Using multi-zone features, What you can do with the multi-zone function, Making a multi-zone connection – Sony STR-DA5700ES User Manual
Page 78: What you can do with the multi-zone, Function, Using multi-zone features 1:zone 2 connections

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What you can do with the
Multi-zone function
You can enjoy images and sounds from an
equipment connected to the receiver in a zone
other than the main zone. For example, you
can watch the DVD in the main zone and listen
to the CD in zone 2 or zone 3.
When using an IR repeater (not supplied), you
can operate both an equipment in the main
zone and Sony receiver in zone 2 or zone 3
from zone 2 or zone 3 using the remote
control.
Use an IR repeater when you install the
receiver in a place where signals from the
remote control cannot reach.
Making a multi-zone connection
Only signals from equipment connected to the analog input jacks are output through the ZONE 2
OUT/ZONE 3 OUT jacks. No signals are output from equipment connected to only the digital input
jacks.
1
Outputs sound from speakers in zone 2 using the SURROUND
BACK (ZONE 2) terminals of the receiver.
Using Multi-zone Features
1:Zone 2 connections
Main zone
Zone 2
TV
monitor
ZONE 2 VIDEO
OUT*
B
STR-DA5700ES
B
SURROUND BACK
(ZONE 2)
A
Multifunction remote
control
IR REMOTE IN