[HELP!] PS problem

[PsykoK]

Yesterday I built 2 Pi filters for my Zen V4 and today I run some tests to verify it.

The 2 filters are the same and use the same part list.
Is use the following parts for each filter
- 8 x 10000uF from BC ref: 051
- 1 x 4,7nF from WIMA ref: MKP10
- 1 x 2.2mH



To build these filters I use a PCB from my conception:



Something is going wrong with one of these 2 filters because I don’t get the same result with the 2.
For a better comprehension a call the first filter F1 and the second F2

On first I test the 2 filters with a transformer (350VA, 18-0-18) and a diode bridge (600v,25A)
All voltage on the bride and on the transformer are ok!

I check the output voltage with my MM a get around 53V with the 2 filters but when I use my scop, I get an full flat output sig for F1 and something like capa sig with a load/unload for F2. But the DC offset is still the same: 53V on the scop for F1 and F2.

When I check the voltage one the filter without any AC source, I get around 53v for F1 and 2V for F2. The voltage on F2 is decreasing but not for F1.

Can someone tell what is going wrong and why?

Thanks

[eLarson]

Are any of the caps (even C9) getting noticeably
warmer than the others in F2? (A bad part?)

When you say "any AC source" do you mean the
transformer, or a signal driving the circuit being
powered?

Do you have a picture of the waveform you are seeing
with F2? I'm having a hard time picturing it.

Erik

[PsykoK]

chame on me!!!
I found the problem, I mount a cap in the wrong wy on the board

eLarson , thanks for your help

[eLarson]

No problem at all. Glad to be of service.

Erik