Hi, look in your manual and do all the maintenance and head cleaning modes, once you have your results like head alignment you will be-able to detect the problem.
do both your ink cartarages work black and color?
that is odd, check your printer settings in the acrobat adobe application, if your printer is printing correctly on msword then its working.
try a hard reset unplug the printer for 30mins and try again, this will reset the printer's hardware.
or in this case try to 'reset the ink cartrages' this will work :-
To Reset the Canon Cartridges
Power off the printer
Hold the stop/reset button then press and hold power (for 5 secs)
Hold Power and release the stop/reset button
Press the stop/reset button twice
Release power button
Wait until the power button lights a steady/still green, press the stop/reset button three times with a
3 sec space between each press.
On the 3rd press the indicator should be orange.
Press the power button to set data
To set data remove cartridges then replace.
leave for 20 or 30 secs
Press the power button again to shut down
Then press power button to power up.
The printer will feed one piece of paper through
then set language and country.
Then ink should be reset
Have a go good luck.
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Thanks for the quick response. First, I don't have the manual. Any way to get one for free online? Second, this does not seem to be a maintenance issue. I've had the printer for less than a year I have hardly ever used it for printing (mostly just scanning).
Oh never mind. I understand what you mean. Okay, I am running the maintenance stuff. In the nozzle test, the black printed fine. What's up with that?
Yes, both work fine in all the tests. I probably should have discovered this earlier, but it turns out the printing-too-light problem is actually only occurring with SOME pdf documents. Word is printing fine. But with some pdf docs that print normally on my other printer and are obviously standard black text are printing in this really light gray as though they're printing on wax paper or something. It's weird.
Yeah, this is obviously a very odd problem. I'm actually using Preview for Mac. The same pdf files that print black on my hp printer are printing extremely light gray on my canon so it seems to be a printer issue, but perhaps it is an issue that is too unusual to figure out.
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