Xerox Phaser 840 Service Manual page 64

Table 2-4 Front Panel & Fault History Log Error Codes and Messages
Error code
4,032.66
PC_PROG_FAULT(0x20)
4,035.60
PC_PROG_FAULT(0x23)
4,040.65
PC_PROG_FAULT(0x28)
4,046.62
PC_PROG_FAULT(0x2e)
4,051.67
PC_PROG_FAULT(0x33)
4,059.66
PC_PROG_FAULT(0x3b)
4,064.62
PC_PROG_FAULT(0x40)
4,128.63
PC_PROG_FAULT(0x80)
4,243.61
2 - 48 Phaser 840/850/860/8200 Color Printer - Service Manual
Definition
Undefined result in pc_process_result(). The PC task function
pc_process_result() received an undefined inter-task
communication (ITC) result message from one of the tasks it
communicates with. This is typically caused by out-of-order
messages due to fault condtions different than what the software
expects.
Bad Status Message in pc_process_status() The PC task
received a inter-task communication (ITC) status message that it
did not expect.
Re-entrant call to halt detected. This error is generated in
pc_syshalt_seq(), (the soft shutdown state sequencer) when a
request during the enter state is made, while the printer is already
in the halt state.
I/O Right has been known to cause this fault code.
Dangerous Process Motor Detected. The PC task is about to
send a command to the process motor task to move the print
head into standby, home the print head or turn the process motor
while the PC task detects that the printer is in a dangerous
position (damage could result) from such a move. typically this
happens when a soft shutdown request is issued when the x-axis
is in a position where the print head would bind against the left
side ot the frame, if the process motor were moved.
Bad Command Result during Drum warm-up processing of a
PostScript command message in pc_process_message()
returned SERVICE_NEEDED during the drum warm-up period.
This should never happen and is flagged by pc_warmup_seq() as
an error.
Bad Command Result during Big Drop Flush Processing of a
PostScript command message in pc_process_message()
returned SERVICE_NEEDED during the big drop flush. This
should never happen and is flagged by do_big_drop_flush() as
an error.
Bogus Thermal State. The thermal state value stored in
non-volatile memory was not valid. This error is detected in
show_thermal_state() and probably indicates a corrupt NVRAM
device.
Bad Command Result waiting for Fault to clear processing of a
PostScript command message returned SERVICE_NEEDED
while waiting go the fault state to clear. This should never happen
and is flagged by pend_waiting _for_fault_to_clear() as an error.
Some Phaser 850 printers were built with printheads that had
different set points for different print modes. If the printer sees
what it believes to be an invalid set point this fault occurs. Review
the print options that the user is selecting and try a different print
quality mode or avoid selecting different page sources within a
job. Changing the printer defaults may also help, turn off 2-sided
printing, turn on the Startup Page, etc.
If these work-arounds are unsuccessful, replace the printhead.