I have a friends Millermatic 250MP that I am trying to repair. Local
Miller said that the Microprocessor Board is bad, obsolete...

I have the Operators Manual:

https://www.millerwelds.com/files/ow...O1308K_MIL.pdf

It has decent interconnection stuff but just block diagrams for the
main and micro boards. Even with the microprocessor board disconnected
I can't get the wire drive to work. They were sold with manual knobs
(250) and with a Microprocessor/LCD display (250MP). The latter has
menus push-buttons, cool features. This is what I'm working on. Wanted
to prove to myself that the main board was okay. In theory it should
work with just a few jumpers and resistors. Most of it does, except the
wire drive. If I can get it working this way I'll go back to seeing why
the micro board seems to be dead. If I can't figure out the micro board
I may just rebuild it as the simple analog version. That would still be
a nice MIG machine.

I've pretty much exhausted my searching for one. Per a Miller forum and
weldingweb.com forum there is a Tech Manual for it. I don't belong to
either forum so can't nicely ask for one. Hate to sign up and then
start begging right away...

So... does anyone happen to have this manual or can link me to a
download?

--
Leon Fisk
Grand Rapids MI/Zone 5b
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