NEC LL030F User Manual page 199

6. Remove the front bezel of the magazine operating panel.
Remove it by pushing the left lock.
7. Unfasten the controller board screw and pull the controller board towards you.
8. Replace the controller board with a new one, fasten the screw, and then mount the front bezel and
rack ear L using the opposite procedure to the procedure used to demount them.
9. Turn on the power to the library.
10. Fault LED lights up after turn on the power to the library, and it is displayed on an operator panel
as "UNMATCHED MAINT DATA ERROR."
11. Restore the maintenance information, referring to "10.1.2 Restoring Maintenance Information".
12. Since it is displayed as Unit information was restored successful, turn off and turn on the power
supply of a library.
13. Perform library diagnostics, referring to "9.2
Screw
Diagnosis test
".
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