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Page Title:
Fixed-Level Analog Signal Tests (CRC) |
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 TM 55-4920-430-13
STEP
CONTROL/SWITCH
METER/lNDICATOR
NO.
NOMENCLATURE
POSITION
NORMAL RESULTS
ai.
RESPONSE TEST MODE
OFF,
-3.55 to -3.95 VDC
then
ON
aj.
SELF-TEST CIRCUIT SELECT
30-6
RESPONSE TEST STIM
APPLY,
+1.89 to +2.85 VDC
then
when HOLD light comes on
REMOVE
HOLD light goes out.
ak.
RESPONSE TEST MODE
OFF
+3.55 to +3.95 VDC
al.
ACTUATOR SIMULATION DASH
GND
SELF-TEST CIRCUIT SELECT
30-8
RESPONSE TEST MODE
ON
RESPONSE TEST TIME DELAY -- SEC
00.100
ACTUATOR SIMULATION CCDA
NORM
RESPONSE TEST STIM
APPLY,
+6.86 to+ 11.42 VDC
then
when HOLD light comes on
REMOVE
HOLD light goes out.
am.
SELF-TEST CIRCUIT SELECT
30-9
RESPONSE TEST STIM
APPLY,
-6.86 to -11.42 VDC
then
when HOLD light comes on
REMOVE
HOLD light goes out.
an.
METER
AC
RESPONSE TEST MODE
OFF
SELF-TEST CIRCUIT SELECT
40-0
5.2 to 7.2 VAC
ACTUATOR STIMULATION CCDA
GND
S/T CIRCUIT SELECT TENS
00
S/T CIRCUIT SELECT UNITS
0
NOTE
At end of self test, switches are at initial settings, except the following:
SET TO
CONTROL/S WITCH
METER
D
C
200V
METER RANGE
RESPONSE TEST
TIME DELAY-SEC
12.345
AFCS POWER
OFF
a. Adjust the digital multi meter to measure dc volts.
b. Set SERVO SIMULATION CCD switch S49 to NORM.
c. Connect the negative test lead of the multimeter to receptacle AFCSJ3, pin AA.
d. Set the ANALOG SIGNALS switches to the position listed below. For each switch setting, connect
the positive test lead of the multimeter to the receptacle and pin listed for it. At each pin, the voltage
shall be as listed for RESPONSE TEST MODE switch OFF and for MODE switch ON.
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 minus sign () before an ac voltage indicates out-of-phase,
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