TM 9-4120-407-14
4-7. LOGIC BOX ASSEMBLY TESTING AND REPLACEMENT. (Cont)
(p) Place S6 in the ON position for 2 seconds then place S6 in the OFF position. The following
routine shall occur:
1 LED 1 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED 6 illuminates. LED 7 remains illuminated.
3 For the next 2 seconds: LED' 6 and 7 turn off.
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4 LED 7 illuminates for 2 seconds and then turns off for 2 seconds.
5 LED' 1 and 7 shall illuminate. End of routine.
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(q) Place S2 and S4 in the ON position making certain that S2 is turned on before S4. LED 1 turns
off and LED 7 remains illuminated. In 10 seconds, LED' 3 and 4 shall illuminate and LED 7
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remains illuminated.
(r) Reset by placing S2 and S4 in the OFF position and turning the MODE switch to OFF RESET
and back to HEAT. Place S2 and then S5 in the ON position making certain S2 is turned on
before S5. LED 1 turns off and LED 7 remains illuminated. In 10 seconds, LED' 3 and 5 shall
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illuminate and LED 7 remains illuminated.
(s) Reset by placing S2 and S5 in the OFF position and turning the MODE switch to OFF RESET
and back to HEAT. Place S2 and then S6 in the ON position immediately. LED 1 turns off
and LED 7 remains illuminated. In 10 seconds, LED' 3 and 6 shall illuminate and LED 7
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remains illuminated.
(t) Reset by placing S2 and S6 in the OFF position and turning the MODE switch to OFF RESET
and back to HEAT. Place S7 in the OFF position, then place S4, S5, and S6 in the ON
position. Next, place S1 in the ON position, followed immediately by S7. LED' 1 and 7
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shall turn off. In 10 seconds, LED 3 illuminates and LED 7 stays off. S4, S5, and S6 should
have no effect.
(u) Reset by placing switches S1 thru S7 in the OFF position and setting MODE switch to OFF
RESET and back to HEAT. Place S4, S5, and S6 in the ON position, followed by S7. The
following routine shall occur:
1 LED 1 shall turn off and LED 7 shall remain illuminated.
2 For the next 8 seconds: LED' 4, 5, and 6 shall illuminate. LED 7 remains illuminated.
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3 For the next 2 seconds: LED' 4,5,6, and 7 turn off.
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4 For the next 2 seconds: LED' 4, 5, and 6 shall continue to be off. LED 7 shall illuminate.
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5 Step 2 thru 4 shall repeat twice. Then, LED' 4, 5, and 6 illuminate and LED 7 remains
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illuminated.
(v) Reset by placing switches S1 thru S7 in the OFF position and setting MODE switch to OFF
RESET and back to HEAT. Place S4, S5, and S6 in the ON position followed immediately by
S7, then S2. LED 7 shall illuminate. If LED' 4, 5, and 6 are illuminated, they shall turn off
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and in 10 seconds, LED' 3, 4, 5, and 6 illuminate and LED 7 remains illuminated.
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(w) Reset by turning MODE switch to OFF RESET however, keep S2, S4, S5, S6 and S7 in the ON
position. Then turn MODE switch to HEAT. LED 1 shall not illuminate. LED 7 shall
illuminate. In 10 seconds, LED' 3, 4, 5, and 6 illuminate and LED 7 remains illuminated.
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