Canon PIXMA MX340 Simplified Service Manual page 19

When all the 31 buttons are pressed, the color pattern is displayed on the LCD.
3) Press the OK button. The printer returns to be ready for selection of another function.
< Ink absorber counter setting >
Set the ink absorber counter value to a new EEPROM after the logic board is replaced in servicing.
1) Before replacement of the logic board, check the ink absorber counter value in EEPROM
information print.
2) In the Ink Absorber Counter section of the Service Tool, select Main from the Absorber
pull-down menu.
3) From the Counter Value(%) pull-down menu, select the value (in 10% increments) which is the
closest to the actual counter value confirmed before replacement of the logic board.
4) Click Set.
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