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307

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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[–] • 0 pt

It's like anything else. Part of it is knowing what you're looking at (as far as the board, components, etc.) and part of it is just having done it for a while. There are certain things you check, i.e. does the thing have power? No? Whatever powers it is a good place to start.

If you're interested in basic electronics, there's more information out there than you can digest in a lifetime. Just jump in.