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

Troubleshooting Procedures - Continued - TM-5-6350-264-14P-10_73

Troubleshooting Procedures - Continued - TM-5-6350-264-14P-10_75

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 4. (Cont) c. Bad tamper a. Set multimeter to dc volts and connect circuitry positive meter lead to PC board A7-TP2 (telephone (red), and negative lead to chassis dialer). (ground). b. If meter indicates 18.5 to 21 vdc, ensure that there is a jumper between TB7, S-8 and S-9. Set multimeter to ohms and connect leads to TB7, S- and S-9. If meter indicates more than 0 ohms, replace jumper. c. If meter indicates 0 ohms, turn off switch S1 on power supply. Use board ejector to remove PC board A7. Connect meter leads to J7-1 and J7-7. d. If meter indicates more than 100, 000 ohms, inspect J12/P1, pins 19 and 34 for broken or loose wires. Resolder any bad connections at P1, pins 19 and 34. e. If meter indicates 0 ohms at J7-1 and J7-7, replace PC board A7. To install new PC board, turn board so plastic ejector is toward top. Align board with guides at top and bottom of status processor. Slide board straight in until it contacts re- ceptacle at back of processor. Then press firmly on board until it seats completely in receptacle. f. Turn on switch S1 on power supply. De- press TRANSMITTER RESYNC switch S2. Wait about 5 minutes for system to stabilize. During 5-minute stabilization period, check ower sup- ply. Set multimeter to dc volts and connect negative lead to chassis (ground). Connect positive lead to power supply, TB2-3. Meter should indicate 20 +1 vdc. Connect positive lead to TB2-S. Meter should indicate 5-56

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