[TechAssist] Re: RCA 169 G35830WK retrace lines/red screen @ turn off
- From: tjanphyl@xxxxxxxxxxxxxxx
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 13 Oct 2005 20:03:12 -0400
I actually had a CRT arc situation with a 169 35" TV that caused Q2906
to fail several times in a row , but the CRT seemed OK.Must've been a
small arc. I realised I needed a heavier duty transistor that still
retained the electrical characteristics.I did, and it worked.The set
is still out there. I will try to locate my notes on the sub.I also
maybe have dome a flyback wrap to isolate the CRT,don't remember.
Phil
Phil Bader, Pres.
Jan Phyl TV Inc
Winter Haven, Fl
(863) 299-8821
estab. 1976
----- Original Message -----
From: Jerry <geiting@xxxxxxxxxx>
Date: Thursday, October 13, 2005 6:11 pm
Subject: [TechAssist] Re: RCA 169 G35830WK retrace lines/red screen @
turn off
> I ran across this same problem a couple of years ago on this chassis,
> instead of the normal problem of the bias regulator transistor
> q2906 being
> leaky, it turned out the OSD output from the microprocessor ic was
> causingit. By the way, if it is q2906 that's bad, be aware that
> CRT arcing can
> cause it to fail.
>
> Jerry Eiting geiting@xxxxxxxxxx
> Christian's Electronic Service
> Troy, Ohio
>
>
> ----- Original Message -----
> From: "Larry E" <videotech@xxxxxxxxxxxx>
> To: "tech-assist" <techassist@xxxxxxxxxxxxx>
> Sent: Thursday, October 13, 2005 9:48 AM
> Subject: [TechAssist] RCA 169 G35830WK retrace lines/red screen @
> turn off
>
>
> | Hi Guys, this 35" RCA has a strange problem, set comes on with
> widelyspaced retraces lines that will not
> | adjust out with the screen control, I`m hoping this is Q2906
> (which I`m
> ordering today) but the voltages on it
> | were real close so it may not be the problem, the wierd problem
> is at
> channel change or turn off the screen gets bright red, I swapped
> the blue
> and red driver transistors on the crt board with no change,
> checked tube on
> Sencore CR 70, reads ok, Any ideas ? tia, Larry E
> |
> | Larry Eastman
> | American TV & Electronics
> | Crystal River, Fl. 34428
> |
>
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