[TechAssist] Re: magnavox 25b800, channel scan

  • From: "al m" <ampm@xxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Thu, 26 Dec 2002 17:19:13 -0500

Look at your inputs to the micro from switches if any one of them is wrong
when plugged in that's where your problem is. Do you have scat?
al marquardt
ampm@xxxxxxx


----- Original Message -----
From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, December 26, 2002 4:48 PM
Subject: [TechAssist] Re: magnavox 25b800, channel scan


>
> SYMPTOM: Set turns on by itself, Menu, CH up/dn features
> may operate by themselves
> CAUSE:  Contamination has caused internal short and/or
> low resistance connection in the Switch Assembly.
> SOLUTION: Replace the Customer Keyboard Switch Assembly,
> Reference location S379, Part Number 4835 276 57004.
> ************************************
> Jim Myers
> Since 1972
> Telrad Electronic Services Co.
> Fort Wayne, IN 46815
> ************************************
> ----- Original Message -----
> From: "David Lessard" <mrfixit@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, December 26, 2002 3:38 PM
> Subject: [TechAssist] Re: magnavox 25b800, channel scan
>
>
>
> Larry, I think the micro has lost it's marbles. On power up the stand-by
PS
> provides power to the micro, the micro then waits for a switch closure to
> turn on the relay, etc. Did you confirm the relay isn't stuck? If it turns
> on when you apply power and starts scanning and never stops, I would
> strongly lean towards the micro. The input port on a micro can go bad :-).
> Good luck, wish I had a schematic to help you, sorry.
>
> David Lessard
> Alexandria Electronics
> Alexandria, Ontario
> mrfixit@xxxxxxxxxxx
>
> -----Original Message-----
> From: techassist-bounce@xxxxxxxxxxxxx
> [mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of larry
> Sent: Thursday, December 26, 2002 3:04 PM
> To: techassist@xxxxxxxxxxxxx
> Subject: [TechAssist] Re: magnavox 25b800, channel scan
>
>
>
> well I tried vol+and -
> but no change.
> none of the buttons do anything.
> it just keeps searching for stations.cant turn it of .
> can the eeprom do this?
> Thank you,
> Larry
>
> peggs wrote:
> >
> > Is it in Demo mode ???
> > Volume + & - to Exit Demo
> >
> > Peggs
> >
> > At 11:18 AM 12/26/02 -0500, larry wrote:
> > >
> > >Are any new magnavox s easy to fix?? lol
> > >I seem to have more trouble with them than any others.
> > >This set when plugged in , will turn on automatically and
> > >start scanning up the channels.
> > >I have de-soldered all the push buttons, but it still
> > >continues.
> > >I checked voltage on pin 12 of micro, and it is 4.9, as it
> > >should be.
> > >is the micro bad?
> > >Thank you,
> > >Larry
> > >
> > >
> > >--
> > >Schneider TV & Electronic Inc.
> > >5415 N. Wooster ave.
> > >Dover, Ohio 44622       www.geocities.com/schntv2000/
> > >330-343-0768         FCC. first class & Extra class K8WLY
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> > >
> > Peggs' Electronics
> > 1519 West 2nd Street
> > Owensboro,KY 42301
> > 270-926-4968
> > fax 270-686-7399
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> --
> Schneider TV & Electronic Inc.
> 5415 N. Wooster ave.
> Dover, Ohio 44622       www.geocities.com/schntv2000/
> 330-343-0768         FCC. first class & Extra class K8WLY
> ------------------------------------------
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