Lexmark Jetprinter 4079-00 series, Руководство по обслуживанию

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Diagnostic Information
2-33
4079-00X
When paper is in the printer beyond the start position of Test
Print A, or above the ejector rollers, but not beyond the platen. Step 5
FRU Action
1 • Paper Out
Sensor
• Paper Out
photo sensor
Cable
• Ribbon Cable
• Logic Board
Remove any paper that may be in the machine.
Observe the paper-out sensor arm from the rear of
the machine under the paperfeed roll. Be sure the
paper sensor arm operates smoothly, blocking the
light path of the paper-out sensor when there is no
paper in the paper path. If the light is blocked by a
foreign object, remove the object and check the
operation of the sensor arm and sensor holder.
If the light path is all right, check the paper-out volt-
age between pin 1 and ground on the CNPE con-
nector on the right connector card, with the
connector plugged in.
The voltage should be high (4 - 5 V dc) when the
paper sensor arm blocks the light path of the paper-
out sensor, and low (>2 V dc) when the light path is
not blocked. If the voltage is correct, replace the
logic board. If you replace the logic board, go to the
“Service Adjustment Mode” on page 4-4 and per-
form the print position adjustment, and the direction
offset adjustment.
If the voltage is not correct, check the continuity of
the paper sensor cable by matching wire colors.
Also check the continuity of the ribbon cables.
Replace the cable if necessary. If this does not fix
the problem, replace the paper-out sensor.
Error Code Appears Go To