Epson LQ-1050 Technical Manual page 107

Release/Friction (R/F) Sensor
Detection System:
Signal Status:
Paper Release Lever Position
Forward (release)
Backward (friction)
Circuit:
Mechanical switch
See Table 2-26.
Table 2-26. R/F Sensor Signal Status
See Figure 2-69.
+5
Fig. 2-69. F/T Sensor Circuit
2-66
PB6 (15 pin) of CPU
Low
High