[TechAssist] Re: Proscan M# PS52682 PTK171ACB, Wierd Chroma problem-FIXED
- From: "John Conti" <contitv@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 03 Nov 2005 21:36:05 -0600
John , Thanks for the feeback on this one but I could not find a part # for
cr 3065 on parts finder.
Do you know the number or what type of diode it is.
Thanks
John
Conti,sTV
Texas
>From: "John @ Myers TV " <myers_tv_b@xxxxxxxxxxxxx>
>Reply-To: techassist@xxxxxxxxxxxxx
>To: techassist@xxxxxxxxxxxxx
>Subject: [TechAssist] Proscan M# PS52682 PTK171ACB, Wierd Chroma
>problem-FIXED
>Date: Thu, 03 Nov 2005 21:18:52 -0500
>
>OK, here we go.
>
>Symptom: This plays for a minute or two, then an interference pattern
>creeps accross the red & blue CRT's, and they go dark. As they go dark,
>the green CRT gets very bright (no retrace lines).
>
>If I leave it go, then the blue & green go dim, and the red gets bright.
>
>freezing U2001 cures it for a while.
>
>CURE: the 9V Y/V/C VCC is running 11V. The cure was to replace CR3065,
>in the base circuit of the 9V regulator. This diode is behind a heat
>sink, ad covered with hot glue; a real chore to get to.
>
>I'm real glad to be finally sending this dog home!
>
>
>John Myers
>Myers TV Service Co.
>2212 W. State St.
>Alliance, OH 44601
>
>Voice / Fax: 330-821-6545
>Myers_tv_b@xxxxxxxxxxxxx
>http://www.myerstv.net
>
>"[Luke:] I can?t believe it.
>
>[Yoda:] That is why you fail."
>
>
>John @ Myers TV wrote:
> > I'll be careful. :-)
> >
> > John Myers
> > Myers TV Service Co.
> > 2212 W. State St.
> > Alliance, OH 44601
> >
> > Voice / Fax: 330-821-6545
> > Myers_tv_b@xxxxxxxxxxxxx
> > http://www.myerstv.net
> >
> > "[Luke:] I can?t believe it.
> >
> > [Yoda:] That is why you fail."
> >
> >
> > Wayne Vanaman wrote:
> >
> >>Well, the dog is likely to bite you when you try to spank it.
> >>
> >>Wayne Vanaman
> >>Omega Electronics
> >>6904 W Fairfield Dr
> >>Pensacola, Fl. 32506-3310
> >>
> >>Wayne@xxxxxxxxxxxxxxxxxxxxx
> >>WWW.PensacolaTVRepair.Com
> >>
> >>850-456-5995 voice
> >>850-458-6369 fax
> >>
> >>
> >>John @ Myers TV wrote:
> >>
> >>
> >>>OK, I ordered the jungle chip for this dog, but it didn't help. Still,
> >>>when I freeze the chip, everything returns to normal.
> >>>This morning, I wound up at the shop at 6AM, thanks to the time change.
> >>>I did some thinking, and thought to check the B+ to the chip.
> >>>The 9V to the Y/C/V VCC input is running 11.1V!
> >>>I'm going to change the Zener in the 9V regulator circuit Monday night,
> >>>and will report back on my progress.
> >>>Boy, will I be glad to spank this dog in the butt & send it home!
> >>>
> >>>
> >>>John Myers
> >>>Myers TV Service Co.
> >>>2212 W. State St.
> >>>Alliance, OH 44601
> >>>
> >>>Voice / Fax: 330-821-6545
> >>>Myers_tv_b@xxxxxxxxxxxxx
> >>>http://www.myerstv.net
> >>>
> >>>"[Luke:] I can?t believe it.
> >>>
> >>>[Yoda:] That is why you fail."
> >>>
> >>>
> >>>John Myers wrote:
> >>>
> >>>
> >>>
> >>>>HI,
> >>>>
> >>>>This has been here for a couple months. It plays for a minute or two,
>then an interference pattern creeps accross the red & blue CRT's, and they
>go dark. As they go dark, the green CRT gets very bright (no retrace
>lines).
> >>>>I've been able to track it back as far as the r-y, and b-y lines
>coming from the Progressive Scan IC, U2401. In the morning, I hope to check
>voltages on U2401. But, I'm hoping to not have to replace the IC as a test.
>The dealer cost is $60!
> >>>>Has anyone heard of anything like this on the CTC170/171 family of
>chassis?
> >>>>
> >>>>Thanks,
> >>>>
> >>>>John Myers
> >>>>Myers TV Service
> >>>>376 E. State St.
> >>>>Alliance, OH 44601
> >>>>PH 330-821-6545
> >>>>e-mail: myers_tv_b@xxxxxxxxxxxxx
> >>>>http://www.myerstv.net
> >>>>
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