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

Article View: sci.electronics.repair

Article #482

Back to sci.electronics.repair Previous Next

#482

From: Tom MacIntyre
Date: Sat, 06 Aug 2005 16:21

35 lines
1857 bytes

Isn't a typical AGC voltage about 8 volts?

Tom

PS - I'm NOT sorry for the top-post. If it fits the screen...

On Tue, 19 Jul 2005 00:31:25 +1000, "Phil Allison"
<philallison@tpg.com.au> wrote:

>
>"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
>
>
>
>
>

Technical Details

Message-ID: <cqo9f19rckoac62bku66868p14bd2322o7@4ax.com>

Path:

arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!news.glorb.com!wns14feed!worldnet.att.net!207.35.177.252!nf3.bellglobal.com!ursa-nb00s0.nbnet.nb.ca!53ab2750!not-for-mail

References: <1121692367.684276.178280@f14g2000cwb.googlegroups.com> <3k1spqFs6cbeU1@individual.net>

Show Full Headers

Complete Article Headers

X-Google-Thread: 1131b0,a749db4b04a371b9
X-Google-Thread: 103407,a749db4b04a371b9
X-Google-Attributes: gid1131b0,gid103407,public
X-Google-Language: ENGLISH,ASCII-7-bit
Path: arc1-ca.pugleaf.net!g2news1.google.com!news3.google.com!news.glorb.com!wns14feed!worldnet.att.net!207.35.177.252!nf3.bellglobal.com!ursa-nb00s0.nbnet.nb.ca!53ab2750!not-for-mail
From: Tom MacIntyre <tom__macintyre@hotmail.com>
Newsgroups: sci.electronics.repair,aus.electronics
Subject: Re: How to confirm a TV tuner is at fault?
Reply-To: tom__macintyre@hotmail.com
Message-ID: <cqo9f19rckoac62bku66868p14bd2322o7@4ax.com>
References: <1121692367.684276.178280@f14g2000cwb.googlegroups.com> <3k1spqFs6cbeU1@individual.net>
X-Newsreader: Forte Free Agent 1.92/32.570
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 36
Date: Sat, 06 Aug 2005 16:21:43 GMT
NNTP-Posting-Host: 142.177.205.75
X-Complaints-To: abuse@aliant.net
X-Trace: ursa-nb00s0.nbnet.nb.ca 1123345303 142.177.205.75 (Sat, 06 Aug 2005 13:21:43 ADT)
NNTP-Posting-Date: Sat, 06 Aug 2005 13:21:43 ADT
Organization: MPowered-Subscriber

Reply to Parent Message