STR-AV260 Sony amplifier problem

[RF]

Hi Experts,

I have this Sony Receiver/Amplifier and the Phono circuit appears to be
blown because of a short
in the (phono) connecting wires.

Anyone know where I might get a wiring diagram?

With that in hand I expect to have a few more questions

TIA

RF

 

[N Cook]

Hi Experts,

I have this Sony Receiver/Amplifier and the Phono circuit appears to be
blown because of a short
in the (phono) connecting wires.

Anyone know where I might get a wiring diagram?

With that in hand I expect to have a few more questions

TIA

RF

Is there still a short when you plug phono/RCA plugs into those sockets ?

 

[Mark D. Zacharias]

Hi Experts,

I have this Sony Receiver/Amplifier and the Phono circuit appears to be
blown because of a short
in the (phono) connecting wires.

Anyone know where I might get a wiring diagram?

With that in hand I expect to have a few more questions

TIA

RF

I think you are the same fellow with the Dual turntable, yes?

Shorting the inputs of a phono section would not damage it - this is done
all the time to reduce noise on an unused input. Doesn't mean the phono
op-amp might not be bad, or getting no power, though...

When you say "short" do you mean channel(s) cutting out? People often use
the term that way even though it is technically incorrect.

Mark Z.

 

[RF]

I think you are the same fellow with the Dual turntable, yes?

Shorting the inputs of a phono section would not damage it - this is done
all the time to reduce noise on an unused input. Doesn't mean the phono
op-amp might not be bad, or getting no power, though...

When you say "short" do you mean channel(s) cutting out? People often use
the term that way even though it is technically incorrect.

Mark Z.

Thanks Neil and Mark for your answers.

Yes, I am the DUAL guy, this time looking at the amplifier. Both phono
and amplifier were
on a broad desk across which I had to reach to reach the connections
at the rear of the amplifier.
The ground from the phono was attached via a screw to the amplifier case
right beside the RCA phono
connections. The RCA plugs of the turntable were a very tight fit and I
had to struggle to extract them because I
was leaning across that desk. Eventually they let go and I heard a loud
pop. I'm not sure where it
came from but, after that incident, the amplifier had no buzzing sound
in response to a paper clip in one of the phone
inputs. I probably should have shut off everything before moving the cords.

Now I just checked the phone connections again and, to my huge
embarrassment and relief, the buzzing sound is back.
I'm off to hide in the cellar for a few days.

Thanks again guys. Now I guess I have only one problem instead of two.
Thanks for fixing one of them

Now back to the DUAL, hoping that I don't blow something else up ;-)

RF

 

[RF]

I think you are the same fellow with the Dual turntable, yes?

Shorting the inputs of a phono section would not damage it - this is done
all the time to reduce noise on an unused input. Doesn't mean the phono
op-amp might not be bad, or getting no power, though...

When you say "short" do you mean channel(s) cutting out? People often use
the term that way even though it is technically incorrect.

Mark Z.

Thank you N. C. and Mark for your comments.

I made a hasty response here earlier today and deleted it in favor of
something more coherent,
which I hope this is.

Yes, I am the DUAL guy, this time looking at the amplifier. While trying
to persuade the phono and
amplifier to work together last week, I heard a loud pop from somewhere
and soon afterwards I could get no buzz
from the amplifier in response to a paper clip. I thought I had blown it.

This morning, I switched on the amplifier again and "tested" the phono
connections with a paper clip - they are ok, to my huge relief, so the
problem I reported here may no longer be a problem. Buzzing doesn't mean
that it will function normally,
of course, but it seems to be a good indication.

So, I'm happy to say that I can lay this amplifier aside for a while and
get back to examining the turntable, hoping that I don't blow something
else up ;-)

Have a great weekend. Mine has improved greatly

RF