Epson Stylus 820 Service Manual page 92

Stylus Color IIs / Stylus 820
5.5 Dot missing Trouble shooting Guide
This section describes how to recover the clogged nozzle when you receive the dot-missing printer.
Since the print head of this printer is the new system, it is very difficut to eliminate the invaded air bubble
from the print head unit or the ink cartridge so that, never use again if you remove once a ink cartridge from
the main unit.
Also, we prepair the special ink cartridge exclusive for your service side. Please refer to the under table for
low price ink cartridge.
Table 5-6. Ink Cartridge exclusive for the service side
Ink Cartridge
Black ink cartridge
Color Ink cartridge
Note: Please read throughly under the cautions before you start to repair.
Do not re-use a removed ink cartridge when you return the printer to your user.
Since the ink end sensor is counted by the firmwear counter, it is a possibility that the life of
brand-new ink cartridge can not be guranteed if you reuse the removed ink cartridge so that,
perform the EEPROM reset after replace the ink cartridge.
There are two reset methods for clear the EEPROM . Select a proper method referring the
Section 4.1.5.
Rev. A
WARNING 1
WARNING 2
WARNING 3
Troubleshooting
Code
1023206
1023207
5-7