Paper Path And Media-Based Problems; Media-Based Problems; Paper-Pick Errors - Trays 2, 3, And 4 - Xerox Phaser 8400 Service Manual

Motor and solenoid resistances
Motor or solenoid
Media path motor
Wiper drive clutch
Paper-pick clutch
Deskew clutch
MPT Pick solenoid.

Paper Path and Media-based Problems

For paper path and media-based problems, first check the displayed error codes using
the Error Code Definition Table beginning on page 3-8 to help determine where the
error is occurring.

Media-based problems

1. Check that the correct type of media is being used, for information on the correct
media type and sizes refer to the Paper Tips page, which is printable from the
printer Front Panel Menu
2.
Ensure the correct weight of paper is being used.
3. Ensure that envelopes are of an acceptable size and oriented with the side-flap up
for Tray 1 and the side flap down for Trays 2, 3, and 4.
4. Ensure that the correct media is in the correct media tray. The tray switch
actuators indicate the media size loaded in the tray; the printer does not directly
sense the size or type of media. Ensure that the media guides in the tray are set
correctly.
5. Inspect the paper for bent, torn or folded corners.
6.
Check to ensure no small pieces of paper are in the paper path.
7.
Check for stuck sensor flags.

Paper-pick errors - Trays 2, 3, and 4

Paper-pick errors occur when the media in the media tray mispicks or the printer
double-picks two or more sheets of paper.
1. Inspect the paper path for obstructions.
2.
Ensure that the side guides are set correctly by sliding the guide gently against
the media.
General Troubleshooting
Resistance (approximately)
1.5 +/- 20% ohms/phase
132 ohms +/- 15%
186 ohms +/- 15%
124 ohms +/- 5%
4-75