Xerox 3050 Service Manual page 129

5.1 Document Handler RAP
This RAP i s used for Document Handler
problems that may or may not indicate a
status code.
The problem may occur i f there is a problem
with the document sensors, mechanical
components, the drive motor, the motor
control ckcuitry or poor quality documents.
NOTE:
The component locator drawings and
the circuit diagram are on the next three
pages.
Initial Actions
Ensure that the documen
condition.
t
i s in good
Check that the Upper Document
Handler is positioned correctly.
Check the document path for
obstructions and the top and bottom
platens for damage and for correct
installation.
Check that the copier has Tag1 MOD
02 installed (Document Sensor
-
0
Rings).
Check that the actuators of the
Document Sensors are not binding or
damaged.
Check each Document Sensor to
ensure that the
0
Rings are
positioned correctly.
Check that the Document Sensor
connectors are seated fully and are
not damaged.
Check the Document Drive Belt and
Pulleys for damage and for the
correct installation.
Check the Document Drive Motor for
binding by rotating the Document
Drive Pulleys manually.
Check the connectors for the
Document Drive Motor (A31 PZ),
Drive Motor PWB (A31 Pi) and
Control
PWB (A3
P302) for damage.
Ensure that the connectors and pins
are seated correctly.
Ensure that the document meets the
size specification.
Remove the Upper Document
Handler Assembly. Check the
document drive rolls, pinch rolls, the
roll load springs, and the feed shelf
for contamination or damage. Clean
or replace the components as
required.
Procedure
Cheat the Document Handler Interlock
Switch (S30).
Enter the code [0601=BOND] in order to check
that the Document Drive Motor drives i n the
scan direction. Then, enter the code (0601-21
in order t o check that the Document Drive
Motor drives in the rescan direction.
The Feed Drive Roll rotates in both directions.
Press the Power Off (0) switch. Go to
FLAG 1
and check for an open circuit i n
the wires to the Drive Motor PWB.
'
The check Is good.
I
Repair or replace the wires as
required.
Disconnect the Document Drive Motor
connector (A31 P2) from the Drive Motor
PWB. Set the Multimeter
(600T1616)
to
ohms,
DC,
+,
200 ohms.
Check the
,
resistance of the motor, refer to Note 2.
The check
i s
good.
A B C
101
92
3050 2-1 71
5.1 Document Handler RAP