Adjust Brightness / Contrast
Disconnect the device from the power supply.
Press the F1 key and re-establish the power supply.
Open the device
Keep the F1 key pressed anpush the reset-push button (see chapter 8 = Assembly diagram).
The following resolution pattern appears:
The softkey Contr./BL can e used to select between contrast
(= intensity of the background illumination.
The softkeys + and - can be used to increase/decrease the brightness / contrast. Accordingly, the value
displayed in the box to the right changes. The modification of the brightness/contrast proceeds in very
small steps, so the + or - keys must be pressed correspondingly long to cause a visible modification.
Enter the softkey Save to store the entered values. The display returns to the initial image.
The display remains permanent active while being in modification mode for contrast / brightness, which
means that the defined timeout (the display will be turned dark after expiration of that time) will be
Background illumination = 255
Contrast = 238
Installation and Operating Instructions TRS 33xx