Canon W8400 Series, Service Manual, Page: 66 / 224

Chapter 2
2-16
c) Ink supply
The suction pump of the purge unit [1] operates in coordination with the ink supply valve to deliver the ink in the ink tank to the printhead during the initial
refilling and ink level adjustment.
F-2-15
2.3.2.5.2 Structure of purge unit
0009-1515
a) Caps
The caps are used to cap the nozzle arrays on the printhead during the capping and cleaning operations. The rubber section of the cap touches the face plate
of the nozzle array. Each printhead (six nozzle arrays) installed in the carriage has two caps.
During printing Scan interval during printing Maintenance jet Bk 1 nozzle Bk/M/
Y 26 shots other 10
shots Bk 1 nozzle
26 shots
After printing
ends When printing ends maintenance edge Approx. 0.02g
When "Head
Cleaning" menu
is selected Manual cleaning (Head Cleaning A) Cleaning 1 (normal
cleaning) Approx. 1g
Manual cleaning (Head Cleaning B) Cleaning 6 (normal
(strong) cleaning) Approx. 6g
When "Replace
P.head" menu is
selected After printhead replacement Cleaning 2 (ink level
adjustment cleaning) +
Cleaning 4 (ink extraction
during head replacement) Bk approx 24g
MBk approx 18g
When "Move
Printer" menu is
selected When Move Printer is selected from the Main
Menu Cleaning 5 (ink extraction
during secondary transport) Approx. 38g
After power ON at secondary installation Cleaning 10 (ink filling
after secondary transport) Approx. 37 to 105g
When "Change
Bk Ink Type"
menu is selected When Ink Change Menu is selected (before
ink replacement) Cleaning 11 (sub-buffer ink
extraction) Approx. 10g
When Ink Change Menu is selected (after ink
replacement) Cleaning 12 (ink change) Approx. 10g
Printer Status Cleaning Description Consumption
(reference)*1
[1]