NAVELEX EE 181-AA-OMI-110/E121 C-9412
Table 5-2. Troubleshooting Procedures - Continued
(S3), terminal 2-1, and negative lead to
chassis (ground). Meter should indicate
20 1 vdc.
If meter indicates less than 0.5 vdc,
replace 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. Re-
move switch and mounting bracket
together. Be careful not to lose
switch arm because 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
bracket 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 a soldering iron of
50 watts maximum to remove them
from switch terminals.
(2) To install new mode switch, use a
soldering iron of 50 watts maxi-
mum 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 bracket and stop
to switch with lock washer and
small hex nut. Insert lock through
hole in CU door; 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 mount-
ing bracket; slip bracket over lock.
Engage switch shaft in lock. Tighten
nut to secure switch.