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Asimov
 
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Default Sony KV-T25SZ8 TV problem

"David" bravely wrote to "All" (10 Jan 06 06:56:16)
--- on the heady topic of " Sony KV-T25SZ8 TV problem"

Da From: "David"
Da Xref: core-easynews sci.electronics.repair:354740

Da "Asimov" wrote in
Da message ...

"David" bravely wrote to "All" (09 Jan 06 09:26:11)
--- on the heady topic of " Sony KV-T25SZ8 TV problem"

Da From: "David"
Da Xref: core-easynews sci.electronics.repair:354617

Da "Asimov" wrote in
Da message ...
"David" bravely wrote to "All" (08 Jan 06 09:25:07)
--- on the heady topic of " Sony KV-T25SZ8 TV problem"

Da From: "David"
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