TM 5-6350-264-14&P-10NAVELEX EE 181-AA-OMI-110/E121 C-9412T.O. 31S9-2FSS9-1-10Table 5-2. Troubleshooting Procedures - ContinuedTroubleProbable causeCorrective action2. (Cont)b. (Cont)b.Set multimeter to ohms and connectone lead to power supply TB2-4. Con-nect other lead to each of the followingpoints:TB8-F-2 and TB$-F-6TB9-A-2 and TB9-A-6TB10-B-2 and TB10-B-6TB11C-2 and TB11-C-6TB12-D-2 and TB12-D-6TB13-E-2 and TB13-E-6TB7-S-4 and 9Power supply TB4-2Meter should indicate 0 ohms for eachcheck.c.If meter does not indicate 0 ohms for anycheck, repair or replace bad wire.c. Changes in a.a.Turn on switch S1 on top of power sup-power supply , ply. Set multimeter to dc volts and con-output volt-nect positive meter lead to PC boardage.A10, TP1 (brown), and negative lead tochassis (ground). Turn mode switch toSECURE and ensure that no alarms areactivated. Meter should indicate 18.5to 21 vdc.b.If meter indicates less than 1 vdc, turnmode switch to ACCESS. Connect posi-tive meter lead to power supply TB2-3.Meter should indicate 20 1 vdc. Con-nect meter lead to TB2-5. Meter shouldindicate 5 0.25 vdc. Connect meterlead to TB2-2. Meter should indicate28 2 vdc.c.If any of these indications are not cor-rect, turn off switch S1 on power sup-ply. Check wiring for loose connections,broken wires, or frayed insulation. Repairor replace any bad wiring.5-38
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