Nikon E200

To clean and troubleshoot:

  • make sure lamp housing is all the way in

  • make sure swing-out condenser is all the way in or out.

  • check underside of ocular head for fingerprints

  • pointer goes under the viewfield ring

See manual here: http://www.micropticsl.com/wp-content/uploads/2013/09/nikon_e200_manual.pdf