OBERHEIM SYNTH

HI,
I have a matrix 1000 with firmware 1.16, black version!

Everything was fine until I decided to service my Matrix 1000 and now some patches don't play! (for example patch 610)

I did the reset procedure... not solved the problem.

The problem appeared after I've installed a new battery socket with a new battery and 3 new filtering caps. (The 3 big ones : 6800 mf and 2 4700mf). I've checked carefully and I did the job well, no mistakes...

I 've tried to change also four 10mf cap c26 c801 c804 c812 without any effect.

I've checked the voltages on pin tp1...tp9 and I have +12 -12 +5 -5v .

On tp2 there is approx 4.2v and not +5M (what means +5M?)

I have 0v on tp9 dac adjusting vr701

I don't think that the 6 cem3396 are faulty... but?

I did several reset, nothing help!

I check with M1000x editor and I found that there is no sound (DCO) when I select "pulse" width but "Wave" work well.

The 2 DCO work perfectly with "wave" "noise" and "click" but when "pulse" is selected there is nothing!

"Pulse" work only when width cursor is totally down on m1000x editor. If I move the width cursor sound disappear.

Oviously the PWM is the problem.

I don't know what to do now....

What could I check and how?

thanks for helping