Panasonic KX-P8420 - Manual (Page 172)

172
Care and Maintenance
Dark and wavy vertical
streaks appear in all
colors. The main charge grid
is dirty. Replace the color
imaging unit.
The entire page prints in
black, including the
borders. Bad electrical contact
for the main charge
grid. Reinsert the color
imaging unit to correct
the contact for the
main charge grid.
The main charge grid
is broken. Replace the color
imaging unit.
Toner spots appear on
the back of the media. The transfer unit is
worn out. Replace the transfer
unit.
The page prints in black
in the image area only.
(The borders are clear.) Either the image
processor board or
engine control board
is not functioning
properly. Turn the printer off
and back on again. If
the problem persists,
call for service on
your printer.
Trouble Possible Cause Corrective Action