Re: FW: hilltopper 20
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You can have William check the schematic and locate the pin on U5 (controller IC) where the Function switch connects. With a multimeter set to DC volts and touch that IC pin, the reading should be 5V and will drop to 0V when pressing the switch.
If the IC itself is bad, I can send him a replacement once we know more. The normally-closed switch that Jim mentioned (thanks, Jim!) may be the most likely source of trouble.
73- Dave, K1SWL
On Sun, Feb 2, 2020 at 10:43 PM AG1P Ron <ag1p@...> wrote: