Re: Pioneer VSX-3300 Receiver No Sound

Thanks to Ray and others for offering suggestions. Both channels are out and
the speaker relay clicks once, but there is no noise even at full volume....
No sounds from all sources. Years ago one channel went out and I remember
replacing a power amp transistor (not the output transistors). No burned
components or flaky-looking solder/traces. The problem is most-likely
related to the mode switching or protective circuits (I've read about newer
models having problems with the DSP chips & cold solder).

Heck, at 18 this receiver was only in middle age. It was driving a pair of
AR1 speakers, which are now connected to my old (reliable) Marantz receiver
:-)

I'll take another look before tossing the unit. Thanks for the comments!
Hank S.
S. Florida

"Ray L. Volts" <raylvolts@xxxxxxxxxxxxxxxxxxx> wrote in message
news:oTJxf.39078$sa4.9993@xxxxxxxxxxx
>
> "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.
>
>


.

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