Phil Hobbs wrote in message
...
N_Cook wrote:

More out of interest what went wrong than necessity as only used for
poster
use. Epson Stylus 915, if relevant.
Lack of Red and excess of Yellow
A perfectly adequate get-around is +30 percent of Red and 30 percent
less
each of Green and Blue in the graphics package. It all started with a
postal
packing foam "doughnut" dropping unnoticed into
the paper entry slot and numerous paper jams before finding the culprit.
The
ink-jet cartridges are re-set , re-used/ redilled multiple times and
refilled and reset since this foam business. Built-in "cleaning" and the
other maintainence routine has made no difference. The colour imbalance
is
stable and invariant over perhaps 30 sheets and 4 separated sessions.

At a guess, there's some crud on top of a colour-calibration photodiode
somewhere inside.

Cheers

Phil Hobbs


Is that part of the printer hardware? like the auto-exposure photodiode
inside a photocopier? ie not in the ink-jet carts.
Time to explore the innards of one of those junkers in the mule-park, I
think, to get the hang of ink-jet general operation.