TM 11-5821-333-30
]6-20. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 13. REFERENCE RT/RCU UUT INTERFACE CLOCK AND DATA TEST
Presets:
SET ECCM FILL DEVICE TO OFF, AND
SET REF RT–
DISCONNECT FROM REF RT.
FUNCTION: SQ ON
MODE: SC
a. Use logic probe to check J6-A when ref rt
a.
FUNCTION switch is turned from SQ ON to
TEST.
b. Repeat for J6-D, -G, and -T.
b.
Logic probe shows digital signals are present
during self-test.
If not, go to chart 9.
Logic probe shows digital signals are present
on each during self-test, (Pulse at J6-T is of
short duration. Use memory on logic probe. )
If not, go to chart 9.
Presets:
SET REF RT AND REF RCU–
CONNECT TEST CABLE W12 FROM J2 TO J6.
FUNCTION: OFF
PRESET: MAN
Set ref rt FUNCTION switch to SQ ON.
Ref rcu display reads “30000”.
If not, go to chart 10.
Step 15. REFERENCE RCU TEST
Presets:
I
SET REF RT FUNCTION SWITCH TO OFF.
SET TEST ADAPTER–
TAKE CTRL (S9) : RCU
TEST EQPT INPUT (S14) : EXT
TEST EQUIPMENT SELECTOR (S15) : DMM
a. Set ref rcu FUNCTION switch to Z-A then
a. Ref rcu display read:
TEST.
" - - - - -“ for 3s (ref rt is “30000”)
“ E
-” for 2s
“8 888 8“ for 7s
“Good” for 8s
If not, go to chart 11.
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