Okidata Microline 520 Service Handbook
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Brand: OKIDATA
Category: Printer
Type: Service handbook
Model: OKIDATA Microline 520 , OKIDATA Microline 521
Pages: 321
2.2.06 Paper Detection Mechanism
Top Feed Paper Detection
When cut sheet paper is inserted into the printer, Point A of the Rear/Top Paper Feed Lever
is pushed backward, causing the Sensor Lever to rotate.
As the Sensor Lever rotates, it contacts the Rear Sensor Lever. This makes the Rear Sensor
Lever rotate.
The Rear Sensor Lever rotates, unblocking the Rear / Top Paper End Sensor (SNS1).
Rear Feed Detection
When paper is fed from the Rear Push Tractor, Point B is pushed backward. This makes the
Sensor Lever rotate.
As the Sensor Lever rotates, it contacts the Rear Sensor Lever. This makes the Rear Sensor
Lever rotate.
The Rear Sensor Lever rotates, unblocking the Rear / Top Paper End Sensor (SNS1).
Bottom Feed Detection
When the paper is fed from the bottom of the printer, Point C is pushed, rotating the Bottom
Paper End Lever.
As the Bottom Paper End Lever
rotates, it contacts the Bottom
Sensor Lever. This makes the
Bottom Sensor Lever rotate.
The Bottom Sensor Lever
rotates, unblocking the Bottom
Paper End Sensor (SNS2).
NOTE:
The method for detecting a
paper-end condition is the
reverse of the above.
PAPER-END is detected
when the Bottom Paper End
Sensor (SNS2) is blocked.
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Principles of Operation 2 - 34 Microline 520/521 Service Handbook
P/N 59257803