C650 Grey Scale prints light

[methogod]

All supplies seem to be in range.
Color prints good (for the most part).

Any suggestions... or adjustments...

[copier addict]

All supplies seem to be in range.
Color prints good (for the most part).

Any suggestions... or adjustments...

Dirty printhead?

[Synthohol]

do a couple manual toner adds and run initialize and stabilize then do 3 of each gradation.
if it has a Fiery, do the above then a calibration.