Thanks Waterboy71.
According to his advise, let me put the post here.
Hi.
After long time of no use, about 1-2 years, but self calibration by itself with power on,
the machine makes print with horizontal line patterns of black and yellow vertical direction at portrait print.
I have shaken the toners sevral times to resolve a possible banding problem.
But the machine shows the same patterns.
Another problem with it is that, maybe minor though,
as the printing goes on, after 20-30 pages prints, the black stain covers the whole pages and become darker and darker.
Please advise me of any solution, expect 'let it go to an expert to fix it'.
Thanks in advance.
