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Old 01-07-2022, 07:17 PM   #7
Join Date: Jan 2022
City & State: Edmond, Oklahom
My Country: USA
I'm a: Knowledge Seeker
Posts: 20
Default Re: Need some help with Epson Printer Power Supply.

Voltage across C51/C52 is 0volts, but it pulses up to between 1-3 when the supply comes on, immediately drops to 0 volts when the supply kicks back off.

Voltage across C-12 is a steady 165.

I measured the resistance between the +42 volt output and ground. 0.3 ohms. I would say I have a direct short somewhere on the main board!

I am guessing my hunch about the power supply was incorrect. There are several caps on the main board. I am wondering if one of those is shorted.

It does not appear any of them have leaked or are bulging.
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