TM 9-4120-404-14
3-37. LOGIC BOX ASSEMBLY (LGC). - Continued
b. Test. - Continued
d. For the next 2 seconds:
LED 6 shall continue to be off.
LED 7 shall illuminate. End of routine.
10. Place S1 in the "ON" position for 2 seconds, and then place S1 in the "OFF" position. LED 7 shall turn off
for 10 seconds and then illuminate.
11. Place S1 in the "ON" position. LED 7 shall turn off and in 10 seconds LED 3 shall illuminate.
12. Place S1 in the "OFF" position and reset mode switch, S7. Then turn mode switch back to "V" position. In
2 seconds LED 7 illuminates.
13. Place S1 in the "ON" position, and in 2 seconds place S4, S5, and S6 in the "ON" position. LED 7 shall turn
off and in 10 seconds LED 3 shall illuminate. S4, S5, and S6 have no effect.
14. Place all fault switches in the "OFF" position. Reset, by turning mode switch, S7, to "OFF/RESET", and
then back to "V". Simultaneously place S4, S5, and S6 in the "ON" position, LED's 4, 5, and 6 illuminate.
In 1 second place S 1 in the "ON" position, LED's 4, 5, and 6 turn off. After 10 seconds LED 3 illuminates.
15. Reset, by turning mode switch, S7, to "OFF/RESET" position; however, do not place fault switches in "OFF"
position. Turn mode switch back to "V" position. No LED's are illuminated, but in 10 seconds LED 3 shall
illuminate.
(c) Cool Mode Test.
1. Place all fault switches in the "OFF" position. Reset, by turning mode switch, S7, to "OFF/RESET" position,
and then to "C" position. Rotate R6 to coldest position. After a 2-second delay, LED's 2 and 7 shall
illuminate.
2. Rotate R6 to the warmest position. LED 2 shall turn off and LED 7 shall remain illuminated.
3. Rotate R6 slowly toward cold without causing LED 7 to turn off. Squeeze thermistor, RT1, between fingers
for 10 seconds. LED 7 shall turn off. After 2 seconds LED's 2 and 7 shall illuminate.
4. Rotate R6 to coldest position. Place S4 in the "ON" position. The following routine shall occur:
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