[TechAssist] Re: Toshiba CF3054J, TAC8950 still vert lin troublesafter C301 & C305 repl.]
- From: "tvservice" <tvservice@xxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 9 Sep 2002 17:46:57 -0500
normally these three caps are all that is needed
i have only replaced ic when it failed
never had one come back for only replacing caps
Robert
tvservice@xxxxxxxxxxxxxxxxxxx
H & H Electronics Inc
----- Original Message -----
From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, September 09, 2002 5:12 PM
Subject: [TechAssist] Re: Toshiba CF3054J, TAC8950 still vert lin
troublesafter C301 & C305 repl.]
>
> I don't believe the voltage rating has anything to do with discharge time.
> That is a factor of capacity, esr, and possibly dialectric absorbtion
> ("memory").
>
> Check for ANY not-black caps, I believe that most of the Toshibas, but not
> all, need three- c301, 305, 308, and sometimes the the 100uf or 220uf.
>
> Wayne Vanaman
> Omega Electronics
> 6904 W Fairfield Dr
> Pensacola, Fl. 32506-3310
>
> 850-456-5995 voice
> 850-458-6369 fax
>
> Mailto:Wayne@xxxxxxxxxxxxxxxxxxxxx
> WWW.PensacolaTVRepair.Com
>
>
> ----- Original Message -----
> From: "Ed Gaidies" <teltek2@xxxxxxxxxxxx>
> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> Sent: Monday, September 09, 2002 4:05 PM
> Subject: [TechAssist] Re: Toshiba CF3054J, TAC8950 still vert lin
> troublesafter C301 & C305 repl.]
>
>
> >
> > Phil......
> > Always....always.......C308......220ufd/35volts.
> > Due to the fact that these 2.2ufd/35 volts are timing
> capacitors.....should
> > never use higher than 50 volts.....discharge time is too great with a
> > 250volt cap. I have never tried to go higher for that reason,,,although
> you
> > may be lucky.
> > BTW...you may have to change the vertical O/P IC too.
> >
> > -Ed-
> > Tel-Tek Electronics
> > Midland, Ontario
> > Canada.
> >
> > teltek2@xxxxxxxxxxxx
> > teltek3@xxxxxxxxxxxx
> > teltek@xxxxxxx
> >
> > "Quality will be remembered....long after Price is forgotten"
> >
> >
> >
> > Phil Bader The above is the reply to your message dated 9/9/02 2:33
PM
> >
> > >
> > >
> > >
> > > 31" Toshiba TV CF3054J: Orig. symptom was very narrow vert. deflection
> > > and fold over.
> > > ESR'd C301 and C305, both 2.2/50V red electrolytics.Both very high,
> > > almost infinate ESR. Replaced both with 2.2/250v @105 deg. (all I
had).
> > > Increased vert. heigth but still narrow by 4 inches top and bottom
with
> > > a top fold over. These two caps always do it. I measured the caps
before
> > > install and are exactly 2.2 mfd. What else am I overlooking here?
> > > Phil Bader
> >
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