On Sat, 29 Oct 2011 20:29:53 -0700 (PDT), "
wrote:

I have a HP PSC 1315 printer, scanner, copier. The instruction manual
and the printer itself say to use 27 or 56 black, and 28 or 57 color
cartridges. I have a couple of 21 black and one 22 color cartridges
that are unopened. The pins and physical mounting appear to be
identical to the newer cartridges. I know that I can just put the
cartridges in and see what happens, but does anyone know for sure if
these older cartridges can definitely be used?

The carts have chips inside that will complain that you have the wrong
cart. I have the identical printer in the office but have not tried
swapping carts. When I tried it with other printers and almost
interchangable ink and toner carts, it usually fails.

I suggest you look into refilling the carts. I've had really good
luck with refilling black ink carts and almost no luck with the color
carts. Bulk black ink is cheap at 1000ml for about $30. At 10ml ink
for the HP27 cart, that's 100 refills.

Since my customers that have such printers don't do much color
printing, I set their printer driver to print everything in black and
white. The almost empty color cart just sits in the printer doing
nothing. When possible, I try to sell them on a laser printer
replacement (HP LJ2300dn this week) and using the AOI inkjet printer
as a small scanner.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558