FAQ

what is the fault source of characters in the display of the fuel dispenser are unsharp?

what is the fault source of characters in the display of the fuel dispenser are unsharp?

 

Check whether or not symmetrical square waves are fed to the LCD liquid crystal. In most cases, the cause lies in the damage to 

peripheral cells of integrated circuit 4060 and drive chip 74HC14.

 

The solution:

 

 

Replace the integrated package 4060 or 74HC14 first. If no go, check its peripheral circuit or replace the display board.