TM 9-4940-568-345-135HAZARDOUS VOLTAGETouching un-insulated high voltage parts inside the control and power output boxes canresult in severe personal injury or death. Measurements and adjustments must be donewith care to avoid touching high voltage parts.For your protection, stand on a dry wooden platform or rubber insulating mat, make sureyour clothing and shoes are dry, remove jewelry and use tools with insulated handles.(3)Measure voltage across lead pairs P2-P3, P3-P4, and P4-P2. Voltage should be at least 150 VAC for 50Hz sets and at least 180 VAC for 60 Hz sets, and should be approximately the same for each set of leads.If the voltages are low or uneven, check all the leads and connections between the voltage regulator andthe PMG and repair as necessary before disassembling the PMG. Note the connections at the auxiliaryterminal board in the power output box.(4)Stop the set and measure electrical resistance across lead pairs P2-P3, P3-P4, and P4-P2 with aWheatstone bridge or digital ohmmeter. Each winding should have a resistance of approximately 4.4ohms.END OF TASK
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