[vdr] Re: burned DVB-s

["Rienecker, Fa. Evenio, ITS P, M" <C.Rienecker@deutschepost.de>]

> -----Original Message-----
> From: domolink morocco [mailto:domolink@iam.net.ma]
> Sent: Friday, October 18, 2002 11:50 AM
> To: vdr@linuxtv.org
> Subject: [vdr] Re: burned DVB-s
> 
> 
> Hi all
> can we say tha t the common ground of the RCA wire that 
> connect video output
> of a dvb rev1.3 to the RCA of the TV entry is enough grounded 
> to be called
> common groung or do we need to connect another free wire 
> between all the
> coponent to make sure a 100% that everything is grounded ??
> 
> Tx MedMed

That should be enough except if you start to unplug it and replug it while the system has power....

CU,
Christian. 

> 
> ----- Original Message -----
> From: "Roberto Deza" <rdeza@unav.es>
> To: <vdr@linuxtv.org>
> Sent: Friday, October 18, 2002 9:14 AM
> Subject: [vdr] Re: burned DVB-s
> 
> 
> > Hi,
> >
> > At 13:30 17/10/2002 +0200, Sergei Haller wrote:
> >
> > >Yesterday I disconnected the composite video cable between my dvb-s
> (v2.1)
> > >and  the  TV set and after connecting it again, I had no 
> picture any
> more.
> > >Sound  and  everything else is ok. Just no video. The tv 
> set and the
> cable
> > >work just fine, the dvb-s on an other tv set does not work.
> > >
> > >So I suppose, that I burned something while 
> (dis-)connecting the cable.
> > >
> > >Does someone have an idea what I can look for and where.
> >
> > I'm sorry by your card but I don't have any hope that this 
> problem can
> > have any recovery, if your card is really damaged :-( ; the 
> Composite
> > Video goes out directly from the AV711x and any 
> semiconductor is very
> > easy to broken.
> >
> > Many times, the reason of this type of problems is the lack 
> of a "common
> > ground" between the to be interconnected devices. The 
> "common ground" is
> > a simple wire that *permanently* interconect the metal chasis of all
> > devices (in your case, the PC and your TV) and is not need 
> that this wire
> > will be connected to a real Ground.
> >
> > This common ground precaution is extensive to every device 
> that need to
> > be connected to the PC as, printers, scaners, STBs (perhaps 
> with some
> > BDM, JTAG, etc interface), etc. Regrettably, I've heard and 
> know myself
> > many of this problems.
> >
> > IMHO, this *security measures* are not too know and commented, as it
> > should be :-((.
> >
> > >There  are  the  connectors J3,J4 (for CD-audio) and J8. 
> Is it possible
> to
> > >connect the tv set via J8? (I'm afraid, no. right?)
> >
> > You are right, is not possible. Nor in a revision <2.1, 
> with J2, could
> > have much hope, as there is only *one* Composite Video 
> output coming out
> > of AV711x, wich is also need on the RGB (for the TV Syncs) 
> and S-VIDEO
> > modes.
> >
> >
> > Best regards:
> > --
> > Roberto Deza Asensio
> > Universidad de Navarra
> > Data Procesing Center
> > rdeza@unav.es
> >
> >
> > --
> > Info:
> > To unsubscribe send a mail to listar@linuxtv.org with 
> "unsubscribe vdr" as
> subject.
> >
> 
> 
> 
> -- 
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