Canon MP970 Service Manual page 35

<Ink absorber counter resetting>
Reset the ink absorber counter (to 0%) when the ink absorber is replaced, or when necessary after the logic board is replaced.
1) In the service mode, press the Stop/Reset button 4 times, then press the ON/OFF button. The ink absorber counter value of the
EEPROM is reset to 0%.
2) The flag for resetting of the ink absorber counter is set to ON, and the ink absorber counter value is automatically printed from the
selected paper source.
("D=000.0" is printed at the top left of the paper.)
See 3-4. Verification Items, (2) Ink absorber counter value print, "print sample."
<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 service mode, press the Stop/Reset button 13 times, then press the ON/OFF button to enter the ink absorber counter setting
mode.
3) In the ink absorber counter setting mode, press the ON/OFF button again to enter the main ink absorber counter setting mode.
(Since the procedure for setting the ink absorber counter is common among all the models, this step is necessary to set the counter
value for the main ink absorber.)
4) The ink absorber counter value can be set in 10% increments by pressing the Stop/Reset button. Press the Stop/Reset button the
appropriate number of time(s) to select the value which is closest to the actual ink absorber counter value.
Time(s)
0 times
1 time
2 times
3 times
4 times
5 times
6 times
7 times
8 times
9 times
10 times or more
5) Press the ON/OFF button to set the selected value to the EEPROM. Print EEPROM information to confirm that the value is
properly set to the EEPROM.
<LF / Eject correction>
After replacement of the feed roller, logic board, or platen unit in repair servicing or in refurbishment operation, perform the
adjustment to maintain the optimal print image quality.
Details : Print the LF / Eject correction pattern on a sheet of paper. Select the Pattern No. (0 to 2) in which streaks or lines are the
least noticeable, press the Stop/Reset button the same number of time(s) as the selected Pattern No., then press the
ON/OFF button. (See the flowchart below.)
Note : At the production site, the E-MIP correction, which is equivalent to the LF / Eject correction, is performed using the special
tool, and the E-MIP correction value is written to the EEPROM as the valid data.
When LF / Eject correction is performed, the LF / Eject correction values become valid instead of the E-MIP correction
value (thus, in the initial EEPROM information print, "LF = *" and "EJ = *" are printed).
Ink absorber counter value to be set (%)
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
Not valid.
Press the ON/OFF button to return to the previous step.
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