[TechAssist] Re: JVC 27" AV-27020
- From: "Tel-Tek Electronics" <teltek@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 13 Feb 2002 16:05:57 -0500
Thanks Charles.
Yup you were correct D422..(75volt zener) was also defective, along with a
leaky C424 (100ufd/33volts).
And of course IC421, (LA7832). I have an LA7830 in there at the moment, but
seem to be running a little warm, maybe I should go to an LA7833, what do
you think?
-Ed-
teltek@xxxxxxxxxxx
TEL-TEK ELECTRONICS.
----- Original Message -----
From: "repair1" <repair1@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Wednesday, February 13, 2002 1:51 PM
Subject: [TechAssist] Re: JVC 27" AV-27020
>
> That would be an la 7832, there is a zener diode around ic you should
change
> pn mtzj75-t2, I have used an la 7833 without any problems hth
> charles betzler
> Best Electronics
> repair1@xxxxxxxxxxxxx
>
>
>
>
> ----- Original Message -----
> From: "Tel-Tek Electronics" <teltek@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, February 13, 2002 11:53 AM
> Subject: [TechAssist] Re: JVC 27" AV-27020
>
>
> >
> > Sorry Guys...I was working on the wrong IC.
> > Should have checked IC421, which IS the vertical.
> >
> > Diregard the message below.
> > If someone knows the generic number for IC421, please let me know since
> the
> > numbers are blown off of this one, all I have is ***832.
> >
> > Thanks.
> >
> > -Ed-
> > teltek@xxxxxxxxxxx
> > TEL-TEK ELECTRONICS.
> >
> >
> >
> >
> >
> > ----- Original Message -----
> > From: "Tel-Tek Electronics" <teltek@xxxxxxxxxxx>
> > To: "AAAA TECH-ASSIST" <techassist@xxxxxxxxxxxxx>
> > Sent: Wednesday, February 13, 2002 12:32 PM
> > Subject: [TechAssist] JVC 27" AV-27020
> >
> >
> > >
> > > Have a JVC set her that powers up, 4 seconds later shuts down and
power
> > > light will start to flash.
> > > Have checked all in regulator and horizontal checks OK.
> > > If I disconnect the Vertical plug from the yoke, set will stay on with
> no
> > > vertical.
> > > It uses an LA4446 vert OP IC, which I don't have in stock. Although if
I
> > > remove the Vert O/P IC from the circuit, same type of shut down
occurs.
> > > So only when I disconnect the vert from the yoke will it stay on.
> > > Any help appreciated.
> > >
> > > -Ed-
> > > teltek@xxxxxxxxxxx
> > > TEL-TEK ELECTRONICS.
> > >
> > >
> > >
> > >
> > >
> > >
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