Specifications

63. Power Tests
Check the ability of the TS-1777/VRM-l
to test power circuits as directed below.
a. Preparation.
(1) Insert the test probe tip in test jack
A, turn the selector switch to A,
and check to be sure that the
GREEN indicator lights.
(2) Connect the output of the 721A to
the test probe
b. Dc Test, +16- Volt.
(1) Turn the selector switch to A.
(2) Increase Transistor Power Supply
721A output voltage.
(a) The RED indicator should light
before +7.0 volts is reached.
(b) The GREEN indicator should re-
main lighted between +14.2 and
+17.6 volts.
(c) The RED indicator should light
and remain lighted above +17.6
volts .
c. Dc Test, +26-Volt.
(1) Turn the selector switch to 2.
(2) Increase the 721A output voltage.
(a) The RED indicator should light
before +10.0 volts is reached.
(b) The GREEN indicator should
light and remain lighted above
+20.7 volts.
d. Dc Test, +12-Volt.
(1) Turn the selector switch to 8.
(2) Increase the 721A output voltage.
(a)
(b)
(c)
The RED indicator should light
before +5.0 volts is reached.
The GREEN indicator should re-
main lighted between +10.5 and
+13.0 volts.
The RED indicator should light
and remain lighted above +13.0
volts .
64. Audio Tests
(fig. 34)
Check the ability of the TS-1777/VRM-1
to test audio circuits as directed below.
a. Preparation.
(1)
(2)
66
Insert the test probe tip in test jack
A, turn the selector switch to A,
and check to be sure that the
GREEN indicator lights.
Adjust the TS-382 F/U output fre-
quency to 1,000 cps and connect it
to the test probe.
(3) Connect the ME-30B/U across the
-
TS-382F/U output.
b. Position 3 Test.
(1)
(2)
(3)
Turn the selector switch to 3.
Adjust the TS-382 F/U for an output
of 1.4 volts ac as indicated by the
ME-30B/U. The RED indicator
should be lighted.
Increase the audio output to 2.85
volts. The GREEN light should be
lighted.
C . Position 4 Test.
(1) Turn the selector switch to 4.
(2) Adjust the TS-382F/U for an output
of 7.0 volts ac as indicated by the
ME-30B/U. The RED indicator
should be lighted.
(3) Increase the output of the TS-
382 F/U to 13.3 volts. The GREEN
indicator should be lighted.
d. Position 5 Test.
(1)
(2)
(3)
Turn the selector switch to 5.
Adjust the TS-382 F/U for an output
of 0.25 volt ac as indicated by the
ME-30B/U. The RED indicator
should be lighted.
Increase the audio output of the TS-
382 F/U to 0.49 volt. The GREEN
indicator should be lighted.
e. Position 6 Test.
(1) Turn the selector switch to 6.
(2) Adjust the TS-382F/U for an output
of 0.45 volt ac as indicated by the
ME-30B/U. The RED indicator
should be lighted.
(3) Increase the audio output of the TS-
382 F/U to 0.90 volt. The GREEN
indicator should be lighted.
f. Position 10 Test.
(1)
(2)
(3)
Turn the selector switch to 10.
Adjust the TS-382F/U for an output
of 0.11 volt ac as indicated by the
ME-30E/U. The RED indicator
should be lighted.
Increase the audio output of the TS-
382 F/U to 0.225 volt. The GREEN
indication should be lighted.
g. Position 11 Test.
(1) Turn the selector switch to 11.
(2) Adjust the TS-382F/U for an output
of 3.2 volts ac as indicated by the