Paper End Sensor - Epson LX-HOO Technical Manual

REV.-B

2.4.6.1 Paper End Sensor

The paper end sensor detects whether paper is present or not. Figure 2-23 shows the paper end sensor
circuit.
When the paper runs out (of the detection area), the reed switch closes, and port PA5 of the CPU goes
LOW. The paper end detector is checked each time the phase is switched. The firmware controls the
following three operations:
When a paper end is detected during printing, firmware stops printing and sets the printer OFF LINE.
When a paper end is detected during initialization, firmware sets the printer OFF LINE.
When the AUTO LOAD switch is pressed in the OFF LINE state: Firmware executes the auto loading
function (refer to Section 2.4.6.3) if paper is not already loaded or executes paper feeding (normally
one line) when the paper is loaded.
If the paper is loaded or ejected by pressing the FF or LF switch without executing printing, the printer
is not placed OFF LINE due to paper end detection.
Frame (L)
CN6
2
Fig. 2-23. Paper End Sensor Circuit
Paper
I
62.5mm
Fig. 2-24. Paper End Detection Area
+ 5
R4
5.6K
288mm
2-28
(26)
Approx. 50mrn
Frame (R)