Lincoln Electric INVERTEC 270SX Service Manual page 52

CONTROL BOARD REMOVAL AND REPLACEMENT PROCEDURE (continued)
5. Using a 5,5 mm nutdriver remove the 4 nuts located on the corners of the solder side of the control board (B)
6. Remove the control board
For the re-assembly operations, make the previous steps in the reverse order.
reconnect the ground cable in the bottom right corner:
During re-assembly operation of a new control board make sure about the position of the dip-switches, follow the
instruction that are inside the new control board box. See extraction below:
DISASSEMBLY OPERATIONS
ATTENTION !
Page 52
ELECTRIC SHOCK
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
B