Front Panel & Fault History Log Error Codes And Messages; C Bus - Xerox Phaser 840 Service Manual

Table 2-4 Front Panel & Fault History Log Error Codes and Messages
Error code
2,000: SYSTEM FAULT I/O BOARD...
2,001.40:
SY_DEV_FAULT_IO_
RIGHT
2,002.40:
SY_DEV_FAULT_IO_
LEFT
2,002.61:
SY_PROG_FAULT(2)
2,003.62:
SY_PROG_FAULT(3)
4,000: PC (PROCESS CONTROL SUPERVISOR)....
04,001.40:
PC_DEV_FAULT_HEAD_
READ
04,002.41):
PC_DEV_FAULT_HEAD_Z
EROS
4,003.42:
PC_DEV_FAULT_HEAD_
ONES
4,004.43:
PC_DEV_FAULT_HEAD_
CHECKSUM
4,006.67:
PC_PROG_FAULT(0x06)
Definition
The engine cannot detect the presence of the right I/O board.
Ensure the connections are sound.
The engine cannot detect the presence of the left I/O board.
Ensure the connections are sound.
Queue Initialization failure during execution of sy_app_init()
(early initialization code), the engine firmware was unable to
initialize the queues used for inter-task communication. This
indicates a failure in the call to function sy_creat_queues().
Can't start service diagnostic tasks, (while booting into diagnostic
mode) during execution of sy_app_init() (early initialization code),
the engine firmware was unable to start the service diagnostics
task.
Failure reading printhead NVRAM data: check the wiring to the
2
printhead, I C bus and other hardware.
May also be related to ESD.
Printhead NVRAM data was all 0s: has this printhead been
through normalization? If so, check wiring to printhead.
May also be related to ESD.
Printhead NVRAM data was all 1s: has this printhead been
through normalization? If so, check the wiring to the printhead.
Printhead NVRAM checksum failure: the data within the
printhead NVRAM has been corrupted. Check the hardware and
wiring. The printhead may need to be renormalized (a
manufacturing function).
This indicates that an undefined message was found by the
processor. This may be caused by ESD. Check grounding and
media issues.
Error Codes and Messages 2 - 45