Directed D2205 missing capacitor value

[imraneesa]

Hi all
I want the value of capacitor that is missing in the picture attached. Some tec had 47uf 450v bipolar which i feel is not correct. It pulls plenty current with this cap. Once removed amp works normal.

 

[Perry Babin]

Is the signal at the speaker terminals clean without the capacitor?

 

[imraneesa]

Is the signal at the speaker terminals clean without the capacitor?

It is not sharp clean but had some noise but not much to talk about.

 

[Perry Babin]

Is that round inductor near the cap OK? The windings look dark.

Have you tried installing something like a 10uF film cap in that location to see if the amp worked OK with it?

Did you check the cap to see if it was shorted?

 

[imraneesa]

Is that round inductor near the cap OK? The windings look dark.

Have you tried installing something like a 10uF film cap in that location to see if the amp worked OK with it?

Did you check the cap to see if it was shorted?

Ya round inductor looking good. Sorry the 47uf cap was not bipolar. It was normal electrolytic capacitor with positive and negative sides. I will try with 10uf cap but what voltage cap to use?

 

[Perry Babin]

A 100v should be OK unless the amp can drive more than 100v to the speaker terminals.

 

[imraneesa]

A 100v should be OK unless the amp can drive more than 100v to the speaker terminals.

Amp is pulling plenty current.

What strange is if I connect only one irf640 and one irf9640 then it worked normal. But when I add all the outputs it pulls current.
I added 10uf film capacitor.

 

[Perry Babin]

That sounds like the drive circuit may be weak. How many outputs does it have?

Wider, good quality photo of the entire class d section?