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Purge System
Proper printhead operation is dependant on the correct operation of the purge system.
The purge system uses air pressure and a wiper blade to purge any debris or air
bubbles that may be obstructing the printhead nozzles. The waste ink that is expelled
during the purge is funneled into the waste tray. Following the purge, a wipe operation
is performed on the faceplate using the wiper blade. After the wipe, a cleaning page is
printed.
Wiper Blade
2.5 Sec
Purge Tube
Printhead
Purge Pump
s2424-042
To perform a printhead maintenance cycle, the printhead is first tilted away from the
drum to allow the wiper assembly to pass by. The wiper blade is then raised in front of
the printhead. The media path drive governs wiper movement when it engages a
clutch on the exit shaft of the printer. The purge pump applies pressure to the ink
reservoir for approximately 2.5 seconds. Valves in the reservoir seal when pressure is
applied. The pressurization ejects a small amount of ink from the jets. Following the
pressure purge, the printhead tilts into the wiper assembly and the wipe cycle begins.
The pump runs again with the solenoid for approximately 30 seconds, creating a
neutral balance between pressure and ink. The wiper blade lowers and wipes excess
ink from the jets into the ink waste tray. A proper purge covers the length of the waste
tray with a single layer of ink about 20 mm wide.
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WorkCentre C2424 Service Manual
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Troubleshooting
