I have an old LG CRT TV from 2001. The image expands when I turn the contrast up, and shrinks when I turn it down. I'm trying to see if I can fix this. I started testing capacitors (in circuit), and I've got some weird readings for 2 of them.
The first one is 160V 100uF. When I try to measure ESR, I get a flashing -0. If I reverse polarity, I get the same -0. If I only touch the capacitor leads for a moment, I get some large values: 50, 90, even 100 ohms.
Using my multimeter to measure resistance on the 20K scale, I get values that increase up to 2.8K and stabilize there. If I reverse polarity, the readings go almost instantly to infinity.
The other capacitor is 250V 4.7uF. It gives no ESR reading. I cleaned the leads, made sure the probes are making proper contact, and I still get no reading. My ESR meter doesn't react at all when I touch the leads. Using my multimeter on the 20KOhm scale, I get values that go up to 11K. Reversing polarity, I get infinity.
Does anyone know how to explain these readings?
The first one is 160V 100uF. When I try to measure ESR, I get a flashing -0. If I reverse polarity, I get the same -0. If I only touch the capacitor leads for a moment, I get some large values: 50, 90, even 100 ohms.
Using my multimeter to measure resistance on the 20K scale, I get values that increase up to 2.8K and stabilize there. If I reverse polarity, the readings go almost instantly to infinity.
The other capacitor is 250V 4.7uF. It gives no ESR reading. I cleaned the leads, made sure the probes are making proper contact, and I still get no reading. My ESR meter doesn't react at all when I touch the leads. Using my multimeter on the 20KOhm scale, I get values that go up to 11K. Reversing polarity, I get infinity.
Does anyone know how to explain these readings?
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