[TechAssist] Re: Fw: Zenith TV (SM2771S) NO video retrace lines bright screen !
- From: "repair1" <repair1@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 15 Nov 2002 12:25:05 -0600
I am sorry that I did not se all of your post header, If you have bright
lines and no video, check collectors of video drivers on crt board, if v
absent trace backwards and find supply, also there is a small transitor on
crt board that will cause similar symptoms, hth.
charles betzler
Best Electronics
repair1@xxxxxxxxxxxxx
----- Original Message -----
From: "repair1" <repair1@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 15, 2002 10:31 AM
Subject: [TechAssist] Re: Fw: Zenith TV (SM2771S) NO video retrace lines
bright screen !
>
> If unit has comb filter look for bad connections,hth.
>
> charles betzler
> Best Electronics
> repair1@xxxxxxxxxxxxx
>
>
> ----- Original Message -----
> From: "Bruce Tiedeman" <btied@xxxxxxxxxxxx>
> To: "Techassist@xxxxxxxxxxxxx" <techassist@xxxxxxxxxxxxx>
> Sent: Friday, November 15, 2002 9:25 AM
> Subject: [TechAssist] Fw: Zenith TV (SM2771S) NO video retrace lines
bright
> screen !
>
>
> >
> >
> >
> > > Fellow Tech's,
> > >
> > > Zenith SM2771S No video. (9-1447) Print needed.
> > >
> > > Hope some one can share a partial print, of video section. I am
working
> > off
> > > a print for a SL 2767 and is close but not the same. I have a video
> signal
> > > to the Q1200 but from there can't follow. I have replaced the video
> > > processor IC, LA 7672 still same problem. This schematic shows video
to
> > pin
> > > 42 of the mentioned IC but there is none , Suspect video transistor.
> > >
> > > thanks
> > > Bruce
> > >
> > > B&T Electronics
> > > 139 Margaret St
> > > Sarnia Ontario
> > > Canada
> > > N7T 2Y3
> > > (519) 344-1850
> > > btied@xxxxxxxxxxxx
> > >
> >
> >
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