Kyocera 3551ci with DF770 finisher tray not lifting; always saying full...

[The Copy Man]

Re: Kyocera 3551ci with DF770 finisher tray not lifting; always saying full...

So you put the meter on the receiver and got no change, correct? Those sensors have three connections:
-Ground
-5vdc
-Output 0-~5vdc

So start with the sender. Make sure that you have ground and 5vdc to the sender.
Now go to the receiver. Make sure that you have ground and 5vdc at the receiver. Leave the negative at the ground connection and move the positive to the output. What do you get? If you block the sensor what do you get?

So you might be missing the 5vdc at the sender or receiver. Could be the finisher controller or a harness issue.
The sensors might be misaligned. I would not touch that alignment unless I was sure that the sender or receiver is bad.

I have replaced those sensors a few times, but always it was caused by something else. =^..^=

Okay here is the latest: I replaced the tray full sensors (2 eyeball sensors at the top), replaced the finisher control board and the tray lift motor. Still have the same problem. Like I never touched it. Going today to replace the home position sensor which I believe is the middle sensor? Anyhoo I know the bottom sensor works great because the tray always lands there LOL! Also do I have to calibrate the tray full sensors at the top? Or as long as the little nipple is in the hole before screwing down is okay? If I have to realign is the a SIM for that? Or just using the meter?