Xerox ColorQube 9303 Series Service Manual page 463

93-538-00 to 93-540-00, 93-959-00 Lower Umbilical Thermal
Error RAP
93-538-00 Lower umbilical heater is too hot
93-539-00 Lower umbilical is heating too slowly
93-540-00 Lower umbilical thermistor is faulty
93-959-00 Lower Umbilical heater went unstable while printing
Procedure
WARNING
Ensure that the electricity to the machine is switched off while performing tasks that do
not need electricity. Refer to GP 14. Disconnect the power cord. Electricity can cause
death or injury. Moving parts can cause injury.
Enter dC335 Heater Monitor and Exerciser. Select Graph to run the Lower Umbilical Test.
The test is good.
Y N
Check the PEST fault history, dC123
and ink melt reservoir). All marking unit heaters have failed.
Y N
Go to WD 9.8 and WD 9.10. Check the following wiring:
• Between PJ303 on the Marking Unit Driver PWB
mistor. Measure the resistance between PJ303 pins B4 and B5. The resistance
is widely variable, but must not be an open circuit.
• Between PJ701 on the Marking Unit Heater PWB
heater. Measure the resistance between PJ701 pins 1 and 8. The resistance
should be approximately 80-100 ohms.
Refer to:
• 01A AC Power Distribution RAP.
• 01B +3.3V ESTAR Distribution RAP.
• 01L 0V Distribution RAP
Install new components as necessary.
• Lower umbilical, PL 91.25 Item
• Marking unit driver PWB, PL 92.10 Item
• Marking unit heater PWB,
Refer to WD 1.1 and WD 9.8, check the wiring between PJ4AC on the
and PJ101 on the Marking Unit Heater
Y N
Repair the wiring, REP 1.1.
Check the +3.3V ESTAR distribution to the marking unit heater PWB, refer to the
+3.3V ESTAR Distribution RAP. If the fault is still present, install new components as nec-
essary:
• Power supply unit, PL 1.15 Item
• Marking unit heater PWB cable,
• Marking unit heater PWB, PL 92.10 Item
• Marking unit driver PWB, PL 92.10 Item
A
ColorQube® 9303 Family
for marking unit heater faults (umbilicals, printheads
and the lower umbilical ther-
and the lower umbilical
10.
4.
PL 92.10 Item 5.
Power Supply Unit
PWB. The wiring is good.
2.
PL 92.10 Item 12.
5.
4.
A
Check that the marking unit fan is running,
Y N
Go to WD 9.4. Check the marking unit fan.
Refer to:
• OF 6 Fans and Air Systems RAP
• GP 10, How to Check a Motor.
• PJ901, Drum Driver PWB.
• 01E +12V Distribution RAP.
• 01L 0V Distribution RAP
Install new components as necessary:
• Marking unit fan, PL 1.15 Item
• Drum driver PWB, PL 1.15 Item
The fault may be intermittent. Go to
between:
• The marker unit driver PWB and the lower umbilical thermistor.
• The marking unit heater PWB and the lower umbilical heater.
Refer to:
• PJ303, Marking unit driver PWB
• PJ701, Marking unit heater PWB
If the fault persists, install new components as necessary.
• Power supply unit, PL 1.15 Item
• Lower umbilical, PL 91.25 Item
• Marking unit driver PWB, PL 92.10 Item 4
• Marking unit heater PWB,
01B
Figure 1 Component Location
February 2013
2-439
Figure 1. The fan is running.
23.
4.
WD 9.8 and WD 9.10. Check for loose connections
2.
10.
PL 92.10 Item 5
Marking Unit Fan
Status Indicator RAPs
93-538-00 to 93-540-00, 93-959-00