October 2012
2-65
ColorQube 8570/8870 Service Manual
94,626
Fault Messages and Codes
Xerox Internal Use Only - Revised, 3rd Revision
94,626 Drum Thermal Fault
A Drum Heater error has occurred. The following troubleshooting procedure applies to this
error.
Initial Actions
•
Reboot the printer and verify the error persists.
•
Check the ambient room temperature.
•
Check the Fan operation and vents.
•
Check that the Drum Heater and Thermistor are plugged in.
•
If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts (Chapter 5 - Parts List)
•
Drum Assembly,
PL 2.1 Item 4
•
Drum Fan,
PL 4.1 Item 12
•
Electronics Module,
PL 5.1 Item 1
•
Drum Thermistor (Temperature Sensor),
PL 6.1 Item 5
Wiring and Plug/Jack References (Chapter 7 - Wiring Data)
•
Figure 1
, Right Side Wire Routing
•
Figure 8
, I/O Board, Sensors (1 of 2)
Procedure
Verify that the ambient temperature is within environmental specifications (room temperature)
(refer to
Environmental Specifications
in the Introduction and General Information Chapter). Is
the temperature within specifications?
Y
N
Advise customer of operational requirements.
Check resistance across the Drum Thermistor.
•
Check resistance on the wiring harness connector
P/J902
.
–
At Room Temperature: 280 kohms
–
At Operating Temperature: 50 kohms
Is it open or shorted?
Y
N
Check airflow at the vents. Is there adequate clearance, and are the vents clean?
Y
N
Clean the vents and/or advise customer of clearance requirements (refer to
Clear-
ance and Mounting Surface Specifications
in the Introduction and General Informa-
tion Chapter).
Check the Drum Fan for operational. Does the Drum Fan operate?
Y
N
Replace the Drum Fan (
REP 4.12
).
Turn off the AC switch. If the heaters immediately turn on and glow before the printer has
finished booting up, then a triac is stuck on. Are the Heater Coils glowing? (indicates
stuck triac in the Electronics Module)
Y
N
Replace the Drum Temperature Sensor (
REP 6.5
).
Replace the Electronics Module (
REP 5.1
).
Replace the Drum Temperature Sensor (
REP 6.5
) and or wiring cable.
Table 1 Applicable Fault Code
94,626
Drum Fan has been on too long.
A
A
B
B
Summary of Contents for COLORQUBE 8570
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