Epson Stylus pro 7700m, Service Manual

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2.4 INK SYSTEM MANAGEMENT
This section explains how the ink system is controlled to protect the printhead and the ink supply system and
to ensure high-quality output. Ink system control is composed of the following operations:
r Power On r Wiping Operation 1
r Cleaning Selection r Wiping Operation 2
r Micro Absorbing Cleaning r Rubbing Operation
r Power Off r Disengage On
r Print Start r Disengage Off
r Refresh r Micro Absorbing
r Standby r Carriage Lock Set
r False Absorbing r Carriage Lock Reset
r Ink Cartridge Replacement r Refresh (When loading or ejecting paper)
r Adjust Lever Operation Position Moving Sequence
r Transportation Sequence
These ink system operations are controlled by the following counter:
r Protect counter
2.4.1 Ink Operations
The various ink operations that can be performed selectively by the printer are described below:
1. Power On Operation
This operation is performed when power is turned on.
2. Cleaning Selection Mode
This operation cleans each nozzle to ensure that the nozzle fires and that no dots are skipped during printing.
This operation is performed by pressing the cleaning switch (Alt + Load/Eject or Economy/Condensed) while
the printer is in PAUSE status.
3. Micro Absorbing Cleaning Operation
This operation prevents an increase in the viscosity of ink in the printhead using ink absorbing discharge.
4. Power Off Operation
This operation ensures that the carriage is in the home position when the printer turns off, and prevents the
disengage gear from turning continuously when the printer turns off. This operation is performed when the
switch on the secondary side is turned off.
5. Print Start Operation
This operation eliminates ink from the nozzle surface, and is performed when the printer receives print data
while in the standby state.
6. Refresh Operation
This operation prevents an increase in the viscosity of the head ink.
7. Standby Operation
This operation also prevents an increase in the viscosity of the head ink.
8. False Absorbing Operation
This operation absorbs ink inside the cap, and eliminates ink from the nozzle plate.
9. Ink Cartridge Replacement Operation
Operating Principles Stylus Pro Service Manual
2-22 Rev.A