Troubleshooting Procedures - Continued - TM-5-6350-264-14P-10

Troubleshooting Procedures - Continued - TM-5-6350-264-14P-10_121

TM-5-6350-264-14P-10 Alarm Set Control Manual
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TM 5-6350-264-14&P-10 NAVELEX EE 181-AA-OMI-110/E121 C-9412 T.O. 31S9-2FSS9-1-10 Table 5-2. Troubleshooting Procedures - Continued Trouble Probable cause Corrective action 8. (Cont) Bad alarm should indicate 28 ±2 vdc. Turn identification mode switch to TEST/RESET circuitry. and then to SECURE. (Cont) g. Connect negative meter lead to chassis and positive meter lead to TP1 on each PC board, Al through A6. If voltage at TP1 on any PC board is 18.5 to 21 vdc, then the same vol- tage should be present on associated A12 pin. Terminals on J11 are associated with PC boards as follows: J11 A12 CARD NO. PIN NO. PIN NO. A1-TP1 to J1-6 to J11-16 to A12-F A2-TP1 to J2-6 to J11-18 to A12-A A3-TP1 to J3-6 to J11-14 to A12-B A4-TP1 to J4-6 to J11-12 to A12-C A5-TP1 to J5-6 to J11-4 to A12-D A6-TP1 to J6-6 to J11-2 to A12-E If voltage is not present on A12, turn off switch S1 on power supply. Re- move PC board A11. (1) To remove PC board A11, turn off switch S1 on top of power sup- ply. Place thumb or finger un- der board ejector on A11 and lift up until board pops out of receptacle at back of status pro- cessor. Then grasp PC board and pull straight out. (2) Turn on switch S1 on power sup- ply. Depress TRANSMITTER RESYNC switch S2. Wait about 5 minutes for system to stabilize. Turn mode switch to TEST/RESET and then to SECURE. 5-104

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