[madmax4]

i have a SCPH-50004 chip moded with read disc error problem.
this happened suddenly. i have tried to adjust the laser head using the pots based on some ps2 repair guides from the net. why there isn't any guide for 5000x versions? can i find one?
i don't know where to measure the laser signal on the board with an osciloscope. can anyone help on how to adjust the laser head?
any other help will be appreciated!