Sony HT-RT5 Operating Instructions Manual page 54

Rear
 LAN (100) port
 HDMI OUT (ARC) jack
This jack supports HDCP 2.2.
 HDMI IN 1 jacks
This jack supports HDCP 2.2.
 HDMI IN 2 jack
 HDMI IN 3 jack
54
GB
 ANALOG IN jack
 A.CAL MIC (ECM-AC3) jack
 DIGITAL IN (TV) jack
 IR BLASTER jack
 AC power cord (mains lead)