SoundMax SM-CMMD7001 - Manual (Page 17)

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MODE button on the RC or MOD button on the panel can switch all modes of the main unit, but the external
monitor is showing DVD/USB/SD mode only.
D-Dual on: When D-Dual is on, all buttons are working regularly except VOL+/- buttons on the RC or VOL
regulator on the panel for the external monitor and MUTE (MUTE/SEL), MODE (MOD) buttons. Pressing MUTE
button on the RC or MUTE/SEL button on the panel can control external monitor (cannot control the main
unit), pressing MODE button on the RC or MOD button on the panel can change DVD/USB/SD mode for
external monitor, the main unit will keep in current mode.
Dual in DVD/USB/SD mode
C-Dual on: When C-Dual is on, all buttons are working regularly, except MUTE (MUTE/SEL), MODE (MOD) and
VOL buttons (VOL regulator). Pressing MUTE or VOL+/- buttons on the RC (or pressing MUTE/SEL button and
rotating VOL regulator on the panel) can control the main unit (cannot control external monitor). Pressing
MODE button on the RC or MOD button on the panel can switch all mode of the main unit, but the external
monitor is only DVD/USB/SD mode.
D-Dual on: When D-Dual is on, all buttons are working regularly except VOL+/- buttons on the RC or VOL
regulator on the panel for the external monitor, and MUTE (MUTE/SEL), MODE (MOD) buttons. Pressing MUTE
button on the RC or MUTE/SEL button on the panel can control external monitor (cannot control the main
unit), when pressing MODE button on the RC or MOD button on the panel, the main unit and external monitor
is showing DVD/USB/SD mode only.