Xerox 3050 Service Manual page 80

C4.01/ C4.34 Sheet Feed RAP
The status code C4
is
displayed when the
logic detects that there is a sheet feed
problem. The Sheet Feed Sensor is actuated
when sheet media is inserted Into the copier.
The logic detects a change in the state of the
Sheet Feed Sensor signal.
C4.01 lndicates that the logic detected
that:
(a) the sheet media i s blocking the
Sheet Feed Sensor at Power On.
The sensor signal is HlGH when the
Power On (1) switch was pressed.
(b) during the run mode, the sheet
media was inserted into the copier
when the copier was in
the
auto roll
feed mode of operation. The Sheet
Feed Sensor signal was HlGH
as
the
copier began feeding the media
from one of the supply rolls.
C4.34
lndicates that the logic detected
that the sheet media was removed
from the copier when the copier
was feeding the sheet media from
the registration position to the
drum. The Sheet Feed Sensor
changed state from HlGH to LOW a s
the sheet was being fed.
The problem may occur if there i s a problem
with the Media Transport mechanical
components, the Transport Drive Motor, or
the motor control circuitry.
Initial Actions
WARNING
The Fuser Heat Roll may be hot. Be careful
and do not touch the roll while performing
this procedure.
Lower the Sheet Feed-in Shelf. Check
the Media Transport for a sheet
media jam. Remove any obstructions
in the sheet media path.
Check the actuator of the Sheet Feed
Sensor for binding or damage.
Check the Media Transport connector
(A21
PI
J1)
for damage and ensure
that the connector and pins are seated
correctly.
Ensure that the Control PWB
connector for the Sheet Feed Sensor
(A3 P305) i s not damaged and ensure
that the connector and pins are seated
correctly.
Procedure
Enter the code [0801] to check the Sheet
Feed Sensor. The Control Panel display
indicates a (01) when the sensor is actuated.
With the Sheet Feed-in Tray in the lowered
position, place a clean sheet of media into
the Media Transport in order to actuate the
Sheet Feed Sensor.
The display changes from
(00)
to (01) when
the sensor
is
actuated.
Go to FLAG 1 and check for an open
circuit or
a
short circuit to ground in the
wires to the Sheet Feed Sensor.
If there is no open or short circuit,
replace the Sheet Feed Sensor
(42).
If the problem persists, replace the
Control
PWB (A3).
Go to the
8.1
Media Transport
RAP.
The problem may occur if the sheet media is
not in good condition.
C4.01lC4.34 Sheet
Feed RAP
2-36 3050