174 Power Amplifier Disassembly and Reassembly TB8100 Service Manual© Tait Electronics Limited September 20069.1 Screw Torque SettingsThe recommended torque settings for the screws used in the PA are asfollows:9.2 Removing the Airflow Duct and CoverThe circled numbers in the following instructions refer to Figure 9.1.Airflow Duct(100W PA Only) 1. Remove the M3 Torx screw b securing the P-clip and DC inputcable to the airflow duct.2. Remove the M3 Torx screws c securing the airflow duct to theheatsink. Lift the airflow duct off the heatsink.Cover 1. Remove the M3 Torx screws securing the cover to the heatsink andto the front panel.2. Remove the two M3 Torx screws securing the N-type connector tothe cover d.3. Carefully lift the cover straight up off the heatsink, being careful notto put any strain on the N-type connector.Location / Function Torque Driver Sizesecure the RF power transistors to the heatsink 0.6N·m / 5.0lbf·in 3/32in Allen key 4–40 UNCsecure the VHF splitter and combiner boards tothe heatsink0.23N·m / 2.0lbf·in PZ1 M2secure the SMA connector to the front panel 0.3N·m / 2.5lbf·in T8 M2.5M3 screws are used in all other locations 0.5N·m / 4.5lbf·in T10 M3
