[TechAssist] Re: Toshiba 57HDX82 - No picture (Repeat failure)
- From: "repair11" <repair11@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 8 Dec 2004 12:11:20 -0600
The D4SBS6 is a Schottky Barrier Diode,60v 4A. SB diodes have greater
forward bias resistance and have less capacitive reactance across diode,
therefore less capacitive current will flow in circuit at high
frequencies,hth.
Charles Betzler
Best Electronics
repair11@xxxxxxx
----- Original Message -----
From: "tvservice" <tvservice@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, December 07, 2004 3:44 PM
Subject: [TechAssist] Re: Toshiba 57HDX82 - No picture (Repeat failure)
> It is high frequency circuit
> I have tried 4 different replacement as well as 4 seperate RCA 243636
diodes
> and none would hold up.
> After giving up and calling Toshiba tech-line they told me MUST use exact
> replacement diode for D851 bridge
>
> I'm sure an exact generic D4SBS6 would work but the original Toshiba
> #23357215 special fast switching is only $4.00
> Robert
> tvservice@xxxxxxxxxxxxx
> H & H Electronics Inc
>
>
> ----- Original Message -----
> From: "Gary McCartney" <gary@xxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, December 07, 2004 3:21 PM
> Subject: [TechAssist] Re: Toshiba 57HDX82 - No picture (Repeat failure)
>
>
> > Just curious, what is there to a bridge rectifier that it needs to be
> > replaced with an exact part? Is it in a high frequency circuit?
> >
> > I've always found that as long as the source is 60 cycles and a bridge
> > is replaced with one of same or higher current and voltage ratings, that
> > there is no problem.
> >
> >
> >
> >
> > Gary McCartney
> >
> > McCartney Electronics
> > Guelph Ontario Canada
> > Est. 1984
> > email: gary (at) number63.ca
> >
> >
> >
> >
> >
> >
> >
> >
> > tvservice wrote:
> > > Also check D851 bridge rectifier for possible leakage or short.
> > > if shorted/leaky will also blow these fuses within several minutes of
on
> > > time.
> > > Replace bridge only with exact Toshiba number
> > > Robert
> > > tvservice@xxxxxxxxxxxxx
> > > H & H Electronics Inc
> > >
> > >
> > > ----- Original Message -----
> > > From: "Dan Garris" <dgarris@xxxxxxxxxxx>
> > > To: <techassist@xxxxxxxxxxxxx>
> > > Sent: Monday, December 06, 2004 4:40 PM
> > > Subject: [TechAssist] Re: Toshiba 57HDX82 - No picture (Repeat
failure)
> > >
> > >
> > >
> > >>Just wanted to be sure I resolder the correct areas to prevent another
> > >>repeat failure.
> > >>This is what I have replied back to me from Dave Van Santen @ Dukes
> > >>Electronics
> > >>250 Edgewood Drive Woodstock, Ont........
> > >>
> > >>....."The set has several pico fuses at the power supply. You likely
> have
> > >
> > > a
> > >
> > >>5A
> > >>and a 2A open. Resolder the poor jumper connections along the side of
> > >>the convergence board where the wire plug/connectors are....."
> > >>
> > >>Thanks, I'll look in that area and resolder all of them!
> > >>
> > >>Dan Garris
> > >>Garris TV
> > >>New Bern, NC
> > >>dgarris@xxxxxxxxxxx
> > >>
> > >>
> > >>>From: "Dan Garris" <dgarris@xxxxxxxxxxx>
> > >>>Reply-To: techassist@xxxxxxxxxxxxx
> > >>>To: techassist@xxxxxxxxxxxxx
> > >>>Subject: [TechAssist] Toshiba 57HDX82 - No picture (Repeat failure)
> > >>>Date: Mon, 06 Dec 2004 17:29:02 -0500
> > >>>
> > >>>Below set came back in next day with same problem....F851 5A open and
> > >
> > > F853
> > >
> > >>>1.25A
> > >>>open again,...
> > >>>
> > >>>....One of the Techs on the three different groups I posted to,
replied
> > >>>back
> > >>>to my post over the weekend about resoldering the board or the set
> would
> > >>>come back with the same blown fuses, well it did come back in. I am
> > >
> > > posting
> > >
> > >>>to ask, where to check to resolder on the board?
> > >>>
> > >>>Garris Radio & TV
> > >>>New Bern, NC
> > >>>Dan Garris
> > >>>dgarris@xxxxxxxxxxx
> > >>>
> > >>>
> > >>>Replaced open Pico fuses on Power Supply board, F851 5A open and F853
> > >
> > > 1.25A
> > >
> > >>>open. All now ok! Picture is restored. This happened after a power
> surge
> > >>>according to customer.
> > >>>
> > >>>Garris Radio & TV
> > >>>New Bern, NC
> > >>>Dan Garris
> > >>>dgarris@xxxxxxxxxxx
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>>From: "Dan Garris" <dgarris@xxxxxxxxxxx>
> > >>>>Reply-To: techassist@xxxxxxxxxxxxx
> > >>>>To: techassist@xxxxxxxxxxxxx
> > >>>>Subject: [TechAssist] Toshiba 57HDX82 - No picture, has Audio??
> > >>>>Date: Sat, 04 Dec 2004 12:17:53 -0500
> > >>>>
> > >>>>What: 57" Big Screen TV
> > >>>>Make: Toshiba
> > >>>>Model: 57HDX82
> > >>>>Chassis: TAC0274
> > >>>>Made: Jan 2003
> > >>>>
> > >>>>Problem: Has good Audio, but NO PICTURE or OSD, Tube filaments are
> > >>>>lighting
> > >>>>up.
> > >>>>
> > >>>>I did a google search appears several people have had this problem
but
> > >
> > > I
> > >
> > >>>>see
> > >>>>no tips on any of my databases. Any Help??
> > >>>>
> > >>>>Garris Radio & TV
> > >>>>New Bern, NC
> > >>>>Dan Garris
> > >>>>dgarris@xxxxxxxxxxx
> > >>>
> > >>>
> > >>>
> >
>
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