INK SUPPLY UNIT
J001/J003 6-16 SM
6.4.4 INK SUPPLY PUMP
The ink supply pump is divided into two compartments:
[A]: M/Y compartment (for Magenta, Yellow Print cartridges)
[B]: K/C compartment (For Black, Cyan Print cartridges)
Each compartment contains:
• 1 supply motor [C]
• 2 pumps [D] (one pump for each Print cartridge)
• 2 cams [E]
• 1 One-way clutch (not shown)
When a print head tank needs ink:
• The printer switches on the supply motor. The motor and its worm gear rotate
forward or backward. (Only one pump can operate at a time.)
• A one-way clutch engages and drives the shaft to operate the cam that
repeatedly strikes a pump arm to siphon ink from the cartridge.
• The supply motor operates long enough to pump the prescribed amount of ink to
the tank. Then it switches off.
G707D918.BMP
Ink Supply Pump Unit: Rear View
[A]
[B]
[D]
[E]
[C]
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