Tweco 81 with SL100SV User Manual
Page 103
Manual 0-4641
5-39
SERVICE
5
For IGBTs:
a. Apply a round thermal pad to the heatsink with a small piece of light-duty tape. The tape must cover no more than 1/
8" (3 mm) of the edge of the thermal pad. Use the screw hole in the heatsink as a guide to position the board.
Washer
Screw
Output Diode
or IGBT
Round
Thermal Pad
Art # A-03702
Tape
Tape
b. Secure replacement board(s) with the screw removed previously. Ensure that the washer is under the head of the
screw.
9. Torque screw(s) to 17 in-lb. (1.9 Nm).
NOTE
Failure to torque properly will cause component damage.
10. Connect wires per the chart.
IGBT A
Connector
To Main PCB
Connector
IGBT B
Connector
To Main PCB
Connector
J3
J25
J3
J31
J7
J30
J7
J26
E9, E11
E10
E9, E11
E27
E19, E21
E20
E19, E21
E30
E12, E17
E4
E12, E17
E23
IGBT A
IGBT B
CutMaster 81 IGBT Connections
11. Stand the unit upright; reinstall the cover.