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11 MAINTENANCE
370 Simple Troubleshooting
Functions cannot be set
Image density is too low
Image density is too high
Image trouble
Item to be checked Countermeasure Reference page
Are there functions that cannot
be combined set together?
See the copying function combi-
nation and image quality adjust-
ment combination matrices, and
then set them again.
P.382 “Copying Function Com-
bination Matrix”, P.384 “Image
Quality Adjustment Combination
Matrix”
Item to be checked Countermeasure Reference page
Is the message to replace the
toner cartridge displayed on the
touch panel?
Replace the toner cartridge. P.296 “Replace Toner Car-
tridge Symbol”
Is the level of the color adjust-
ment set suitably?
Use the manual density buttons
or the background adjustment
function to adjust the image den-
sity properly.
P.137 “Copy Density Adjust-
ment”, P.144 “Background
Adjustment”
Item to be checked Countermeasure Reference page
Is the level of the color adjust-
ment set suitably?
Use the manual density buttons
or the background adjustment
function to adjust the image den-
sity properly.
P.137 “Copy Density Adjust-
ment”, P.144 “Background
Adjustment”
Phenomenon Usual cause Countermeasure
The copied image is stained. The Automatic Document
Feeder (optional) or the
Platen Cover (optional) is not
lowered fully.
Lower them fully to block outside light.
The original glass, platen
sheet, scanning area or
guides are dirty.
Clean them.
P.368 “Daily Inspection”
The copy density is set
darker.
Make the density lighter if you use the
manual copy density mode. Or use the
automatic copy density mode.
A highly transparent original
is used.
Place a blank sheet of paper, the same
size as the original or larger, over the orig-
inal.