Lincoln Electric PRO-CUT 25 Service Manual page 44

F-12
MAIN INVERTER BOARD RESISTANCE TEST (continued)
LEAD 2 (NZL)
WRK
LEAD 3 (EL)
Plug J1
Harness
Plug
RIGHT SIDE OF MACHINE
TEST PROCEDURE
1. Remove main input power to the PRO-CUT
25.
2. Remove carrying handle using a 4mm allen
wrench.
3. Using a crescent wrench, carefully remove the
plastic nut from
regulator located on the top of the machine.
4. Using a 7mm nut driver, remove the case
wraparound.
TROUBLESHOOTING & REPAIR
FIGURE F.2
around the pressure
PRO-CUT 25
P1
5. Perform the Input Filter Capacitor Discharge
Procedure detailed earlier in this section.
6. Visually check for burned or damaged compo-
nents. If any components are physically dam-
aged or determined to be faulty, the Main
Inverter Board should be replaced.
7. Check the input rectifier bridge (P1) for
shorts or opens. See Figure F.2
F-12