• The "CN" numbers describe the connector number on the engine board.
CN Component Condition Symptom
5-25 Paper Exit
Open
The Paper Jam indicator will light whenever a
print is made.
Shorted
The Paper Jam indicator lights even if there is
no paper.
5-30 Paper Overflow
Open
The paper overflow message is not displayed
even when a paper overflow condition exists.
Shorted The paper overflow message is displayed.
14-29 Registration
Open
The Paper Jam indicator will light whenever a
print is made.
Shorted
The Paper Jam indicator lights even if there is
no paper.
14-14 Mlt Paper end sensor
Open
The Paper End indicator lights even if paper is
placed in the Mlt paper tray.
Shorted
The Paper End indicator does not light even if
there is no paper in the 1st paper tray.
14-17 Tray1 Paper end sensor
Open
The Paper End indicator lights even if paper is
placed in the 1st paper tray.
Shorted
The Paper End indicator does not light even if
there is no paper in the 1st paper tray.
14-20 Remaining paper sensor 1
Open
The machine cannot determine the paper
near-end condition properly.
Shorted
14-23 Remaining paper sensor 2
Open
The machine cannot determine the paper
near-end condition properly.
Shorted
14-27 Toner End
Shorted Toner near-end (toner end) is not detected.
Low The add toner message is displayed.
Switches
4. Troubleshooting
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