Lexmark Jetprinter 4079-00 series, Руководство по обслуживанию

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2-16
4079-00X
If the symptom remains, replace the logic board. If you replace the
logic board, go to the
“Service Adjustment Mode” on page 4-4 and
perform the print position adjustment, and the direction offset adjust-
ment.
2 Paper Out
Photo Sensor
Paper Out
Photo Sensor
Cable
Check the paper sensor signal at CNPE pin 1 on the
right connector card, with the card plugged in.
You can manually feed paper to check this signal.
Push the paper lift spring clutch plate (Asm.20-10) to
the right, and turn the rear ejector roller (Asm. 18-2).
The spring plate is under the carriage shaft to the
left of the carriage motor.
Voltage should be high (4-5 V dc) when the paper
sensor arm blocks the light path (paper is not
present).
Voltage should be low (<2 V dc) when the paper
sensor arm does not block the light path (paper is
present).
If the voltage is not correct, remove the card cover
(asm. 4-8), then adjust the paper out photo sensor
holder mounting screw so the sensor is as high in its
slot as possible. Check the voltages again. If the
voltages are still not correct, replace the paper out
photo sensor or the paper out photo sensor cable as
needed.
FRU Action