When a background switching malfunction occurs, "F" and "4" will display
alternately on the function number display panel of the scanner.
Wipe the top and bottom glasses located inside the ADF with the Cleaner F1
and check if the problem persists.
If turning on the scanner again does not recover the situation, then follow the procedures provided below:
1 Does the same symptom occur after turning OFF and ON the scanner? Press power button of the scanner for more than 2 seconds to turn it OFF, and after more than 2 seconds elapse, press the power button to turn the scanner ON.
2 Are the cables between the Control PCA and the BW Motor damaged? Or are the connectors connected correctly?
3 Is the white reference work properly? If not, then replace the BW Motor.Perform background changeover test.
4 Is the OPT Unit installed correctly? Check ADF (Front) and ADF (Back)
5 Replace the Control PCA and see if the error is resolved.
6 Replace the OPT Unit and see if the error is resolved.
Hope the above information is helpful.
Thanks,
ScanCare
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