Xerox 3050 Service Manual page 78

C3.05 Media Feed RAP
CONTROL PWB (A3)
The status code C3.05 is displayed when the
logic detects that there is a Roll 3 media feed
problem. As media
is
fed from Roll 3 or
rewound onto Roll 3; the roll rotates,
causing the Roll
3
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 3 Motion
Sensor signal.
C3.05 Indicates that no motion i s detected
by the logic from the Roll 3 Motion
Sensor. The sensor signal does not
continuously change state from a
HIGH to
LOW
as the media is being
fed or rewound.
The problem may occur if there is 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.
Check the connectors for the Roll 3
Motion Sensor (Q6 P I ) and the Control
PWB (A3 P309) for damage and ensure
that they are seated correctly.
Procedure
/
Enter the code (07121 in order to check the
Roll 3 Motion Sensor. The Control Panel will
alternately display a (01) and a (00) when the
roll is rotated.
Slowly rotate the Roll 3.
If the display alternately changes from (00)
to (01) when the roll is rotated, go to the 7.3
Roll 3 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
JI11 JIIO J,O(
I
J10(
1 1 1 - U
u
1
-
* 3 2 ' i
the Roll
3
Motion Sensor and the Control
PWB for an open circuit or a short circuit to
ground.
If there is no open circuit or short circuit,
A3
P309
)
1590
replace the Roll 3 Motion Sensor (Q6).
If the problem persists, replace the Control
PWB (A3).
101 92
C3.05 Media Feed RAP
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