Sensors And Switches - OKIDATA OF2600 Service Manual

Page: 37
Service Guide OF2200/2400/2600
Chapter 1 Principles of Operation

1.6 SENSORS AND SWITCHES

1.6.01 Paper Jam Detection
Paper jam detection monitors the location of paper when the printer is powered ON and during printing. If
any of the following jams are present, the printing process is interrupted and the message PAPER JAM
will be displayed on the LCD.
To return to the printing process, the paper jam condition MUST be cleared. This is accomplished by
opening the upper cover, clearing the jam, and closing the cover.
Paper Outlet Jam
This jam occurs if the paper does NOT pass over the outlet sensor within a pre-determined period of time.
However, the paper has already passed over the paper sensor.
Paper Size Error
The time interval between when the paper contacts the paper sensor and the outlet sensor determines
which size (length) paper is being used.
This error occurs if the paper size of the loaded paper differs by + 45 mm or more from the paper size set
by the menu.
Cover Open Switch
When the stacker cover is opened, the cover open microswitch on the power supply unit is deactivated.
This disables the + 38 vdc and the high voltage power supply circuit. As a result, all high voltage outputs
are interrupted. At the same time, the CVOPN signal is sent to the main control board main control board
to notify it of the OFF state of the microswitch. The main control board executes the cover open routine.
The operation panel displays the message COVER OPEN.