NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
If meter indicates 18.5 to 21 vdc on one
switch terminal, but not the other, re-
place mode switch.
(1) To remove mode switch, turn off
switch S1 on top of power supply.
Remove large hex nut that secures
switch mounting bracket to inside
of CU door. Remove switch and
mounting bracket together. Be
careful not to lose switch arm be-
cause it is not secured to switch
shaft. Remove spacer and lock
from door so no items will be lost.
Remove small hex nut and lock
washer that secures mounting brac-
ket and switch stop to switch shaft.
Remove mounting bracket and
switch stop. Note that mode
switch is a three deck switch. Tag
wires and use soldering iron of 50
watts maximum to remove them
from switch terminals.
(2) To install new mode switch, use a sold-
ering iron of 50 watts maximum to
connect wires to switch terminals.
Slip mounting bracket and switch
stop over switch shaft. Ensure that
notch in mounting bracket fits over
tab on switch body, and that the
tang on switch stop engages notch
in mounting bracket. Secure brac-
ket and stop to switch with lock
washer and small hex nut. Insert
lock through hole in CU door, and
slip spacer over lock. Slip switch
arm over switch shaft. Ensure that
arm is aligned with tang on switch
stop. Place large hex nut inside
switch mounting bracket; slip brac-
ket over lock. Engage switch shaft
in lock. Tighten nut to secure
If both meter indications in step g are cor-
rect, turn off switch S1 on top of
power supply and remove PC boards