My new "old" D550 (235/325watts) puts out good wattage on low (230 watts) but only about 200 watts on the high (325 watts). I've cleaned and tightened the tip. I took the switch apart and cleaned it with brake cleaner (very greasy). (May add grease back to prevent oxidation) No increase in high wattage. I checked the power by bypassing the switch and jumping from hot wire to each side of the switch; low setting good (230 watts) ; high still 200, nowhere near 325 watts. So now what ??? My only thought is that low power only uses a part of the winding, the high winding may be shorted and is also using only a portion of the winding. Any advice? This is my first, used soldering gun so I am new to this game. Any references to check the functionality of the transformer would be appreciated. Electrical is a weak point.
PS: My gun is in pretty good conditon. It doesn't look like it has been abused in any way .
See a similar gun repair here:
PS: My gun is in pretty good conditon. It doesn't look like it has been abused in any way .
See a similar gun repair here:
Last edited: