[TechAssist] Re: RCA P60920BL PTK195KC vert. problems FIX
- From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Mon, 25 Apr 2005 15:04:04 -0500
Hi Larry:
That is interesting. I saw a 195 chassis P46922 2000 year model last
week were that diode was bad. On mine the vertical was about 1/2 what
it should be, so a quick check revealed the voltage disparity and diode
problem.
Maybe these will begin to be another nice quick and easy fix. I used a
1n4007 diode.
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
Larry E wrote:
> Robert, thanks for your reply those caps all checked good, Fix for this unit
> was CR14501 across pins 2 & 6 of vert. IC. This diode checked good on
> a diode tester!!!!! Must break down under a full load, sooooo replace
> instead of checking this diode if the bottom 1/2 of the screen is all black
> and
> the top is nothing but lines, Larry E
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl. 34428
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: <techassist@xxxxxxxxxxxxx>
> Sent: Wednesday, April 20, 2005 4:39 PM
> Subject: [TechAssist] RCA P60920BL PTK195KC vert. problems
>
>
>
>>Hi Guys, working on a RCA P60920BL 195 chassis with what looked like a
>
> converg.
>
>>problem initially, 3 bowed lines in the center of the screen, top half
>
> looks like it has
>
>>severe foldover or loss of sync (without the rolling, hard to describe)
>
> bottom half of
>
>>the picture is black, audio is also missing, found no output voltages
>
> on the little aux board, replaced the board and got all voltages back but
> the symptom is exactly the same, checked the vertical IC and voltages were
> all low except pin 2, unsoldered
>
>>pins 1 & 7 and voltages came back up except pin 6 it was 8.9v now with
>
> pins 1 & 7
>
>>unsoldered it`s 12.5 volts, I have never seen this symptom on a 195
>
> chassis before
>
>> obviously U14501 is bad but is there anything else that you guys have
>
> seen? I
>
>>can`t figure out why I don`t have any audio with a blown vertical IC, any
>
> help is
>
>>greatly appreciated, Larry E
>>Larry Eastman
>>American TV & Electronics
>>Crystal River, Fl. 34428
>>
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