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TM 11-5820-890-30-5
4-9.
OPERATIONAL CHECK. Continued
Step 2. POWER SUPPLY OUTPUT CHECK FOR AM-7239/VRC AND AM-7239B/VRC.
Action
Response
a. Set TEST EQPT INPUT: INT.
Set RESPONSE: 8. Read DMM.
b. Set RESPONSE: 9. Read DMM.
c. Set RESPONSE: 10. Read DMM.
d. Set RESPONSE: 11. Read DMM.
e. Set RESP SEL: S2.
Set RESPONSE: 7.
Read DMM.
f. Disconnect cable at J7 and move it to J8.
Read DMM.
g. Set TEST EQPT INPUT: EXT.
h. Use EXT probe to check voltage from
J9-F to GND. Read DMM.
i. Connect W5P5 to UUT J9 connector.
j. Set TEST EQPT INPUT: INT.
Set RESP SEL: S1.
Set RESPONSE: 8.
Set TEST EQPT SELECTOR: SCOPE (AC).
Read scope.
Set RESPONSE: 9.
Read scope.
Set RESPONSE: 10.
Read scope.
Set RESPONSE: 11.
Read scope.
a. DMM reading is 6.55 to 6.95 V dc. If not,
go to chart 8.
b. DMM reading is 12.6 to 13.4 V dc. If not,
go to chart 9.
c. DMM reading is 25 to 29 V dc. If not, go
to chart 9.
d. DMM reading is 180 to 220 V dc. If not,
go to chart 9.
e. DMM reading is 12.6 to 13.4 V dc. If not,
go to chart 10.
f. DMM reading is 12.6 to 13.4 V dc. If not,
go to chart 10.
g. No response.
h. DMM reading is 25 to 29 V dc. If not, go
to chart 10.
i. No response.
j. Each should have an ac ripple less than
100 mV p-p. If the ripple voltage is greater
than 100 mV p-p, the power supply (5A1)
is bad.
4-8
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