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TM 11-5820-890-30-5
6-13. OPERATIONAL CHECK. Continued
Step 3. CONTROL FUNCTION CHECK.
Action
Response
a. Set FCTN: RF.
a. CONTROL S is lit, all others blank.
IF
THEN
—
CONTROL M is lit with all
Go to chart 5.
others blank.
Any other display is seen.
Go to chart 6.
b. Set FCTN: MODE.
b. CONTROL S is lit, all others blank. If not,
go to chart 7.
c. Set FCTN: VAR.
c. CONTROL S is lit, all others blank. If not,
go to chart 7.
d. Set FCTN: CONTROL.
d. CONTROL S is lit, all others blank. If not,
go to chart 8.
e. Set INIT to UP and then release it.
e. “Er” is displayed while INIT is UP. If not,
go to chart 9.
f. Set INIT to DN and then release it.
f. CONTROL M is lit briefly, “Fr” is displayed
for 2.5 seconds, and then CONTROL S is lit.
If not, go to chart 10. If “Er” is displayed,
go to chart 8.
g. Set RESPONSE: 7.
g. Scope CHAN: A displays digital data pattern
Read scope CHAN: A when INIT is set to
for about 0.9 seconds and then logic "1".
DN and then released.
If not, go to chart 11.
T: 10 ms/DIV
V: 5 V/DIV
h. Set 28 V: OFF.
h. Control-monitor runs 1 test cycle and then
Set LOGIC: 3.
CONTROL M is lit, all others blank.
Set 28 V: ON.
If not, go to chart 12 node
i. Set 28 V: OFF.
i. Control-monitor runs 1 test cycle and then
Set LOGIC: 4.
CONTROL M is lit, all others blank.
Jumper TP4 to TP5.
If not, go to chart 12.
6-14
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