Micro Absorbing Operation; Counterandtimer; Flushing Counter; Cl Counter K - Epson Stylus 800 Service Manual

Stylus 800+ Service Manual

2.4.1.9 Micro Absorbing Operation

Once the ink cartridge is installed, if it is removed from the printer, a small amount of air may get
into the ink path in the form of tiny bubbles. Such small air bubbles block the ink path and act as
an obstacle to ink ejection from the nozzle. This operation elirnina tes any small air bubbles from
the printhead cavity.
1. Printer performs the false absorbing operation.
2. Printer performs the micro absorbing operation.
2.4.2 Counter and Timer
The 93C46 EEPROM (IC1O) on
control of ink system operation.
2.4.2.1 Refresh - I Timer
This timer is used to prevent an increase in the viscosity of ink in the nozzle. It counts every 20
seconds during the printing operation. It resets when:
The flushing operation completes preceding printing.
The refresh - I operation completes.
2.4.2.2

Flushing Counter

The flushing counter consists of the following counters.
Ink level counter R
Combined print counter N

CL Counter K

2.4.2.3
This counter is used to switch cleaning operation mode, to prevent an excessive ink drainage. The
counter value is changed when CL1 or CL2 cleaning operation is performed.
2.4.2.4

Protect Counter

There are four protect counters to manage the amount of ink draining to the waste ink drain tank.
The value of these counters is stored in the EEPROM on the main board at power off.
This counter is used to manage the total amount of drained ink. If the
Protect counter A
counter value is equal to or exceeds 16000 (A > 16000), the printer indicates
an error on the control panel and maintenance is required.
This counter prevents excessive ink drainage to the waste ink drain tank by
Protect counter B
limiting the total number of the initial charge operations. If the operation is
selected when the counter value is equal to or exceeds 10 (B> 10), the printer
only performs the false charging operation.
This counter is used to prevent a continual initial charge operation. If the
Protect counter C
operation is selected while the counter value is 1 (C = 1), the printer only
performs the false charging operation.
Ink counter R This counter counts the amount of ink inside the cap.
Rev. A
the main board stores certain counter and timer values used for
This counter indicates the amount of ink that exists in the cap, in
proportion to the number of flushing operations. When the counter
value exceeds or equals 3000 (R 2 3000), the printer performs the
false absorbing operation.
This counter is used to keep a wet condition inside the cap.
The flushing operation is performed based on the counter N value at
the flushing position, when the printer is in the standby state.
Operating Principkw
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