Options:
 
"Sony" PS2 KHS-400C 
 
SF-HD7 Model - Replacment for KHS-400R
This is a Sanyo replacement
 
 
This is for SCPH-500X models.
 
Please remember to remove the anti static solder point from the base of the laser.
 
Install Notes
 
There is a good install video here. (not connected with oldskoolconsoles.com)
 
PMAP Github 
https://github.com/ps2homebrew/PMAP PMAP 
 
Test build and GUI version https://github.com/AKuHAK/PMAP/action...
 
UART interface , usb to serial adapter
 
test points:
https://www.psdevwiki.com/ps2/Test_points/MechaCon_UART#GH-023
 
test guide
https://www.reddit.com/r/consolerepair/comments/1237a1j/revive_a_fat_ps2_using_pmap_to_calibrate_the_laser/