Service manual
STP 11-25R13-SM-TG
3 - 49
REPAIR A DIGITAL AUDIO TAPE (DAT) RECORDER/REPRODUCER
113-575-0059
Conditions: In a tactical or garrison environment, given an inoperable or malfunctioning DAT machine
with an accompanying DA Form 2407, dual-trace oscilloscope with 10X test probes, multimeter with test
leads, ATSG, electronic equipment tool kit, soldering tool kit (light to medium duty), bench stock, DA Pam
738-750, and manufacturers' manuals.
Standards: The standards are met when the repaired DAT machine can accurately store and reproduce
audio.
Performance Measures Results
1. Review the DA Form 2407. P F
2. Sectionalize the trouble to a defective stage. P F
a. Visually inspect for physical damage, missing controls, broken switches, and other
discrepancies.
P F
b. Turn ON and operations check the DAT machine to verify that the deficiency or
symptom exists and to what extent.
P F
(1) Check all front panel controls, lights, and indicators. P F
(2) Observe tape tension. 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. Conduct 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
a. Perform tape-to-head alignment if the deck plays tapes it records, but does not
reliably play tapes recorded on other decks.
P F
b. Adjust the posts that guide the tape correctly past the rotating heads. P F
6. Operations check the DAT machine following performance measure step 2b; readjust
or align as necessary.
P F
7. Complete DA Form 2407 (Blocks 27, 28, and 36), using the appropriate codes listed in
DA Pam 738-750.
P F
8. Turn the DA Form 2407 into the supervisor to inspect work. P F
Evaluation Guidance: Score the soldier a GO if all steps are passed (P). Score the soldier a NO-GO if
any step is failed (F). If the soldier fails any step, show what was done wrong and how to do it correctly.
Have the soldier practice until he can correctly perform the task.
References
Required Related
DA Pam 738-750 TB 385-4
Mfg Manuals