Simple Troubleshooting - Konica Minolta bizhub C451 User Manual

Troubleshooting
4.9

Simple troubleshooting

Main
unit
C451
Symptom
The machine does not
start up when the
main power switch is
turned on.
Copying does not
start.
The printed output is
too light.
The printed output is
too dark.
The printed output is
blurry.
There are dark specks
or spots throughout
the printed output.
There are streaks in
the printed output.
Possible cause
Is no power supplied from
the electrical outlet?
Has the sub power switch
been turned on?
Is the upper right-side door
of the machine open?
Is there no paper that
matches the document?
Is the copy density set too
light?
Is the paper damp?
Is the copy density set too
dark?
Was the document not
pressed close enough
against the original glass?
Is the paper damp?
Was the document not
pressed close enough
against the original glass?
Is the original glass dirty?
Is the left partition glass
dirty?
Remedy
Correctly insert the power
supply plug into the electri-
cal outlet.
Turn on the sub power
switch.
Securely close the upper
right-side door of the ma-
chine.
Load paper of the appropri-
ate size into the paper tray.
Touch [Dark] in the Density
screen to copy at the de-
sired copy density. (See
p. 2-73.)
Replace the paper with new
paper. (See p. 1-61, p. 1-65,
p. 1-68, p. 1-71 and
p. 1-73.)
Touch [Light] in the Density
screen to copy at the de-
sired copy density. (See
p. 2-73.)
Position the document so
that it is pressed closely
against the original glass.
(See p. 2-11.)
Replace the paper with new
paper. (See p. 1-61, p. 1-65,
p. 1-68, p. 1-71 and
p. 1-73.)
Position the document so
that it is pressed closely
against the original glass.
(See p. 2-11.)
Wipe the glass with a soft,
dry cloth. (See p. 9-3.)
Clean the left partition glass
with the left partition glass
cleaner. (See p. 9-3.)
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