I
BACK button
This returns to the previous screen.
J
System buttons
These perform playback related operations.
Tuning up / Tuning down buttons (TUNE +, –)
These select either FM broadcast or AM broadcast.  (v p. 80)
K
QUICK SELECT buttons (1 – 4)
These call up settings registered to each button, such as input source,
volume level and sound mode settings.  (v
 p. 136)
L
Remote control signal transmitter
This transmits signals from the remote control unit.  (v
 p. 8)
M
ECO Mode button
This switches to ECO Mode.  (v p. 206)
N
POWER button (X)
This turns the power on/off.  (v
 p. 64)
O
SLEEP button
This sets the sleep timer.  (v p. 134)