Repairing Maxstar 150 sth

diablodude64 · Mar 15, 2014

I just picked up a broken Miller Maxstar 150 sth and I am trying to repair it. When I turn it on there are a few solenoid clicks and then the blue power light just blinks continuously. No temperature light or anything else.

I have read in the manual that this is from "line voltage too high or too low". So I pulled the machine apart and looked for anything obvious. There were three ceramic resistors bunched together that looked good on top, but on the bottom of the PCB it looks a little bit burnt under them. I haven't tested them yet but I plan too and will post back with what I find.

Does anyone know if there are any common components to check when repairing these?

Thanks for your time!

Astrobuf · Sep 1, 2022

I too have a Maxstar 150 sth that is not working. Anyone have a recommendation on a vendor that does board level repair?

cwby · Sep 1, 2022

Maybe Inovat corp.

https://www.innovatcorp.com/pc_board_repair_price_list

FrankcoProducts · Sep 5, 2022

I provide board repair for these machines, frankcoproducts.com To my knowledge there are only a couple of companies that will repair them and I'm one of the providers, only issue right now is I am back logged.

FrankcoProducts · Sep 5, 2022

You'll likely end up replacing a number of parts, the usual suspects are the igbt's, input rectifiers, power factor correction... Handful of other stuff too. The components are only the half of it because when one of the igbt or diodes go out, so does the trace and through hole for that component.

smithdoor · Sep 5, 2022

Does the main relay work?.
Do you have a schematic you can post?

Dave

Repairing Maxstar 150 sth

Top Contributors this Month

Recommended Communities