Re: How to confirm a TV tuner is at fault?

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#519

From: Phil Allison
Date: Mon, 18 Jul 2005 14:31

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"alitonto"
>
> re Teac TV ctm687 This is further to my previous post 17/7/2005.
> After performing many tests on the circuit I find the AGC voltage to be
> higher (7.84) than it is required at I/C TDA8305A (3.9).
> I am not sure what other things to try before actually desoldering the
> tuner.


 **  Try pulling that AGC voltage down to 3.9 volts or so.

 Use a suitably chosen resistor to ground or maybe a 3.9 volt zener.

 See what happens.




........    Phil

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From: "Phil Allison" <philallison@tpg.com.au>
Newsgroups: sci.electronics.repair,aus.electronics
Subject: Re: How to confirm a TV tuner is at fault?
Date: Tue, 19 Jul 2005 00:31:25 +1000
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