Bob F wrote:
I have a printer given to me that does not print properly from the
black print head. There are regular horizontal gaps in every printed
head, which I think indicate plugged jets in the print head. I'd like
to manually clean the face of the head with ammonia water like I have
previously on other printers, but this unit does not seem to offer
any easy access to the actual print head. Can anyone suggest the
easiest way to get to it, perhaps with a cotton swab?
I have tried multiple cleaning cycles, and printing pages of all
black with no improvement. They print well except for about 1/8" gaps
horizontally every 1/2".

Thinking about this, since it's one section of the entire print head that seem
to be not printing, this might be more likely perhaps to be an electrical
problem in the signals to the print head. Any opinions?