My K3S, s/n 10163, has been very reliable in all aspects. As to the LCD
ADJ, #2 is the value where, on my desk, the radio is slightly below eye
level. Higher values are used if the radio is at eye level or above.
As to LCD BRT, #3 affects back light brightness. Anything over #3 is
much too bright for my lighting. Internally, I would not know what to
look for or check.
I would suggest you make sure the power to the radio is withing specs
being 13.8 nominal, 11.0V min, and 15.0V max. My station the power
supply to the radio delivers 14.5 volts in receive and 14.0 at 100 watts
carrier output. If you have a known good configuration saved, it may
be a good idea to restore to that file using the K3 Utility.
73
Bob, K4TAX
On 11/29/2025 11:00 AM, [email protected] wrote:
K3S display problem...
Greetings,
I've been a K3S (s/n 10305) owner for a good while, and been VERY happy
with it.
I've finally encountered my first problem, involving the contrast of the
display.
I've reached a point where Menu items LCD ADJ is at 100, and LCD BRT is
at 2 in order to be able to show sufficient contrast to comfortably read
the display. Dialing LCD ADJ to 50 results in a pretty much blank
display, which was not the case when the rig was new. The rig NEVER gets
any direct sunlight on its face. There is some VERY subdued ambient
daylight in the shack, but nothing that should deteriorate a
light-sensitive surface.
My habit in station layout is to put the rig to my left, which still
allows readability, but if I am dead-center as I view the display,
everything is almost invisible at the 100/2 combination. Looking down
from above and from the left also gives better contrast, but something
seems to be drifting out of spec., and I'm not sure if others have also
had this problem already.
I've tried searching through my archive of the reflector, but haven't
seen any reference to this problem yet. My general habit originally with
long-term use of the rig was to keep it on continuously, until this
problem showed up. So now I power off when I'm not using the rig. I'm
hoping it's just something adjustable that has drifted, and needs a tweak.
I'm handy with a multimeter, if an expert has suggestions of things to
try checking voltage and resistance-wise.
Let the comments begin...
--
Patience please; Rome wasn't destroyed in a single day!
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