Well Oldskool and I is currently trying to get a SCD Model 1 up and running we've been working on this thing for 2 days now. First problem of course was the fuse so we modded that so we can insert fuses externally if it would blow again.
We fired it up and made it to the BIOS screen tray stayed closed and prompt us to open to insert disc soon as we do so that's where the problem occur we learned that pushing the actual tray to get the laser assembly to drop down is a no go.. you actually have to use the big gear to make the mechanism to work.
So after hours of adjusting the gears and making the laser assembly drop down manually with the big gear we put it back together hoping it would work like it should with no luck we ruled out that it could be the belt not pulling up the lazer drive when the disc is insert.
Now I read that some users that's familiar with repairs on these systems use O-rings the belt on the system now is pretty loose and I was going to see if an O-ring will do the job but I want to know which size will do?
I know if the ring is to tight that it will be heavy on the motor so I would need something that will fit just right.