Marantz SR5010 - Manual (Page 230)

Setup Lock
Protect settings from inadvertent changes.
o Lock
On: Turn protection on.
Off
(Default):
Turn protection off.
0 When cancelling the setting, set “Lock” to “Off”.
NOTE
0 When “Lock” is set to “On”, no setting items are displayed except for “Setup
Lock”.
Contents Connections Playback Settings Tips Appendix
230
Front panel Display Rear panel Remote Index