[TechAssist] Re: Philips Magnavox 19PR15, 19A800 chassis, video washed out...

I have set this aside temporarily in the hold area,but I remember I did
see faint video.Although on the cable from the main board to CRT board I
scoped almost nothing on any pins.The high voltage and 1 volt drop on
those 2 watt CRT resistors indicate the CRT is barley being driven. I
suspect a jungle chip, but the orig. are about $23.00. Ane it's a 19"
set...
maybe a "junk" set will yeild one.
Phil Bader

al m wrote:
> 
> Phil I know you probably checked this but is there video on the drives on
> the CRT board? Your Collector voltage should be lower than 193V.
> al marquardt
> ampm@xxxxxxx
> 
> ----- Original Message -----
> From: "armando guerra" <birdie@xxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Friday, January 31, 2003 11:32 AM
> Subject: [TechAssist] Re: Philips Magnavox 19PR15, 19A800 chassis, video
> washed out...
> 
> >
> > You probably have a shorted vertical IC TDA-9302H and diode D409
> > .Also,check R445 and R420.They are probably open.
> > Mando
> > Birdie's TV & Electronics
> > Casa  Grande, AZ
> >
> > Philip Bader wrote:
> >
> > > Still fighting this one.Became a "shop set". Display was totally
> > > black,with HV.and sound.
> > > Turned up G2 on fly to illuminate screen and it did,with the usual
> > > expected white screen and retrace lines from overdrive. But I still at
> > > least see a very faded video signal. I checked the entire CRT board
> > > components,all seem OK, no open resistors or shorted transistors.The
> > > three 2 watt 18K resistors on CRT board feeding the outputs,
> > > (#3314,3324,3334) all have about +194.00V on source sides and about
> > > +193.00V on other sides.The screen control works. I have a full
> > > screen,sound,tuner operation. too faint to see if there is OSD.
> > > At this point I simply want to solve this.It's getting personal ;-)
> > > Wondering if that jungle chip(TDA8373C) is the cause.
> > > Phil Bader
> > > --
> > > Philip Bader
> > > Jan Phyl TV Inc. (estab. 1976)
> > > 3420 Recker Hwy. Winter Haven, Fl. 33880
> > > Fax (863) 299-8821
> > > email: tjanphyl@xxxxxxxxxxxxxxx
> > >
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-- 
Philip Bader
Jan Phyl TV Inc. (estab. 1976)
3420 Recker Hwy. Winter Haven, Fl. 33880
Fax (863) 299-8821      
email: tjanphyl@xxxxxxxxxxxxxxx

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