TM 9-6115-730-24
0041
DISASSEMBLY - Continued
NOTE
VOLTAGE and FREQUENCY adjust potentiometers should be tested prior to removal.
16. Remove knob (Figure 1, Sheet 4, Item 71) using Allen wrench to unscrew setscrew, nut (Figure 1, Sheet 4,
Item 72), VOLTAGE adjust potentiometer (Figure 1, Sheet 4, Item 73), and seal (Figure 1, Sheet 4, Item 74).
Repeat for FREQUENCY adjust potentiometer (Figure 1, Sheet 4, Item 75).
17. Remove nut (Figure 1, Sheet 4, Item 76), washer (Figure 1, Sheet 4, Item 77), anti-rotation washer (Figure 1,
Sheet 4, Item 78), switch guard (Figure 1, Sheet 4, Item 79), BATTLE SHORT switch (Figure 1, Sheet 4, Item
80), and seal (Figure 1, Sheet 4, Item 81).
18. Remove screw (Figure 1, Sheet 4, Item 82), knob (Figure 1, Sheet 4, Item 83), four screws (Figure 1, Sheet 4,
Item 84), ENGINE CONTROL switch (Figure 1, Sheet 4, Item 85), and seal (Figure 1, Sheet 4, Item 86).
19. Remove nut (Figure 1, Sheet 4, Item 87), washer (Figure 1, Sheet 4, Item 88), four screws (Figure 1, Sheet 4,
Item 89), AC CIRCUIT INTERRUPTER switch (Figure 1, Sheet 4, Item 90), and seal washer (Figure 1, Sheet
4, Item 91).
20. Remove lens (Figure 1, Sheet 4, Item 92), nut (Figure 1, Sheet 4, Item 93), seal (Figure 1, Sheet 4, Item 94),
two block contacts (Figure 1, Sheet 4, Item 95) and (Figure 1, Sheet 4, Item 96), and PUSH TO STOP
EMERGENCY STOP switch (Figure 1, Sheet 4, Item 97).
21. If necessary, remove label (Figure 1, Sheet 4, Item 98).
END OF TASK
TESTING
VOLTAGE Adjust Potentiometer Test
1. Disconnect wires from terminals 7 and 45 of DVR A3.
2. Set multimeter to measure 10,000 ohms and connect multimeter leads to wires removed from terminals 7 and
45 of DVR A3.
3. Rotate potentiometer shaft counterclockwise as far as it will go.
4. Slowly and smoothly rotate VOLTAGE adjust potentiometer shaft clockwise as far as it will go while observing
multimeter.
5. Multimeter indication shall increase at an even rate from 0 - 10,000 ohms. Maximum resistance may vary +
or 1000 ohms.
6. If multimeter indication changes erratically or is not at maximum ohms when rotation is complete, the
potentiometer is defective and must be replaced.
7. If there is no continuity at any position of potentiometer, troubleshoot wiring between potentiometer and DVR
A3 or replace potentiometer.
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