SYSOLUTION S40 Instructions Manual page 27

Test mode
Default "off" state, switch to "white, red, green, blue, black" and other test screens in turn.
Volume
Set the numerical value of the output audio volume, the default is 40, and it can be set to
0-100.
Freeze
The default "off" state, through the knob operation, when turned to "on", the output
screen is frozen uncontrolled, and then turned to "off", the output screen continues to display.
Black Screen
Default "off" state, switch to "on" black screen state.
U Drive Disk
To use the U disk playback function, first insert the U disk into the USB port of the video
processor, and then press the "USB" signal switch button on the front panel to enter the U disk
signal state. At this time, we enter the "U disk playback" from the main menu.
If a U disk is inserted into the processor without pressing the "USB" signal switch button
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