Pioneer SC-LX57 (SC-75) I/O assignments

The following image shows the inputs available on the rear of the Pioneer SC-LX57:

Pioneer SC-LX57 rear panel inputs

There are eight HDMI inputs (IN1, BD, IN2, IN3, IN4, IN6, IN7 and IN8) on the back panel with an additional HDMI input on the front (IN5/MHL). There are two component inputs, two coaxial digital inputs, two optical digital inputs and a number of analog and composite video inputs. Other inputs include the adapter port for an optional bluetooth adapter, an Ethernet port and a WiFi adapter (usb) port (not shown) for network access and a USB port on the front.

The available options for input assignment to devices wasn’t totally clear from the manual. After some experimentation I now have a full table of what inputs can be used with each device, as shown in the following table:

Input assignments
INPUT
DEVICE
OPT
1
OPT
2
COAX
1
COAX
2
HDMI/
BD
HDMI/
IN1
HDMI/
IN2
HDMI/
IN3
HDMI/
IN4
HDMI
/MHL/
IN5
HDMI/
IN6
HDMI/
IN7
HDMI/
IN8
Comp-
onent

1
Comp-
onent

2
Analog
1
Fixed
Analog
Fixed
Comp-
osite
Direct
Remote
Key
TV Y Y Y Y                       Y     TV
CD Y Y Y Y                       Y     CD
BD         Y                           BD
DVD Y Y Y Y   Y Y Y Y Y Y Y Y Y Y   DVD DVD DVD
SAT/CBL Y Y Y Y   Y Y Y Y Y Y Y Y Y Y   SAT SAT SAT/CBL
BDR/DVR Y Y Y Y   Y Y Y Y Y Y Y Y Y Y   BDR BDR BDR/DVR
VIDEO Y Y Y Y   Y Y Y Y Y Y Y Y Y Y   VIDEO VIDEO  
HDMI5           Y Y Y Y Y Y Y Y           MHL
HDMI6           Y Y Y Y Y Y Y Y            
HDMI7           Y Y Y Y Y Y Y Y            
HDMI8           Y Y Y Y Y Y Y Y            

Some additional notes an the input assignments:

  • Audio assignment for the TV device is not available when HDMI ARC (‘Audio Return’) is enabled. When ARC is enabled the audio is taken from the return audio path via the HDMI OUT 1 output.
  • The Analog and Composite fixed inputs are dedicated to the specified device and not assignable.
  • All devices have IR input codes to directly select the device.
  • All devices have separate  ‘Auto’ input IR codes that as well as selecting the device will also power on the AVR if it is not already powered on and then switch to the selected input. This is very handy in that it avoids a delay that would normally be needed to wait for the AVR to power up before selecting the correct input.
  • It is not possible to select video and audio devices separately (so no way to watch the SAT/CBL device while listening to the CD device for example.)
  • When an audio only device is selected the HDMI output appears to be turned off.
  • HDMI4, HDMI6, HDMI7 and HDMI8 are connected via an internal HDMI switch. This does not effect assignment or input selection but it does effect the HD-ZONE output (If using the third HDMI output as a separate zone.) It is not possible to have more than one source from this group active at any time.
  • The inputs without a direct access key on the remote can still be selected by using the HDMI input cycle button or the next/previous device button.
  • The MHL remote button does not have any device code associated with it. It switches the remote to the Pioneer MHL control IR code set.
  • The HDMI remote button does have a device code associated with it, but it will also cycle through any HDMI input that are not skipped each time it is pressed.

In many ways this is far more complex to setup and far more restrictive than the Yamaha RXV-3800 that it replaced. All the extra inputs and the full list of IR codes made available by Pioneer though have made this far less of a problem  then it might have otherwise been.

Note that the Pioneer SC-LX57 is also known as the SC-75 in other markets. The SC-LX77 and SC-LX87 (SC-77 and SC-79 in other markets) are practically identical from the input device configuration point of view (with the addition of a PHONO and USB DAC inputs being the main differences).

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