still have a problem.... still TX on power on

[JEAN-FRANCOIS MENARD]

I found last week, with help from a few guys, that my problem was the  
controller on the control board that was defective. I received the one  
yesterday..... plugged it and turn ON the K2..... now  I am able the  
enter menu... the K2 in RX.... finally. But when I added my SSB board,  
I found that the problem come again..... only when the SSB board is  
inserted.

I found that when U1 is there..... pin 6 is short to ground... but  
when I remove U1, pin 6 is OK.....

Is it possible that U1 on the SSB board is defective too !?!?!?!?

Thanks,

73

============================
De Jean-François Ménard / VA2SS



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[Don Wilhelm-4]

Jean-Francios,

I am sorry to tell you that apparently your KSB2 U1 is likely to be damaged.
Is it possible that there was nothing wrong with Control Board U6, but
the entire problem was KSB2 U1?  There is a possibility that both were
bad - that happens, but rarely.

73,
Don W3FPR

Jean-François Ménard wrote:

> I found last week, with help from a few guys, that my problem was the
> controller on the control board that was defective. I received the one
> yesterday..... plugged it and turn ON the K2..... now  I am able the
> enter menu... the K2 in RX.... finally. But when I added my SSB board,
> I found that the problem come again..... only when the SSB board is
> inserted.
>
> I found that when U1 is there..... pin 6 is short to ground... but
> when I remove U1, pin 6 is OK.....
>
> Is it possible that U1 on the SSB board is defective too !?!?!?!?
>

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[JEAN-FRANCOIS MENARD]

I think that U1 was also defective..... because, even with the SSB  
board removed, the K2 was always in TX when powered on.

I will order U1.... sniff...

73


Le 08-09-25 à 21:29, Don Wilhelm a écrit :

> Jean-Francios,
>
> I am sorry to tell you that apparently your KSB2 U1 is likely to be  
> damaged.
> Is it possible that there was nothing wrong with Control Board U6,  
> but the entire problem was KSB2 U1?  There is a possibility that  
> both were bad - that happens, but rarely.
>
> 73,
> Don W3FPR
>
> Jean-François Ménard wrote:
>> I found last week, with help from a few guys, that my problem was  
>> the controller on the control board that was defective. I received  
>> the one yesterday..... plugged it and turn ON the K2..... now  I am  
>> able the enter menu... the K2 in RX.... finally. But when I added  
>> my SSB board, I found that the problem come again..... only when  
>> the SSB board is inserted.
>>
>> I found that when U1 is there..... pin 6 is short to ground... but  
>> when I remove U1, pin 6 is OK.....
>>
>> Is it possible that U1 on the SSB board is defective too !?!?!?!?
>>

============================
De Jean-François Ménard / VA2SS



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[Arie Kleingeld PA3A]

Sorry to come in this thread so late.

Missed it because of a holidays.

Jean-Francois,
I had the same thing about a year ago and had to replace the main
control processor and the sub processor on the ssb board.
They share the ptt line that is directly connected to mic - jack without
any protection or buffering.

When I connected some things to the mic jack (for afsk operations) I
blew up the ptt line because the line for the ptt came from a computer
which did not share the ground connected with the k2 (yet).  Bingo!
(Never had the problem with other transceivers. Well, they do not take a
microprocessor line directly to the outside of the trx.)




73
Arie PA3A




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[JEAN-FRANCOIS MENARD]

Thanks Arie,

I figured this out too lastnight..... I appreciate your email. You are  
confirming me the problem I hve. I hope this time, when the new IC wil  
be installed that everything would be fine.... :-)

73

Le 08-09-26 à 02:06, Arie Kleingeld PA3A a écrit :

> Sorry to come in this thread so late.
>
> Missed it because of a holidays.
>
> Jean-Francois,
> I had the same thing about a year ago and had to replace the main
> control processor and the sub processor on the ssb board.
> They share the ptt line that is directly connected to mic - jack  
> without
> any protection or buffering.
>
> When I connected some things to the mic jack (for afsk operations) I
> blew up the ptt line because the line for the ptt came from a computer
> which did not share the ground connected with the k2 (yet).  Bingo!
> (Never had the problem with other transceivers. Well, they do not  
> take a
> microprocessor line directly to the outside of the trx.)
>
>
>
>
> 73
> Arie PA3A
>
>
>
>
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============================
De Jean-François Ménard / VA2SS



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[Arie Kleingeld PA3A]

Sorry to come in this thread so late.

Missed it because of a holidays.

Jean-Francois,
I had the same thing about a year ago and had to replace the main
control processor and the sub processor on the ssb board.
They share the ptt line that is directly connected to mic - jack without
any protection or buffering.

When I connected some things to the mic jack (for afsk operations) I
blew up the ptt line because the line for the ptt came from a computer
which did not share the ground connected with the k2 (yet).  Bingo!
(Never had the problem with other transceivers. Well, they do not take a
microprocessor line directly to the outside of the trx.)




73
Arie PA3A




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