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For questions about troubleshooting circuits. Please note that repair questions must involve specific troubleshooting steps and demonstrate a good understanding of the underlying design of the device being repaired.

1 vote

Tenma 72-320 scope no trace need help

Alright, I guess this counts as an answer. I'm an idiot. I checked so many things, checked that CRT connector til I was blue in the face. Missed a not so obvious check though. The connector going to t …
JasonB0020's user avatar
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1 answer
256 views

Tenma 72-320 scope no trace need help

I am working on a 72-320 Tenma scope. It was supposed to have worked before it was put on a shelf, and after being taken off the shelf it has no trace. I'm pretty sure it's the power supply, but I'm n …