Epson Stylus Pro 7400 Service Manual page 311

EPSON Stylus Pro 7400/7800/9400/9800
4. Open the Valve No.2 and No.3 to reduce the pressure inside the measurement
jig.
5. Check that "0.0" kPa is displayed on the gauge.
6. Close the Valve No.3 and pull the piston head of the syringe.
Adjustment
Connected to the Measurement Cartridge inserted
into the cartridge slot of the printer.
Valve No.2 (close)
Mechanical Adjustment
"0.0" kPa must be displayed
Valve No.3 (close)
Syringe with its piston pulled fully
Figure 5-20. Air Leak Check (1)
Revision B
Green Button
311