DUPLO SEIKO CORPORATION Duprinter DP-330, Service Manual

Page: 78 / 330

77
c
Paper Feed Section
chap.2
¡
When there is no paper :
¡
When there is paper placed :
(5) Paper Sensor
Description
Circuits
Operation
Senses presence/absence of paper in the feed tray. When the paper in the tray runs out, the message "ADD
PAPER" is displayed and printing stops.
When there is no paper, the sensor is in the state of photopassing(open). When paper is placed inside, the
sensor is in the state of photointerrupting(close). When an absence of paper is detected, the message "ADD
PAPER" is displayed on the LCD panel.
2
When absence of paper is sensed, platemaking, printing and test printing are not possible.
2
If the paper runs out during printing, "ADD PAPER" is displayed on the LCD panel, printing is stopped,
and the feed tray descends to its lower limit position.
2
If the paper runs out during platemaking, operation continues until the end of the platemaking process,
then operation stops (without proceeding to the printing process), and the feed tray descends to its lower
limit position.
Paper sensor
paper present : CLOSE
paper absent : OPEN
Red
Blue
CN4-25 1
2
3
6
7
8
-27
Purple
Red
Blue
Purple -26
5V
5V
5V
0
M a i n P C B u n i t
Photopassing :0V
Photointerrupting:5V
440313
440W18e
Photointerrupting
Photopassing
Paper
Paper sensor