OKIFAX 5700/5900 4 - 104.3.5 NCU BoardRemove the NCU board by unscrewing twoscrews.Caution: Earth cable position is differentfrom each machine version.4.3.6 MODEM Board1. Remove the plate by unscrewing twoscrews (1).2. Remove the MODEM board by un-screwing one screw (2).NCU boardEarth cableTwo screwsEarth cableScrew 2Two screws 1Plate