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Installation. - TM-5-6675-250-340138
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TM-5-6675-250-34 Survey Instrument Azimuth Gyro Lightweight( Leaser Siegler Inc. Models AG-8 and AG-8A) Manual
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Figure 5-1. AC-DC Converter - Component Removal and Installation
TM 5-6675-250-34
REPAIR OF AC-DC CONVERTER
r e p l a c i n g  defective  components.
5-1. General
P e r f o r m resistance checks specified in table 5-1 to
Repair of the ac-dc converter at the direct and
isolate
defective
components.
general  support  maintenance  levels  consists  of
Table 5-1. AC-DC Converter Resistance Check
Points of Measurement
Required Indication
Component
NOTE
Perform resistance checks with an ohmmeter and with power removed from the converter.
Less than 1 ohm
T1-1 to T1-2
Less than 1 ohm
T1-3 to T1-4
Less than 1 ohm
T1-5 to T1-4
10K ohms 10%
E3 to E4
Resistor R1
Approximately 50 ohms with meter
Meter pos lead to diode pos term;
Diode CR1 and CR2
on Xl scale.
meter neg lead to bus bar.
Capacitor C1
(C1 checked in ripple voltage test,
Less than 1 ohm
Filter FL1
T1-1 to T1-3
Less than 1 ohm
T1-2 to T1-5
5-2. Disassembly (fig. 5-1)
a. Removal.
(1) Remove six screws and lift the cover from
the case.
5-1

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