RF Board and Heat Sink
Replacement Procedures
LigaSure Vessel Sealing Generator Service Manual 8-29
Install the RF Board
1. Position the board on the keyhole standoffs in the chassis:
a. Slide the board into the chassis.
b. Position the board so that its keyhole openings are directly above the
keyhole standoffs.
c. Lower the board so that the bottom of the board rests on the standoff lips
(the standoff top reaches through the board keyhole).
d. Slide the board toward the rear of the chassis until the board is snug on the
standoffs.
2. Replace the RF board screws (M4 x .7 x 8):
3. Reconnect several cables:
4. Install the control board. For further information, refer to Install the Control
Board in this chapter.
No. Type Location
2 Nylon At the center and at the right front of the RF
board
1 Nylon In the center of three transformers
1 Steel, with
washers
At front left corner of RF board
1 Steel, with
washers
Near back side of heat sink
2 Steel, with
washers
At either end of the control board connector on
the RF board
2 Steel, with
washers
Bottom of unit near ventilation vent
Name Ref Location Wires Colors
HV DC cable J9 on RF
board
Near the front left
corner of the RF
board
4 2 red, 2 black
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
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
Footswitch
ribbon cable
J3 on
foot-
switch
board
Upper edge of
footswitch board
ribbon
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