[Elecraft] K3 Lost Control of Front Panel Buttons

[Keith Onishi]

I have lost control of some particular PBs which have been used most often.
Elecraft support suggested to check SW ADC readings on pushing the particular PBs.
To check the reading, you go to CONFIG menu and select SW TEST to ON. You need to set TECH MD to ON for the test.

Please use SW TEST to test the performance of the buttons in question .
Pressing M>V with SW TEST on reads approximately 7 164 and flickering 7 165.
Pressing V>M with SW TEST on reads approximately 7 191 and flickering 7 192.  
While in SW TEST, also check the performance of all four rotating knobs which contain push buttons and are near green LEDs. 
The rotation of knobs do not report values in SW TEST, but depressing the buttons does. Values are approximately [0-3] 040. 
Note if any on these switches are non functional, and if so, 'flick' the surface of the knob of the button to temporarily nudge it into functionality. Then, retest M>V. Occasionally, the effect of one knob button effects other buttons.

In my case, the problem was caused by worn switch contacts behind the PBs. So, replacing the switch units on the K3 front panel PCB fixed the problem.

73 de JH3SIF, Keith


> 2019/09/15 1:37、George Johnson W1ZT <w1zt.ham at comcast.net>のメール:
> 
> Need some direction where to look.
> 
> My K3 seems to have lost control of the front panel buttons.  RF operation
> OK and VFO etc works.  Just no PB control.
> 
> Emailed Support but it is the weekend so I could use any direction of where
> to dig into the radio.  Front panel connections come to mind but any other
> suggestions are greatly appreciated.
> 
> George  W1ZT
> 
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