The deeper cause of the problem lying in the capacitor in the power rail that going to the laser pick up. It losing value thus losing the available power it can supply, that is why you can get it worked again by increasing the power to compensate it (reduce resistance by turning the Pot anti-clockwise). When the cap lost more value than the range of the Auto power Pot can compensate then it will not work, and it will because the capacitor is dying anyway. Trace the ribbon cable back to the mainboard and find any capacitor next to the connector, replace it...most of the time it will work without touching any adjustable potiometers on the laser assembly, which may be a dangerous thing.
Thanks! Even if told that no adjustement should be done without proper readings, i turned just a little bit (5 degrees?...counterclockwise) one of the screws i a 90's cd player and is working perfectly. Hope it lasts and don't get fried. Removing stuff to get the readings in my case was a hell of a hassle so i took my chances. Thank you very much for this video!
You are great ! Needed exact information on which potentiometer to adjust on my sony FH-B170 which reading the CD then suddenly stop and giving NO DISC error. Gonna try tomorrow.
@@diymariuselectro Hello, this method worked for my system. No skip and no errors now and switching between tracks flawlessly. I don't know how long it will work but at least its working for now. Thank you very much !
Good video! Thanks! I have some minidisc players with no working the pickup, im already try all but never works, the laser are ok, im already adjusting to ideal gain etc but nothing, the pickup trying to read the disc several time but cant read, i thik the problem is about some alignment but how i can put the right alignment in that lens?
Hello, in my case laser is moving up and down but disc does not rotate i check motors externally and they are working fine. What could be the problem.I appreciate your reply.
@@diymariuselectro I will try with replacing the laser. I tried by adjusting as you showed in video but no result. I can see the red laser light but very dim.
Hello Thank you for the great and clear explanation. I did exactly what you showed in de video. However I still have one problem now, the cd still skips half way there song. Do you have any idea what I might be doing wrong?
Hey man! I have an old Akai sampler with this mechanizm (Akai CD3000 non xl). Unfortunately i moved all the knobs on the lens module. I have an osciloscope but i don't know where to plug it to calibrate the lens. Any advice? Thanks in advance!
when I made this video I found on google a complete article describing how to adjust all the knobs with the osciloscope.pls search it and if u not find I will search for u.
Great video! Just can you tell me the width of the ribbon connector (the one who's going, by left side, outside the optical drive). I think by "width" the number of traces. There is lot of mechanism with KSS-240A and they have different control PCB (with smaller or larger ribbon). It's for fixing a SEGA mega CD. thank!
I just replaced the KSS240 to a new unit on my Arcam CD player but now I get some repetitive noise with every spin on te CD especially on the last few tracks( away from the centre ). What do I need to adjust please?
greetings friend, to avoid the jumps in the song (the cds are original and are not very used) which of the three screws should I adjust? I already cleaned the optical lens but there are three screws I don't know which one to move. I hope you can help me thank you very much
hello, in my case, the lens goes up and moves but the disk does not rotate, I don't know if it's the motors or I also have to adjust a screw, I would appreciate the help
@@diymariuselectro In this case, would it be to adjust the one on the right, the one in the middle or the one on the left? I also have the KSS-240A on my sony LBT D550
Hi, I have the same CD player model, and it suffer from CD tray drawer wen closed, the laser mechanism don't move up... Plz could desassamble your CD drawer and explain how the mechanism should work properly so I can compare if the issue is because of belt or the wheel?
@@diymariuselectro normally when you buy replacement laser lens optical pickup there is a anti static solder point on the lens circuit board which needs to be desoldered before installing and this was done because of potential short circuit or damaging the laser when transporting.
Great video thank you ! Optic module replacement is only needed for no error disc ? Because I bought a CD player which is crackling. Do you have any recommandation for an oscilloscope ?
Well, I've just did repair my CD player based on KSS-240a by turning up the power on laser. But found an youtube video which explains what to do more - cleaning - and then it runs on normal values. I'm going to test this: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-7LdyMof-eHc.html
