TM 11-5821-333-30
6-20. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 19. RT-1477 FRONT PANEL TEST, Continued
g. Set ECCM fill device–
g. No response.
Function: ON
Select: T1 or T2
h. Set ref rcu–
FUNCTION: Z-A then LD-V
PRESET: 1
IFM-RF PWR: OFF
MODE: FH
i.
On ref rcu, press H-Ld.
j.
Turn
from
Step 20.
ECCM fill device off and disconnect
RT-1477.
HOLD-UP BATTERY CIRCUITRY TEST
h. No response.
i.
Ref rcu display reads:
“ LOAd “
“ Sto t “
“ FILL 1“
If not, RT-1477 front panel is bad.
j.
No response.
I
NOTE :
THIS TEST ASSUMES A HOLDING BATTERY IS INSTALLED IN RT.
I
a. Turn ref rcu FUNCTION switch to OFF, wait
a. Ref rcu display reads “ FILL 1“.
7 seconds, and turn it back to LO-V.
If not, RT-1477 front panel is bad.
b. Go to step d.
b. No response.
c. Turn ref rcu FUNCTION switch to OFF, wait 7
c. Ref rcu display reads “Fnnn" (n = O-9).
seconds, and turn it back to LD.
If not, RT-1477 front panel is bad.
d. Set test adapter DC switch to OFF. Remove
d. No response.
RT-1477 front panel from rt chassis and in-
stall original front panel.
e. Disconnect test cables W1 and W2 from test
e. No response.
adapter and from rt. If ref rt was used for
these tests, install it in the test adapter.
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