Ink Supply System; I/C Cover Opening/Closing Switch - Epson Stylus Photo RX700 Service Manual

EPSON Stylus Photo RX700

2.2.8 Ink Supply System

The printer is of an off carriage type in which the ink cartridges are contained in the
right and left I/C Holder Assy.
By the Pressure Pump Assy, compressed air is sent through the Pressure Sensor Assy
to the Left Ink Duct Assy. From there, the air is supplied into the left ink cartridges
(x3) and through the Right Ink Duct Assy into the ink cartridges (x3) in the Right I/C
Holder.
The sent air presses the ink bag in each ink cartridge. The ink pushed out is supplied
through the Left/Right Ink Duct Assy → Ink Tube Assy → Valve Assy to the
Printhead.

2.2.8.1 I/C Cover Opening/Closing Switch

Function: Detection of I/C Cover opening/closing
(appropriate one of the following operations is performed)
I/C Cover is closed: Warning is displayed on the LCD or PC monitor.
I/C Cover is open: Printing operation is continued.
Detector specifications
Item
Detection method Mechanical contact detector by MIK Electronic: MPU10980MNB0
Drive voltage 3.3 V ± 5%
Electrical
Rated current 0.6 ~ 1 mA
characteristics
Contact resistance 500mΩ
Detected Condition
I/C Cover is closed
I/C Cover is open
Note : When the I/C Cover Switch has opened (signal has turned H) during printing,
"Cartridge cover open error" is displayed.
Operating Principles
Specifications
Switch Mode I/C Cover Switch Signal
Closed L
Open H
Mechanism Operating Principles
Valve Assy (including Ink Tube Assy)
Printhead
I/C Holder Assy
Ink Cartridge
Pressure Sensor
Figure 2-27. Ink Path
Revision A
Pressure Pump
36