hi
i see that in one of the big stores in my town there are 23 types values of 400V CE and only 2 types of values 450V - 47uf and 150uf

150uf variant doest cost 2.5 Euro. If i must and want to replace all the ce on the two boards of monitor X and replace for example 2 or 4 CCFLS and one transistor the services goes not very cheap. A 17 Inch LCD monitor in pawnshop does cost 20 Euro.

Enough off topic information. Can i just replace 450V with 400V in LCD monitors ?

Thanks in advance

 

No. Use the same or higher rating.

 

You can if the PSU does not have a PFC.

 

So...for the begining - i have these LCDs here:
boards :
715G1899-1-GP (sony 17 inches)
ILPI-107 Rev:C 2008.10.16 this is more important to me and in truth urgent

Do they have PFC?

And of course follows the next question - how to define if it has PFC. About PFC i have heard for active and passive and that`s that.

Thanks in advance

 

Show me a picture of the PSU from both sides.
Clear pictures.

 

https://drive.google.com/open?id=0Bxome1ZSCRIaOFQzeXl1clBzS1E

thanks

 

No PFC on both the PSU you showed hence the cap voltage will be approx. 300VDC
A 400V Cap will suffice.

 

Want to use the thread for asking something more - again for entry capacitor.

Because it was 150uf/450v /which is rarely used i think/ i have purchased new 150uf from AliXpress.
The problem is that they were far from that 150uf - 114uf. Yesterday have buyd 2 * 100uf/450v from my city.
The question is how to mount them to pass into whole situation and will this remake be stable?

Original 150uf/450v is already trashed i think

i atach the pdf of the monitor. If i have to i will make photos of what you say

Thanks in advance

 

150uf cap can have 20% tolerance.
120uf should be minimum reading.
114uf reading is a bad cap.
Did you discharge the cap before measuring ?

 

Always discharge them before measuring.
Just china guys do it that way.
Fortunately found the old capacitor and now am waiting for the solder iron to heat
The old one is 136u

 

It's not why because china does it, it's because you do not wanna blow up the meter, or any residual voltage messing up the reading