The 3800MK2 uses an upward and downward vision camera system for aligning devices.
If you find that you have no downward camera Image then check the following points.
Do you have Power and Activity LEDs on the downward camera?
If Yes then we know there is power and communications at the camera.
If No, investigate why these are not present, try restarting the whole system.
Make sure someone didn't put the cap back on the lens.
Go to Autohandler > Pick-and-Place > Diagnostics > View Upward Vision Image/View Downward Vision Image. The light ring should automatically turn on and you should see the camera image. The downward camera gets power from the light ring, so if the light ring doesn't come on the camera won't either.
Leave the diagnostic open and shake the purple cable going into the downward camera. See if the image starts to flicker.
Check the F stop setting on the camera. It should be between 8 and 16. If this is way off then there could be no light coming into the camera. Check that the F stop locking ring is secure. Take something like a part and put it right in front of the camera lens to see if the image changes.
If you still have issues, then collect the usual screen shots and BlackBox files and submit a support ticket for further help.
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