Xerox 3050 Service Manual page 271

LL.4ItLL.45 Fuser Warmup Fault
RAP
(61 1/92)
This RAP
i s
used when the Fuser does not
warm up when the control logic attempts to
increase the heat.
LL.41 is displayed when the Fuser heat does
not increase to 1100 F (430
C)
within one
minute.
LL.45 is displayed when the Fuser
temperature is greater than 1100
F
(430
C)
but does not reach the setpoint temperature
within the specified time period.
Initial Actions
Ensure that the following connectors are
properly seated:
A23 P/J1 near the Heat Rod
HR1 P1 and HR1 P 2 on the Fuser Heat Rod
A2 P212 on the
LVPSI
Driver
PWB
(A2)
A23 AlPl on the Thermal Controller PWB
A2312 inside the Left Side Door.
0
A3P306 on the Controller
PWB ( A 3
Check theat the Fuser Temperature i s
I
correct (AD, 10.1).
WARNING
Dangerous Voltage.
I NOTE:
After entering the code [10.04], the
Fuser Power Relay (K2) and CR25 are
energized for only five minute.
Switch on the copier. Enter the diagnostic
code
110041
to test the operation of the
Fuser.
After 10 seconds, the Fuser Heat Rod is still
on.
Y
N
A B
B
Switch off the copier, and disconnect the
Power Cord. Set the DMM to read 30
ohms. Disconnect A23PIJ1. Connect the
( + ) lead to
A23J1-3.
Connect the (-) lead
toA23J1-1.
The resistance Is less than
30
ohms.
Y N
Go to
FLAG 7
and check the wires for
continuity.
The wires
have
continuity.
V N
I
Repair the wirer.
Replace the Heat Rod.
Disconnect the leads, and connect
A23P/J1. Set the DMM to read ACH. Go
to FLAG
1
and connect the leads. Cheat
the Right Side Door Interlock. Connect
the Power Cord and switch on the copier.
Wait
10 seconds.
ACH
i s present.
Y N
Go to FLAG
2.
ACH
is present.
Y N
1
Repair the wires.
Set the
DMM
to read
26 VDC. G
FLAG
3.
Switch off, then switch on,
the copier.
26 VDC
is present.
C D E F
Connect the (
+
)
lead to A2P2 12- I.
Connect the
(-)
lead to A2P212-3.
Switch off, thenswitch on, the
copier.
26 VDC
Is present.
Y N
I
Replace the LVPSlDriver PWB
M3).
Repair the wires.
?place the Fuser Power Relay (K2).
Connect the
(
+
)
lead to A23P1-3. Connect
the
(-)
lead to Relay
K2,
pin
8.
Switch off,
then switch on, the copier.
: H is present.
N
Repair the wire between A23P1-3 and
pin 4 on the Fuser Power Relay (KZ).
GO
to
FLAG 8
and check the wires for
continuity.
The wires have continuity.
I
Repair the wires.
Go to FLAG
9
and'check the wires for
continuity.
The wires have continuity.
Y N
I
Repair the wires.
8/94
2-75
LL.41,L1.45 Fuser Warmup Fault RAP