[TechAssist] Re: Toshiba TP50F90 color intermittent
- From: "Ian Scott" <service.depot@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Mon, 28 Nov 2005 12:04:43 -0500
Hi Jerry, no, this problem is not resolved yet. The set is being
brought into my shop for further troubleshooting. I will be keeping in
mind all of the input received. I will post the results. Thanks to
everyone!
Ian Scott
----- Original Message -----
From: "GERALD GANN" <alpha21century1234@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Sunday, November 27, 2005 1:16 AM
Subject: [TechAssist] Re: Toshiba TP50F90 color intermittent
> Just catching up. Boy I am glad you guys finely got that straitened
out. A lot of good info came out of it and I saved some of it. My
question is did the intermittent color problem get resolved?
>
> Jerry
>
> Alpha 21 Electronics
>
> Granite City, IL 62040
>
> 618-452-8620
>
> alpha21century1234@xxxxxxxxxxxxx
>
>
> tjanphyl@xxxxxxxxxxxxxxx wrote:Understood now.
> In the case of many-layered boards, these internal layers only have
> connecting traces,not any components in between I assume.It is to
> allow for more wire density without more surface area boards.
> I see. If they needed 400 traces to wire a PCB, it is more compact
> to ,say, have 8 layers with 50 traces= the 400 needed instead of a
> board many times larger.
> Phil
>
>
> Phil Bader, Pres.
> Jan Phyl TV Inc
> Winter Haven, Fl
> (863) 299-8821
> Confounding the wise since 1976
> personal email: pbader@xxxxxxxxxxxxxxx
>
> ----- Original Message -----
> From: becyn
> Date: Friday, November 25, 2005 7:32 pm
> Subject: [TechAssist] Re: Toshiba TP50F90 color intermittent
>
> > Well, then the question is which one of those very tiny holes
> > is
> > the culpret.
> > In the case of a simple old fashioned double-sided, you might be
> > able to
> > snake some
> > wire wrap gauge wire through the hole and solder both sides. That
> > might
> > be OK if there's just a few.
> >
> > However, on a multi- layer pcb there's no definitve way to "know"
> > you've
> > sufficiently flowed the
> > contacts to the inner layers. Besides the holes on these scan
> > converters
> > are about the diameter of a needle and they have a boat load of
them.
> >
> > IMHO it's better to just replace the module than to aggravate
> > myself
> > with something that might or might not get fixed after all that
> > effort.
> > Sorry...NO CAR , just an opinion from "Dr. Jim" ! ;-)
> >
> > Jim McVey
> > McVey Alltronix
> > 327 Broadway
> > Newburgh N.Y. 12550
> >
> > "If it doesn't play...
> > CALL MCVEY !!!!!!"
> > Factory authorized
> > service for over 20
> > major brands.
> > 845 561 8383
> > (Last of the Mohegans)
> >
> >
> >
> >
> > tjanphyl@xxxxxxxxxxxxxxx wrote:
> >
> > >OK. Now: since I am showing my ignorance here I might as well go
> > for
> > >the car, behind door #2!
> > >How exactly does a hole "go bad"? You mean poor solder flow thru
> > them?
> > >Reflow solder is the fix?
> > >Phil
> > >
> > >Phil Bader, Pres.
> > >Jan Phyl TV Inc
> > >Winter Haven, Fl
> > >(863) 299-8821
> > >Confounding the wise since 1976
> > >personal email: pbader@xxxxxxxxxxxxxxx
> > >
> > >----- Original Message -----
> > >From: becyn
> > >Date: Friday, November 25, 2005 5:16 pm
> > >Subject: [TechAssist] Re: Toshiba TP50F90 color intermittent
> > >
> > >
> > >
> > >>You know, 'through holes" to make connections on multi-layered
> > and
> > >>double sided boards?
> > >>"Via" is the pcb industry "politically correct" term for the
> > things.>>
> > >>Jim McVey
> > >>McVey Alltronix
> > >>327 Broadway
> > >>Newburgh N.Y. 12550
> > >>
> > >>"If it doesn't play...
> > >>CALL MCVEY !!!!!!"
> > >>Factory authorized
> > >>service for over 20
> > >>major brands.
> > >>845 561 8383
> > >>(Last of the Mohegans)
> > >>
> > >>tjanphyl@xxxxxxxxxxxxxxx wrote:
> > >>
> > >>
> > >>
> > >>>have bad via's ????
> > >>>Phil
> > >>>
> > >>>Phil Bader, Pres.
> > >>>Jan Phyl TV Inc
> > >>>Winter Haven, Fl
> > >>>(863) 299-8821
> > >>>Confounding the wise since 1976
> > >>>personal email: pbader@xxxxxxxxxxxxxxx
> > >>>
> > >>>----- Original Message -----
> > >>>From: becyn
> > >>>Date: Friday, November 25, 2005 1:46 pm
> > >>>Subject: [TechAssist] Re: Toshiba TP50F90 color intermittent
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>>Yes, Toshiba's "hyper or scan converter pcb's have been
> > dropping
> > >>>>like
> > >>>>flies lately around here.
> > >>>>Some of them seem to have bad via's which are sensitive to
> > >>>>tapping, or
> > >>>>twisting the can slightly.
