Solution: when the detailing agent is clean, only black fusing lines appear in the pattern. The dirty
de
tailing agent appears as dots or grey lines parallel to the left side of the black ones.
A clean detailing agent (leftmost image) indicates that the cross-contamination detected was external
and the dir
tied agent has been ejected from the printhead. It does not require a pen replacement.
Any markings present (central and rightmost images) are symptoms of internal cross-contamination and
the pen should be replaced.
Detailing agent is dirty due to an internal printhead problem 349
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