Gray Background - Mita DP-2800 Service Manual

Gray background

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Check contamination on the
main charger wire and the grid.
Check the grid plate (the
mesh metal bottom part of
the charger unit).
Check the print density setting.
Check the surface potential of
the drum.
The developer unit may be
defective.
• Clean the main charger wire by pulling the green color
main charger wire cleaner know in and out several
times.
• The grid plate must be flat and fit horizontally in place.
Replace the main charger unit if necessary.
• The print density may be set too high. Try adjusting the
print density using the MODE SELECT key. For details
refer to the printer's instruction handbook.
• The drum potential values may vary depending on
production lots and the measurement is possible only
by using the jig and tool specifically designed for this
purpose. The drum unit will have to be replaced if it will
bear the values far out of the allowable range.
• If a developer unit which is known to work normally is
available for check, replace the developer currently
used in the printer with it. If the symptom disappears,
replace the developer unit with a new one.
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