Xerox 3050 Service Manual page 111

4.1 Druml Developer Drive
Motor (MOT 21)
(W/ 0 Tag/ MOD 28) RAP
This RAP
is
used for problems with the
Drum/ Developer Drive Motor (MOT
21)
on
copiers equipped with
TWO AC
Drive
Motors. Copiers equipped with two AC Drive
Motors are identified as Without Tag/ MOD
28, (WI
0
Tag1 MOD 28).
On copiers equipped with ONE
AC
Drive
Motor use the
(4.3
Main Drive Motor MOT
21
(WI Tag/ MOD 28)) RAP.
The fault may or may not be indicated by a
status code. The problem may occur if there
is a fault i n the Drum/ Developer 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 Drum/ Developer Drive
Motor connector (M21
PI J1)
for
damage and ensure that the
connector is seated correctly.
Check that the Druml Developer Drive
Gears are i n good condition and are
engaged correctly.
Check that the Developer Drive
Coupling is in good condition and is
engaged fully.
Procedure
CAUTION: In order to prevent damage to
the copier, the Fuser Heat Roll must be at the
run temperature before the Drum1
Developer Drive and Fuser Drive Motors are
switched on.
NOTE: 1 . The
code I10041 may be timed out
and switched off after the Heat Roll reaches
the run temperature. The Start button must
be pressed, in order to reenter the code
[10041.
2. If the message, "FUSER CAN NOT BE
TURNED ON, CONDITION
XX
" , is displayed
when the code [I0041 is entered, refer to the
Special Tests [I0041 located in Section 6.
Enter the code [I0041 i n order t o energize
the Fuser Heat Rod and increase the Fuser
Heat Roll temperature t o the run
temperature. The message, "1004 FUSER
TEMP TEST TEMP
XXX
CELSIUS,
XXX
FAHRENHEIT", i s 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.
Wlth the Fuser Roll at the run temperature,
the Drum/ Developer Drlve Motor Is
switched on.
v
N
I
There is ACH between pins PI and P2 of
the Druml Developer Drlve Motor
connector (M21).
1 ' "
A B C
Connect the
( 0 )
probe t o the AC
GROUND at
E l
of the Power Cord
terminal. Connect the
(
+
)
probe t o
the
2B
terminal of the Fuser Power
Relay
(KZ).
There Is ACH between 2B and El.
There may be an open circuit in
the ACH wire between the Fuser
Power Relay (K2) and the Main
Power Relay (K1). Go to the 1.1
AC
POWER RAP and check the
ACH wire for an open circuit in
the wire. Repair the wires as
required.
Switch 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 is
+
26VDC at A2 P212 pin
8
of
the LVPSl DRIVER PWB.
There is
+
26VDC at A2 P212 pin
7 of the LVPS/ DRIVER PWB.
- -
4/96
3050
2-159
4.1 DrumlDeveloper Drive Motor (WIO TaglMOD28) RAP