Canon MP638 Service Manual page 36

2) Operation panel / Easy-Scroll Wheel
No Part name
Easy-Scroll Wheel
8
base
1 drop = 9 to 18 mg
(4) Ink absorber counter setting
Before replacement of the logic board, check the ink absorber counter value, and register it to the replaced new logic board. (The value can be
set in 10% increments.)
In addition, according to the ink absorber counter value, replace the ink absorber (ink absorber kit). When the ink absorber is replaced, reset the
applicable ink absorber counter (to 0%).
- How to check the ink absorber value and the way to set the ink absorber counter:
See 3-3. Adjustment / Settings, (6) Service mode, "Ink absorber counter setting."
Where to apply grease / oil
Easy-Scroll Wheel sliding portions
<3-3. Adjustment / Settings, (1) to (4)>
Drawing
Grease
No.
(8) Floil KG107A
34 / 45
Grease Number of
amount drops x
(mg) locations
9 to 18 ---