> > >>>>
> > >>>>Jim McVey
> > >>>>McVey Alltronix
> > >>>>327 Broadway
> > >>>>Newburgh N.Y. 12550
> > >>>>
> > >>>>"If it doesn't play...
> > >>>>CALL MCVEY !!!!!!"
> > >>>>Factory authorized
> > >>>>service for over 20
> > >>>>major brands.
> > >>>>845 561 8383
> > >>>>(Last of the Mohegans)
> > >>>>
> > >>>>Carol Rundle wrote:
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>If your model has standup shielded module( hyper brd.) just
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>behind A/V jack panel, try a little freeze, and heat,
> > inside
> > >>>>module. if it simulates your symtoms, remove brd., ESR
> > lytics
> > >>>>
> > >>>>
> > >>,
> > >>
> > >>
> > >>>> I've repaired several Toshiba hyper brd's, found
> > >>>>weak,leaky smd lytics, usually find several (8-10)weak,leaky !
> >
> > >>>>Causing symtom's similar to your 's.. hth
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>Bill
> > >>>>>Bill'sTV
> > >>>>> Sonora,Calif.
> > >>>>>
> > >>>>>
> > >>>>>Ian Scott wrote:Hello, This set
> > is
> > >>>>>
> > >>>>>
> > >>in
> > >>
> > >>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>the customer's home and intermittently loses
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>color. When there is no color, the black and white picture
> > has
> > >>>>>
> > >>>>>
> > >>a
> > >>
> > >>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>noise>in it that appears like you're looking through a screen
> > >>>>door. Both the
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>main picture and PIP will lose color. When I remove the rear
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>cover to
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>work on it, after 10 minutes or so the problem won't occur
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>anymore. I
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>have tried to heat up the pc boards with a hair dryer, but
> > the
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>symptom>won't return (until I leave). I suspect the comb filter.
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>The customer normally watches digital cable and he has had
> > the
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>cable box
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>replaced. I have asked the customer to try using his DVD to
> > see
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>if it
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>loses color as well, but so far the results are inconclusive.
> > >>>>>Thanks in advance for any help.
> > >>>>>Ian Scott
> > >>>>>Service Depot
> > >>>>>252 Lasalle Blvd.
> > >>>>>Sudbury, ON
> > >>>>>P3A 1W6
> > >>>>>705-566-3557
> > >>>>>Fax 705-566-3455
> > >>>>>
> > >>>>>
> > >>>>>--------------------------------------------------------------
> > --
> > >>>>>
> > >>>>>
> > >>--
> > >>
> > >>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>-----------
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>This Email List is accessible to the general public through
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>search engines. Remove: http://www.tech-assist.org/remove.htm
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>Set Vacation
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>20vacation>Lost Password: http://www.tech-assist.org and select
> > >>>
> > >>>
> > >>"Login
> > >>
> > >>
> > >>>Problems?".
> > >>>
> > >>>
> > >>>
> > >>>
> > >>>>>Email Archives: //www.freelists.org/archives/techassist/
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>Carol Rundle
> > >>>>>brundle@xxxxxxxxxxxxx
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>--------------------------------------------------------------
> > --
> > >>>>>
> > >>>>>
> > >>--
> > >>
> > >>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>-----------
> > >>>>
> > >>>>
> > >>>>
> > >>>>
> > >>>>>This Email List is accessible to the general public through
> > >>>>>
> > >>>>>
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> > >>>>>
> > >>>>search engines. Remove: http://www.tech-assist.org/remove.htm
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> > >>>>>Set Vacation
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> > >>>>>
> > >>>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%
> > >>>>
> > >>>>
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> > >>>20vacation>Lost Password: http://www.tech-assist.org and
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> > >>>>>Email Archives: //www.freelists.org/archives/techassist/
> > >>>>>
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> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>>
> > >>>>--
> > >>>>No virus found in this outgoing message.
> > >>>>Checked by AVG Free Edition.
> > >>>>Version: 7.1.362 / Virus Database: 267.13.7/182 - Release
> > Date:
> > >>>>11/24/05
> > >>>>---------------------------------------------------------------
> > --
> > >>>>
> > >>>>
> > >>--
> > >>
> > >>
> > >>>>----------
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> > >>>>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%
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> > >
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> > >>>----------------------------------------------------------------
> > --
> > >>>
> > >>>
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> > >>
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> > >>>This Email List is accessible to the general public through
> > >>>
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> > >>search engines. Remove: http://www.tech-assist.org/remove.htm
> > >>
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> > >>mailto:ecartis@xxxxxxxxxxxxx?subject=set%20techassist%
> > >>
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> > >>>Email Archives: //www.freelists.org/archives/techassist/
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> > >>--
> > >>No virus found in this outgoing message.
> > >>Checked by AVG Free Edition.
> > >>Version: 7.1.362 / Virus Database: 267.13.7/182 - Release Date:
> > >>11/24/05
> > >>-----------------------------------------------------------------
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> > --
> > No virus found in this outgoing message.
> > Checked by AVG Free Edition.
> > Version: 7.1.362 / Virus Database: 267.13.7/182 - Release Date:
> > 11/24/05
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