Sub Heater On Time - Xerox DocuColor 2240 Service Manual

10-356 Sub Heater On Time

The Sub Heater remained on for more than the specified time.
Initial Actions
Turn off the power, remove the Fuser Assembly, and allow it to cool down.
Procedure
Measure the resistance between P600-7 and P600-9 on the Fuser Assembly
resistance is between 30K and 190K Ohms.
Y N
Check the wiring from P600 to P/J212
OK, replace the Sensor Assembly
Measure the resistance between P600-3 and P600-12 on the Fuser Assembly
The resistance is 20 Ohms or less.
Y N
Replace the Fuser Assembly (PL 7.1).
Reinstall the Fuser Assembly, turn the power ON. Enter
between 678 and 699.
Y N
Turn the power off. Refer to Figure 1
open circuit or poor contact. If the check is OK, replace the MCU PWB
NOTE: All voltage measurements mentioned below this point must be made while the
Fuser is warming up.
Remove the Rear Cover (REP 14.2) and the cover over the 24V LVPS (3 screws). AC
Voltage is measured at FS47 on the AC Drive PWB
Y N
+2 - 3.5VDC is measured at P/J404-7 on the MCU PWB
Y N
Check the wires and connectors. If the check is OK, replace the MCU PWB
13.1).
+24VDC is measured at P/J404-9 on the MCU PWB
Y N
Check the wires and connectors. If the check is OK, replace the MCU PWB
13.1).
Check wiring from P/J404 to P/J590
replace the AC Drive PWB (PL 9.2).
Check the wires and connectors. If the check is OK, replace the Fuser Assembly
Initial issue
DC 3535/2240/1632
(Figure
for an open circuit and poor contact. If the check is
(PL 7.2).
dC140 [010-101]. The display is
and check the wiring from P/J404
(PL
(PL 9.2).
(PL 13.1).
(PL 13.1).
for an open circuit or poor contact. If the check is OK,
1). The
(Figure 2).
Figure 1 10-356 RAP Circuit Diagram - Rear Thermistor
to J600 for an
13.1).
Line
(PL
(PL
(PL 7.1).
02/03
2-229
Status Indicator RAPs
10-356