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TROUBLESHOOTING FLOWCHARTS. Continued - TM-11-5820-890-20-2_105
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TROUBLESHOOTING FLOWCHARTS. Continued - TM-11-5820-890-20-2_107


TM  11-5820-890-20-2 2-39 2.2. TROUBLESHOOTING FLOWCHARTS. Continued CHART 8 AM 1780 RELAYS CLICK AND NO SIDETONE HEARD AT A PARTICULAR POSITION OF MONITOR SWITCH. (Sheet 1 of 4) POSITION PIN ALL A INT C L M E B B A G J GND A N NOTE: Circuit disturbing is used to induce noise into the system. To circuit disturb, set up the multimeter as an ohmmeter. Use the digital multimeter in the 200 range. Connect the ground probe to the indicated pin. Then, quickly lift the probe. Repeat as needed and listen for the clicking sound in the handset. Only the 200 scale has an adequate voltage to cause the clicking sound. This chart checks for opens on the listen lines. CX 4723/7060 V U T S R P N M L K J H F E D C B A 1.   SET FAULTY C 2297/C 2298 MONITOR SWITCH TO POSITION THAT FAILED. 2.   REMOVE THE CX 4723/7060 FROM AM 1780 J504, J505, J506, OR J507. 3.   DETERMINE APPROPRIATE PIN FROM CHART FOR CIRCUIT DISTURBING. 4.   CIRCUIT DISTURB PIN AT CX 7060 CONNECTOR. NO YES CLICKING SOUND HEARD IN HS ? 1 SH 2 REPLACE AM 1780. NO YES C 2297 FAILED ? 2 SH 3 START CX 4723/7060


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