Xerox Phaser 8400 Service Manual page 77

Error Code Definition Table (Continued)
Error code
4,018.4x
PC_DEV_FAULT_LATE_
CLEAN_REQUEST
4,024.4x:
PC_DEV_FAULT_CAP_INIT_
FAILED
4,025.4x:
PC_DEV_FAULT_PM_INIT_
FAILED
3-10
Definition
This fault code indicates a problem with the Process
Control system. Declared if, for some reason, the warmup
sequencer had determined a head clean operation was
not needed, then the printhead temperature dropped
below the head-clean-needed threshold. This would
cause the printhead thermal tasks to say the head
needed to be purged after all, even though thermals were
stabalized during warmup state. Something may be
wrong with a heater.
1. Verify the ambient temperature of the room the printer
is in is not too low. If the temperature is too low, warm
up the room.
2. Run the heater tests with all Heaters on.
3. If the heater test fails replace the heater.
4. Inspect the heater wiring harnesses.
5. If the heater tests passes, replace the Electronics
Module.
This fault code indicates a problem with the wiper. After
homing the wiper it asks for it to go to the PARK/LOCK
position. If the wiper motion fails during mech init to go to
the correct position this fault will occur.
1. Check wiper alignment.
2. Run the Wiper Drive diagnostic test.
3. Inspect the wiper drive system and wiper lock system
for proper operation.
This fault code indicates a problem with the Process
Control system. After repeatedly trying to home the head
tilt mechanism, with the x-axis in different positions, we
still cannot succesfully home the dmfix mechanism.
Something must be stuck or disconnected limiting the
ability of the mechanism to go through the required
homing motion.
1. Check for an obstruction around the printhead such
as the printhead heater wiring.
2. Check the process gearbox for damage. Ensure the
gears are correctly aligned. Replace the process
gearbox if damaged. Run the diagnostic test Tilt
Drive.
3. Use diagnostic test X-axis Motor to test the x-axis
motor current. Replace the x-axis motor if the test
fails.
Phaser 8400 Printer Service Manual