Xerox 3050 Service Manual page 117

4.2 Fuser Drive Motor
(MOT 22)
(WI 0 Tag/ MOD 28) RAP
This RAP is used for problems with the Fuser
Drive Motor (MOT 22) on copiers equipped
with
TWO
AC Drive Motors. Copiers
equipped with two AC Drive Motors are
identified as Without Tag/ MOD 28, (W/ 0
Tag1 MOD 28).
On copiers equipped with ONE
AC
Drive
Motor use the (4.3 Main Drive Motor MOT 21
(W/ Tag/ MOD 28)) RAP.
The fault may or may not be indicated by a
status code. The problem may occur if there
is a problem with the Fuser Drive Motor, the
motor control circuitry or the mechanical
components.
NOTE: The component locator drawings and
the circuit diagram are on the next four
pages.
Initial Actions
A
WARNING
Dangerous Voltage is present on
the ACH wires and terminal
connectors.
Check the Fuser Drive Motor
connector (M22 P/ If) for damaged
and ensure that the connector i s
seated correctly.
Check that the Drive Belt that drives
the Fuser Heat Roll i s i n good
condition and i s positioned on the
drive pulleys correctly.
Procedure
CAUTION: In order to prevent damage to
the copier, the Fuser Heat Roll must be at the
run
temperature before the Druml
Developer Drive and Fuser Drive Motors are
switched on.
NOTE: 1. The code (1004) may be timed out
and
switched o f f after the Heat Roll reaches
the run temperature. The Start button must
be pressed,
in
order to reenter the code
[1004).
2. If the message, "FUSER CAN NOT BE
TURNED ON, CONDITION XX", is displayed
when the code (10041 is entered, refer to the
Special Tests (10041 located In Section 6.
Enter the code [I0041 in order t o energize
the Fuser Heat Rod and increase the Fuser
Heat Roll temperature to the run
temperature. The message, "1004 FUSER
TEMP TEST TEMP
=
XXX CELSIUS, XXX
FAHRENHEIT", is displayed when the Heat
Roll
is
at the run temperature. The Drum/
Developer Drive and the Fuser Drive Motors
are switched on, when the Fuser Roll is at the
run temperature.
With the Fuser Roll at the run temperature,
the Fuser Drive Motor is switched on.
There
is
ACH between
pins
P I and P2 of
the Fuser Drive Motor connector (M22).
Y N
A B C
Connect the (-) probe t o the AC
GROUND at El of the Power Cord
terminal. Connect the
(
+
)
probe
to
the
20
terminal of the Fuser Power
Relay (K2).
There
is
ACH between 28 and El.
Y N
There may be an open circuit in
the ACH wire between the Fuser
Power Relay (K2) and the Main
Power Relay (K1); Go t o the 1.1
AC POWER RAP and check the
ACH wire for an open circuit i n
the wire. Repair the wires as
required.
Swltch
Off (0) the copier power. Go
t o FLAG 1 and check the wiring for
an open circuit i n the wires. If there
is no open circuit, switch On (1) the
copier power.
There I s
+
26VDC at A2 P212 pin
10
.
of the LVPSI DRIVER
PWB.
O E F
N
There
is
+
26VOC at A2 P212 pin
9 of the LVPS/ DRIVER PWB.
Y N
G H
4/96
3050
2-165
4.2
Fuser Drive Motor (WIO Tag/ MOD28) RAP