[TechAssist] Re: RCA PTK195M2T tube isolation
- From: "markbrock" <markbrock@xxxxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Wed, 20 Apr 2005 08:09:39 -0500
Jim: I swapped the CRT board when it came in the first time, still the
same, I did the shock treatment, ( didn't mention it because I got reamed
the last time I mentioned it on Sony's !!) and it worked for several
weeks, came back and he told me to keep it when I mentioned the price of a
new tube.. so I'm bettin on the HK short. but never did one on a ptv,
and not sure... but sounds like no one here has done it either, I'll keep
you informed but since I own it,,, I may push it aside and hope for a good
deal on a new one. hate to sell one thats half assed.
Brock Electronics
R.R.4 box 237
5208 cr.3385
Independence Ks. 67301
620-331-0235
fax 331-7191
markbrock@xxxxxxxxxxxxx
Zenith*Philips*Peavey*Fender*Crate
we work on all brands,makes,models
of anything that plugs in the wall
----- Original Message -----
From: "becyn" <becyn@xxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, April 19, 2005 10:37 AM
Subject: [TechAssist] Re: RCA PTK195M2T tube isolation
> HUH?????
> First be sure what the problem might be.
> make sure the 200v is present on the neck PCB ,
> the K (cathode) load resistor is good and the drive
> tranisitor isn't shorted or being driven into satuation
> by some other problem.
>
>
> If none of the above, you probably have a cathode to
> heater short which will drag the cathode bias way down
> thus driving the crt into saturation.
>
> You can then:
> a ) try isolating the the heater ( i never tried this on a PTV )
> b) try "zapping" the short ( possible further damage)
> c) replace crt
>
> Jim McVey
> McVey Alltronix
> 327 Broadway
> Newburgh N.Y. 12550
>
> "If it doesn't play...
> CALL MCVEY !!!!!!"
> Factory authorized
> service for over 20
> major brands.
> 845 561 8383
> (Last of the Mohegans)
>
>
> markbrock wrote:
>
> >any one isolated the screen or what ever on these tubes ? this one has
> >bright blue with retrace, real nice picture when they brought it in,
> >played for couple days, now all blue, need a salvage gun or advise on
how
> >to isolate the short model is P61927
> >thanks for all help and advise
> >brock
> >
> >Brock Electronics
> >R.R.4 box 237
> >5208 cr.3385
> >Independence Ks. 67301
> >620-331-0235
> >fax 331-7191
> >
> >markbrock@xxxxxxxxxxxxx
> >Zenith*Philips*Peavey*Fender*Crate
> >we work on all brands,makes,models
> >of anything that plugs in the wall
> >
>
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