Lincoln Electric 11141 Service Manual page 81

F-35
OUTPUT RECTIFIER MODULES TEST (continued)
_
5. If 200 ohms is measured then the output
diodes are not "shorted".
NOTE: There is a 250 ohm resistor across
the welding output terminals. See Wiring
Diagram
6. If less than 200 ohms is measured, one or
more diodes or the snubber board may be
faulty.
7. Perform the Filter Capacitor Discharge
Procedure detailed in the maintenance sec-
tion.
8. Locate the output diode modules and snub-
ber board. See Figure F.10.
TROUBLESHOOTING AND REPAIR
Figure F.9 – Terminal Probes
POWER WAVE
+
9. Test all output diode modules individually.
Test for open diodes also.
NOTE: This may require the disassembly of
the leads and the snubber board from the
diode modules. Refer to the Output
Rectifier Modules
Replacement Procedure
instructions.
® 355M/405M
F-35
Removal and
for detailed