6-10
Phaser 440 Color Printer
6
Troubleshooting
4.
Ensure that the thermal head fans runs during printing to keep the
thermal head from overheating during printing. The fans, mounted at
the rear of the top cover, blow outward. If the fans do not run, replace
the print engine.
5.
If the voltage supplied to the thermal head is correct and the DIP
Switch 2 setting is correct, then replace the print engine
6.
If printing still does not improve, replace the print engine.
Image is offset or cut off
1.
Check the application for the correct image sizing.
2.
Ensure that the correct printer driver and printer support files (such as
.apd
and
.ppd
files) are being used.
3.
Ensure that the media in the tray corresponds to the media requested
by the application.
4.
Check the tray sensors (interrupt type) to ensure that they are being
activated by the paper tray in the printer. Also inspect the sensor
interrupters on the end of the tray to ensure that they are undamaged
and can activate the tray sensors.
Wrinkling
Wrinkling occurs when the transfer roll is not maintaining smooth, even contact
between the thermal head and the paper; instead, it is wrinkling and rippling.
1.
Clean the thermal head. Refer to the Chapter 7 topic “Cleaning.” If
necessary, use the service cleaning kit (order number 016-1058-02) to
“deep clean” the thermal head.
2.
Determine if the transfer roll has been unrolled and then rolled up
again. Uneven packing in the transfer roll causes uneven tension
which results in wrinkling.
3.
Inspect the thermal head for damage. If it is damaged, replace the
print engine.
Misregistration
Misregistration is illustrated in Appendix B “Test Patterns.” Misregistration
occurs when the paper does not track evenly between each pass of the thermal
head. Misregistration can be parallel or perpendicular to the path the paper
travels. Horizontal or x-axis misregistration can be compensated for by a
mechanical adjustment. Vertical or y-axis misregistration can be compensated
for by an electronic adjustment. Refer to the Chapter 9 topic “Adjusting for color
misregistration” on page 9-6.
