Tweco 81 with SL100SV - 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.