TM 5-6350-264-14&P-10 NAVELEX EE 181-AA-OMI-110/E121 C-9412 T.O.  31S9-2FSS9-1-10 g. To remove fuse F1l, turn off switch S1 on top of power supply.  Grasp knob on top of fuse holder and unscrew about 1/4-turn. Pull knob straight out; fuse will come with it. Pull fuse out of knob. h. To install new fuse, insert end of fuse into knob of fuse holder.  Insert other end of fuse into holder, push down on knob, and screw in about 1/4-turn to lock.  Turn on switch S1 on top of power supply. i. To remove  status processor, turn off switch S1 on top of power supply.  Tag and disconnect Data Transmitter wires from TB6 and TB7.  Remove screws that secure Transmitter to standoffs in CU.  Be careful not to drop Transmitter inside CU.  Remove Data Transmitter.  Loosen two screws that secure plug P1 to bottom of status processor.  Pull plug P1 straight down to disconnect it.  Remove screws that secure status processor to top of CU enclosure and it will drop straight down. j. To install new status processor, position it under standoffs in top of CU.  Insert screws and tighten to secure status processor. Insert plug P1 into connector on bottom of processor, and push up.  Tighten screws to secure plug P1.  Position Data Transmitter over standoffs in CU and insert screws. Tighten screws to secure Transmitter. Connect wires to TB6 and TB7 in CU.  Turn on switch S1 on top of power supply. k. To remove PC boards from status processor, turn off switch SI on top of power supply.  To remove board Al through All, place thumb or finger under board ejector and lift up until board pops out of receptacle at back of status processor. Then grasp PC board and pull straight out. To remove board A12, CAREFULLY pull straight out to unplug it from PC board All. Ensure that pins on All are not bent or otherwise damaged. l. To install new PC boards Al through All, note that boards A1 through A6 are identical and may be installed in any slot, one through six.  Each of these boards are marked A1, 2, 3, 4, 5, 6.  PC boards A7 through All are all different and each board is keyed to fit only in the correct  slot. These boards are marked A7, or A8, or A9, or A10, or A11.  Turn all PC boards so that plastic board ejector is toward top.  Align board with guides at top and bottom of status processor.  Slide board straight in until it contacts receptacle at back of processor.  Then press firmly on board until it seats completely in receptacle.  To install a new A12 PC board, remove board A11. Align sockets on board with pins on PC board All.  CAREFULLY press A12 until pins are fully engaged in sockets.  Ensure that pins on All are not bent or otherwise damaged.  Install PC board A11.  Turn on switch S1 on top of power supply. m. To remove LATCH/NON-LATCH switch turn off switch S1 on top of power supply. Remove hex nut and lock washer from switch.  Push switch through hole in panel. Catch keyed washer when it drops out.  It may be necessary to cut one or two cable ties in order to pull switch out far enough to disconnect wires.  Tag wires and use a soldering iron of 50 watts maximum to remove wires from switch terminals. n. To install new LATCH/NON-LATCH switch, see figure 5-3 for switch terminal and wire identification.  Use a soldering iron of 50 watts maximum to connect wires to switch terminals.  Replace any cable ties that were removed for switch removal.  Place  keyed washer over switch.  Ensure that tang on washer projects forward so it will engage hole in panel under switch hole.  Insert switch through hole in panel from the rear. Place lock washer and hex nut over threaded portion of switch, and tighten hex nut to secure switch.  Turn on switch S1 on top of power supply. 5-123