Yamaha RX-V657 Owner's Manual page 11

CONTROLS AND FUNCTIONS
K SLEEP indicator
Lights up while the sleep timer is on.
L 96/24 indicator
Lights up when a DTS 96/24 signal is input to this unit.
M LFE indicator
Lights up when the input signal contains the LFE signal.
N Input channel indicators
Indicate the channel components of the current digital
input signal.
O ZONE 2 indicator
Lights up when Zone 2 power is on.
P Radio Data System indicators
The name(s) of the Radio Data System data offered by the
currently received Radio Data System station light(s) up.
EON lights up when an Radio Data System station that
offers the EON data service is being received.
PTY HOLD lights up while searching for stations in the
PTY SEEK mode.
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