4 Parts Replacement RJ-901C/RJ-900C Maintenance Manual4-164.3 Replacement of Board Base Section ComponentsThis section describes replacement procedures of power board assembly, main board assembly, networkinterface card (NIC), and cooling fan.CAUTIONWhen you handle a circuit board, do not touch any elements on it with bare hands.Doing so may cause electrostatic discharge and damage the elements.4.3.1 Replacing Connector Panel, Network Interface Card (NIC),Cooling Fan(1) Replacing NIC1. Remove the bracket network interface card screw (tapping screw M3 × 6, S cup: 1pcs).2. Remove the NIC from the main board and replace it.(2) Removing Connector Panel1. Remove the cooling fan (5V) connector.2. Remove the cooling fan (5V) cable from the clamp.No. Part name1 Connector panel2 Bracket network interface cardscrew3 NIC2 31
