[TechAssist] Re: Zenith module# 9-1426 power supply problem
- From: "Shaun" <ssroark@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 16 Oct 2001 18:09:26 -0600
I am an authorized Zenith repair center. Tomorrow I will call zenith tech
support and ask them if they have heard of this problem I will let you know
tomorrow night.
----- Original Message -----
From: "Mike Barnett" <passthecash@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, October 16, 2001 12:39 PM
Subject: [TechAssist] Re: Zenith module# 9-1426 power supply problem
>
> The transisor they refer to is qx3401//IRF830=nte2398. I replaced this,
the
> squeel has lowered in noise but is still noticable. Not sure what else to
> do. I guess it's time to send it home.
> If anyone has a good resalution to this problem please post.
>
> Thanks
> Mike
>
>
>
>
> On Mon, 15 Oct 2001 21:27:02 -0600, techassist@xxxxxxxxxxxxx wrote:
>
> >
> > I also had one of these repaired by PTS and it has a squeel in standby
I
> > never found the problem but PTS said its a bad transistor near the back
> left
> > corner of the module that has a heat sink attached to it the transistor
> was
> > out of sink with the coil it goes to it worked fine just squeeled in
> > standby.
> > ----- Original Message -----
> > From: "Mike Barnett" <passthecash@xxxxxxxxxx>
> > To: <techassist@xxxxxxxxxxxxx>
> > Sent: Monday, October 15, 2001 12:02 PM
> > Subject: [TechAssist] Zenith module# 9-1426 power supply problem
> >
> >
> > >
> > > This unit came in with horizonal retrace lines and no video, Checked
> video
> > > out transistors on crt board and found only 12vdc on collector.
> > > replaced rx3277/2.7ohm 1/2 watt resistor. This took care of the
> problem.
> > The
> > > set works fine exept for squeel coming from qx3401 when set is in
> stanby.
> > I
> > > checked all caps in this caps in this curcuit, all are fine. Anyone
> know
> > > what might be causing this device to squeel?
> > >
> > > TIA,
> > > Mike
> > >
> > >
> > >
> > > Get It Fixed At
> > > Rochester Electronics
> > > 630 West Ridge Rd.
> > > Rochester, NY 14615
> > > 716.663.6870
> > > www.RochesterElectronicsRepair.com
> > >
> > >
> > >
> > >
> > >
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>
> Get It Fixed At
> Rochester Electronics
> 630 West Ridge Rd.
> Rochester, NY 14615
> 716.663.6870
> www.RochesterElectronicsRepair.com
>
>
>
>
>
> _______________________________________________________
> Send a cool gift with your E-Card
> http://www.bluemountain.com/giftcenter/
>
>
> Help make your TechAssist online repair tips
> database better! Submit your fixes here:
> http://www.circuitwork.com/techassist/tip/#tips
> To unsubscribe write to:
> techassist-request@xxxxxxxxxxxxx
> with unsubscribe in the subject line.
Help make your TechAssist online repair tips
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