K3 No speaker audio

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K3 No speaker audio

T Gahagan
I operated in the 10 meter contest for several hours yesterday using my K3
and laptop computer using N1MM.  I noticed low audio and increased it by
going to the Hi setting in the config menu.  It helped some but audio still
seemed low.  Speaker audio finally failed completely.  Also, a component(s)
somewhere smoked as I noticed a whisp of smoke rising from the ventilation
slots near the PA.  I quickly pulled all power to the radio.  I have pretty
much dismantled the K3 except for the front panel and cannot find any
damaged components.

After reassembling the K3  and powering  it up and all seems to work
normally except there is no speaker audio.  I noticed a similar failure
occured with the K3 tested by the ARRL and mentioned in their report in
January QST.  My next step will be to pull the front panel off and check out
the DSP board.

I would really appreciate any ideas.

Todd, WA7U

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Re: K3 No speaker audio

Ignacy
See my message today. On 10m once I set the power high, the PA current increase an the radio PA resets.  Bo problem on 12m. It is possibly that something worse happens when the fuse is not working properly. AJ4F thinks that it may be a broken capacitor although he thought of K2.
Ignacy, NO9E