[TechAssist] Re: Zenith module# 9-1426 power supply problem
- From: Mike Barnett <passthecash@xxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 16 Oct 2001 11:39:08 -0700 (PDT)
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
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