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TM 11-5820-890-30-5
17-9. OPERATIONAL CHECK. Continued
Step 2. VOLUME CONTROL CHECK. Continued
Action
e. Set CAL: FCTN GEN.
FREQ: 3 kHz (2700 to 3300 Hz)
LEVEL: 3.4 V p-p (3.2 to 3.6 V p-p).
Set FCTN: SINE.
Set CAL: OFF.
Read scope.
f. Set PTT: UUT.
g. Set PTT: OFF.
h. Push speaker VOL control in.
i. Set CAL: FCTN GEN.
FREQ: 1000 Hz (900 to 1100 Hz)
LEVEL: 4 mV p-p (3 to 5 mV p-p).
Set FCTN: SINE.
Set CAL: OFF.
Set LOAD: OFF.
Set STIMULUS: 1.
Set RESPONSE: 3.
Set RESP SEL: S2.
Read scope.
j. Set CAL: FCTN GEN.
FREQ: 400 Hz (360 to 440 Hz)
LEVEL: 4 mV p-p (3 to 5 mV p-p).
Set FCTN: SINE.
Set CAL: OFF.
Read scope.
k. Set CAL: FCTN GEN.
FREQ: 3 kHz (2700 to 3300 Hz)
LEVEL: 4 mV p-p (3 to 5 mV p-p).
Set FCTN: SINE.
Set CAL: OFF.
Read scope.
l. Operational Check is complete.
Response
e. A 3-kHz tone is heard over speaker.
If not, go to chart 7.
Scope CH1 displays a 3-kHz sine wave
at same amplitude as in step c.
If not, the rear cover assembly is bad.
f. A 3-kHz tone is NOT heard over
speaker. If it is, go to chart 8.
g. No response.
h. A 3-kHz tone is NOT heard over
speaker. If it is, go to chart 9.
i. Scope CH1 displays a 200 to
800 mV p-p, 1-kHz sine wave.
If not, go to chart 10.
j. Scope CH1 displays a 200 to
800 mV p-p, 400-Hz sine wave.
If not, the rear cover assembly is bad.
k. Scope CH1 displays a 200 to
800 mV p-p, 3-kHz sine wave.
If not, the rear cover assembly is bad.
17-6
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