How do I do a complete reset of a printer?
I have a Canon S820 inkjet printer that's worked fine for some years on my G5 PowerMac. Some time ago it started printing "off color", putting a magenta cast on everything, and nothing I could do with Colorsync profiles or other adjustments would correct it. I finally printed the test pages (nozzle check and print head alignment pages) and realized that some of the test patches were being printed in the wrong color - the Photo Cyan patch was printed with black ink and the Photo Magenta patch was printed with Cyan ink. I plugged the printer into my old G4 PowerBook (also running OSX 10.5.8) and lo and behold, the test pages printed in the correct color! (And yes, I do have the right ink cartridges in the right slots.)
So there's nothing wrong with the printer, but something in the G5's driver's innards has gotten twisted. So far I have not found a way to do a complete reset of this printer's installation. I deleted the print queue and reinstalled the driver package (driver version 4.8.3, downloaded from Canon), to no effect. I then deleted the print queue again, found the folders for the printer in /Library/Preferences and /Library/Printers (Canon/BJPrinter in both instances), deleted them, and again reinstalled the driver package, and I still get the wrong colors. The printer is set up with a valid current Colorsync profile, although the "factory profile" in Colorsync points to a non-existent file. This is stale data left over from an earlier version of the driver, which I haven't found a way to remove. (Side question - how can I get rid of a "mode" in the Colorsync Utility's device list?)
The PowerBook is also running the 4.8.3 driver; about the only difference in history I can think of is that I updated the driver from an earlier version on the G5, but on the Powerbook, 4.8.3 was the initial install. This makes me suspect that updating the driver may have gotten something out of line.
What I'd like to do is remove every vestige of the driver from the system and then reinstall it. The driver package does not have an uninstall facility that I can find. So far I haven't found a big enough hammer or all of the nails that need to be hit. Any bright ideas?
Thanx - Andy
Thanx for the reply.
I've been continuing to experiment since my original post, and it's looking like it's the printer after all. After all the testing on the G5, I plugged it back into the Powerbook and now it's printing the same wrong color in the test page from there. Not only that, but I removed the print head, cleaned the contacts, and put it back, and that changed the wrong colors. Still not right, but different. So I'm thinking I have a somewhat intermittent failure in the print head.
What's especially puzzling is that I have two S820 printers, and I've been swapping printers and print heads around, and all the combinations are failing the same way (a medium gray where it should be Photo Cyan, otherwise OK). I've read elsewhere that the wiring in the S820 print head fails after a while and you can get all kinds of funky behavior. A classic (which I'm seeing with one of the print heads) is that the activation of some of the nozzles gets swapped. So I could believe that it's hitting the nozzles for the wrong ink as well.
I've gotten a number of years out of these guys, and I suspect it's time to write them off. The main irritation is the number of ink cartridges I have left over...
- Andy
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