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

IGBT Gate Driver PCB

ATTENTION - Plug Wiring

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You can get extra copies through your supplier.

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

source will be seriously damaged when power is applied.

0558004146

January, 2003

PN - 38014, 38052, 31486

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

Service Alert

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