TM 11-5820-890-30-412-23. OPERATIONAL CHECK. ContinuedStep 3. ICM TEST. ContinuedActionb. Set REF RT:FCTN: REM.c. Connect W8 cable from test adapter REFAUDIO connector to REF RT AUD/FILLconnector.d. While holding test adapter:PTT: REFpress and hold REF RT: BAIT/CALL key.(Release when response occurs.)e. Set RCU:SPKR:Set test adapter:RESPONSE: 2RESP SEL: S2.While holding test adapter:PIT: REFpress and hold REF RT: BATT/CALL key.(Release when response occurs.)f. Set test adapter:RESPONSE: 3RESP SEL: S1PIT: UUT.Press RCU: BATT/CALL key.Responseb. RCU display reads:If not, go to chart 12. Handset is silent(disregard occasional beeps). If not, goto chart 13.c. No response.d. Undistorted two-tone alarm tone is heardin handset. If not, go to chart 14. RCUdisplay reads:If not, the control module (19A2) is bad.e. Two-tone alarm tone is heard in handset.If not, go to chart 15.f. Two-tone alarm tone is heard in handset.If not, go to chart 16. RCU displayreads:If not, the control module (19A2) is bad.12-30
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