DUPLO SEIKO CORPORATION Duprinter DP-330, Service Manual

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v
Drum Driving Section
chap.2
440322
Drum position cam
(1) Drum Stop / JAM Detect Position
Sensor
2. Function of Parts
The drum stop / JAM detect position sensor detects the drum stop position and JAM detect position.
2
The drum stop position is the position where the drum stops at the same time when a beep sounds after the
JOG switch (drum rotation switch) is kept pressing.
2
The JAM detection position is the timing to check paper jamming in the paper ejection section.
2
Paper jamming in the paper ejection section is checked in the above timing with the jam sensor (photo-
receiving) and P-roll sensor.
Operation
The drum stop / JAM detect position sensor is positioned while the drum is rotating as follows:-
2
The drum stop position is detected with the edge of photointerrupting
/
photopassing.
2
The JAM detect position is detected with the edge of
photopassing
/
photointerrupting.
Drum stop/JAM detect position sensor(P5)
Red
Blue
CN17-6 1
2
3 -8
Yellow -7
5V
5V
5V
0
M a i n P C B u n i t
Photopassing :0V
Photointerrupting:5V
Circuit
440W19e
Drum stop/JAM detect
position sensor
JAM detect
position
JAM detect
position
Drum stop
position
Drum stop
position
Drum stop/JAM detect
position edge
Drum stop/JAM detect
position sensor
JAM detect position edge