[TechAssist] Re: phillips 19" combo model cca191a732 blows 27v zener
- From: "GARY AND JUANITA CHAMBERS" <gchambe3@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 14 Jan 2002 09:04:35 -0500
thanks al, its worth a shot, i'll see if tthat does the trick,
gary
CHAMBERS TV
BRADENTON,FL
SINCE 1982
----- Original Message -----
From: al m <ampm@xxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, January 14, 2002 9:00 AM
Subject: [TechAssist] Re: phillips 19" combo model cca191a732 blows 27v
zener
>
> i had a panasonic tv/vcr do the same thing. they had a zener on the B+
line
> .if the regulator went bad the zener shorted. replaced regulator and zener
> didn't short
> al marquardt
> ampm@xxxxxxx
>
>
> ----- Original Message -----
> From: "GARY AND JUANITA CHAMBERS" <gchambe3@xxxxxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Sunday, January 13, 2002 1:13 PM
> Subject: [TechAssist] phillips 19" combo model cca191a732 blows 27v zener
>
>
> > This unit came in dead with the zener blown in the 27v line in smps.
> > i replaced with a 27v , worked one day blew again.
> > Figured it may be too close to actual voltage,tried a 30v zener.
> > This time worked 2 hours, shorted again.
> > this line feeds the b+ to the vertical output ic,which is good.
> > cant seem to find any other bad components.
> > is this a smps runaway situation?meaning secondaries are going too high?
> > they seem to measure ok with no drift, why is this zener shorting?
> > any ideas?
> > any help is much appreciated,
> > gary
> > CHAMBERS TV
> > BRADENTON,FL
> > SINCE 1982
> >
> >
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