cap question on a mq 430

[wooferdog]

i'm changing the caps on this amp and i see the 4 power supply caps,the 2 rail caps and two more caps next to the rail caps that are 35 volt,do these need changed and what are they for?

[ttocs]

I have them ready to be soldered into my board, just have not done it yet.

[wooferdog]

what are those 2 caps for? they have a higher voltage then the rail caps.

[Mr. Wild]

What caps do you mean?

[wooferdog]

it's the ones with the red and white stickers on them by the rail caps. they are both 470uF 35 volt. board is rev b

[Eric D]

What you have there is a pretty rare (I know I have never seen one) MQ430 with double rail caps. All MS250s are built this way.

You need to replace those as well. The big blue caps can stay.

PG seemed to use smaller caps in this configuration most likely for speed. The little caps react quicker, but the bigger caps hold more energy.

[ttocs]

really? Mine is like that as well.

[Nils]

Hmmm... Both of mine MQ's also have them. I have one gray and one white.

[pdelgadinho]

Since a bunch of you guys are taking a closer look at your MQ430's, can you let me know the following so I can update the cap replacement spreadsheet I'm working on? Looking for the factory specs, please fill in the question marks or correct any mistakes.

Thanks in advance!!

MQ430
4 Input caps = 16V, 2200uf, 105C, 18mm x 31.5mm, 7.5mm Lead Spacing
2 Rail Caps (the big ones) = ??V, ??uf, 105C, 35mm x 35mm, ?? Lead Spacing
2 Rail Caps (the small ones) = 35V, 470uf, 105C, ??mm x ??mm, ?? Lead Spacing