Re: Pioneer VSX-3300 Receiver No Sound


"Hank" <hank_@xxxxxxxxxxxxx> wrote in message
news:dJqdnYxUbfUgWFveRVn-jw@xxxxxxxxxxxxxx
>A Pioneer VSX-3300 has no sound on both channels. Relay protective circuit
> is working (clicks) and the unit tunes fine. I've read about cold solder
> joints with some Pioneer receivers.
> Anyone have data on common failure points with this unit?
> Hank S.
> S. Florida
>
>

A working speaker protection circuit disconnects the speakers. I'll assume
you hear a single click and not a click quickly followed by a second
click -- listen carefully, as the second "off" click is frequently not as
loud as the "on" click.

Btw, output transistors/IC's can blow w/o tripping the protection relay
(they simply open). This is a good place to look for a no audio condition,
and this failure is common across all brands and models -- high-current
devices generally have higher failure rates.

Do any sources other than tuner give sound? If not, a different part that
may be suspect is the source switcher IC -- sometimes switching is done
inside the control processor itself; otherwise there will be a secondary IC
that handles it. I don't have the schemo for your model, so I can't tell ya
the specifics of yours. If the switcher circuit fails, the signal will not
pass from the tuner or other input sources to the amp section, hence no
audio.


.