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Main PCB Board
Auto Limit Function:
The Mirage 2.0 dental chair PCB can perform an auto limit function. To perform this procedure slide
“S6” to the “ON” position by sliding it down.
Verify there are no obstructions around the dental chair. This includes the delivery unit arms and
operatory light.
Press and hold “S2” (Back UP) button. When this button is initially pressed the board will tone.
Keep this button held in for 5 seconds. When you hear the second beep the chair will begin to move
in its own. You may release the button when the chair begins to move.
The chair will go through two complete cycles of movement. The first cycle is the maximum travel
of the chair. The second cycle will deduct about 10% of the first measured movement from cycle 1.
Once this procedure is complete the chair will sit in an exit position with the base down and the
backrest up. The board will continue to beep when this procedure is complete. Slide “S6” to the off
position.
During this process if the chair short travels, this indicates that there is a problem reading the
resistance of the potentiometers to the main PCB. Or the safety plate is being engaged. You will
need to check the potentiometer set screws for the backrest and seat base and try the process
again. You can disconnect the safety plate from the main PCB board during this process and re
connect when complete if necessary.
S6
