Marantz Stereo 70S 2.1-Channel Network A/V Receiver - Manual (Page 113)

Remote lock function
When connecting an IR receiver, enable the Remote lock function. When
the function is enabled, you can not perform operations with the remote
control unit.
By default, this function is disabled.
X
INPUT selector knob
Disabling the sensor function of the
remote control unit
1
When this unit is turned on, press and hold X on the
main unit until “SPECIAL MODE” appears on the
display.
2
Turn the INPUT selector knob to select “4P/R LOCK”,
then press X .
3
Turn the INPUT selector knob to select “RC LOCK ON”,
then press X to confirm the setting.
The infrared light receiving function is disabled.
Contents Connections Playback Settings Tips Appendix
113
Front panel Display Rear panel Remote Index