Hi,
I verified all voltages in the troubleshooting section... both RX and
TX.
I have a few readings that are not as the manual.
In RX, U7 (RF power module) PIN 1, I have 7.3 and should be to 0 !!!
All other pins are OK.
In TX, U5, the leg on the same side of C9 is 5V and the leg on the
side of C65 drop to 2.7V (should be around 4.7 ???)
All other measurements in the troubleshooting section are in the spec
range.
So, If I consider that my problem is in RX..... Is these results
could help ???
Le 07-01-11 à 20:45, Jean-François Ménard a écrit :
Hi to all,
Last week, my transverter XV50 was unable to receive properly...
Only a small voice in the background... no S unit... the guy
normally give me 10 or 20 over S9... After a new alignment
procedure, I was unable to peak R13 to the desired level. I was
unable to get more than 0.043 V. So my conclusion was that Q3 is dead.
I received a new Q3 transistor. Now it is installed. I did another
alignement. Now with Q3, I can peak R13 very easy to the target of
250mV. Note that before and now, my TX is still perfect. So no
trouble with TX.
But even after Q3 changed.... it is worst. I do not receive
anything at all... not even a small voice in the background.
If I listen to the background noise.... with or without antenna, it
is the same. On the receiver input aligment, my noise generator did
not make any difference ON or OFF.
So I really don't know where to start now. I don't have very much
experience in finding trouble.
If someone could coach me where to start, I will really
appreciate... :-((
Thanks for your times.
===========================
Jean-François Ménard / VA2VYZ
Elecraft K2 #4130 KX1 #999
FISTS #11896
SKCC #2245
Web: http://web.mac.com/jf.menard
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===========================
Jean-François Ménard / VA2VYZ
Elecraft K2 #4130 KX1 #999
FISTS #11896
SKCC #2245
Web: http://web.mac.com/jf.menard
__________________________________________________
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