Yamaha RX-V793 Owner's Manual page 15

Notes on connecting with an LD player equipped with an AC-3 RF output
If your LD player has AC-3 RF signal output terminal and no
digital signal output terminal for AC-3 discrete audio signals,
connect the AC-3 RF signal output terminal to this unit's
OPTICAL (or COAXIAL) digital signal input terminal by using
an RF demodulator (separate purchase).
First, connect the AC-3 RF signal output terminal of the LD
player to the AC-3 RF signal input terminal of the RF
demodulator. Next, connect the optical (or coaxial) digital
signal output terminal of the RF demodulator to the OPTICAL
(or COAXIAL) digital signal input terminal of this unit.
This connection is necessary for sending audio signals
encoded with the Dolby Digital (AC-3) from the LD player to
this unit.
It is also necessary to connect the LD player to this unit's
analog audio signal input terminals regardless of the AC-3 RF
signal connection, for playing back an LD source with the
Dolby Pro Logic Surround decoded or in normal stereo (or
monaural).
GND
75 UNBAL.
FM
ANT
MONITOR
OUT
GND
AM
ANT
PHONO
Notes
If your LD player has an OPTICAL digital output terminal
(for 2-channel audio signals), be sure not to connect it to
this unit's OPTICAL digital input terminal. If you do so,
when you play a disc encoded with the Dolby Digital (AC-3),
the Dolby Digital (AC-3) will not be decoded because the 2-
channel audio signals input to this unit's OPTICAL digital
input terminal are selected prior to the signals encoded with
the Dolby Digital (AC-3) input to this unit's COAXIAL digital
input terminal by way of an RF demodulator.
REMOTE CONTROL PCM/ DIGITAL IN
(AC – 3 DIGITAL IN)
IN OUT
OPTICAL COAXIAL
DVD/LD DVD/LD TV/DBS
ON SCREEN SELECTOR
S VIDEO VIDEO
S VIDEO SIGNAL VIDEO SIGNAL
VCR MONITOR DVD/LD TV/DBS
OUT
IN OUT
AUDIO SIGNAL
CD TAPE/MD DVD/LD TV/DBS
TAPE PB REC OUT
1 3 4
If desired, you can also connect the digital signal output
terminal (for 2-channel audio signals) of the LD player to this
unit. If you will do so, connect it to the COAXIAL digital signal
input terminal of this unit, and connect the RF demodulator to
the OPTICAL digital signal input terminal of this unit.
By this connection, if the input mode of the DVD/LD source is
in "AUTO", you can enjoy listening to sounds with the Dolby
Digital (AC-3) decoded when you play a disc encoded with the
Dolby Digital (AC-3) though signals are input to both OPTICAL
and COAXIAL digital signal input terminals of this unit
simultaneously (because signals input to the OPTICAL terminal
take priority of signals input to the COAXIAL terminal).
See page 29 for details about switching the input mode.
COAXIAL
DIGITAL OUT
COAXIAL
DIGITAL OUT
VCR
IN OUT
OPTICAL
DIGITAL OUT
VCR
IN OUT
(U.S.A. model)
If, for example, you play a CD on the LD player (which can
play a CD also), there is no input to the OPTICAL terminal,
so the signals input to the COAXIAL terminal take priority. In
this case, switch off the RF demodulator to listen to CD
sound surely. However, if your RF demodulator is the
Yamaha model APD-1, you do not have to switch it off.
When you want to play a source encoded with the Dolby
Digital (AC-3) without decoding the Dolby Digital (AC-3),
you must switch off the power to the RF demodulator.
LD player
AC-3
RF OUT
AC-3
RF IN
RF demodulator
(YAMAHA APD-1 etc.)
ANALOG
OUT
13