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Sony KVM1421U sound problem    
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tellyman



Joined: 19 Feb 2013
Posts: 2
Location: scotia

PostPosted: Tue Feb 19, 2013 2:47 pm    Post subject: Sony KVM1421U sound problem Reply with quote

Can anyone suggest a cure for a "golden oldie"?The set is a Sony KVM1421U which is being used with a PVR connected via the scart input.The problem is the sound will start to break up and come and go and eventually disappear.This will happen a couple of minutes after switch on.The sound will come back on and off at different levels.No amount of freezer and hair dryer treatment helps.Any help would be great.
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kuhurdler



Joined: 28 Dec 2006
Posts: 2855
Location: Overland Park, KS

PostPosted: Wed Feb 20, 2013 1:51 pm    Post subject: Reply with quote

This sounds like the makings of a bad tuner, but you indicated it was through the SCART input. So in that case, it's probably a bad solder joint.
JTS1957



Joined: 21 Jan 2009
Posts: 2323
Location: Far, Far Away

PostPosted: Wed Feb 20, 2013 9:09 pm    Post subject: Reply with quote

If thinking AFT drift (AFT detector coil adjustment), the tuner picture would have to be affected too, but as he states its via scart.
tellyman



Joined: 19 Feb 2013
Posts: 2
Location: scotia

PostPosted: Thu Feb 21, 2013 1:20 pm    Post subject: Reply with quote

Just an update guys on the fault i have.I have eventually traced the fault to C012 a 22uf capacitor connected to Q005 base and R045 on the print side damaged because of leakage.Thanks for the interest.
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