TM 11-6625-444-14-1
Section Il. TOOLS, TEST EQUIPMENT AND TROUBLESHOOTING
equipment required for maintenance of the
voltmeter. No special tools are required.
This section contains a listing (table 6-7) of test
task. Since a number of subassemblies are in-
6-6. Troubleshooting Instructions
volved, the first step in troubleshooting after
a. The troubleshooting information contained
visual inspection is to isolate the trouble to a
i n this section includes both step-by-step
particular section. Once this is accomplished,
procedures and fault logic diagrams to assist in
each subassembly in that particular section can
rapdily locating a defective assembly and com-
then be tested to reveal the exact source of
ponent parts.
trouble.
b. Troubleshooting starts by first performing a
NOTE
thorough visual inspection for improperly seated
Install each assembly referenced during
plug-in assemblies, l o o s e or broken wires,
troubleshooting on the extender card
physically damaged parts, and other obvious
provided with the voltmeter to facilitate
problems. Next, the performance characteristics
access to test points.
should be checked in accordance with paragraph
b. Power Supply. Correct operation of the
power supply section (A 1 ) is verified by making
from these tests can then be used to help in
the voltage checks in table 6-8. All circuitry for
locating the exact source of trouble.
this section is contained on the power supply
assembly the location of which is shown in figure
major sections: power supply; analog; digital;
shown in figure 6-2. Component parts are shown
and ratio. Each section, except for the power
in figure 6-9.
supply, consists of a number of subassemblies
which together perform a separate but distinct
