OBERHEIM SYNTH

HI
thanx for helping me

here is what I found TODAY

my DMX is OK ..PROBLEM IS ON SOUNDCARD 100 % 
I tried some A-B tests and here is what I found

I took bouth PERC 1 and PERC 2 sound cards and tersted
them 

Eproms are OK!!
TL 084 are OK
6072 ARE OK!!!!


problem is in some of this ICS...

TC 4040, TV 4013, TC 4001, TC4011 or NE555

this are not too expensive parts only few $$ and they
are available HERE

@Charles...Did you ever dealed wit repair of this
machine couse only part wich is not original is 4011
..that was changed some time ago..I can see couse
soldering is different than rest of cards solders..!!!

I suspect that 4011 U2 or U4 can be PROBLEM!!!

any idaea  ???

I will buy ICS maybe tomorrow and try!!!!

I will keep you updated!

Damir


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