Canon iP1500 - PIXMA Color Inkjet Printer Service Manual page 17

Accuracy: The margin of error of detection accuracy is +/-10% in normal printing.
The margin of error is likely to be large in the following specific print patterns:
When printing continuously using any one of the CMY colors of ink
-> As the remaining ink level is calculated by total counted dot values of 3 colors of ink, if
When performing continuous BK solid printing
-> With continuous printing, ink flow from the tank to the ink chamber can be interrupted,
Reset procedure:
Note: Be sure to reset the ink counter from the printer driver's Maintenance after replacing ink tanks.
<Possible problems with this function>
- Due to user error, the actual remaining ink level does not match the indicated remaining ink level,
resulting in "ink out", etc.
User error: Forgetting to reset the ink counter / ink counter reset other than when replacing ink
tanks.
- Due to the specific print pattern, the actual remaining ink level does not match the indicated remaining
ink level, resulting in "ink out".
Specific print pattern: Continuous printing using any one of the CMY colors of ink / continuous
BK solid printing, etc.
(5) Print head deep cleaning
The printer has a print head deep cleaning (refreshing) function.
Print head deep cleaning (refreshing):
<Possible problems with this function>
- Excessive ink consumption when conducting print head deep cleaning repeatedly. (The amount of ink
used is approx. 10 to 15 times the normal manual cleaning amount.)
<Reference> Cleaning types, amount of ink used, and time required
BK and CL ink drawing is simultaneously performed.
Manual cleaning
Dot count cleaning
Timer cleaning (24 hours to 2 weeks)
Print head replacement
Ink tank replacement
Cleaning when the print head is not capped at printer power on
Cleaning on arrival at user
Timer cleaning (2 weeks to 3 months)
Print head deep cleaning
Timer cleaning (3 months or more)
any of the C/M/Y inks is heavily consumed, the margin of error for remaining ink
increases.
after which ink remains unused in the tank.
Perform the following operations from the printer driver's Maintenance:
1. In Low Ink Warning Setting, enable Display low ink warning.
2. In Ink Counter Reset, reset the applicable ink counter(s).
This is a deep cleaning function in order to resolve print failure due to ink clogging
the print head. (The black ink is pigment-based, and clogs easier than other
dye-based ink.)
Perform from the printer driver's Maintenance.
Cleaning type Amount of ink used
BK: Approx. 0.12 g
CL: Approx. 0.14 g
BK: Approx. 0.42 g
CL: Approx. 0.52 g
BK: Approx. 0.42 g
CL: Approx. 0.52 g
BK: Approx. 1.5 g
CL: Approx. 2.2 g
( 17 / 21 )
Time required
Approx. 40 sec.
Approx. 45 sec.
Approx. 60 sec.
Approx. 70 sec.