Xerox 3050 Service Manual page 84

C4.24 Sheet Feed RAP
The status code C4.24 is displayed when the
logic detected that there is a sheet feed
problem. The Sheet Feed Sensor is actuated
when sheet media is inserted into the copier.
As
the sheet
media moves through
the
Media Transport, the Media Registration
Sensor is alternately blocked and cleared,
causing the sensor signal to change state.
The logic detects a change in the state of
both the Sheet Feed Sensor and the Media
Registration Sensor signals.
C4.24
Indicates that the logic detected
that sheet media was inserted into
the copier and the media did not
reach the Media Registration
Sensor in the allowed time period.
The Sheet Feed Sensor signal was
HIGH and the Media Registration
Sensor remained HIGH for too long
a time period after the Sheet Feed
Sensor signal went HIGH.
The problem may occur if the sheet media is
not in good condition.
The problem may occur if there is 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 and the
Latching Cover. Check the Media
Transport for a media /am. Remove
any obstructions in the sheet media
path.
Clean the Media Registration Sensor
by wiping the face of the sensor with a
clean, dry cloth.
Raise
the Latching Cover and 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) is not damaged and ensure
that the connector and pins are seated
correctly.
Procedure
Enter the code
[08031
in order to check the
Media Registration Sensor. The Control
Panel display indicates a
(00)
when the
sensor is actuated.
With the Sheet Feed-in Tray and the Latching
Cover in the lowered position, place a clean
strip of bond media over the Media
Registration Sensor.
The display changes from (01) to (00) when
the sensor is covered.
Go to FLAG 1 and check for an open
circuit or a short circuit to ground in the
wires to the Media Registration Sensor.
If there is no open or short circuit,
replace the Media Registration Sensor
(Q1).
If the problem persists, replace the
Control
PWB (A3).
Enter the code
(08011
in order to check the
Sheet Feed Sensor. The Control Panel display
indicates a (01)
when the sensor is actuated.
Move the Latching Cover to the raised
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.
Y N
C4.24 Sheet Feed RAP