[TechAssist] Re: Sylvania-RSJ450-Ch#PTV325-high voltage comes up then shuts right down
- From: joel e sanford <jo-rope@xxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 28 Oct 2004 20:48:07 -0500
Richard! I just had one of those older sets that was doing the same thing
I replaced the regulator Q11 on the Power supply board.... It Is A
darlington transistor, also check the deflection board these tips are in
thew secured section......
On Thu, 28 Oct 2004 18:05:46 -0700 (PDT) Richard La Placa
<continentaltv@xxxxxxxxx> writes:
> Hello all,
> This set starts to come on then shuts right down. The only thing I
> can detect is the high voltage coming up then shuts down. I
> disconnected the wire from the hv transformer to the splitter just
> to see if it was similar to the ctc 169 RCA sets with the shorted
> splitters and still nothing. I measured the voltage at the vert
> output transistors and it starts to come up , then right down. There
> are 2 boards at the top . The deflection board has 00705444 printed
> on it and the powersupply/highvoltage panel is a APW010SER8.Is there
> any easy way to find out which of these boards is the culpret? There
> are no shorted output transistors on either board.This thing is in
> somebody's basement or I would drag it to my shop but this is not
> going to happen-just too heavy.I tried turning RP1 a little both
> ways just to see if the shutdown circuit was critical, but still
> same.Seems odd you can push power button remote again and same
> thing. In other words, you don't have to turn it off first like a
> regular
> shut down, then on again. Any help greatly appreciated.
>
> Richard La Placa
> Continental TV
> 312 a Park Row
> Chestertown, Md, 21620
> http://www.continentaltv.homestead.com
> 410-778-1113 (voice & fax)
>
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