Hello . My welder welded fine then outta blue it just barely cracked an arc or made power I saw,in parts manual just above the #28 resistor ,a solid wire under a cloth sheath it had a small burn mark so I looked all I found was a piece of black plastic and the wirecwas disconected. I got a rectifier #30 in parts man says 25watt 3 ohm but it now works fine disconected and when I hook it up small arc low power. I cant see in manual what is supoosed to be there.looks like a fusible link but it runs without it hooked up.