4,0Xx.4X Errors - Process Control System Fault - Xerox Phaser 8400 Service Manual

4,0XX.4x Errors - Process Control System Fault

4,017.47:
This fault code indicates a problem with the process control system. The
ambient temperature is considered too cold to warm up the printer (less than 10
4,018.48: This fault code indicates a problem with the process control system. The
printhead temperature dropped below the head cleaning needed threshold.
4,020.41: This fault code indicates a problem with the process control system.
Declared when the printer is booted in FTTR (Fast Time to Ready) mode and the
head/wiper contact flag is set in NVRAM. The printer cannot run in FTTR mode with
the head/wiper in contact because it would be unwise to separate the two when the
printer is cold (could tear wiper.) Service requested that this be a device fault in order
to alert the service person to this condition.
4,021.42: This fault code indicates a problem with the process control system.
Declared when the printer is booted in FTTR mode and the drum is dirty. Cleaning
the drum when very cold could increase the chance of gluing media to the drum
surface around the stripper fingers. Service requested that this be a device fault in
order to alert the service person to this condition.
Troubleshooting Procedure for Process Control System
Step Questions and Actions
1 1. Verify the temperature of the room where the
printer is located (see "Environmental
Specifications" on page 1-11).
2. Is the room temperature too cold for proper
operation of the sytem?
3. Ensure the printer is acclimated to the room
temperature.
4. Did this correct the problem?
2 1. Run the Monitor Heaters tests with all
heaters ON.
2. Are the heaters operating correctly and
within specification?
3
1. Inspect the wiring harness to the failed
heater.
2. Is the wiring harness damaged or not
working properly?
Service Manual
Yes
Complete. Go to Step 2.
Replace the Go to Step 3.
electronics
module.
Replace the Replace the
wiring harness problem
to the failed component.
heater.
o
C).
No
3-13