Canon Pixma TR7800 Series Online Manual page 519

1688
Cause
The 1688 support code signifies that the printer has detected that one or more of your ink cartridges is
empty.
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) 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, due to individual usage factors, there is some residual amount of 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 scanning unit / cover, replace each ink cartridge identified by the printer as being empty, and
close the scanning unit / 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) 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 scanning unit / cover, replace each ink cartridge identified by the printer as being empty, and
close the scanning unit / 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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