Jim said:
I hope this will be an easy one. I have a Bearcat scanner 210xl. Under normal
light I can't read the display, but when I turn out the lights I can watch it
scan. Any ideas what to check?
Thanks, Jim
The 210XL has a LCD display. These symptoms are typical of a transmissive LCD,
that is, one that has a backlight that illuminates the display from behind. The
backlight is probably defective, or the LCD display itself is bad. One other
possibility is that the LCD backplane drive voltage (usually a low frequency
square waveform) is low or has stopped.
Unless you're adept at figuring out a circuit without benefit of schematic, any
of these problems will require service manual/schematic and ability to
troubleshoot the circuit. Test equipment such as a scope is invaluable here,
but you might get by with a DVM if you know what you're looking for and where to
find it.
--
Dave M
MasonDG44 at comcast dot net (Just substitute the appropriate characters in the
address)
Some days you're the dog, some days the hydrant.