Xerox Phaser 840 Service Manual page 73

Table 2-4 Front Panel & Fault History Log Error Codes and Messages
Error code
13,011.66
tc_bomb(this, 11)
13,017.47:
TCH_JS_RIGHT_OPEN
13,018.48:
TCH_JS_RIGHT_SHORT
13,019.40):
TCH_JS_RIGHT_HOT
13,020.41:
TCH_JS_RIGHT_SLOW
13,033.45:
TCH_RESERVOIR_OPEN
13,034.46:
TCH_RESERVOIR_SHORT
13,035.47:
TCH_RESERVOIR_HOT
13,036.48:
TCH_RESERVOIR_SLOW
13,037.61
TCH_RESERVOIR_ADC_
IS_BAD
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
diagnostics to verify the thermals are changing.
15,000.40:
TCD_THERMISTOR_
FAULT
15,001.42:
TCD_THERMISTOR_
OPEN
15,002.43:
TCD_THERMISTOR_
SHORT
15,003.44:
TCD_THERMISTOR_
HOT
Definition
Bad TCH message in fault state. While in the divice fault state,
the reervoir thermal manager received an unexpected message,
not a turn off or a regulate command. The device fault state is
entered whenever the engine firmware detects a device fault
(x,xxx.4x).
The thermistor in the right jet stack appears to be open. Check
the printhead cabling. Replace the printhead.
The thermistor in the right jet stack appears to be shorted. Check
the printhead cabling. Replace the printhead.
The right jet stack heater is running away. Unplug the printer
NOW! Check the printhead cabling. Replace the printhead.
The right jet stack heater is not heating at all, or is not heating as
quickly as it should.
The thermistor in the reservoir appears to be open. Check the
printhead cabling. Replace the printhead.
The thermistor in the reservoir appears to be shorted. Check the
printhead cabling. Replace the printhead.
The reservoir heater is running away. Unplug the printer NOW!
Check the printhead cabling. Then replace the power supply. If
the problem continues replace the printhead.
The reservoir heater is not heating at all, or is not heating as
quickly as it should. Check the printhead cabling. Replace the
printhead.
The analog to digital converter appears to be bad. Try reseating
the printhead data cable. Then reseat the main board. If the
problem continues try replacing the main board and then the
printhead.
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.
The drum thermistor appears to be open. Replace the
drum-temperature sensor.
The drum thermistor appears to be shorted. Replace the
drum-temperature sensor.
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.
o o
F (35 C) and 50
Error Codes and Messages
o o
F (10 C). User
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