Epson AcuLaser C8500, Service Manual

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EPSON AcuLaser C8500 Revision C
Operating Principles 2-51
2.7.3 Paper Supply Unit Selection Control
If not controlled by the printer controller, the paper supply unit selected when
the power is turned ON is as follows:
NOTE: The paper at the bottom of the printer is referred to as “Cassette
1." The first level of the optional FEEDER UNIT is called “Cassette
2" and the second level “Cassette 3."
2.7.4 OHP Front/Back Detection Control
OHP white frame detection control is intended to prevent OHP film with white
frame from getting stuck on the HEAT ROLL. The Top and bottom ends of the
OHP film with white frame are detected by checking signal output of the OHP
SENSOR.
Figure 2-53. OHP Front/Back Detection Control
†
OHP White Frame Detection Movement
There is a notch of the transparency in a part of the white zone at the end
of the OHP paper with the white frame, and the signal level of two sensors
is more different, and it can be detected.
Table 2-3. Paper Supply Unit Selection Control
Priority
sequence
Selected paper supply
unit
Selection conditions
1st priority Cassette 1
When paper Cassette 1 is
mounted and there is paper in
the tray, or when there is no
paper in any of the paper supply
units.
2nd priority Cassette 2
When paper Cassette 2 is
mounted and there is paper in
the and 1 is not selected.
3rd priority Cassette 3
When paper Cassette 3 is
mounted and there is paper in
the and neither Cassette 1 nor
Cassette 2 is selected.
4th priority MSI Tray
When there is paper in the MSI
and neither Cassette 1,
Cassette 2, nor Cassette 3 is
selected.