Burnt Cap in I-INC display

[sean g]

so my I-INC is220 started showing signs of cap failure last night but this morning it really went out. pulled it apart, found the bad cap but its so burnt up i cannot tell what it was to begin with...I have dabbled in electronics repair but i am stumped on this one and could use some input from someone that knows a little more.


here is a picture of the burnt cap, with a healthy one next to it.



i want to assume that the burnt one would be the same as the one next to it (because of the similar location and packaging) is that wrong to assume?

any help is appreciated

[Krankshaft]

Re: Burnt Cap in I-INC display

That's a 3,000 volt (Kilovolt) cap filtering the output for one of the CCFLs.

I've never actually had to replace one hope someone else can explain the coding.

They usually like to use the 3 character coding scheme like they do for ceramic caps like 12J means 12pF.

[EGuevarae]

Re: Burnt Cap in I-INC display

... i want to assume that the burnt one would be the same as the one next to it (because of the similar location and packaging) is that wrong to assume? ...

It is the same.

[sean g]

Re: Burnt Cap in I-INC display

It is the same.

ok now what is it

[EGuevarae]

Re: Burnt Cap in I-INC display

ok now what is it

It's a

That's a 3,000 volt (Kilovolt) cap filtering the output for one of the CCFLs.

?
Look at http://forums.anandtech.com/showthread.php?t=234064
The question here is why it fried....

[sean g]

Re: Burnt Cap in I-INC display

It's a
?
Look at http://forums.anandtech.com/showthread.php?t=234064
The question here is why it fried....

that thread doesnt seem to have an answer for the n3 3kv sec cap. looking on digikey there are several that are 3kv but all have different heat ratings and tolerences.

[sean g]

Re: Burnt Cap in I-INC display

ah so eguevarae you were of considerable help. i got home tonight and after reading in that other thread that the output caps on the ccfl are not always an identical pair i decided to look at the other ccfl and see what caps are on its output. turns out there is a N3 3KV SEC and a 12J 3KV JNC so they are not the same but the good news is that even though that other thread did not list what the N3 3KV SEC is it does list what the 12J 3KV JNC is so now i know. just for future reference digikey part no. P9643-ND and there is no need to replace the N3.

I too am worried about why it blew but from what i've read thus far people have had success with replacing the 12J and having the monitor operate fine.

[EGuevarae]

Re: Burnt Cap in I-INC display

ah so eguevarae you were of considerable help. i got home tonight and after reading in that other thread that the output caps on the ccfl are not always an identical pair i decided to look at the other ccfl and see what caps are on its output. turns out there is a N3 3KV SEC and a 12J 3KV JNC so they are not the same but the good news is that even though that other thread did not list what the N3 3KV SEC is it does list what the 12J 3KV JNC is so now i know. just for future reference digikey part no. P9643-ND and there is no need to replace the N3.

I too am worried about why it blew but from what i've read thus far people have had success with replacing the 12J and having the monitor operate fine.

Glad to help.