Epson LX-300 Service Manual

Operating Principles
LX-300 Service
Mhnual
2.3.4 Paper End Sensor Circuit
This printer has a comector switch for sensing the paper end. me system IC receives a signal
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(HIGH or LOW) from the connector switch and recognizs a paper end. The comector switch is
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closed (LOW) when there is no paper on the platen and is open (HIGH) when paper is present.
SYSTEM IC
(ICI)
PB2
+5V
t
R74
+
PE Sensor
4
R72
J’
End Sensor Circuit Diagram
Figure 2-15. Paper
2.3.5 Release Lever Position Sensor Circuit
This printer has a comector switch to detect the type of paper handling. The system IC receives a
HIGH or LOW signal from the comector switch to indicate whether the paper is fed using friction
feed or push tractor feed. Thecomector switch is closed (LOW) when friction feed is selected and
is open ~HIGH) when push tractor feed is selected.
SYSTEM IC
(lCl)
A NO
+5V
R53
Release Sensor
58
R54
J-’
Figure 2-16. Release Lever Position Sensor Circuit Diagram
2-14
Flev.A

Epson LX-300 Specifications

General

Print Method	9-pin impact dot matrix
Interface	Parallel
Paper Handling	Friction feed, tractor feed
Weight	4.4 kg
Operating Environment	Temperature: 5 - 35°C, Humidity: 10 - 80%