[TechAssist] phillips 19" combo model cca191a732 blows 27v zener
- From: "GARY AND JUANITA CHAMBERS" <gchambe3@xxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Sun, 13 Jan 2002 14:13:01 -0500
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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