Canon PIXMA MP150 Service Manual page 21

8-2. Major Functions
(1) Quiet mode
The printer has a quiet mode function.
Compared with the normal mode,
Acoustic noise level:
Audible overtone level:
Print speed:
<Possible problems with this function>
- The operation sound does not become quieter.
-> The audible sound becomes only slightly quieter.
- Printing is slow.
-> Disable the Quiet mode.
(2) Remaining ink level detection function
The printer has a function to detect the remaining ink level.
Detection method: Dot counting (Counted for each Black/CL ink cartridge)
Display method:
Accuracy:
<Possible problems with this function>
- When a once-used ink cartridge is installed, the actual remaining ink level is not detected, and an
error indicating the remaining ink amount is unknown occurs.
Pressing the OK button will clear the error, and printing can be done. However, the function to
detect the remaining ink amount is disabled (ink status is not displayed).
e.g.: An ink cartridge was once used in another printer.
A current ink cartridge is removed from the printer. -> A new ink cartridge is installed. ->
The removed ink cartridge is installed again after removing the new ink cartridge.
- Due to the specific print pattern, the actual remaining ink level does not match the indicated
remaining ink level.
This is because a detection error can be large in specific print patterns (such as continuous
printing using any one of the BK /CL of ink or continuous solid printing, etc.).
HS normal approx. 55.0 dB, Quiet approx. 46.9 dB
Sound quality changes, and sound becomes quieter.
Slows.
CL cartridge: The remaining ink level is detected by total counted
dot values of CL three colors.
Displayed on the Status Monitor (at 4 levels listed below for each BK/CL ink
cartridge)
Level 1: Approx. 70% of ink remaining
Level 2: Approx. 40% of ink remaining
Level 3: Indication of "!" mark (Remaining ink level is low)
Level 4: Indication of "X" mark (No ink remaining)
Note: Remaining ink detection function displays the status only, and does not
cause errors.
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 CL three colors of ink
-> As the remaining ink level is calculated by the counted dot value of the
least remaining ink of the CL three colors, if any of the C/M/Y inks is
heavily consumed, the margin of error for remaining CL ink increases.
When printing continuously using Black ink only
-> As refilling ink in the ink tank becomes slow, ink flow channel is cut off, and
ink in the ink tank cannot be finished up, the margin of error for remaining
BK ink increases.
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