I have bought one of
it actually has minute black clip locks.disassembling it manually will dame or may be break that clip locks.its not easy to remove this locks without proper tools.the screws are simple to remove but locks are bit delicate .
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did you tried this for adjusting the shap viewing
Brightness Adjustment Wheel
The Ranger's image is shown on a Liquid Crystal Display (LCD). Manual adjustment of the LCD brightness is operated with the adjustment wheel.
Power Supply
The Ranger can operate on external power sources such as a vehicle's or stationary power grid (the device is equipped with a special output for that) or independently on AA batteries/accumulators.check out and reply.keep updated.
Yukon yd-100 lens removal for camera fitting seems like thred is broken
When you say lens, did you unscrew the eye piece or the actual lense? because the eyepiece is meant to fit your adaptor for 35mm cameras etc. but the actual front lense should be tightly sealed and thread locked to make your glass (scope) waterproof to some extent and to protect the alignment of the other lenses within your scope. If it is possible your local camera shop may have the ability to re-align and seal your scope, but if not do you have a warranty? and if not even that, if i were you i would align and accraglass your piece back together, it's a last ditch solution that should last for years.
20017B
need proper collamating by a repairer
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