[Elecraft] K2 no audio output on Part I Test

[Mario Bouchard]

Don,

Thanks for your assistance, it's greatly appreciated, I'll review everything thoroughly once more.  I'll let you know what I find.

73's


Mario Bouchard,

Envoyé de mon iPad
Sent from my iPad

On 2012-10-04, at 20:46, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Mario,
> 
> Yes, U9 pin 6 can have 6.5 volts, but...
> There is capacitor C29 between U9 pin 6 and the AF OUT signal (and the headphone jack) that should block any DC.  If you have 5 volts at the AF OUT signal (P3 pins 7, 8 and 10), then that is a problem.
> 
> You have something shorted to another signal or power supply rail somewhere. Your challenge is to find it.
> 
> 73,
> Don W3FPR
> 
> On 10/4/2012 8:38 PM, Mario Bouchard wrote:
>> Don,
>> 
>> CB U9 #2 and #3 have 1.4mV, #6 has 6.5V and #7 has 13.6V.
>> 
>> Thanks,
>> 
>> 
>> Mario Bouchard,
>> 
>> Envoyé de mon iPad
>> Sent from my iPad
>> 
>> On 2012-10-04, at 20:28, Don Wilhelm <w3fpr at embarqmail.com> wrote:
>> 
>>> U9 #2 and #3 have 1.4mV, #6 has 6.5V has 13.6V.
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