[TechAssist] Re: RCA F32632SB, CTC187CN3 dead.STL730 shorted,other,now blows C4107

  • From: "George" <grndmstrg@xxxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 25 Aug 2003 10:35:56 -0700

Did you put it in with proper polarity?

George
Afana Electronics
Moreno Valley, CA

----- Original Message -----
From: "Philip Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, August 25, 2003 8:51 AM
Subject: [TechAssist] RCA F32632SB, CTC187CN3 dead.STL730 shorted,other,now
blows C4107


> Came in dead. Measured short across HOT collector. I do a "kit" with
> these when STK or HOT shows short.
> Ordered and installed:
> HOT Q4401 223942
> C4402 206008
> CR4402 242907
> CR4403 243636
> U4101 STK730-150, used OEM 223948
> Fly T4401 223952
> After installing above,I noted:
>  Orig. HOT was OK. (short was measured across it in circuit),
> and  I also did find  a diode CR4106 shorted, so replaced that,too.
> NOW:
>  Plugged set in,heard a raspy buzz from the SMPS. Located ,replaced
> C4127 (10MFD/63V,low value, read 7mfd) in smps area.
> Now rasp gone,but plugged in and "Hisssssss-POW!" the 100MFD/250 cap
> (C4107, or 107K) blew apart! Checked diode going to it, OK.New. Replaced
> with another cap,gets hot in seconds,would blow.
> Originally this cap was OK in the set. I cannot figure if I injected
> something,or what. Is the SMPS runnung away?
> Need input here.
> I suspect the orig. failed parts were the CR106 I found shorted and the
> STK in the smps.
> Why is this big 100MFD C4107 cap blowing???
> Help.
> Phil Bader
> --
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
> For Professional Technicians Only
>
>
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