Along with Jenne's suggestion, I renewed the IR transmission common mode screen. The previous screen (3rd attachment) was not compact and had verious confusing features. The new screen (2nd attachment), LSC_CUST_TR_COMMON.adl, shows the signal flow in a better way. It is linked from LSC_OVERVIEW screen (1st attachment). It can eventually replace LSC_CUST_TRPD.adl file.

BTW, the signal flow was diagramed and uploaded to DCC as E1700204.