Digital BW, The Print

Peter,

Same symptoms here about 6 months ago.  Went to NMC, they advised new
carts, under warantee :-), replaced in 10 minutes, working ever
since...Knock on wood.  Seems the filters in the carts get clogged.

Phil Morse 

Peter McLennan wrote:
> 
> I found that my CIS lasted about a year and a half before the black channel
> quit.  I had poor black channel performance and tried many ways to clear
> the "clog", including injecting the head directly with Windex.   When I got
> a good test pattern, I ran a black-only test image at high speed and
> watched as the ink lay-down quickly went from total black to just a few
> black lines on the page.  I deduced from this that it was the CIS that was
> starving the black head for ink, not a clogged head. I bought a new CIS,
> installed it and I'm printing normally again.  Others have commented that
> the black channel (not the head) suffers from clogging due to evaporation
> of the solvent through the Nalgene tubing.
> 
> regards,
> 
> Peter
> 
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