6-12
Phaser 440 Color Printer
6
Troubleshooting
Media skews passing through the paper path
1.
Check to see if the media is excessively curled. Curled media can get
mistracked in the paper path.
2.
Examine the paper path. Is there an obstacle blocking the path?
3.
Check to see if the drum's paper clamp operates correctly. You should
be able to open and close it smoothly and evenly. Is it clean? Paper or
film can slip in a dirty clamp. Refer to the cleaning procedures in
Chapter 5.
4.
Ensure that the pick rollers are clean so that they pick up a sheet of
media evenly.
5.
Determine if the paper-feed unit's aligning rollers pressure is
unbalanced; the tension springs at each end of the rollers should exert
an even pressure. You can check them by simply lifting each spring to
see if they each offer about the same amount of spring resistance.
Transfer roll jam
1.
Ensure that the transfer roll is not installed backward. It should feed
off the bottom of the supply roll and over the top of the take-up roll.
The series of black squares should be oriented under the transfer roll
mark sensors on the left side of the printer.
With black transfer rolls, look to see that the gear on the take-up roll
(front roll) is smaller than the gear on the supply roll (back roll).
2.
Clean the transfer roll sensors and the white reflective pad from which
they sense light reflect on. Ensure that the left edge of the transfer roll
tracks properly and passes over the white reflective pad.
3.
Inspect the wiring leading to the transfer roll sensors for nicks, cuts or
bad connections.
4.
Inspect the wiring leading to the transfer roll take-up motor for nicks,
cuts or bad connections. Ensure that the motor operates correctly and
that its gear, which meshes with the take-up roll is mounted securely
to the shaft of the take-up motor.
5.
Check the transfer roll gear train for smooth operation.
