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 TM
55-4920-430-13
time delay generator. These circuits measure transit response where a signal voltage is sampled and
measured at a predetermined time. This response test determines the accuracy of these signals from the
shaping networks by measuring them with a digital multimeter at AFCS receptacle 3.
a. Set the control switches to positions listed below.
b. Make connector and voltage measurement as listed below.
c. Set POWER switch to ON.
d. Set NORM ACCEL 12-52 switch to NORMAL.
NOTE
q When a test includes a requirement that an ac voltage be in-phase
or out-of-phase, oscilloscope channel A must be connected across
the digital multimeter. Oscilloscope channel B must be connected
to the ac source and the oscilloscope externally triggered from the
ac source.
q The plus sign (+) before an ac voltage indicates in-phase.
VOLTAGE
DIGITAL
MEASUREMENT/
STEP
CONTROL/SWITCH
MULTIMETER/
NOMENCLATURE POSITION
TEST PROCEDURES
NO.
NORMAL RESULTS
(1)
(a) XFEED ROLL (a) 3
(a) None
(a) None
ATT switch S54
(b) OFF
(b) RESPONSE
(b) None
(b) None
TEST MODE
switch S8
(c) RESPONSE
(c) REMOVE (c) J3-PP (+) to
(C) +6.888 to +7.112
TEST STIM
J3-AA
Vdc
switch S7
(a) TIME DELAY - (a) 1.000
(a) None
(2)
(a) None
SEC switch S9
(b) RESPONSE
(b) ON
(b) -0.01 to +0.01
(b) J3-PP (+) to
TEST MODE
J3-AA (-)
Vdc
S8
+6.888 to +7.112Vdc
APPLY
(3)
J3-PP (+) to
RESPONSE TEST
STIM switch S7
HOLD indicator comes
J3-AA (-)
on after 4 sec.
(4)
RESPONSE TEST
REMOVE
J3-PP (+) to
-0.01 to +0.01 Vdc.
STIM switch S7
J3-AA
HOLD indicator goes
out
(5)
+6.888 to +7.112Vdc
OFF
Response TEST
J3-PP (+) to
MODE switch S8
J3-AA
Response TEST
APPLY
+6.888 to +7.112Vdc
(6)
J3-PP (+) to
STIM
J3-AA
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