A main board (logic board) in a inkjet printer plays it main role as a control center of the inkjet printer operation.

It arrange all of mechanical systems (such as paper feeding system, purging system,etc) and electrical systems (such as sensor,heater,carriage unit,motor driver,data transfer to and from computer,etc).

The logic board provides important data (EEPROM data) that contains data such as: page counter, time setting, waste ink absorber counter, error code history, etc.
The data that stored by the logic board is very useful for troubleshooting the printer problems.

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