NAVELEX EE 181-AA-OMI-110/E121 C-9412
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.
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.
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.
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.
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
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.
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.
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.