Welcome • User Guide
ToS • Privacy • Canary
Donate • Bugs • License

©2024 Poal.co

1.1K

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.

(post is archived)

You are currently inside a comment thread.
Click here to see all the comments (24).
[–] • 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.

[–] • 1 pt

When they're gone, they're gone.

Sad but true.