Xerox 3050 Service Manual page 74

C2.05 Media Feed RAP
CONTROL PWB (A3)
i '
The status code C2 is displayed when the
logic detects that there is a Roll
2
media feed
problem. As media is fed from Roll 2 or
rewound onto Roll 2; the roll rotates,
causing the Roll 2 Motion Sensor to be
alternately blocked and not blocked by the
rotating encoder disk. The logic detects
a
change in the state of the Roll 2 Motion
Sensor signal.
C2.05 Indicates that no motion is detected
by the logic from the Roll
2
Motion
Sensor. The sensor signal did not
continuously change state from
a
HIGH to
LOW
a s the media is being
fed or rewound.
The problem may occur if there i s a problem
with the roll drive motor or the motor
control circuitry.
Initial Actions
Open the front and the left side doors.
Check the motion sensor and encoder
disk for binding or damage by
rotating the Roll
1
in the forward and
reverse directions.
Procedure
I
Enter the code (0711) in order to check the
Roll 2 Motion Sensor. The Control Panel will
alternately display a (01) and
a
(00) when the
roll is rotated.
Slowly rotate the Roll 2.
If the display alternately change from (00) to
(01)
when the roll i s rotated, go to the 7.2
Roll
2
Feed RAP.
If the display does not change from
(00)
to
(01) when the roll is rotated, continue with
this procedure.
CONTROL PWR
Go to
FLAG 1
and check the wiring between
1
a c r
& "
*$r&
the Roll 2 Motion Sensor and the Control
I
PWB for an open circuit or a short circuit to
ground.
If there is no open circuit or short circuit,
replace the Roll
2
Motion Sensor
(QS).
If the problem persists, replace the Control
PWEl (A3).
Check the connectors for the Roll 2
Motion Sensor (Q5
Pl)
and the Control
PW8 (A3 P309) for damage and ensure
that they are seated correctly.