Re: Stereo problem

From: Ampdoc (ampdoc_at_NOSPAMhotmail.com)
Date: 07/09/04 

Date: Thu, 8 Jul 2004 23:51:13 -0500

Sharp usually uses an STK for an audio output. I'd suspect that the STK is
failing when warm. Most common failures in those units are the STK and the
pickup assembly (laser) for the CD. The fans in the unit are actually
connected via a bridge rectifier to the audio output on most sharp units, so
as the output gets louder the fans speed up. If your fans are turning with
the unit at zero volume, I'd suspect some DC bias from the output. They
should not be on at all with no audio out. Some units may differ, but I have
yet to see a Sharp made any other way. A model number would be helpful as I
could look up a manual if it is a US model, however from the original
poster's use of the word "dodgy" I'd suspect he's from the UK. 

-- 
Jammy Harbin
J & J Electronics, Inc.
227 S. 4th St.
Selmer, TN 38375
731-645-3311
"Mark D. Zacharias" <mzacharias@yis.us> wrote in message
news:2l67dtF9j5elU1@uni-berlin.de...
> Could be that one or more speaker wires are indeed shorting together.
> Another possibility is bad solder connections.
>
> Many other potential causes. Welcome to the exciting world of electronics
> repair.
>
>
> Mark Z.
>
> -- 
> Please reply only to Group. I regret this is necessary. Viruses and spam
> have rendered my regular e-mail address useless.
>
>
> "Eddie" <spagheddie@gmail.com> wrote in message
> news:13cf740d.0407081556.7c56b83c@posting.google.com...
> > was given a broken sharp 5.1 stereo, they said when you play a CD it
> > cuts out, and they even tried to get it fixed. They only ever used it
> > for tuner/CD, and out of those two, CD is the only one that puts out
> > through the front speakers. I then tried it with some aux inputs that
> > went through the front speakers and alas my problem was replecated, so
> > its doing dodgy stuff when using the front speakers. It's behaviour
> > when it shuts down (blinking timer light) is described in the manual
> > as speaker shorting/over heating, so last night I open it up to see
> > any obvious problems, I notice two not very fast fans, when a company
> > put two fans into a stereo you know its prone to overheating. This
> > morning I left the covers off, and it's currently playing a CD and
> > it's up to track 9(as opposed to 30 seconds earlier), so I think its
> > just overheating.
> >
> > Any suggestions how to keep it cool? I dont plan on running it with
> > the sides off, because its dangerous and stupid, at the moment its
> > sitting on wood on lino just to be safe, so any ideas what I can do?
>
>

Relevant Pages

  • Re: Stereo problem
    ... > Sharp usually uses an STK for an audio output. ... The fans in the unit are actually ...
    (sci.electronics.repair)
  • HDTV has no "Analog Audio Output"
    ... The HDTV has one extra monitor RCA audio output ... available from Monitor-Out, but need to turn off internal speakers ... Digital audio output available at Digital Audio Output ... analogue audio signal at the internal speakers, ...
    (sci.electronics.misc)
  • HDTV has no "Analog Audio Output"
    ... The HDTV has one extra monitor RCA audio output ... available from Monitor-Out, but need to turn off internal speakers ... Digital audio output available at Digital Audio Output ... analogue audio signal at the internal speakers, ...
    (sci.electronics.repair)
  • HDTV has no "Analog Audio Output"
    ... The HDTV has one extra monitor RCA audio output ... available from Monitor-Out, but need to turn off internal speakers ... Digital audio output available at Digital Audio Output ... analogue audio signal at the internal speakers, ...
    (sci.electronics.design)
  • HDTV has no "Analog Audio Output"
    ... The HDTV has one extra monitor RCA audio output ... available from Monitor-Out, but need to turn off internal speakers ... Digital audio output available at Digital Audio Output ... analogue audio signal at the internal speakers, ...
    (alt.tv.tech.hdtv)