Re: Sony KV-T25SZ8 TV problem
- From: "Asimov" <Asimov@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
- Date: Tue, 10 Jan 2006 17:11:02 GMT
"David" bravely wrote to "All" (10 Jan 06 06:56:16)
--- on the heady topic of "Re: Sony KV-T25SZ8 TV problem"
Da> From: "David" <privateguy@xxxxxxxxxxx>
Da> Xref: core-easynews sci.electronics.repair:354740
Da> "Asimov" <Asimov@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
Da> message news:MSGID_1=3a167=2f133.0_43c3325d@xxxxxxxxxxxxxx
>
> "David" bravely wrote to "All" (09 Jan 06 09:26:11)
> --- on the heady topic of "Re: Sony KV-T25SZ8 TV problem"
>
> Da> From: "David" <privateguy@xxxxxxxxxxx>
> Da> Xref: core-easynews sci.electronics.repair:354617
>
> Da> "Asimov" <Asimov@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in
> Da> message news:MSGID_1=3a167=2f133.0_43c1342c@xxxxxxxxxxxxxx
> > "David" bravely wrote to "All" (08 Jan 06 09:25:07)
> > --- on the heady topic of "Re: Sony KV-T25SZ8 TV problem"
> >
> > Da> From: "David" <privateguy@xxxxxxxxxxx>
> > Da> Xref: core-easynews sci.electronics.repair:354497
> >
> > Da> I finally got around to having a look at the set today. I found a
> > Da> ceramic capacitor on the AC (next to a 470 ohm resistor) side that
> > was
> > Da> open circuit.
> > Da> The capacitor is marked 103P. Am I right in assuming that it is a
> > 130
> > Da> pF ??
> >
> >
> > That cap is probably not 130pF.
> > Capacitors are normally open circuit for DC, what do you mean by this?
> >
> > The marking 103 would mean 10 with 3 zeros, so this would mean it was
> > a 10,000pF or a 0,01uF capacitor. However the letter P is a tolerance
> > of +100/-0% so the cap may measure as much as 0,02uF. Finally, its
> > thickness and diameter would give a rough approximation of its voltage
> > rating, unless it is written.
> >
> > Typically, P tolerance 0,01uF or 0,1uF ceramic caps are used for
> > bypassing and this means these would be unlikely to cause a major
> > problem if they did fail with a reduced capacitance.
>
> Da> I tested the capacitor and it measured -.598 on the 2uF range on
> Da> my meter. I'm wondering if my meter is stuffed.
>
>
> If the cap was across a diode it might be rectifying the test signal
> and resulting in a negative reading. First try unsoldering just one
> leg and then take the measurement.
>
> A*s*i*m*o*v
Da> I tested the cap out of the circuit initally. I'm wondering if my
Da> meter is on the way out.
If the cap tested open circuit on the DC ohms range then I certainly
would wonder about the capacitance range since caps don't typically
exhibit a negative value.
A*s*i*m*o*v
.
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