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From: tenchman on 25 Feb 2005 18:26
Hi Group,

Been trying to resurrect a neighbours 740 which has been lying idle for over
two years, have cleaned the jets, replaced the old tanks with new ones, run
a couple of cleans and all seems okay.

Except that the status monitor is showing the new tanks as nearly empty.
Is this normal?
When a tank change has been needed due to what I believe were dried up inks
even though the monitor showed a third full.

Can anyone advise me whether they will keep printing although showing nearly
empty or will I have to replace them again. Is there a way to fool the
monitor to show the correct level.

Thanks in advance to all those that take the time to reply

David


From: Harvey on 25 Feb 2005 18:38

"tenchman" <tenchman(a)spamoff.ie> wrote in message
news:cvoc71$r1u$1(a)reader01.news.esat.net...
> Hi Group,
>
> Been trying to resurrect a neighbours 740 which has been lying idle for
> over two years, have cleaned the jets, replaced the old tanks with new
> ones, run a couple of cleans and all seems okay.
>
> Except that the status monitor is showing the new tanks as nearly empty.
> Is this normal?

That printer stores the level of ink remaining in the carts internally -
having no chips on the ink carts themselves, it has no way of knowing that
the actual ink level in the cart is actually full, empty, or anywhere in
between.
Changing the ink carts when the printer still thinks they have ink remaining
in them confuses the counting logic.

> When a tank change has been needed due to what I believe were dried up
> inks even though the monitor showed a third full.
>
> Can anyone advise me whether they will keep printing although showing
> nearly empty or will I have to replace them again.

It will stop printing when it *thinks* the ink is used and request a
cartridge change. At that time, you could replace them with carts that are
actually full (or refill the old carts at that point and refit them) and it
should then get back in sync with itself...

>Is there a way to fool the monitor to show the correct level.

I dunno if the service program for that printer can do that, but the
programs I have for the 640, 460 etc. series can't.

> Thanks in advance to all those that take the time to reply
>
> David
>


From: Harvey on 25 Feb 2005 18:57

> I think you can also reset the Ink monitor by just reinstalling the Ink
> tanks

Yes you can, but only if the printer asks for them to be changed first,
which it won't do unless it thinks they are empty, so if it asks, and you
remove and refit half-full ink carts they will run out before the printer
thinks they are empty and you have to pull-the-mains-plug to change them,
but then the printer still thinks they are half empty when they are actually
full so when the printer then thinks they are empty they are actually half
full so you either have to go through that process again, or when the
printer asks for a new ink cart you fit a full one and waste half an carts
worth of ink so that the printer knows that the ink cart is actually full
when the printer thinks its full so when it thinks its empty it acually is
empty and not half full.

<deep breath>

OK ? :)


From: tomcas on 25 Feb 2005 21:05
Harvey wrote:
>>I think you can also reset the Ink monitor by just reinstalling the Ink
>>tanks
>
>
> Yes you can, but only if the printer asks for them to be changed first,
This is not true. You can prompt for replacing cartridges before they
are empty, which in tenchmans case, I would recommend.
Open the cover and press the Load/Eject button for 3 seconds. Use this
method only when replacing old or outdated cartridges before the ink
level lights flash or come on.
http://files.support.epson.com/flash/sc670_/oldink.html
In tenchmans case he won't actually have to replace the cartridges but
just go through the motions. This means he will have to open the latches
and pull the cartridge out at least far enough to trip the detecting
switch before reinserting and latching the top.




> which it won't do unless it thinks they are empty, so if it asks, and you
> remove and refit half-full ink carts they will run out before the printer
> thinks they are empty and you have to pull-the-mains-plug to change them,
> but then the printer still thinks they are half empty when they are actually
> full so when the printer then thinks they are empty they are actually half
> full so you either have to go through that process again, or when the
> printer asks for a new ink cart you fit a full one and waste half an carts
> worth of ink so that the printer knows that the ink cart is actually full
> when the printer thinks its full so when it thinks its empty it acually is
> empty and not half full.
>
> <deep breath>
>
> OK ? :)
>
>
From: Arthur Entlich on 28 Feb 2005 10:20
I believe there is a front panel procedure for replacing the cartridges
at any time (usually it is something like holding the cleaning cycle
button down together is it has one for black and one for color). The
process is usually listed in the manual under "replacing an outdated ink
cartridge".

However, as you stated in doing so, you will get a full new cartridge
purge, and the printer will assume the new cartridge is filled, even
when it is partially empty, unless it is refilled prior to reinstallation.

Art

Harvey wrote:

>>I think you can also reset the Ink monitor by just reinstalling the Ink
>>tanks
>
>
> Yes you can, but only if the printer asks for them to be changed first,
> which it won't do unless it thinks they are empty, so if it asks, and you
> remove and refit half-full ink carts they will run out before the printer
> thinks they are empty and you have to pull-the-mains-plug to change them,
> but then the printer still thinks they are half empty when they are actually
> full so when the printer then thinks they are empty they are actually half
> full so you either have to go through that process again, or when the
> printer asks for a new ink cart you fit a full one and waste half an carts
> worth of ink so that the printer knows that the ink cart is actually full
> when the printer thinks its full so when it thinks its empty it acually is
> empty and not half full.
>
> <deep breath>
>
> OK ? :)
>
>
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