Lincoln Electric MULTI-SOURCE SVM155-A Service Manual page 56

F-28
Anode
Cathode
5. Remove the red insulating paint from heat
sink test points. See Figure F.12.
6. Perform test procedure as follows. Refer
to Figure F.13.
SCRs.
TROUBLESHOOTING & REPAIR
ACTIVE SCR TEST (Continued)
FIGURE F.12. SCR Heat Sink Test Points
Repeat test for all six
MULTI-SOURCE
Remove
Red Paint
NOTE: Do not disassemble the heat sinks.
F-28