Xerox Phaser 8400 Service Manual page 132

Jam Code Troubleshooting Procedures
N7T Y-Axis motor media long during transfix. The media was measured to be longer
than it was believed to be.
1. Ensure the media is supported.
2. Try heavier media.
3. Try loading only a few sheets. Some photo media may require running one sheet
at a time.
4. Run the diagnostic Check Drum Y-Axis Encoder test.
5. Replace the Pick Assembly and retard roller.
6. Run the clean ink smears and check the preheater exit flag for debris.
7. Remove the paper preheater and ensure that the exit flag does not interfere with
the assembly. Replace the Paper Preheater if all else checks out.
P4A Process motor stalled on abnormal shutdown.
P4B Process motor stalled on power-up following a normal printer shutdown.
P4C Process motor stalled during mechanical recovery.
P4D Process motor stalled during an printer warm-up.
P4E Process motor stalled while the printer was in its ready state.
P4F Process motor stalled while the printer was in a fault state.
P4G Process motor stalled while the printer performed an auto drum maintenance cycle.
P4H Process motor stalled while the printer performed printhead maintenance.
P4J Process motor stalled while the printer performed printhead purge.
P4K Process motor stalled while the printer performed an oil transfix roller cycle.
P4L Process motor stalled while the printer was in standby mode.
P4S Process motor stalled while the printer staged for transfix.
P4T Process motor stalled while the printer transfixed the print.
P4V Process motor stalled while the printer performed a print drum maintenance cycle.
P4W Process motor stalled while the printer imaged the drum.
P4X Process motor stalled while the print exited the printer.
1. Ensure the media is supported.
2. Verify that the Process Drive Gearbox is correctly aligned and homed.
3. Run the Process Motor test.
4. Replace the process motor if necessary.
5. Run the Transfix Fast and Slow tests.
6. Replace the transfix camshaft and load arms if necessary.
7. Run the Tilt Drive test, replace if necessary.
8. Replace the process drive gearbox assembly.
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Phaser 8400/8500/8550 Color Printer