Canon Pixma TR7800 Series Online Manual page 517

1686
Cause
The 1686 support code signifies that the printer has detected an issue with one or more of your ink
cartridges.
What to Do
The action you should take to resume operating the printer depends upon which function(s) of the printer
you intend to use.
1. To PRINT or COPY
If you intend to PRINT or COPY, you should take one of the following steps:
(a) For each ink cartridge identified by the printer as having an issue, disable the function that detects
the level of ink remaining by pressing the Stop button on the printer for at least five (5) seconds and then
releasing it.
If there is ink in the cartridge(s), you will be able to PRINT or COPY until the remaining ink is depleted.
Please note that image quality may be diminished if you PRINT or COPY when there is little ink remaining
in the cartridge(s).
OR
(b) Open the printer's cover, replace each ink cartridge identified by the printer as having an issue, and
close the printer's cover.
Canon recommends the use of new, genuine Canon ink cartridges for optimal image quality.
2. To SCAN or FAX
If you intend to SCAN (or FAX if your printer has that capability), you should take one of the following
steps:
(a) For each ink cartridge identified by the printer as having an issue, disable the function that detects
the level of ink remaining by pressing the Stop button on the printer for at least five (5) seconds and then
releasing it.
OR
(b) Open the printer's cover, replace each ink cartridge identified by the printer as having an issue, and
close the printer's cover.
Canon recommends the use of new, genuine Canon ink cartridges for optimal image quality.
Note
• If the function for detecting the level of ink remaining in an ink cartridge is disabled, the ink cartridge
will be displayed in white on the touch screen (if the printer has a touch screen) when you check the
estimated remaining ink level.
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