Star Micronics LC-1011C Technical Manual page 28

THEORY OF OPERATION
(3) Paper end Detector
The paper end Detector is located in the paper chute unit. The A/D converter in the CPU detects the presence or
absence of paper.
(4) Release lever, Bail lever switch
Detecting
signal
V +5V
ref
+5V
R2
AN
C1
CPU
Fig. 2-7 Paper end detector circuit
Control Method
A/D Converte
AN Voltage
POINT
0-128 0.00-2.50
128-255 2.50-5.00
R1
Fig. 2-8 Release lever switch circuit
Control Method
Output
(V)
0
5
R1
R3
Detection
V
No paper
Paper present
+5V
R2
Leaf switch
Release
Lever SW
Tractor
Friction
– 24 –
Paper