horizontal lines help

[gorgall2]

When I print with my Ricoh GX5050N, I'm getting thin horizontal black lines about 1cm apart, even on a nozzle check it's fine apart from a thin black line through the middle of the colour blocks.
Any ideas? I'm stumped.

Gordon

[jennywren]

I get them. and I do a couple of cleans then test print, have you tried that,

[gorgall2]

First thing I tried,

[bms]

When I print with my Ricoh GX5050N, I'm getting thin horizontal black lines about 1cm apart, even on a nozzle check it's fine apart from a thin black line through the middle of the colour blocks.
Any ideas? I'm stumped.

Gordon

Have you tried the head alignment?

[Justin]

Any chance of posting a pic? Do you get other horizontal lines in-between or just these? Have you checked the paper adjust/feed setting?

[gorgall2]

Head alignment and paper adjust/feed setting both fine. I've tried more head cleans, this seems to make some of the lines disappear for one clean only to reappear on the next.

[gorgall2]

[ATTACH=CONFIG]866[/ATTACH]
these are the lines

[John G]

Could they be ink on the transfer rollers type wheels that guide/pull the paper through the printer.

[gorgall2]

I don't think so, as they go across the paper not down it.

[JSR]

What's the size of the Ricoh printhead? If it's 1cm, then that could be a broken printhead that has one of the black nozzles constantly firing.

It's just a thought. I don't own a Ricoh but I'm fairly sure I've seen something similar before when the line was across the page and the same distance as the size of the printhead.