Capacitor help

[garyi]

I dread to think of the amount of things I threw out that were probably £1 capacitors.

 

[davidsrsb]

The OP was lucky to have caught this in time. Many LCD TV failing power supply capacitors take out the switching mosfet and then blow other boards in the process.

 

[colasblue]

These things seem to be designed to last around 10 years and then spontaneously self destruct.

My big TV had a PS caps failure a year or so back which just happened to coincide with the Maplins stock sell off.

I replaced all the smaller caps on the PS board (about 10 in all, assorted values) for the princely sum of £1.05!

Winner I thought, but same TV has now developed a line of dodgy pixels on the far right which start working once it's warmed up a bit.

Little chance of fixing that I suspect.

 

[glenn jarrett]

I have fixed a few tv power supply boards before and it seems that its common to find 10v rated caps sitting on a 10v rail !
is this what they call a built in wear factor

 

[MJS]

Nah, the original Naim XPS has 40v caps on a 40.5V rail. They start rattling after a while.

 

[Arkless Electronics]

Nah, the original Naim XPS has 40v caps on a 40.5V rail. They start rattling after a while.

That's now't! MF B200 had about 70V on 63V caps!