7-6 Keysight N5224A/25A Service GuideRepair and Replacement ProceduresRemoving the Covers7-Removing the CoversTools Required— T-10 TORX driver (torque to 9 in-lb or 1.02 N.m)— T-20 TORX driver (torque to 21 in-lb or 2.38 N.m)Removing the Outer CoverRefer to Figure 7-1 for this procedure.1. Disconnect the power cord.2. Remove the strap handles (item ①) by loosening the screws (item ➁),with a T-20 TORX driver, on both ends until the handle is free of theanalyzer.3. Remove the foot locks (item ③) from the four bottom feet (item ④) andthen remove the four bottom feet from the outer cover.4. Remove the four rear panel feet (item ⑤) by removing the center screws(item ⑥ with a T-20 TORX driver.5. Slide the outer cover toward the rear of the analyzer and remove it.Removing the Inner CoverRefer to Figure 7-1 for this procedure.1. With a T-10 TORX driver, remove the 24 pan head screws (item ⑦).2. With a T-10 TORX driver, remove the 9 flat head screws (item ⑧).3. Lift off the cover.Replacement Procedure1. On the top side of the PNA, carefully position the grey flex cables so theycan’t be pinched between the covers and the rails.2. On the bottom side of the PNA, carefully fold or push down the ribboncables and wires so they can’t be pinched between the hardware and theouter cover. Ribbon cables and wires must never be positioned on top ofhardware.3. Reverse the order of the removal procedures above.This procedure is best performed with the analyzer resting on its fronthandles in the vertical position. Do not place the analyzer on its front panelwithout the handles. This will damage the front panel assemblies.
