Epson Stylus Pro 9000 Service Manual - Page 35

EPSON Stylus Pro 9000 INK-RELATED SENSORS The following sensors are located in the I/H compartment: I/H Assembly sensor This optical sensor detects the whether the door is open and the I/H Assembly is in the install position or the door is closed and the I/H Assembly is in the print position. When the I/H door is open, the signal = ON When the I/H door is closed, the signal = OFF Ink Cartridge sensor This mechanical sensor (microswitch) is built in all six ink cartridge slots. When the I/C is installed, switch = closed When the I/C is not installed, switch = open Ink Low sensor This mechanical sensor (microswitch) is at the bottom of all six ink cartridge slots and detects when ink is running out. When the I/C is nearly empty, the switch = open When the I/C is not low (normal), the switch = closed Ink ID sensor This optical sensor is located on the side of all six ink cartridge slots and detects which market the cartridge is for. Although not currently implemented, the sensor can also detect the type of ink (presently dye only) and any special color (if new colors are introduced in the future). The Ink ID sensor looks for the following marks on the ink cartridge. Market: No mark, white = Overseas/Global Ink type: No mark, white = dye-based ink Special color: No mark, white = N/A (may be available in future) Ink Cartridge Ink ID Sensor Ink Cartridge Sensor Ink Low Sensor Figure 2-13. Ink Cartridge Holder Sensors Technical Overview 35