Sega CDX laser calibration without opening the console

[dylbob42]

Fixed my system!

Thanks to the pictures & guide here:

http://www.briconsola.com/esp/cdxxesp.htm

and the service manuals for Mega CD 2 here:
http://www.sega-16.com/forum/showthr...-manuals-16bit

I learned how to adjust the pots on the daughter board to allign the laser right. Interestingly, you shouldn't need to adjust the pot on the laser itself-- Sega made pots on the boards that (in theory) do the same thing. I haven't found the "eye pattern" point on a CDX yet but I will soon...Basically you can use an oscilloscope to get the pattern right while adjusting the "E/F, B" pot. and once you get it to boot you can fiddle with the tracking gain "T. Gain" pot.

I also took measurements of the correct pot positions if anyone is interested. Works great with the 2 Dalbani lasers I bought! Plays Silpheed flawless...which is the most demanding on the system of any game I think

-Segasonicfan

hi, thank the google i found you!

i just spent my weekend trying to calibrate a cdx to a new laser and it been hell. I tried using a multimeter reference but that didn't work, been doing it by hand ,trial and error. adjust the pot, put cd on, turn on, turn off, take the cd off, adjust pot, put cd on, turn on....over and over. Got it from not reading to playing but not being able to load the next level (golden axe on the classics cd) to being able to load the next level. last issues are that the soundtrack wont play consistently and when i upscale the component signal there seems to be interference between the blue and green.

so in frustration i have decided that its time i got a oscilloscope, can i please get the measurements of the correct pot positions off you? Also do you have and advice on what to look for in a hobbyists oscilloscope?

cheers!