[Kenwood] TS-850S help

[Guillermo]

Hello  Curt:

W4svx@aol.com escribi�:

> In a message dated 05/21/2002 7:29:57 PM Eastern Daylight Time,
> nagato@arnet.com.ar writes:
>
>
>
>>     Maybe the carrier oscillator is failing. I don't remember where
>> is the
>> affected board located. It is one containing four nice square 80
>> pins or
>> so IC's, and it is a common fail in that equipment (old S/N at
>> least). I
>> must see the manual to be sure.
>> If you raise volume to max, do you hear distorted audio but not as
>> powerful as in AM?.
>>
>> Good luck
>> Guillermo - LU8EYW.
>>
>
> Hi Guillermo,
>
> Thanks for your suggestions. Yes, I have dealt with that board before,
> it contains 4 DDS chips, a couple have already been replaced. Offhand,
> I can't see how a failure there could be the problem, but there
> certainly could be. When the volume is turned up in SSB/CW, there is a
> faint sound in the speaker. Thanks again for your input.
>
> 73, Curt, K4TL

Ok, I think the fault is from one of these chips, that generates the 8xx
MHz carrier frequency. Perhaps, it could be only a cold solder at the
resistor arrays located in the bottom of the board. Sorry, but I have
not the service manual at hand now, maybe tomorrow. I'll look at it to
tell you better.

Good luck
Guillermo - LU8EYW.


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