258 Power Management Unit Disassembly and Reassembly TB8100 Service Manual© Tait Electronics Limited September 200614.9 Refitting the Top and Bottom Covers1. Refit the bottom cover over the front and rear panels and secure withthe four M3 Torx screws.Note The bottom cover cannot be fitted to the top of the PMU as themounting holes in the cover will not align with the holes in thefront and rear panels.2. Turn the PMU over and align the top cover over the front and rearpanels. Carefully slide the cover down until the locating tabs engagewith the bottom cover. Ensure that the fibreglass DC input insulatorsits inside the top cover.3. Push the top cover down firmly and secure with the four M3 Torxscrews.Note Both the top and bottom covers are symmetrical and can be fittedin either orientation.