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Alternative access to screen calibration:
- Access is achieved by simultaneously pressing the needle position buttons < > and switching the machine on.
- Select the cross symbols on the touchscreen for calibration.
Recalibrate touch screeen:
Access is achieved by simultaneously pressing the needle position buttons < > and at the same time switching the machine on.
• Brightness is adjusted by turning the stitch length knob.
• Touch the cross symbols on the touch-screen for calibration.
It sounds like you may have two problems - one is easy, but without the other, its hard !!! If the touchscreen isn't working, it may simply be mis-calibrated and cant be accessed. To recalibrate the touchscreen from scratch, switch the machine on whilst, at the same time, pressing both of the two needle position buttons - the calibration screen should then come up and you should touch the screen where the dots are shown to recalibrate it. If, pressing the dots does not do anything, the probability is that your touch overlay or main control board is faulty, in which case you will need to take it to your Bernina agent. If you manage to re-calibrate the touchscreen OK, switch the machine off and back on again and if the display is still very grey but readable, you can adjust the contrast of the display by pressing the button with an arrow facing right, inside a box - this will take you to the user adjustment menu. Touch the display button that has a symbol with three vertical bars of different shades of grey and this will take you to a display that allows the brightness and contrast to be adjusted - touch the up or down buttons to get the best display contrast and once this is done, you should be all working again. Good Luck
For a 640: Make sure the machine is off then Press the reverse button and the needle up/down button at the same time and keep pressing while turning on the machine until the service screen come up. Select the "i" icon and then the icon that has a picture with the clock and a question mark. That will show you the hours and stitch count used. To exit the service program just turn off the machine.
For a 640: Make sure the machine is off then Press the reverse button and the needle up/down button at the same time and keep pressing while turning on the machine until the service screen come up. Select the "i" icon and then the icon that has a picture with the clock and a question mark. That will show you the hours and stitch count used. To exit the service program just turn off the machine.
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