T M  1 1 - 5 8 2 0 - 8 9 0 - 2 0 - 1 STEPS TO PERFORM CHECKS TO MAKE ACTIONS TO TAKE 7.8   Set   RCU: FCTN  to  REM N/A N/A COMSEC  to  PT N/A N/A 7.9  RCU:  Press  BATT/CALL RCU display reads CALL? YES: Go to Step 7.10 and PTT, and release NO: Go to TS Chart 7 7.10 RCU: Press PTT and count Voice heard at RT? YES: Go  to  Step  7.11 into HS NO: Go to TS Chart 8 7.11 RT Press BATT/CALL RT display reads CALL? YES: Go to Step 7.12 and PTT, and release NO: Go to TS Chart 9 7.12 RT: Press PTT and count Voice heard at RCU? YES: End  of  RCU  Check. into HS NO: Go to TS Chart 10 l RT-1523E will retain settings that were changed at the RCU when taken out of REM to LD. There is no need to change to SC mode. Step 8. HRCRD  CHECK: 8.1 Connect  HRCRD  to  RT N/A N/A AUD/DATA and Battery Box connector.* 8.2 Press light button on HRCRD HRCRD display lights? YES:  Continue   NO: Replace  Battery  Box HRCRD display now lights? YES:   Continue   1 NO: Replace  HRCRD HRCRD display now lights? YES:   Continue   1 NO: Replace  Battery 8.3  Test  all  HRCRD  features. All features work. YES: End  of  HRCRD  Check. NO: Note  discrepancies  and  continue  to use until Transmit/ Receive features is inoper- atable. * Only   Battery   Box   CY-8523C   may   be   with   HRCRD.   Refer   to   TM   11-5820-890-10-8  for   features  and  use. RT-1523E   connection   to   HRCRD   is   to   AUD/DATA   and   AUX. 2  -  7