Star Micronics TSP200 technical manual Detectors, Paper-Out Detector

PRINCIPLES OF OPERATION

3-3. Detectors

1Paper-Out Detector

The paper-out detector (reflective photosensor) is located at the paper entry slit. The photosensor’s phototransistor remains ON while paper is present. It goes OFF when paper runs out, generating output of a paper-out signal.

IC1

CPU

P45

CN2

+5V

+5V

Paper

Photosensor

4

– +

5

+5V

3

Fig. 2-18 Paper-Out Detector

2Paper-Near-End Detector

The near-end detector is mounted in the paper-roll holder.

IC1	CN3
CPU
+5V	2
	+5V
P47	1

Paper-roll

3

Fig. 2-19 Paper-Near-End Detector

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