New Technologies - Canon PIXMA MP170 Service Manual

1. NEW TECHNOLOGIES

(1) Paper thickness lever (at the bottom front of the machine)
The head-to-paper distance can be adjusted using the paper thickness lever.
<Possible problems with this function>
1) The ink cartridge rubs against the paper when the amount of paper curl is large.
=> Flatten curled paper (to less than 3 mm).
=> In print modes other than borderless printing, conduct printing in the print quality assurance area of the top
and bottom edges. (Top margin 38.3 mm, bottom margin 31.2 mm)
(2) Quiet mode
The machine has a quiet mode function.
Compared with the normal mode,
- Acoustic noise level: slightly lower. (HQ normal approx. 45 dB, Quiet approx. 43.0 dB)
- Audible overtone level: Sound quality changes, and sound becomes quieter.
- Print speed: Slows.
<Possible problems with this function>
1) The operation sound does not become quieter.
=> The audible sound becomes only slightly quieter.
2) Printing is slow.
=> Disable the Quiet mode.
(3) Remaining ink level detection function
The machine has a function to detect the remaining ink level.
<Detection method>
- Dot counting (counted for each BK / CL ink cartridge)
- For the CL cartridge, the remaining ink level is detected by total counted dot values of 3 colors of ink.
<Display method>
- 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.
<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:
i) When printing continuously using any one of the CMY colors of ink (CL ink detection error margin):
As the remaining ink level is calculated by the counted dot value of the least remaining ink of 3 colors,
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