[TechAssist] Re: Proscan M# PS52682 PTK171ACB, Wierd Chroma problem-FIXED
- From: "John @ Myers TV " <myers_tv_b@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Fri, 04 Nov 2005 06:17:48 -0500
John,
You're right! I'm getting dyslexic. It should be CR3605.
It s a 9.1V, .4W Zener.
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 Conti wrote:
> 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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