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Old 01-08-2022, 01:44 PM   #18
Join Date: Jan 2022
City & State: Edmond, Oklahom
My Country: USA
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Posts: 20
Default Re: Need some help with Epson Printer Power Supply C655 MAIN

Originally Posted by R_J View Post
I suspect you may have caused the problem somehow as the transistors that are shorted drive the print head, there are two cables CN10 & CN11, did you maybe reverse them or damage the flex cable?
CN11 has ground pins on either side of the print drive coming from Q10/11
I wondered that myself. I numbered all of the small ribbon cables I removed from the main board to the rest of the printer. then I photographed them as I was removing them. The way the cables lay in the printer, they are pretty tight fit. I would be very difficult to get any of them in the wrong place, but I guess anything is possible. I just wonder if there was water or cleaning fluid in the circuit board located on the printhead and when I connected everything back up that water/cleaning fluid shorted out the board in the printhead, and that took out the main board. That is really the only thing I can come up with.
I have a tested good main board and tested good print head ordered from China...Next year, I should have!!

Frustrating, let me tell ya, thinking I am the idiot who let the smoke out!!
UglyBetty is offline   Reply With Quote