DUPLO SEIKO CORPORATION Duprinter DP-330, Service Manual

Page: 88 / 330

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