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Professional 909X User Manual
3. Components and Controls
3.1 Controls
 
NO. Name Descriptions
1
DB-15 Diagnostic 
Connector
Connect to vehicle's DLC (Data Link Connector) 
via diagnostic cable.
2 Power
•  In Off mode, press   button for about 5 
seconds to turn on.
•  In On mode: 
•  Press   button to activate the LCD if the 
LCD is off. 
•  Press   button to turn off the LCD if the 
LCD lights up.
•  Press   button for 3 seconds to turn off.