C4170-90959
Image Formation Troubleshooting
123
Paper does not meet
specifications. The
paper moisture
content, conductivity,
or surface finish may
not work correctly with
the
electrophotographic
process.
Try a different paper lot. See “Media
Troubleshooting” (page 134).
Engine Controller
defective (low primary
voltage or incorrect
high voltage).
Replace the Engine Controller.
Transfer Roller
defective.
Replace the Transfer Roller. See also “Blank Spots”
(page 118).
Hot offset after
running narrow or thin
media.
Let the engine cool and retry printing.
Faded Print/Bubbles
Possible Cause Action
No drum ground path. With no ground path the drum cannot discharge. The
negative charge on the drum repels toner, and
leaves a white page with bubble print.
1) Replace the Shaft Coupling.
EconoMode is on.
EconoMode saves
toner by reducing the
dot density. This may
appear to be a print
quality problem in
some cases.
Turn EconoMode off.
Toner supply is low. Shake the cartridge gently to redistribute the toner,
or replace the cartridge.
Paper does not meet
specifications. The
moisture content,
conductivity, or
surface finish may not
work correctly with the
electrophotographic
process.
Try a different paper lot. See “Media Specifications”
(page 28).
Transfer Roller is
defective or incorrectly
installed. If the
transfer roller loses
conductivity, it cannot
effectively pull toner
from the drum to the
paper.
Inspect the Transfer Roller for proper installation and
contact. If the Transfer Roller is damaged, replace it.
Dropouts (continued)
Possible Cause Action
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