Hola amigo, esto es lo que dice el manual:
[C55] ADF I/F is abnormal
(1) Check if the harness connecting the ADF control board and SLG board is disconnected or opencircuited.
(2) Check the circuits and connectors on the ADF control board, mainly IC1, IC2, IC5 and CN2 for shortand
open-circuits.
(3) Check the circuits and connectors on the SLG board, mainly IC1, IC5 and J7 for short- or opencircuits.
(4) Replace the ADF control board.
(5) Replace the SLG board.
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Podes intentar hacer un ajuste de los sensores asi:
Apaga la maquina
Presiona la tecla 0 y 5 y encendela
Pone el numero 356 presiona "Start"
Si te da error la falla esta en uno de los sensores del ADF
Si no te da error, apaga la maquina volvela a encender y fijate que pasa.
Saludos, Ariel.