From the SC35/37 manual:
No other references to Firmware updating in the manual for the AVR.
Quote:
Software update
The Home Media Gallery software can be updated over
the Internet.
1 Set the remote control operation selector switch to
SOURCE.
2 Press HMG to select Home Media Gallery as the
input function.
3 Select ‘Setup’ then press ENTER.
4 Select ‘Firmware Update’ then press ENTER.
5 Use / to select ‘Yes’ then press ENTER.
Updating % and the elapsed time are displayed.
If No new firmware has been found is displayed, there
is no need to update the software.
Information on software updates may be posted on the
Pioneer website.
http://www.pioneerelectronics.com
Software update
The Home Media Gallery software can be updated over
the Internet.
1 Set the remote control operation selector switch to
SOURCE.
2 Press HMG to select Home Media Gallery as the
input function.
3 Select ‘Setup’ then press ENTER.
4 Select ‘Firmware Update’ then press ENTER.
5 Use / to select ‘Yes’ then press ENTER.
Updating % and the elapsed time are displayed.
If No new firmware has been found is displayed, there
is no need to update the software.
Information on software updates may be posted on the
Pioneer website.
http://www.pioneerelectronics.com
No other references to Firmware updating in the manual for the AVR.















sq via cable/fios/whatever can (and does) vary widely from channel to channel and show to show