So, this week was hard for me. After 100 times checked pins and traces I decided to build new OPL pcb (cannibalized another sound cards). Result is that is not working too. First what i got from the second board was very low and crunchy audio signal but from all four channels, then I changed whole core board which i had prepared for sequencer and to my surprise it worked well but without audio on first channel. What i observed was that OP1 has no function as before the OP3 and OP4 when i had no audio on channels 3 and 4 (they worked now). So i think that must be there something between No of OP and No of Channel...
YES I am trying not to heat them up too much, my solder station is set to 250`C and heating pin last about one second.
In next days i will try that improved layout for OPL and also try to improve my soldering skills. No drunken monkey anymore!