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 action4. (Cont)d. (Cont)out of receptacle at back of statusprocessor. Then grasp PC boardand pull straight out.(2) To install new PC board A8, turn boardso plastic ejector is toward top.Align board with guides at top andbottom of status processor. Slideboard straight in until it contactsreceptacle at back of processor.Then press firmly on board until itseats completely in receptacle.(3) Turn on switch S1 on power supply.Depress TRANSMITTER RESYNCswitch S2. Wait about 5 minutesfor system to stabilize. Turn modeswitch to TEST/RESET and thento SECURE.e. Bad instan-a.Turn mode switch S3 to SECURE and en-taneous alarmsure that no alarms are activated. Setcircuitry ormultimeter to ohms and connect leadsbad modeto TB6, terminals S1-I and S1-IR.switch.Meter should indicate less than 2,000ohms.b.Disconnect and then reconnect wire onTB8-F-1. Meter should indicate morethan 100,000 ohms and then return toless than 2,000 ohms 10 ±2 secondsafter wire is reconnected.c.If meter does not indicate more than100,000 ohms with wire disconnectedfrom TB8-F-1, replace PC board A9.(1) To remove PC board A9, turn offswitch S1 on top of power supply.Place thumb or finger under boardejector and lift up until board popsout of receptacle at back of statusprocessor. Then grasp PC boardand pull straight out.(2) To install new PC board A9, turn boardso plastic ejector is toward top.5-66
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