Xerox ColorQube 9303 Series Service Manual page 1721

Figure 3 shows the ink reservoir attached to the inboard side of the marking unit.
Figure 3 Ink reservoir and umbilicals
The Ink reservoir requires AC and DC connections. Drive signals for the air solenoids come
from the Marking Unit Driver Board via PJ480 and PJ130. AC for the umbilicals and reservoir
heaters comes from the Marking Unit Heater Board.
ColorQube® 9303 Family
Figure 4
February 2013
Figure 4 Ink reservoir components
Umbilicals
The umbilical provides a flexible, heated distribution conduit between the melt reservoir and
printhead reservoirs. A total of 16 ink conduits and 4 air purge conduits are used to feed the
four printheads. Snapped to the melt reservoir end of the umbilical is a check valve unit, (CVU).
A gasket is placed between the CVU and the umbilical. During installations of the umbilical, a
gasket is placed between the CVU and the melt reservoir.
The Umbilicals are manufactured from a flexible, silicon-based material and contain eight
heated ink tubes to maintain the ink in a liquid state as it travels from the reservoir to the print-
heads. Each umbilical attaches to one of the carriages. Each carriage contains two printheads.
The upper carriage contains printheads 2 and 4, the lower carriage contains printheads 1 and
3. Figure 5
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Principles of Operation