TM 11-5841-287-30
ON/OFF switch to ON and the MODE SELECT switch to
and B is similar to that shown in view C of figure 3-18
MODULE TEST ENC Verify that the MODE/POWER
(18) Connect channel A of the oscilloscope
MODULE TEST ON green indicator lamp is illuminated.
between test points J1-F and J1-22 (gnd).
(19) Connect channel B of the oscilloscope
NOTE
between test points J1-D and J1-22 (gnd)
The MODE/POWER SHORT red
(20) Verify that the display on channels A
indicator lamp will be illuminated at this
and B of the oscilloscope is similar to that shown in view
time, but will be extinguished when the
D of figure 3-18
digital tester UUT POWER switch is set
(21) Remove A17 program card no 2 from
to the ON position in the following step.
the card reader slot on the digital tester
(4) On the digital tester, set the POWER
(22) Insert A17 program card no 3 (SM-A-
and UUT POWER switches to the on positions (up).
942440-3) into the card reader slot
Verify that the red indicator lamps for these swatches are
(23) On the digital tester load the program
illuminated and the MODE/POWER SHORT lamp is off.
on the A17 program card no 3 into the digital tester
(5) On the digital tester, load the program
memory by pressing the PROGRAM ENTER switch to
on the A17 program card no. 1 into the digital tester
the down position
memory by pressing the PROGRAM ENTER momentary
(24) Verify that the READY/ERROR white
switch to the down position
indicator lamp on the digital tester illuminates when the
NOTE
program has been entered.
The PROGRAM ENTER red indicator
(25) Depress the CONT TEST switch on
lamp will be illuminated during the
the digital tester
program enter period.
(26) Using the DVM for indication, adjust
(6) Verify that the READY/ERROR white
power supply PP-3940/G for + 1.0 + 0.1 volt.
indicator lamp on the digital tester illuminates when the
(27) Connect the negative lead of the power
program has been entered.
supply to test point J1-22 (gnd) and the positive lead to
(7) Refer to figure 3-17 for test point
test point P1-14.
locations and connect channel A of the oscilloscope
(28) Connect the positive lead of the DVM
between test points J1-P and J1-22 (gnd).
to test point J1-N and the negative lead to J1-22.
(8) Connect channel B of the oscilloscope
(29) Verify that the indication on the DVM is
between test points J1-N and J1-22 (gnd)
greater than + 2.5 volts
(9) Depress CONT TEST switch on the
(30) Reverse the leads of the power supply
digital tester. Verify that the display on channels A and B
so that a negative voltage will be applied to P1-14.
of the oscilloscope is similar to that shown in view A of
(31) Verify that the DVM indication is less
than + 0 4 volt.
(10) Connect channel A of the oscilloscope
(32) Remove the power supply leads from
between test points J1-17 and J1-22 (gnd).
the circuit card under test and adjust the power supply
(11) Connect channel B of the oscilloscope
voltage for +2 0 volts. If the leads were reversed at the
between test points J1-S and J1-22 (gnd)
power supply (step 30, above), return them to the proper
(12) Verify that the display on channels A
outputs
and B is similar to that shown m view B of figure 3-18
(33) Connect the negative lead of the power
(13) Remove A17 program card no. 1 from
supply to test point P1-7 and the positive lead to J1-22.
the card reader slot on the digital tester.
(34) Connect the DVM between test points
(14) Insert A17 program card no 2 (SM-A-
J1-D and J1-22 (gnd).
942440-2) into the card reader slot
(35) Verify that the DVM indication is
(15) On the digital tester, load the program
greater than + 2 5 volts.
on the A17 program card no. 2 into the digital tester
(36) Remove the power supply leads from
memory by pressing the PROGRAM ENTER momentary
the circuit card under test
switch to the down position.
(37) Set the POWER switches on the
(16) Verify that the READY/ERROR white
equipment to their off positions Remove the circuit card
indicator lamp on the digital tester illuminates when the
under
program has been entered
test and the program card from the test setup
(17) Depress the CONT TEST switch on
the digital tester and verify that the display on channels A
3-47
Previous Page
