Canon PIXMA MP640, Service Manual, Page: 6 / 57

1-2. Customer Maintenance
Adjustment Timing Purpose Tool
Approx.
time
Automatic print
head alignment - At print head replacement
- When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine
buttons
- 1 sheet of Matte
Photo Paper
(MP-101)
- Computer (MP
driver)
5 min.
Manual print head
alignment - At print head replacement
- When print quality is not satisfying
(uneven printing, etc.)
To ensure accurate dot
placement. - Machine
buttons
- Computer (MP
driver)
10 min.
Print head
cleaning When print quality is not satisfying. To improve nozzle
conditions. - Machine
buttons
- Computer (MP
driver)
1 min.
Print head deep
cleaning When print quality is not satisfying, and not
improved by print head cleaning. To improve nozzle
conditions. - Machine
buttons
- Computer (MP
driver)
2 min.
Ink tank
replacement When an ink tank becomes empty. ("No ink
error" displayed on the monitor or on the
machine LCD, or short flashing of an ink
tank LED) To replace the empty ink
tank. --- 1 min.
Paper feed roller
cleaning - When paper does not feed properly.
- When the front side of the paper is
smeared.
To clean the paper feed
rollers of the selected paper
source (rear tray or
cassette). - Machine
buttons
- Computer (MP
driver)
2 min.
Bottom plate
cleaning When the back side of the paper is smeared. To clean the platen ribs.
(Feed the paper from the
rear tray.)
- Machine
buttons
- Computer (MP
driver)
1 min.
Scanning area
cleaning When the platen glass or document pressure
sheet is dirty. To clean the platen glass
and pressure sheet. Soft, dry, and
clean lint-free
cloth. 1 min.
Exterior cleaning When necessary To clean the machine
exterior, or to wipe off
dusts. Soft, dry, and
clean lint-free
cloth. 1 min.
3 / 54