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From: Richard Hewitt on 4 Jul 2005 11:35
I have a Canon MP390 which has a #343 error - waste ink tank full. Have
changed the diaper, but need the sequence to reset the internal counter.
Canon want to send an engineer on site to do it. This will cost more
than a new printer!!
From: zakezuke on 4 Jul 2005 15:42
> I have a Canon MP390 which has a #343 error - waste ink tank full.

It's either menu-scan-copy-scan to enter service mode or Menu copy copy
copy scan, probally the last one.

should be something like 8 for printer test 3 for e-prom clear 0 for
ink count, followed by [set] and [power] but your menus might be
different from my memory.

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