Ink Supply Mechanism - Epson Stylus PRO 7500 Service Manual

EPSON Stylus Pro 7500

2.2.4 Ink Supply Mechanism

In this printer, there is an ink holder on the left side (I/H) where 6 ink cartridges, one of each
color, (from the left), K, C, M, Lc, Lm and Y, are installed. A projection and unique
markings are placed on each color ink cartridge case to prevent wrong insertion so that the
wrong color cartridge is not inserted and so the cartridge is inserted in the right direction.
NOTE: This printer does not use the ink valves which are used in the Stylus Pro
9000 and Stylus Pro 9500. Therefore, if you are transporting the printer,
in order to prevent ink from leaking from the ink channel, all the ink
should be discharged by running the Inter-User Transport Mode, then
carrying out parking and transport.
Ink cartridge
Figure 2-13. Ink Supply Mechanism
The ink flow is as shown below.
Each color's ink cartridge -> Each color's I/H (Ink Holder) -> Each color's ink tube -> Each
color's head dumper (carriage) -> B and C Print Heads
The following sensors are mounted in each color's I/H (Ink Holder).
Operating Principles
Ink cartridge holder
Print Mechanism Components
o
Ink Cartridge (I/C) Detection Sensor
This sensor uses a microswitch to detect when the ink cartridge is installed.
I/C Installed state (Present):Switch closed
I/C Not Installed state (None): Switch open
o
Ink End Detection Sensor
This sensor uses a mechanical switch to detect the amount of ink remaining in
each ink cartridge. Through a detection flag which changes according to the
amount of ink remaining in the ink pack inside the ink cartridge, the switch is
turned ON or OFF, and thus carries out detection.
Revision A
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