Digital BW, The Print

They are horizontal when printing in landscape format and obviously 
come from a part of the printer that slightly scratches the surface 
of the paper. Not enough of really damaging the surface, but 
scratching a part of the ink away. Not strongly visible from more 
than 1 meter or so, but not beautiful. 

It appears more clearly on semigloss paper, but not on Epson achival 
matte. I haven't yet figured out what part it actually is, but could 
be one of the small rolls, as its actually 2 lines in a distance of 
about 4-5mm. Is there a source of information how to adjust or would 
it be better to bring it in for service? Anyway it would not be the 
worst thing to do, as I am running my workhorse 1160 since 2y now 
without ever bringing it to a service.

Regards and thanks for answers in advance,

Bernhard