Junkyard WPC95 Audio ROM and possible problem with audio right channel

[arakissun]

I have one sticker that found at the backbox:

S2 Music IC/SPCH v.1.0

Can you tell me on which IC on Audio/Visual board must have be?
Also is there stickers for the other ICs,especially for the audio?

 

[arakissun]

I found where it must be,but see what problem I think I have.

I had many pinballs and still have WPC machines but no one of them the left speaker is much louder than the right one.
I mean when machine star and the "bong" is ok-right speaker is enough loud with the left one.
But when you begin to play it's like you play with only left speaker like only left channel.The right one I can hear when I close very much to it, it's too silent.Already tried with other speaker but no change.

Can this be somwhat from the version of this IC?
All my other WPC are fine,but they are not WPC95.If there is difference between the versions.

 

[arakissun]

Some research tell that must be caps on Audio board.
Are these both big 10 000mF/35V?
Or the axial 0.1mF/50V?
Or all of them?

 

[arakissun]

After replaced both big 10 000mF/35V with new one there is big improve with the right speaker.I think now it work like should be.May be a little but really little lower than the left one.Or I just imagine.

 

[arakissun]

Compared with my other machines.It sound the same way.