[TechAssist] Re: Magnavox RK5554, 27P1 ch....can't turn off

From: "D Thunhurst" <dthunhurst@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Date: Thu, 2 Jan 2003 17:50:38 -0700

Thanks for the reply.
Is this the famous 100@200v cap you have reference to?  If so, this set
doesn't use it.  C432 on this set is a .1@50v cap.
Daryl
Daryl's TV
3310 Dyer St.
El Paso, TX 79930
915-565-9184
915-564-1024 Fax
http://dynacomp.freeyellow.com
-----Original Message-----
From: TV Doctors <tvdoctors@xxxxxxxxxxxxx>
To: techassist@xxxxxxxxxxxxx <techassist@xxxxxxxxxxxxx>
Date: Thursday, January 02, 2003 4:55 PM
Subject: [TechAssist] Re: Magnavox RK5554, 27P1 ch....can't turn off


>
>
>Change C432
>-------Original Message-------
>
>From: techassist@xxxxxxxxxxxxx
>Date: Thursday, January 02, 2003 01:59:09 PM
>To: TechAssist
>Subject: [TechAssist] Magnavox RK5554, 27P1 ch....can't turn off
>
>Hi,
>This Magnavox is eating my lunch. The set comes on at plug in. The relay
>is used solely for degauss. The on-off circuit is controlled by the micro
>and is giving me "0" volts in the "on" position and ".6" volt at turn off.
>I have replaced Q430, Q431, Q432, Q433, Z430, R437, C435, and C436.
>The schematic shows that the base of Q432 is connected to the micro and I
am
>getting the biasing on that transistor (marked as on-off switch).
>This set is very sensitive to temperature. When components are heated, the
>set can be turned off.
>A simple solution you say?? I thought so too!!
>Every component I stated I replaced was because when I would place the tip
>of the soldering iron just close to each of the various components, the set
>would function properly. Freeze the parts and the set could not be turned
>off.
>I even mounted the parts in question on the bottom of the board as not to
>heat or cool any other part and thought to have confirmed the culprit.
>After replacing the part or parts in question using OEM parts, the same
>symptom occurred, even with the new parts, absolutely no change.
>I am now at a loss as I have replaced or subbed every part that was
effected
>by heating and cooling. Now I know how a new born calf looking at a gate
>must feel.
>Any ideas or advice would be appreciated.
>Thanks
>Daryl
>Daryl's TV
>3310 Dyer St.
>El Paso, TX 79930
>915-565-9184
>915-564-1024 Fax
>http://dynacomp.freeyellow.com
>
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[TechAssist] Re: Magnavox RK5554, 27P1 ch....can't turn off

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