6-10
Phaser 440 Color Printer
6
Troubleshooting
Paper-clamping errors
Note
Figure 1-3 illustrates the location of all the printers' sensors.
1.
Check hex-encoded error indicators on the front panel by
momentarily pressing the TEST button. (The later topic “Displaying
error codes on the front panel” on page 6-18 explains how to interpret
error codes.) In most cases, either an error code from 22 or 26 through
2B through 2F is displayed. These failures can be caused by faulty
sensors, improper media size, roller failure or poor media clamping.
Also check for foreign objects in the paper path.
2.
Ensure that the paper clamp operates correctly. The paper clamp
should be opened when the drum motor reverses and drives the drum
against the drum stops, which forces open the clamp.
3.
If the paper clamp is not opening correctly because the drum is not
rotating against the drum stops, then test the drum home position
sensor. Refer to the Chapter 9 topic “Switch and interrupt sensor
checks” on page 9-12.
4.
Clean the paper clamp with alcohol and a lint-free cloth to ensure that
it is fully gripping the sheet of paper.
5.
If clamping does not improve, inspect and clean the lenses of the
paper clamp sensor. The lenses face upward and can be occluded by
paper dust. You must either clean the sensor with a long-stemmed
swab through the access hole in the left side of the printer frame or
else you must remove the drum to access the sensor underneath.
Refer to the Chapter 8 topic “Drum” on page 8-20 for information on
drum removal.
6.
If clamping still does not improve, replace the paper clamp sensor.
Print-eject jams
1.
Test the paper eject sensor. Refer to the Chapter 9 topic “Switch and
interrupt sensor checks” on page 9-12. If the sensor fails the test,
replace it.
2.
Check to see if the upper eject roller drive belt is broken or slipped off
of its pulleys. In such a case, the upper roller will not rotate when the
lower roller rotates.
3.
Inspect the idler rollers on the inside of the top-front cabinet panel;
they should rotate freely.
4.
Check that the exit roller rotates smoothly and that the front cover is
fully closed and seated.
5.
Check the paper eject path for obstructions.