Paper Jam Detection; Overview; Paper Jam Conditions; Resetting The Paper Jam - Epson EPL-5900 Service Manual

EPSON EPL-5900/EPL-5900L

3.1.5 Paper Jam Detection

3.1.5.1 Overview

DETECTION OF PAPER REMAINING INSIDE THE PRINTER
The printer checks to see if there is paper remaining in the printer by detecting the
signals (H/L) from the paper feed sensor (PS1) and the paper eject sensor (PS3).
DETECTION OF PAPER JAM DURING PAPER PASSING
Paper jam during paper passing is detected by monitoring the timing of rise and fall of
signals from PS1 and PS3.
When paper jam is detected, all the drive is turned OFF (except for the cases as
described below).
CONTINUOUS PRINTING
When detecting case 1 in 3.1.5.2 "Paper Jam Conditions", and if there is paper being
carried in the printer, the printer turns all the drive OFF after ejecting the paper being
carried.
SINGLE PRINTING
When detecting only case 1 in 3.1.5.2 "Paper Jam Conditions", since there is no paper
in the fusing unit, the printer does not turn the heater lamp (H1) OFF, but turns the
other drive OFF.
Troubleshooting

3.1.5.2 Paper Jam Conditions

1. The paper feed sensor (PS1) is turned ON
- within about 0.2 seconds (within about 0.4 sec at 1200dpi) after the multi paper feed
tray starts feeding paper (the paper feed solenoid is turned ON, so that the paper feed
roller starts rotating), or
- within about 0.45 seconds (within about 0.9 sec at 1200dpi) after the second paper
feed unit starts feeding paper.
2. The paper feed sensor (PS1) is not turned ON
- between about 0.2 seconds and 1.48 seconds (between about 0.4 sec and 2.96 sec at
1200dpi) after the multi paper feed tray starts feeding paper (the paper feed solenoid is
turned ON, so that the paper feed roller starts rotating), or
- between about 0.45 seconds and 1.97 seconds (between about 0.9 sec and 3.94 sec at
1200dpi) after the second paper feed unit starts feeding paper
3. The paper feed sensor (PS1) is not turned OFF between about 1.66 seconds and 5.25
seconds (between about 3.32 sec and 10.5 sec at 1200dpi) after the leading edge of
paper reaches the paper feed sensor (PS1) (PS1 is turned ON).
4. The paper eject sensor (PS3) is not turned ON between about 1,79 seconds and 2.34
seconds (between about 3.58 sec and 4.68 sec at 1200dpi) after the leading edge of
paper reaches the paper feed sensor (PS1) (PS1 is turned ON).
5. The paper eject sensor (PS3) is not turned OFF between about 1.77 seconds and 2.39
seconds (between about 3.54 sec and 4.78 sec at 1200dpi) after the tail edge of paper
passes the paper feed sensor (PS1) (PS1 is turned OFF).
6. The paper feed sensor (PS1) is ON when the power ON/OFF switch (S1) is turned ON
or when the cover is closed.
7. The paper eject sensor (PS3) is ON when the power ON/OFF switch (S1) is turned ON
or when the top cover is closed.

3.1.5.3 Resetting the Paper Jam

After the paper jam is cleared, the error display is canceled by closing the top cover.
Overview
Revision B
85