90
n Paper Ejection Section
chap.2
2Paper jamming on the ejection side
JAM1: The bottom end of the paper is not ejected.
When the JAM sensor (light-emitting and light-receiving) is interrupted at the timing of JAM detection
position edge (photopassing \ photointerrupting) of the drum stop / JAM detection position sensor
PS5.
JAM2: The tip end of the paper is not ejected.
When the JAM sensor is not interrupted at all while the P-roller sensor is in the state of photopassing
(pressed ON).
JAM (stop): When the JAM sensor is interrupted as the top blow fan unit is open when the machine stops.
The display is cleared when the sensor is in the state of photopassing.
2Paper jamming on the feeder side
JAM3:
The paper does not pass the signal sensor though the paper is fed. The P-roller sensor is not in the state
of photopassing when the drum rotates twice after the paper feed is ordered ON.
1. Paper Jam Detection Timing
Description
Paper jamming is divided into two types: "PAPER JAM ON THE EJECTION SIDE" and "PAPER JAM ON THE
FEEDER SIDE". Paper jamming is detected under the following conditions. When paper jamming is detected,
"PAPER JAM" is displayed on the LCD panel, and the machine stops printing operation. The display is
cleared by removing the cause of paper jam and pressing the STOP key or by restarting printing.
Sequence of Operation
440327
Paper ejection JAM
sensor(Photo-emitting)
P-roller sensor
Master set/removal position sensor
Paper ejection JAM
sensor(Photo-receiving)
Drum stop/JAM detection position sensor
Drum stop/JAM detection position sensor
Master set/removal position sensor
P-roller sensor
Paper ejection JAM sensor
Drum stop position sensor
JAM detection
position sensor
Drum stop
Drum stopJAM
A4 B4 A3
A4 LG B4
DP-440 / DP-430
DP-340 / DP-330
Bottom end of paper
Sensor photointerrupted
Sensor photopassing
JAM
A4 B4 A3
A4 LG B4
A4 B4 A3
A4 LG B4
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