Quote:
Originally Posted by MarkFromCA
Hi,
Had a general question regarding replacement of electrolytic capacitors in a Sony KV-27S42 tv. I can find the important specs in the service manual but nothing about ripple current ratings. What's usually best to look for here? This is a measure of capacitor longevity, correct?
Thanks!
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No. You misunderstand.
Ripple current is the amount of continuous ripple that the capacitor is capable of handling over it's useful service life.
This is generally only important for capacitors that are used to smooth out AC in a power supply circuit, and not a huge concern for capacitors that only see little bits of AC swing, like in signaling and smoothing out little bits of mV level ripple in a DC to DC circuit.
What you want to pay attention to is the voltage rating and the capacitance. If you are replacing a cap in the power supply, then you can up the voltage rating a bit to make sure it's good. For a normal USA ~120V supply filter cap, you might go up to 200V or 250V just to be safe and make sure it lasts, but be aware that it will be more expensive.
In general, don't get caps of different capacitance unless you have a full understanding of what they do in their spot in the circuit.