OfficeServ 7400 INSTALLATIONTECHNICAL MANUAL PART 7 MAY 20107.9RETAINING SCREWSRETAINING SCREWSFigure 7.10 Keyset BaseKDB-SLIThis daughterboard can be installed only in the DCS 12 or DCS 24 button keyset. Beforeperforming this procedure, unplug the line cord from the keyset and remove the base wedge.Place the keyset face down on a soft surface and remove the four base retaining screws (seeFigure 7.10). Separate the base from the keyset and place the keyset aside. Attach the KDB-SLIto the keyset base with the six screws that are supplied (see Figure 7.14). Take care to ensurethat the modular socket shows through the access hole in the base (see Figure 7.12). Invertthe base assembly over the keyset and plug the ribbon cable into the socket on the keysetPCB (see Figure 7.13) while making sure no damage occurs to the keyset PCB. Reattach thebase to the keyset and test to ensure normal keyset operation.