Canon W6200 Service Manual page 124

W6200
a) Ink supply from ink tank to ink supply valve
The ink tank contains ink which is supplied to the printhead.
Ink flows from the ink tank to the ink supply valve due to the fluid level difference.
b) Ink inflow from ink tank to sub buffer
Although ink flows from the ink tank to the sub buffer due to the fluid level
difference, air also enters from the air passage of the sub buffer to maintain the
pressure inside the ink tank at a fixed level. If the ink inside the sub buffer exceeds
a certain level, the ink passes through the air passage and flows to the maintenance
cartridge.
c) Ink supply from ink supply valve to printhead
Ink is supplied from the ink tank to the printhead by opening the ink supply valve,
capping the heads, and then driving the suction pump. The ink removed from the
caps flows to the maintenance cartridge.
d) Ink supply during printing
During the printing operation, ink is constantly filling the printhead from the ink
tank due to the negative pressure applied to the printhead nozzle by the opening of
the ink supply valve and discharging of the print ink.
Waste ink removed by the cleaning operation and waste ink in the maintenance jet
tray flows to the maintenance cartridge.
CAUTION
If all of the ink passages are opened (ink tank is not installed, ink supply
valve is opened, and printhead lock lever is opened) when ink fills the ink
tube, the ink in the ink tube may reverse-flow due to the difference in the
water head, and ink may leak from the ink supply needle. Therefore, do
not open all of the ink passages at the same time when the ink tube is
filled with ink.
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Part 4: Technical Reference