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Service Guide
41
15,000: Drum thermals.
Drum thermal faults are determined by a thermistor in
contact with the drum surface. Ensure that there is adequate clearance for airflow (at
least 4 inches (10 cms.) on all sides) and that the room temperature is between 90
o
F
(35
o
C) and 50
o
F (10
o
C).
15,000.40:
TCD_THERMISTOR_
FAULT
The drum temperature is incorrect as sensed by the drum
thermistor. Ensure that there is adequate clearance for
airflow (at least 4 inches (10 cms.) on all sides) and that
the room temperature is within specification.
15,001.42:
TCD_THERMISTOR_
OPEN
The drum thermistor appears to be open. Replace the
drum-temperature sensor.
15,002.43:
TCD_THERMISTOR_
SHORT
The drum thermistor appears to be shorted. Replace the
drum-temperature sensor.
15,003.44:
TCD_THERMISTOR_
HOT
The drum heater is running away. Unplug the printer
NOW! Verify that the vent on the right side of the printer is
not blocked. Ensure that the drum fan rotates and is
installed correctly.
15,004.45:
TCD_THERMISTOR_
SLOW
The drum heater is not heating at all, or is not heating as
quickly as it should. Is the drum thermistor dirty? Is the
drum heater plugged in? Check the head-to-drum gap (if
the printhead is too close to the drum, it acts like a heat
sink, not allowing the drum to heat as quickly as it should.
Replace drum heater, followed by the power supply.
16,000: Preheater thermals.
Preheater thermal faults are determined by a thermistor
in contact with the preheater. Ensure that there is adequate clearance for airflow (at
least 4 inches (10 cms.) on all sides) and that the room temperature is below 90
o
F
(35
o
C).
16,000.40:
TCD_THERMISTOR_
FAULT
The preheater temperature is incorrect as sensed by the a
thermistor in the preheater. Ensure that there is adequate
clearance for airflow (at least 4 inches (10 cms.) on all
sides) and that the room temperature is correct.
16,001.43:
TCP_THERMISTOR_
OPEN
The preheater thermistor appears to be open. Check the
preheater cables on the right side of the printer. Replace
the paper preheater. Replace the power supply.
16,002.44:
TCP_THERMISTOR_
SHORT
The preheater thermistor appears to be shorted. Replace
the paper preheater.
16,003.45:
TCP_THERMISTOR_
HOT
The preheater heater is running away. Unplug the printer
NOW! Check the printhead cabling. Replace the
printhead.
16,004.46:
TCP_THERMISTOR_
SLOW
The preheater is not heating at all, or is not heating as
quickly as it should. Check for an open connection.
Replace the paper preheater. Replace the power supply.
Table 4 Front panel and fault history log error codes and messages
Error code
Meaning
Summary of Contents for Phaser 840
Page 11: ...xii Phaser 840 and 850 Color Printers ...
Page 65: ...54 Phaser 840 and 850 Color Printers ...
Page 101: ...90 Phaser 840 and 850 Color Printers ...
Page 125: ...114 Phaser 840 and 850 Color Printers ...
Page 134: ...Service Guide 123 Clearing PostScript NVRAM menu item ...
Page 135: ...124 Phaser 840 and 850 Color Printers ...
Page 166: ...Service Guide 155 Figure 1 Cabinet FRUs 7 5 6 8 1 2 4 0388 21 3 9 9 ...
Page 170: ...Service Guide 159 Figure 3 Paper path FRUs 0388 80 2 1 5 11 10 9 12 6 4 3 7 13 8 11a 11b ...
Page 172: ...Service Guide 161 Figure 4 Motor and fan FRUs 0388 14 7 4 3 5 6 2 1 ...
Page 174: ...Service Guide 163 Figure 5 Circuit board FRUs 4 3 5 2 1 9 7 6 8 10 11 13 0388 81 12 7a ...
Page 176: ...Service Guide 165 Figure 6 Solenoid and clutch FRUs 4 5 3 2 1 0388 23 ...
Page 182: ...Service Guide 171 Figure 9 High capacity PaperTray 0388 65a 1 2 ...