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TM 11-5820-890-30-5
6-13. OPERATIONAL CHECK. Continued
Step 1. SELF-TEST.
Action
a. Connect equipment as shown in figure 6-7.
b. Set 28 V: ON.
c. Check DIM control operation by adjusting
it ccw and then cw.
Step 2. OUTPUT CHECK.
Action
a. Read scope CHAN: A.
T: 0.2 ms/DIV V: 0.2 V/DIV
b. Set RESPONSE: 9.
Read scope CHAN: A.
c. Set RESPONSE: 10.
Read scope CHAN: A.
Response
a.
b.
All
No response.
Control-monitor repeats self-test every
5 seconds. All display segments light
for 3 seconds and then “Gd” is displayed
for 2 seconds.
IF
THEN
—
display segments
Go to chart 1.
do not light.
Any display segment
Control-monitor
does not light.
front panel (7A1)
is bad.
Display is stuck with all
Go to chart 2.
segments lit.
"F1" is displayed.
Microcontroller
(7A2) is bad.
"F2" is displayed.
Go to chart 3.
c. Ccw dims the display, and cw brightens
the display. If not, the control-monitor
front panel (7A1) is bad.
Response
a. Burst of 0.8 to 1.8 V p-p, 0 V dc,
referenced sine wave every 5 seconds.
If not, go to chart 4.
b. Same as in step 2 a. If not, go to chart 4.
c. Same as in step 2 a. If not, go to chart 4.
6-12
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