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TM 11-5820-890-30-5
3-17. OPERATIONAL CHECK. Continued
Step 10. POWER SUPPLIES TEST.
CONNECT EQUIPMENT AS SHOWN IN FIGURE 3-7.
Action
a. Connect DMM (+) probe to UUT SYS con-
nector pin V and DMM (-) probe to TP12.
b. Set test adapter:
28 V: ON.
c. Connect DMM (+) probe to UUT SYS
connector pins X and x.
d. Connect DMM (+) probe to UUT SYS
connector pin W.
e. Set test adapter:
13 V: ON.
f. Connect DMM (+) probe to UUT SYS
connector pin Y and y.
g. Connect DMM (+) probe to UUT SYS
connector pin w.
—
h. Connect DMM (+) probe to UUT SYS
connector pin Z.
i.
Set test adapter:
LOGIC: 2
28 V:
OFF.
j.
Set DMM to measure resistance.
Connect DMM (+) probe to UUT SYS
connector pin U.
k. Connect DMM (+) probe to UUT SYS
connector pin T.
Response
a. DMM reads 26.5 to 28.5 V dc. If not,
go to chart 6.
b. DS1 lights. If not, go to chart 7.
c. DMM reads 26.5 to 28.5 V dc. If not,
there is an open in the wiring between
connector J15 and pins J11-X and x.
d. DMM reads 6.25 to 7.25 V dc. If not,
go to chart 8.
e. No response.
f. DMM reads 12.25 to 13.75 V dc. If not,
go to chart 9.
g. DMM reads 4.75 to 5.25 V dc. If not,
go to chart 10.
h. DMM reads 1.35 to 1.65 V dc. If not,
go to chart 11.
i.
No response.
j.
DMM reads less than 1 ohm. If not,
go to chart 12.
k. DMM reads less than 1 ohm. If not,
go to chart 13.
3-36
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