Epson Stylus Pro 4000 Field Repair Manual page 122

Stylus Pro 4000 Field Repair Guide
1. Check the following components of the ink supply for a minor restriction, causing partial starvation.
Note: Partial Starvation refers to a slight blockage of the ink supply system that slowly starves the Print
Head for ink.
1.1 Remove corresponding Damper and attempt to draw ink with a syringe. The ink should draw easily.
1.1.1 If ink can not be drawn easily, remove Damper and attempt to draw ink through the Tube. If ink can
be drawn easily, replace the Damper.
1.1.2 If Ink can not be drawn easily through the Tube, check the Ink Valve on the Cartridge Bay for
correct operation.
1.1.3 If the Ink Valve is working properly, replace the Tube.
All Nozzles Missing, One Color Only (The color does not comes back after a cleaning cycle)
1. Check the following components of the ink system for full starvation
1.1 Remove corresponding Damper and attempt to draw ink with a syringe.
1.1.1 If the Damper is empty, check for air leaks in the Tubes, Joints (O-rings and Fittings), or
Dampers.
1.1.2 If ink can not be drawn, remove Damper and attempt to draw ink through the Tube. If ink can be
drawn, replace the Damper.
1.1.3 If Ink can not be drawn through the Tube, check the Ink Valve on the Cartridge Bay for correct
operation
1.1.4 If the Ink Valve is working properly, replace the Tube.
All Nozzles Missing
Note: Steps 1 and 2 must be run in sequence.
1. Check the Pump's operation.
1.1 Run a cleaning cycle.
Missing Nozzle Diagnosis and Repair Printer Component, Software Item, LCD Display, Printer Button
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