[TechAssist] Re: RCA Projo PTK195MB P52921 originally dead now pix short on bottom osd rolls
- From: "Wayne Vanaman" <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Fri, 7 Nov 2003 13:35:29 -0600
Hi Larry:
The micro, u13101p25 is "FSW" fast swith sends pulses to the jungle pin33
thru two resistors, smd r13309 1K and smd r12701 100ohms. On the scope at
5mS it should look like a burst of horizontal in frames, that is a burst on
and a space, the manual doesn't say (or I don't see it) but I would guess
they are only putting OSD on one field. Anyway, that burst is only there
during OSD, and the jungle has to see 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
----- Original Message -----
From: "Larry Eastman" <videotech@xxxxxxxxxxxx>
To: "techassist" <techassist@xxxxxxxxxxxxx>
Sent: Friday, November 07, 2003 1:25 PM
Subject: [TechAssist] RCA Projo PTK195MB P52921 originally dead now pix
short on bottom osd rolls
> Hi Guys, just went out on this PTK195 with the usual bad flyback,
> replaced with OEM, set came up
> with menu rolling very fast from bottom to top, and approx. 8 inches of
> black at bottom of screen.
> Exiting the menu gets rid of rolling but if you change channel or pull
> up any osd function it again rolls,
> I have never had a problem with a 195/197 doing this and I don`t have a
> chipper checker, I`d like
> your opinions, is this just a set with 2 problems (flyback & vertical)
> or does the eeprom/micro need to be re-initialized/set-up with the cc ?
> I didn`t bring the service manual with me on the call because it appeared
> to be a straight forward flyback failure, and my service van is in the
> shop, tia, Larry E
>
> Larry Eastman
> American TV & Electronics
> Crystal River, Fl. 34428
>
>
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