[TechAssist] Re: CTC167r High B+ 154-158v
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Wed, 17 Sep 2003 00:43:20 -0400
Warren, did you test the zener with a ohm meter or did you connect it to
a DC power supply through a series resistor and measure what voltage it
"zenes" (regulates) at? The DC power supply test should tell you that
it is ok, especially if you put a bit of a load on the cathode of the
zener.
Gary McCartney
McCartney Electronics
Guelph Ontario Canada
Est. 1984
email: gary (at) number63.ca
"Warren C." wrote:
>
> Ed
>
> I tested the zenner diode and it tested ok. Can these test good but at the
> same
> time be bad??
> Also had time today to test SCR ok too.
> Any further hints guys?
>
> Warren C
>
> Teltek3 wrote:
>
> > Warren;
> > Try replacing CR4160...(176746) 5.6 volt zener Sub can be ECG/NTE 5011A.
> >
> > -Ed-
> > Ed Gaidies
> > Tel-Tek Electronics
> > Ontario-Canada
> > teltek3@xxxxxxxxxxxx
> > ----- Original Message -----
> > From: "Warren C." <warrenca@xxxxxxxxx>
> > To: "techassist" <techassist@xxxxxxxxxxxxx>
> > Sent: Tuesday, September 16, 2003 12:30 AM
> > Subject: [TechAssist] CTC167r High B+ 154-158v
> >
> > > Hi All
> > >
> > > This CTC 167R came into my shop dead. Customer said that the set would
> > > shut off all by itself
> > > then they would have to wait to get the set on again. Then the set went
> > > to off, period.
> > >
> > > We found the fuse and the Hot bad. Fixed that but tv still turns off
> > > after a few mins.
> > > Tested the B+ standby found it to be about 153. V . When set turns off
> > > now you must unplug the set for a
> > > few mins to get it on again. Today I tested B+ and found almost 158V.
> > > Way too high I think.
> > >
> > > Does anyone have experience with this prob?
> > >
> > > We have tested many parts near SCR so far no bad ones.
> > >
> > > The (do not adjust B+) pot is supposed to be 20K and ours reads 18.?K
> > > Is that enough
> > > to throw it off??
> > >
> > > Any Ideas All welcome.
> > >
> > > TIA
> > >
> > > Warren Campbell
> > > Campbell's TV & Appliances
> > > Cannington Ont
> > >
> > >
> > >
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