ESAB Service Alert IGBT Gate Driver PCB PN - 38014, 38052, 31486 Troubleshooting instruction

0558004146

January, 2003

Service Alert

IGBT Gate Driver PCB

PN - 38014, 38052, 31486

ATTENTION - Plug Wiring

Replacement Driver PCB's for:

Model PN Model PN

PCM-500i All ESP-100i All
PCM-750i All Precision Plasma All
PCM-875 All ESP-200 All
PCM-1125 All

The IGBT driver PCB (Part Numbers – 38014, 38052 and 31486) could have the plugs wired
inconsistently. There are two driver PCB’s in each model listed above. If replacing only one driver
PCB be sure the plug wire sequence matches the driver PCB already in the unit. If in doubt replace
both driver PCB’s with recent manufactured replacement parts.

Check to be sure that:

1. Terminal #1 on the PCB is wired (white) to plug pin #4

2. Terminal #2 on the PCB is wired (red) to plug pin #3

3. Terminal #3 on the PCB is wired (red) to plug pin #2

4. Terminal #4 on the PCB is wired (white) to plug pin #1

Note

Plug pin #1 is identified by a triangle positioned over the pin.

Terminal #1 is etched on the PCB

.

If a mismatched set of driver PCB's are installed, the power

Be sure this information reaches the operator.

source will be seriously damaged when power is applied.

You can get extra copies through your supplier.