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TROUBLESHOOTING FLOWCHARTS. Continued - TM-11-5820-890-20-2_263
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TROUBLESHOOTING FLOWCHARTS. Continued - TM-11-5820-890-20-2_265


TM  11-5820-890-20-2 4-22 4.2. TROUBLESHOOTING FLOWCHARTS. Continued B CHART 7 NO AUDIO HEARD AT HANDSET AND/OR LOUDSPEAKER WHEN RCU IS PLACED IN •SQ OFF". (Sheet 2 of 3) NO YES NOISE HEARD IN LS 685 LOUDSPEAKER ? 1.   CONNECT LS 685 LOUDSPEAKER TO RCU SPEAKER CONNECTOR. 2.   REPLACE RT. 3.   SET THE RT AS FOLLOWS: FCTN:    REM REPLACED RT IS BAD. REPLACE RCU. NO YES   AC VOLTMETER READS GREATER THAN 7 V ac ? 1.   REMOVE LS 685 LOUDSPEAKER FROM RCU SPEAKER CONNECTOR. 2.   SET THE RCU VOLUME SWITCH FULL CW. 3.   SET UP DIGITAL VOLTMETER AS AN AC VOLTMETER AT THE 20 V ac RANGE. 4.   MEASURE AC VOLTAGE AT RCU SPEAKER CONNECTOR PIN E TO PIN A. GROUND LEAD CAN BE PLACED AT EITHER PIN. REPLACE LS 685 LOUDSPEAKER. 1 SH 2 RCU SPEAKER CONNECTOR


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