Troubleshooting Procedures

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 1. (Cont) a. (Cont) If an intrusion alarm is indicated on PC board A2, TP1, for example, connect jumper to terminal numbers 1 and 2 on TB9-A. With jumper installed, meter should indicate less than 0.5 vdc. With jumper removed, meter should indicate 18.5 to 21 vdc. If these voltages are cor- rect, there is a genuine alarm condition. d. If voltage indications at TP1 and TP2 are correct, troubleshoot interconnect- ing wiring and associated sensor per steps in TM5-6350-264-14/1, System Manual. e. If voltage indications at TP1 and TP2 are not correct, replace faulty PC board in status processor. (1) To remove PC boards A1 through A6, turn off switch S1 on top of power supply. Place thumb or fin- ger under board ejector and lift up until board pops out of receptacle at back of status processor. Then grasp PC board and pull straight out. NOTE PC boards Al through A6 are identical and may be in- stalled in any slot, 1 through 6. (2) To install new PC boards Al through A6, turn PC board so that plastic board ejector is toward top. Align board with guides at top and bot- tom of status processor. Slide board straight in until it contacts receptacle at back of processor. Then press firmly on board until it seats com- pletely in receptacle. Turn on switch S1 on top of power supply. Depress TRANSMITTER RESYNC switch . S2. Wait about 5 minutes for system to stabilize. During 5-minute stabili- zation period, set multimeter for dc 5-10