Lincoln Electric INVERTEC 270SX Service Manual page 45

C
REMOVAL PROCEDURE
Necessary tools:
- Phillips screwdriver PH02
- A small flat bladed screwdriver (for A)
1. Remove the thermostats harness (A), signal harness (B) and unscrew the power harnesses (C)
2. Unscrew the 4 screws in the corner of the board that let it to be connected to the metal stand offs on the heat sink
(D)
3. Remove the potting protection and unscrew the 16 screws that fix the board to the IGBT modules (E)
For the re-assembly operations, make the previous steps in the reverse order.
Add silicon to the zones where the potting protection was removed.
ATTENTION ! : use silicon type with low acetic, viscosity and adhesive grade.
DO NOT USE CORDLESS SCREWDRIVERS FOR THE POWER MODULEs !
DISASSEMBLY OPERATIONS
INVERTER BOARD REMOVAL AND REPLACEMENT PROCEDURE
B
A
ELECTRIC SHOCK
Page 45
WARNING
Disconnect input power before servicing.
Do not operate with covers removed.
Do not touch electrically live parts.
Only qualified persons should install, use
or service this equipment.
CAN KILL
D
E
X4