Service manual

STP 11-25R13-SM-TG
3 - 76
Subject Area 6: ADVANCED REPAIR
REPAIR AN AUDIO AUTOMATION SYSTEM
113-575-0053
Conditions: In a tactical or garrison environment, given an inoperable or malfunctioning audio
automation system (such as AudioVAULT or CORE 2000) with an accompanying DA Form 2407,
program software (such as boot diskettes), dual-trace oscilloscope with 10X test probes, multimeter with
test leads, ATSG, audio amplifier connected to speakers, electronic equipment tool kit, soldering tool kit
(light to medium duty), bench stock, system block diagrams, manufacturers' manuals, and DA Pam 738-
750.
Standards: The standards are met when the malfunctions are corrected to restore the audio automation
system to normal operation.
Performance Measures Results
1. Review DA Form 2407. P F
2. Sectionalize the trouble to a defective stage. P F
a. Visually inspect for physical damage, missing knobs, broken controls, burned out
lamps, cracked components, loose connectors, and other discrepancies.
P F
b. Operations check the automation system to verify that the deficiency or symptom
exists and to what extent.
P F
(1) Check which component is on the air, if any. P F
(2) Check the power system indicator light. P F
(3) Select CUE on the monitor switch on the control unit. P F
(4) Set tape at the CUE tone and observe the VU meter. P F
(5) Adjust the PLAYBACK knob to 0 dBm on the meter. P F
(6) Check the control unit for proper function. P F
( a) Select LINE on the monitor switch. P F
( b) Select CUE on the monitor switch. P F
( c) Select NETWORK on the monitor switch. P F
(7) Check the MONO pushbutton. P F
(8) Push the keyboard switch to place the memory unit in manual. P F
(9) Set time. P F
( a) Move the blinking cursor to the first digit of the hours. P F
( b) Set the keyboard and program in time and function. P F
( c) Push the ENTER key twice. P F
( d) Push the OTHER key when you are finished. P F
3. Localize the trouble to a specific circuit by analyzing overall block diagrams and by
performing functional tests on suspected circuits.
P F
4. Isolate the fault to a component. P F
a. Perform resistance and continuity tests with a multimeter. P F
b. Perform power distribution voltage tests. P F
5. Replace, repair, or adjust faulty component. P F
6. Operations check by performing performance measure 2b steps; readjust or align as
necessary.
P F
7. Complete DA Form 2407 (Blocks 27, 28, and 36). P F
8. Turn DA Form 2407 into the supervisor to inspect work. P F