[TechAssist] Re: Sony KV27TS27, Blows regulators Q601 & Q602

Resolder the HDT and replace the cap tied to it--I believe a .47uf 50VDC

Jeff Farnsworth
Lyles TV and Appliance
17 S Washington St
Elkhorn, Wi.  53121
ph    262-723-3477
fax   262-723-3658
tech@xxxxxxxxxxx
----- Original Message -----
From: "Ron Miller" <rlmbkm@xxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, August 29, 2002 7:42 PM
Subject: [TechAssist] Re: Sony KV27TS27, Blows regulators Q601 & Q602


>
> Take a close look at the yoke plug, horiz pins sand and recrimp
> connector.HTH
> Country TV
> Ron Miller
> 484 FM444 S.
> Inez,TX 77968-5002
> V.(361)782-6419. F.(361)782-9149
> e-mail: rlmbkm@xxxxxxxx
>
> ----- Original Message -----
> From: <gulftech@xxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, August 29, 2002 7:23 PM
> Subject: [TechAssist] Sony KV27TS27, Blows regulators Q601 & Q602
>
>
> >
> > Techs,
> >
> > This set has me crying "Uncle."  Found F602, 2.5A fuse blown, Q601 &
Q602
> > shorted.  Replaced those along with C650 (330@16v), high ESR.  R647,
> > D622, C613 & Q613 check good.  Applied power.  After 10-15 seconds, pix
> > pulls in on all sides (I think??).  Turned set off.  Regulators were
very
> > warm.
> >
> > Rechecked components in area.  Still found nothing amiss, but replaced
> > Q613 for good measure (2SC4274).  Reapplied power.  Good pix.  Phone
> > rings.  Turn head.  POW!  Back to square one.
> >
> > Have done many of this sets without a hitch.  The transistors I use are
> > Sony originals, carefully checked before installation and again after
the
> > first trial.  Resoldered the driver transformer for grins.  This set
does
> > not use the VCR's common to fail on other models.
> >
> > Any suggestions appreciated,
> >
> > TIA,
> >
> >
> > Ken Smith
> > Gulf Technical Services
> > 3034 Gulf Breeze Parkway
> > Gulf Breeze, FL  32563
> > 850-934-8324 (Voice) 850-932-0819 (Fax)
> >
> >
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