1. Upgrading Hf 90a Welder

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Upgrading Hf 90a Welder

Go to This site also has manuals to down load. The guys at the phone number are real nice and will do what they can to help you. Your welder has to pcbs.

The main one one the transformer and a motor speed control behind the speed control. Post a picture of the burnt spot. We might be able to give you a clue why it burnt. Honda pes 125 service manual. You might even be able to send it to the Lincoln WCT guys. The web site is A&A Hydraulic repair, While they will sell parts and repair centery welders, they do not supply phone support.

They will send you to the number I posted. Well it looks like whatever that black component on the lower left corner of the board mounted to the heat sink shorted out. I'm not sure what it is because I can't read the number on it but it is probably an SCR or triac.

It looks like it must have shorted and then the trace overheated and melted like a fuse. If you post the number stamped on it I can find out exactly what it is. The other 4 are most likely diodes because it looks like only 2 leads are being used on them while all three leads are being used on the suspect one.