the screw will be running horizontally and will have the head facing left. You will need to remove the back plastic cover piece that is under the scanner and that screw is on the left side near the hinge area just behind the hinge. then carefully remove the scanner and unplug the ribbon cable on the right side. It will take about 5 minutes to fix, I removed 4 screws 1 on the center of the back piece near the bottom, another from the top left of the scanner (while facing the back of the printer) where the hinge is located there is a screw running into the hinge. The position is actually not that critical it just needs to be positioned correctly so it blocks the hall effect and is not hanging up. I used a very thing flat screwdriver and a magnifying glass with a bright light.
#SUBLIMATION MESSAGE FREE#
to do this you will have to bend the tabs left or right (both tabs will probably need to be bent to position it in place and not allow it to have any free play. So that needed to be re-centered between the rollers. then I saw it was also hanging up on the other end between the rollers. Mine had to be adjusted on both tabs and also needed to be adjusted in and up, meaning i had to bend both tabs upward to get the piece that blocks the hall effect switch back into a fully closed position which it did look as though it was doing until i looked closely at the position and saw it was a tiny bit lower than it could be.
So there is a need to examine exactly why the arm is not fully closing. First thing I did to confirm this was to push on the arm where the hall effect switch is on the board and it stopped the paper jam instantly. The tabs will eventually sag downward and will either bind up the arm so it cannot fully swing closed again or it will move the thin part so it hangs up on the rollers and will not allow the arm to fuller return to the position it needs to be to close the gap in the Hall effect switch. So the cause of the jam is due directly to the tabs that epson has in place to hold that black or brown arm in position. the arm will swing to open the area that is normally closed and will block the path of the switch. meaning the switch is not detecting the normal blocked state by the arm. When it swings the hall effect switch is open. One end goes to the main circuit board and controls a hall effect switch, the other end goes to the middle of the paper feed area and has a thin arm that sticks in between the rollers and it swings when paper is fed past it. The sensor works off of a small black or brown piece of plastic that runs across the back of the roller assembly that catches the edge of the paper to get it started into the carriage area. they have not allowed enough material to hold the paper jam detector in the correct position. it's a simple fix and it's due to epson's poor design. i also took pictures of the area that needs attention.
i took it apart and found out exactly what is going on with these printers. Epson xp300 paper jam every time even with no paper.
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