that shouldnt be an EV200LX although you do use the LX handset to program it
that is a GE SX (separately excited) 600A controller (by GE part#)
its transistorized not SCR
other than that do you have the original parameter list?
this is a beast of a truck for a non-linde tech
in addition to a GE handset and set and 12 pin SX cable
you need truck doctor or the comparable handset too
Email me if you need more info
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