable
J9 on
RF
board
Near the front left
corner of the RF
board
4
2 red, 2 black
No.
Type
Location
2
Steel, with
washers
Bottom of unit near ventilation vent
2
Steel, with
washers
At either end of the control board connector on
the RF board
1
Steel, with
washers
Near back side of heat sink
1
Steel, with
washers
At front left corner of RF board
1
Nylon
In the center of three transformers
2
Nylon
At the center and at the right front of the RF
board
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