Xerox 3050 Service Manual page 146

7.3 Roll 3 Feed
RAP
Thi s
RAP
is
used for Roll 3 feed problems that
may or may not indicate a status code.
The problem may occur i f there is a problem
with the Roll 3 drive mechanical
components, the Roll Drive Motor or the
motor control circuitry.
NOTE: The component locator drawings and
the circuit diagram are on the next five
pages.
Initial Actions
Check that the media is in good
condition and is loaded correctly.
Check the Upper Feed Baffle that
houses the Feed Pinch Rolls is latched
in the correct position.
Check the media path for
obstructions.
Check the Roll Drive Motor, drive
chain and sprockets for binding by
rotating the Feed Drive Sprocket
manually. The sprocket will drive the
Media Drive Chain, which will rotate
the motor and sprockets.
Pull out the Drawer 3. Check the Feed
Drive Rolls, Feed Pinch Rolls, and Roll
Load Springs for contamination or
damage and correct installation.
Clean or replace as required.
Check the Rewind Gears, Roll Arbors,
and Arbor Support Rolls for binding or
damage.
Check the connectors for the Roll
Drive Motor (A7 PZ),
Drive Motor
PWB (A7 P I ) and Control PWB (A3
P308) for damage. Ensure that the
connectors are seated correctly.
Ensure that the customer is running
media that meet the type
specification.
Ensure that the customer
is
running
media that meet the size specification.
With the copier in the Power Saver
Mode, check that the media heater i s
warm.
Procedure
NOTE: In order to prevent a media jam,
ensure to remove the media from the Feed
Drive and Pinch RoNs.
Remove the Roll
3
Media from the Feed
Drive and Pinch Rolls. Cheat the Front Covers
Interlocks. Enter the code (07184OND] in
order to check the Roll Drive Motor and the
Roll 3 Feed Clutch.
The Feed Drive Roll rotates.
The Roll Drive Motor
is
energized.
Y
N
Go to FLAG 1 and check for an open
circuit in the wires to the Drive
Motor PWB.
If the check is good, press the Power
Off
(0)
switch. Disconnect the drive
motor connector (A7 P2). Set the
Multimeter (600T1616) to ohms, DC,
*,
200 ohms. Check the resistance
of the motor, refer to Note 2.
If the check is good, set the
Multimeter to V , DC,
+,
200V.
Connect the
(-)
lead to the GND point
on the LVPSI DRIVER (A2) PWB.
Measure the voltages at the Motor
PWB connector (A7 PI). Refer to
Note 1 for voltages at pinsA7 P1-8,7,
6 and 4.
If the check is good, replace the A7
Drive Motor PWB. If the check is no
good, replace the A3 Control PWB.
There is
+
26 VDC at pin 4 of A2 P209 of
the
LVPSI Driver PWB.
A B C
101 92
7.3 Roll 3 Feed RAP
2-1 88 3050