87
b
Press Section
chap.2
(1) P- roll Sensor
The P- roll sensor detects up and down of the press roller.
The press roller only ascends when the paper is fed from the paper feed section by the cancel lever.
The P- roll sensor also is used to know whether the paper is fed.
Operation
The P- roll sensor position varies depending on the press roller position as follows:-
• When the press roller is OFF (DOWN) :
photointerrupting
• When the press roller is ON (UP) :
photopassing
P-roll sensor(PS8)
M a i n P C B u n i t
Red
Blue
CN17-15
1
2
3
-17
Light blue
-16
5V
5V
5V
0
Photopassing :0V
Photointerrupting:5V
Circuit
2. Function of Parts
440W23e
Press roller : OFF
Press roller : ON
Cam
Press roller
Press lever
440309
P-roll sensor
Cancel lever
Signal solenoid
Содержание Duprinter DP-330
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