On the TV board, the original 0.01, 1600V cap is on top, can it be replaced with the bottom 0.01 2kv one? (same capacitance and voltage but the old one is too big )?.

Simply what I want to know is, if the capacitance and voltage are same can a Mylar capacitor be replace with a Ceramic capacitor ? If it's not possible ...WHY ?

The original 1600V cap is on top, can it be replaced with the bottom 2kv one? (same capacitance but the old one is too big )

 

There is a reason for using plastic film dielectrics: temperature stability, voltage coefficient, dielectric absorption, initial tolerance, ESR, self resonance, ripple rating, self healing and others.
Without actually analyzing and testing, no one can tell you with absolute certainty whether it will work or not.

Question: how did you determine that the original capacitor was defective?

 

View attachment 365047

On the TV board, the original 0.01, 1600V cap is on top, can it be replaced with the bottom 0.01 2kv one? (same capacitance and voltage but the old one is too big )?.

Simply what I want to know is, if the capacitance and voltage are same can a Mylar capacitor be replace with a Ceramic capacitor ? If it's not possible ...WHY ?

The original 1600V cap is on top, can it be replaced with the bottom 2kv one? (same capacitance but the old one is too big )

There are lots of characteristics that a capacitor (or any device) has beyond the basic, first-order headline parameters.

For some applications, differences in these other characteristics matter, and for others those differences are critical to achieving proper function. This is not a job-level view, either. In a given circuit, one capacitor might really need to be one type while the one next to it might not matter at all. It's the role that they play in that particular spot in that particular circuit that determines what is and what isn't important.

Mylar capacitors tend to have more stable capacitance over both time and operating conditions and they generally exhibit better linearity, making them far better than ceramics for analog signal processing and timing applications. Ceramics on the other hand allow for higher capacitance for the same size (as you are noticing) and are cheaper. They also are better suited for higher frequency applications such as power decoupling.

But one thing about your post is confusing. How can the ORIGINAL capacitor on this TV board be too big? Since it's the capacitor that WAS there from the beginning, how can it now be too big?

 

I suspect that the TS mother’s tongue is not English, and therefore he phrased his statement incorrectly. Instead of saying “the old one is too large”, he may have wanted to say “the old one is larger”.

But he hasn’t even answered my original question yet, so perhaps we won’t have an answer to yours either.

 

Simply what I want to know is, if the capacitance and voltage are same can a Mylar capacitor be replace with a Ceramic capacitor ? If it's not possible ...WHY ?

In general, no.

Mylar capacitors are larger and more expensive than ceramic caps, so they're generally not used when a ceramic cap will suffice. A key advantage to mylar caps is stability with temperature.

 

Since we have no hint as to what the function of that capacitor actually is, tghe answer I would give is "It depends on the part of the circuit it is in." Given the voltage rating of 1600 volts, it is probably not in a small-signal part of the set. AND, given the part of the world, the mylar cap may have been the only type available as a replacement.
IF we saw the circuit then an accurate evaluation could be made. But we don't so we can't.
My GUESS is that it is in the deflection circuit of the TV and that it physiaclly does not fit. So give it a try. If it is in a critical timing part it will be immediatelyobvious. If not, it will work quite well.