section 6
6.4 testing and replacing components
notice
power semiconductor components
Categories of power semiconductors include;
•
Power Rectifiers
•
Modules containing the free wheeling diodes and IGBTs
•
Replace a PC board only when a problem is isolated to that board.
•
Always disconnect power before removing or installing a PC board.
•
Do not grasp or pull on board components.
•
Always place a removed board on a static free surface.
•
If a PC board is found to be a problem, check with your ESAB distribu-
tor for a replacement. Provide the distributor with the part number of
the board as well as the serial number of the power source.
•
Do not attempt to repair the board yourself. Warranty will be voided if
repaired by the customer or an unauthorized repair shop.
48
troubleshootinG