Sega Cd tray problem PT 2

[Thunderblaze16]

This is the first video I ever made on me (mostly cause I just found out this sony camera has video option to! lol)

Anyways just listen to my problem on the sega CD MODEL 1, I refuse to play pier solar's cd on the model 2 till I get this one to work.

(PLEASE EXCUSE MY ACCENT)

[omp]

Looks weird to me like the gears aren't even there, you are moving the tray far to easily. The tray and laser bed should be moving together. Been a while since I have seen a MCD but there should a pin that guides itself along the bottom side of the tray, this moves the laser bed up.

[Yfrid]

that's happened to mine too, it's a mess to explain by words, especially for me, since i'm not english... if i remember right, there's a specific gear in the tray's mechanics wich is not a full toothed cicle, but there's a blank part on it, if the tray is forced to open/close by hands for example, this gear happens to slide in the wrong position, so while spinning it surpasses the toothed part of his circumference, as result there's an interruption in mechanincs, that's why it's loose and you can pull it in/out by hands. the optical part raises under the CD thanks to the tray's mechanincs, in you case, the mechanincs are stuck in Open position

[16bit Bandit]

Try sliding the tray all the way out (without removing it from the unit) then rotate the black gear clockwise by hand until it doesn't turn any further. That is the one that does not have teeth on the entire gear. It is normal for the tray to be loose when things are not aligned properly.

edit, just to elaborate a bit further once you turn the gear clockwise it should align the teeth on the gear with the teeth on the tray. Now when it goes back into the system it should pick the laser assembly up so that it can read discs

[Thunderblaze16]

I'm about to throw this thing to the wall, I did said Bandit but it didn't work





other than the fuse, the internet has almost nothing else to say about the model 1 CD

[SpaceFlea]

So then when you push in the tray does the black gear in front turn? If so, then that part is fine and is not the issue.

Once you push the tray in all the way turn the big white gear by hand. It should only be able to turn in one direction (i don't recall which). That gear is what raises and lowers the laser assembly. The thing doesn't just raise and lower on its own. If spinning the white gear works, then it probably isn't the mechanics.

When the system opens and closes it first drops the laser using the white gear then opens the tray with the black gear. So the same must be done in reverse when it closes to be operational. So just pushing the tray back and forth won't do anything with the laser.

[Thunderblaze16]

So then when you push in the tray does the black gear in front turn? If so, then that part is fine and is not the issue.

Once you push the tray in all the way turn the big white gear by hand. It should only be able to turn in one direction (i don't recall which). That gear is what raises and lowers the laser assembly. The thing doesn't just raise and lower on its own. If spinning the white gear works, then it probably isn't the mechanics.

When the system opens and closes it first drops the laser using the white gear then opens the tray with the black gear. So the same must be done in reverse when it closes to be operational. So just pushing the tray back and forth won't do anything with the laser.

both black wheel and near white wheel spin just fine, but the lens is still down and won't go up

[SpaceFlea]

Interesting... that white gear shouldn't be able to move at all without either moving the laser up or down. If I recall correctly, that white gear is what the system spins which in turn spins that little black gear with which it's in contact and is what lifts and drops the laser. If you can spin that white gear freely, then something more severe might be broken. That means either the white gear isn't turning the little black one somehow, or the mechanism the black one uses to move the laser is amiss. That's about the extent of my knowledge on this.

Perhaps another video of you turning the white gear with the tray closed... :P If only we had live group video chat...

[Thunderblaze16]

Interesting... that white gear shouldn't be able to move at all without either moving the laser up or down. If I recall correctly, that white gear is what the system spins which in turn spins that little black gear with which it's in contact and is what lifts and drops the laser. If you can spin that white gear freely, then something more severe might be broken. That means either the white gear isn't turning the little black one somehow, or the mechanism the black one uses to move the laser is amiss. That's about the extent of my knowledge on this.

Perhaps another video of you turning the white gear with the tray closed... :P If only we had live group video chat...

Since it does work I really don't wanna sell BUT ITS GETTING TO THAT POINT

[xelement5x]

When you take the tray out and rotate the laser assembly all the way up with the black gear, and then put a disc on and try everything, does it actually read the disc so that you can play it? Lets focus on individually addressing each of the problems before worrying about the tray.

If the laser is shot, the tray doesn't matter anyway, and aligning the tray is just a process that takes trial and error. It took me like 5 hours to troubleshoot and fix my first model 1, and 30 minutes to fix the second one. You just have to really think about how all the bits work together to get a solid understanding of the whole thing.

[SpaceFlea]

Okay, yeah, the tray appears fine. As I suspected, you never did anything with the big white gear (it looks like you were looking at the little white gears under the black one)... I'm talking about the one just to the left of center in the first picture (up and to the left in the second picture)... Once you close the tray you should be able to turn that gear and it will raise the laser. That is the one of concern... see what turning that one with the tray in does for you.

[Melf]

I'm really interested in getting a model 1 unit for my model 1 Genesis, but they seem prone to breaking down a lot. Is this really a common issue? How easy are they to repair?

[jerry coeurl]

This is the reason I prefer the Model 2 Sega CD. Top loader CD units are just better to me, as less moving parts = less prone to breaking down.

Sorry you're having trouble with your unit, OP.

[ThugsRook]

there is a reason why SEGA dumped the M1 and released M2

[snume]

I had a Model 1 that had a problem very similar to the one you are having. I ended up buying one that worked mechanically but that wouldn't read disks and combined the 2 to make 1 good one.

Below the big black gear is a cylinder that has a groove in it that lifts/drops the tray as it turns with the gear. On mine, the cage around the cylinder that holds it in place had broken free from the steel frame around the tray and it wouldn't hold the cylinder still so the little tab at the front of the tray would slip out of the groove and the tray wouldn't lift up. I tried gluing it to no avail and ended up buying the parts unit. It works excellent now. I suspect your tray, after watching you jiggle it in the video, has some of the plastic mounts broken. You could try gluing it with some very strong epoxy that bonds steel and plastic, but you need to let it cure completely before you try to re-assemble.

Hope you can get it fixed. If you'd like to try dismantlilng it further, I may have some parts left over from fixing mine that can help you get yours back up to snuff.