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Subject: Ungar 9900 Soldering Iron Base Station

Complaint: Dead

Diagnosis: Secondary on power transformer is open

Reason: Shit tier QA at factory didn't notice a wire strand bridged across the power transformer output.

Hard to believe they missed that, it's one of the strands from the power transformer's wire. I can't fix it as-is, it will need a replacement transformer or an external transformer. Can't use DC because this particular model uses a light dimmer-like circuit (Triac) to control the heater of the iron.

Subject: Ungar 9900 Soldering Iron Base Station Complaint: Dead Diagnosis: Secondary on power transformer is open Reason: Shit tier QA at factory didn't notice a wire strand bridged across the power transformer output. Hard to believe they missed that, it's one of the strands from the power transformer's wire. I can't fix it as-is, it will need a replacement transformer or an external transformer. Can't use DC because this particular model uses a light dimmer-like circuit (Triac) to control the heater of the iron.

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[–] • 2 pts

The tip is seized in the sleeve, but that should be just a matter of soaking it in some blaster and getting it free.

Word of caution on the tip removal (no jew joke intended). The tip has a "D" shaped shaft that goes down into the sleeve and makes contact with a fragile ceramic heating element. The element is about an inch long and just a couple of millimeters thick so it isn't very resilient. These heating elements are nearly impossible to get hold of these days, so treat it delicately if you remove it. Also might want to clean the PB Blaster off of it before heating it up should you get the unit running again.

[–] • 3 pts

(no jew joke intended)

And yet I laughed

[–] • 1 pt

The sleeve and the tip on this one come off as one piece from the heater assembly, that's what I'm going to soak. https://pic8.co/sh/XeWhia.jpg

[–] • 1 pt

Ah, I see. I think that uses the cylindrical heating element instead of the flat rectangular one in my UTC-290. You might have a better chance of finding that kind as a replacement since Weller continued on with that style after they bought Ungar. The flat ones are pretty much extinct now, unfortunately for me.

[–] • 1 pt

If I can find spares, that's great, but if it dies at some point then it dies.

I can imagine trying to find parts for this one will be like trying to find parts for my old Edsyn units. I bought every tip for my irons the manufacturer had left. When they're gone, they're gone.