Essilor AKR 750 - 7-3 EEPROM Fault Troubleshooting

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7-3 Error message ‘EEPROM fault’ appears.
The main causes when the error message ‘EEPROM fault’ appears:
・ Failure of the optical control board
・ Failure of the EEPROM board
Replace the optical control board.
Does the message still appear?
Replace the optical unit ASSY.
Does the message still appear?
NO
YES
NO
YES
Replace the main control board
OK
‘EEPROM fault’ is displayed.