Marantz AV 10 Reference 15.4-Channel Home Theater Preamplifier/Processor - Manual (Page 265)

Setting the back light of the remote control unit
SETUP
Light button
You can turn off the backlight of the remote control unit.
0
Backlight is set on in the factory settings.
Disabling the backlight
1
Press and hold both SETUP and Light button until the
MAIN, Z2 and Z3 indicators on the remote are flashing
green, then release.
0
The backlight function can be turned on by performing step 1 again while the
backlight function is off.
Contents Connections Playback Settings Tips Appendix
265
Front panel Display Rear panel Remote Index