Sony UP-D77MD Instructions For Use Manual page 22

If you find a jammed sheet on the way inside the
printer, slowly pull it out to the right. If the tray
cover is in the way, remove it.
3
Press PUSH on the paper tray.
The paper tray pops out.
4
Remove the bottom cover.
5
Check whether any paper is found on the bottom of
the printer. If you find one, remove it.
6
Ensure that the paper is properly loaded.
Discard the sheets removed in steps 2 and 5
22
Troubleshooting
If the tray cover is in the way, remove
it by lifting it up 1, and then pulling it
out to the direction of arrow 2.
7
Re-insert the removed bottom cover, paper tray,
tray cover and/or paper cover into the printer.
8
Press the g button.
The error message disappears and the printer
returns to the standby status.