SCPH-1000 with a bad PUSH-PULL?

Hi there !
I have a SCPH-1000 (serial under 6 milion) with a strange and serious problem. Let me explain :
Some games like Ridge Racer, Cybersled, F1 97 or Akumajou Dracula X (Castlevania SOTN) have some issues with audio track. So, it read the music but it start not at the beginning but in the middle or at the end !
The game i've tried are :
Ridge Racer (PAL - Good condition ) works bad with DA tracks (music start on middle and load wrong track)
CyberSled (NTSC-J / BACKUP) works really bad with DA tracks(music won't start correctly and some times the games won't start)
F1 '97 (NTSCJ / MINT Condition) works little bad with DA Tracks (music start on middle and sometimes load wrong track)
Akumajou Dracula X (NTSC-J / BACKUP) works a little bad with DA Tracks (music start correctly but on game over screen sometimes load a wrong track)
If is the PUSH-PULL, how can i regulate with out an oscilloscope?
Or somebody else have my same symptoms?
My laser is original KSM-440BAM with F.BIAS on 1.70v and F.GAIN on 1.82 (the laser is clean and mecha is performed with an excellent grease for silence and precise reading, also i lubrificate the Mabuchi motors with WD-40).
I've upload a video for demostration :

All the best guys and thank you so much !!