Ink System Sequence - Epson Stylus COLOR 800 Service Manual

2.4.3 Ink System Sequence

The ink system sequences operated in this printer are combinations of the basic ink system operations
described in Section 2.4.1. The printer selects the most suitable ink sequence according to the information
provided by the various counters, timers, and flags. The major ink system sequences are described in this
section.
‰Manual Cleaning
Manual cleaning is performed by pressing the cleaning button on the control panel. The cleaning
mode is to be used is selected from following 5 modes according to the CL2 Counter value for KKB,
Kky (cleaning selecting counter) and number of the pages printed after the latest cleaning.
„ CL1 (Normal cleaning mode)
„ CL1'(Powerful cleaning mode) :
„ CL2 (Powerful cleaning mode) :
„ CL3 (False cleaning mode)
„ One time CL
CL2 counter is used to determine the cleaning mode to be performed when the forcible cleaning is
repeated. The counter is reset if the printer is turned off. The printer normally follows the order
CL1 CL1' CL2, which, however, can vary depending on the conditions, as described below;
†CL3 is selected if no image is printed after the latest cleaning.
†CL1 is selected if 5 pages or less is printed after the latest cleaning.
†CL1, CL1' or CL2 is selected according to the CL2 Counter value for Kkb, Kky under the
following conditions;
5 pages or more is printed after the latest cleaning, and the current ink cartridge is a
replacement of the old one which was removed according to the Ink End-Low error
indication.
†One time CL is performed under the following condition;
5 pages or more are printed after the latest cleaning, and the current cartridge is a
replacement of the old one which was removed without the Ink End-Low error indication.
‰Timer Cleaning
This cleaning is performed automatically based on the value for the CL Timer counter while the printer
power is On. This sequence, having 4 separate modes (Timer CL1, Timer CL2, Timer CL3, and Timer
CL4) for each black and color ink, differs from the manual cleaning modes in the basic ink system
operation sequence. It doesn't contain Ink Absorbing but Wiping and Micro Absorbing operations.
Therefore the consumed ink amount is a little compared with the manual cleaning.
‰Power ON Sequence
During this sequence, the printer performs the following:
†Refers to Protect Counter A.
†Resets CL2 Counter Kkb, Kky.
†Checks if the ink cartridges are installed.
†Checks consumed ink amount.
†Performs necessary cleaning based on the conditions such as Initial charging, HP status,
Power Off Timer, and CL timers.
†Resets Power off timer.
Rev. A
: Wiping, Ink Absorbing, Micro Absorbing, False Absorbing.
Wiping, Ink Absorbing, Micro Absorbing, False Absorbing.
The composed operations are same as for CL1, except the
amount of consumed ink.
Wiping, Rubbing Ink Absorbing, Micro Absorbing,
False Absorbing.
Every operation except for Rubbing is the same as for CL1'.
However, the amount of the consumed ink is larger than CL1'
: Wiping, Micro Absorbing, False Absorbing.
The amount of consumed Ink is very little since Ink Absorbing
is not operated.
: Wiping, Ink Absorbing, Micro Absorbing, False Absorbing.
The composed operations are same as for CL1, except the
amount of consumed ink. This cleaning mode consumes the
largest amount of ink.
Operating Principles
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