Jeff wrote:
> I have three Canon i560's. They don't get a whole lot of use, but I
> finally had to change ink on one of them. The ink status monitor showed
> the black, cyan, and magenta all low with an exclamation mark. The
> yellow was completely full. When I pulled the black, cyan, and magenta
> tanks to replace them, they were indeed empty.
>
> I pulled the yellow tank to see how much ink it had, in case I needed to
> also get a yellow tank. The yellow tank was about 80 empty; I thought
> this was odd, because the ink monitor showed the yellow tank full up.
>
> I looked my other Canon i560's (which get even less use), and all their
> tanks showed full up on the ink monitor. I didn't pull any to have a
> look see.
>
> Does the Canon i560 ink monitor always show full up, even if the tank is
> not full, and only show empty when the tank IS empty or near empty?
>
> That is, does the ink monitor only show full or empty, and nothing in
> between?
Yes.
From what I've read, there's a small optical sensor below the ink
reservoir in each tank. As long as there's ink there, blocking the
sensor, it reads "full". As soon as the ink drops enough to expose the
sensor (essentially when the reservoir is empty), the system then
registers that tank as empty. At that point, however, you should still
have several prints available from the ink stored in the sponge section
of the tank.
