3-98
Phaser 7300 Color Printer Service Manual
Residual Imaging or Ghosting
There are faint, repeating images appearing on
the page. The images may be either from a
previous page or from the page currently being
printed
If the colors are offset by only a small amount
(10 mm maximum), this is
mis-registration
,
not
ghosting, see “Color Mis-Registration” on
page 3-101.
There are two reasons for image ghosting:
Fuser Hot Offset:
This can be characterized by a repeating image at every 143 mm.
The fuser temperature is set too high for the given media and the toner will adhere to
the fuser rollers causing the image to be deposited further down the page or on the
following pages.
Hot Offsetting and Fuser temperature.
Offsetting occurs on media if the fuser’s
temperature setting does not match the media type loaded in the tray.
See "Media and Tray Specifications" on page 1-16 to identify the media types
approved for this printer. The media type settings may need to be changed to match
the Fuser’s temperature with the given media.
See Theory of OP for media and fuser
settings
Imaging Unit Ghosting:
This can be the Imaging Unit (green roller) where a
residual image is left on the green film, which is then deposited further down the
page. This is most noticeable on images that have a dark background with light text.
The text is ghosted down the page at 94 mm intervals. This is caused by a defective
erase lamp in the Imaging Unit.
Ghosting every 50 mm is caused by the developer roller in the Imaging Unit and is a
limitation of the Imaging Unit design; therefore, technicians should not replace
Imaging Units for this type of ghosting.
S7300-031
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