Epson Stylus Pro 4450 - Dumper; I;H Lever Sensor; Ink Route Inside of Dumper

EPSON Stylus Pro 4400/4450/4800/4880/4880C Revision C
Operating Principles Printer Mechanism Components 119
 Dumper
The dumper is equipped with a valve to prevent reverse flow of ink, and
when this valve opens the ink inside the ink storage space within the
dumper flows and is supplied to the Print Head. Numbers though in
the figure explain the ink flow sequence inside the dumper.
Figure 2-4. Ink Route inside of Dumper (1)
Figure 2-5. Ink Route inside of Dumper (2)
 I/H lever sensor
The left I/H and right I/H each have 1 I/H Lever Sensor located on the side.
This sensor uses a reverse tension switch (mechanical contact) to detect
whether the ink cartridge is set or released by the ink lever.
Figure 2-6. I/H Lever Sensor
BackFront
1
2
5
4
3
Valve Close Valve Open
I/H Lever Sensor (Left)
I/H Lever Sensor (Right)