[TechAssist] Re: fix: RCA Proscan PS35123, CTC169EJ5 slight videosmear to right?]]
- From: Doug Keller <dek@xxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Tue, 17 Feb 2004 13:16:41 -0500
Almost as bad as unplugging all the connections from the board,
disconnecting high voltage, getting everything ready to pull the board
out, then discovering that you never unplugged it from the wall!! *laughs*
Doug Keller
Wis-Kel Electronics
101 Freeland Ave.
Terra Alta, WV
USA 26764
dek@xxxxxxxxxxxxxx
http://www.tech-assist.org
"Learn from the mistakes of others, because you
won't live long enough to make them all yourself"
Phil Bader wrote:
>Well, I really wrestled with my pride on posting this one message.
>Here it goes.
>Yesterday while troubleshooting this set, between my back ache and the
>never
>ending phone calls and walk ins (I'm alone),
>When I carefully unsoldered the defective thermal video switch IC, U1401
>(161079/HCF4052B/NTE4052B), set it aside, opened the new part bag,
>answered the
>phone.... returned, and RE-INSTALLED the defective IC right back into
>the set.
>I kept cooling this "new" IC and the smear would clear. Finally I found
>the replacement
>next to the set still in the foam,clean pins and all.
>Gad, I feel stupid.
>Well thanks, group, for all the help offered.
>The fix for the smear was a thermal IC U1401 video switch.
>Very Stupidly Yours,
>Phil
>
>
>
>>Philip Bader
>>Jan Phyl TV Inc. (estab. 1976)
>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>Fax (863) 299-8821
>>email: tjanphyl@xxxxxxxxxxxxxxx
>>
>>
>
>
>Phil Bader wrote:
>
>
>
>>I did check out that site.. Ziltch..
>>It was suggested a bad CRT, 200 volt scan-derived electrolytic cap to crt
>>board weak,etc.
>>This cannot be the case, as I get good picture with no smear in line-in
>>video mode both with the RCA inputs and S-video. Those parts would be common
>>to all video and tuner inputs.
>>I have since changed the integrated tuner assy, the video switch IC U1401
>>(HCF4052B) and all 'lytics surrounding that IC. If I freeze spray around
>>that IC, it clears! (And I've changed it with a new one.) and chemically
>>cleaned the board)
>>So it cannot be anything that shares the same circuitry as the RCA and
>>S-video does, because they're OK.
>>Only with tuner input... And as it stays on 10 minutes and more, it gets
>>worse. I also notice the contrast is not as good in tuner mode either. That
>>seems to go hand in hand with this smear thing.
>>I'm stumped.
>>Hey, RCA experts!
>>Help!.
>>
>>
>>Glen Rhea wrote:
>>
>>
>>
>>>Phil
>>>You should check the history files re: ctc169 at www.wa6ati.com
>>>Glen
>>>
>>>Phil Bader <tjanphyl@xxxxxxxxxxxxxxx> wrote:
>>>After restoring the vertical (prev. post) I notice a good picture but
>>>there is definately a video smear to the right of everything, more
>>>noticable with text, of course. I lowered the sharpness and almost gone.
>>>
>>>Any histories on video smear with the CTC169's?
>>>Phil Bader
>>>
>>>--
>>>
>>>Philip Bader
>>>Jan Phyl TV Inc. (estab. 1976)
>>>3420 Recker Hwy. Winter Haven, Fl. 33880
>>>Fax (863) 299-8821
>>>email: tjanphyl@xxxxxxxxxxxxxxx
>>>
>>>--------
>>>
>>>
>
>--
>
>
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