Xerox Phaser 840, Руководство по обслуживанию, Страница: 72 / 287

2 - 56 Phaser 840/850/860/8200 Color Printer - Service Manual
11,033.65
DMC_PROG_FAULT(33) Motion Control Event Missed. A missed control store event was
detected. A health check routine is called every 400 milliseconds,
the A/D update period, and checks that all the currently pending
hardware motion profile events are for some time in the future. If
one is pending for a time in the past, then it generates this error.
A missed DMC interrupt due to interrupts disabled too long, by
any region, is a probable cause.
11,034.66
DMC_PROG_FAULT(34) Motion Control Done Timer Too Late. A motion control profile
done event could not be programmed. It was too late for the
software to program the done event for a motion profile handled
by control store event hardware. This error indicates that DMC
interrupts were disabled for a long period of time. Almost always,
this happens when a non-engine region generates a CPU
exception during printing. The operating system processes CPU
exceptions with interrupts off and the processing takes a long
length of time. The user should check the task name saved with
this fault to identify the culprit.
11,038.61
DMC_PROG_FAULT(38) A/D Input Out of Range. This error is generated during MEDUSA
ASIC analog to digital calibration and indicates that one or more
of the A/D mixed inputs, 5 volt, 40 volt or 3.3 volts, are out of
tolerance.
11,039.62
DMC_PROG_FAULT(39) Printhead NVRAM Read Failure. An attempt to read the
non-volatile memory on the printhead, via the I2C interface,
failed. This can happen if the wires are loose to the printhead or if
the NVRAM part does not ACK the read request.
12,000. INTER-TASK COMMUNICATION PROGRAM FAULT CODES
12,002.62
ITC_PROG_FAULT(2) This is a secondary failure. Something failed resulting in the
message stack overflowing. Unable to Send Message. The ITC
send message function, itc_send_msg(), was unable to place the
specified message in the destination message queue
(msgQSend() returned fail code). A full message queue is most
likely the cause.
13,000: PRINTHEAD THERMAL CONTROL TASK PROGRAM FAULT CODE.
Printhead thermal faults are determined by a thermistor in the printhead. 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). Use diagnostics to verify that the thermals
are changing.
13,001.40:
TCH_JS_LEFT_OPEN The thermistor in the left jet stack appears to be open. Check the
printhead cabling. Replace the printhead.
13,002.41
TCH_JS_LEFT_SHORT The thermistor in the left jet stack appears to be shorted. Check
the printhead cabling. Replace the printhead.
13,003.42:
TCH_JS_LEFT_HOT The left jet stack heater is running away. Unplug the printer
NOW! Check the printhead cabling. Replace the printhead.
13,004.43:
TCH_JS_LEFT_SLOW The left jet stack heater is not heating at all, or is heating too
slowly. Ensure the printer is not located next to an
air-conditioning duct. Check that the printhead-to-drum gap is
not too close (the drum can act as a heatsink). Inspect the
printer wiring. Replace the printhead.
Table 2-4 Front Panel & Fault History Log Error Codes and Messages
Error code Definition