Need parts to fix a model 1 Sega CD?
So I've been having an issue with an expensive model 1 Sega CD I just bought. When I tried it the access and ready light were working and I could hear a slight motor sound inside but the game would not boot and the tray would not eject.
Took it apart and raised the laser assembly into the proper position to read discs and put a game in. Game boots and runs fine so the laser is good. Reassembled some of it and tried getting the tray to work.
The issue is not the rubber band (or if it is, that's another issue I need to deal with later). The problem I am having is with the gears that raise and lower the laser assembly.
My theory is it is the black gear in the middle of that picture or possibly the one under it (the black one next to the white gear).
Or both. here are some more pictures of the gears. Click any of them if you want a bigger picture.
One of the teeth on the top one looks like it may be slightly bent and there is what may or may not be a small chip in the clyinder one, but I'm not sure and neither looks serious.
I can turn the lower gear with a screwdriver to raise the laser assembly easily, like this...
... so I am not sure the issue is the lower gear cylinder. When I turn the large black gear (that turns the cylider that raises the assembly) by hand it hits something, or the gear slips, or something, and the assembly falls down again.
Am I missing a part? Do I not have something aligned properly? Does anyone see an issue with the gears in the pictures? Do you think replacing those two parts may fix this issue? Is my only option to buy another broken system off ebay which are an obscene $40+ to replace those parts? Any other ideas or solutions or issues I may be missing?
Took it apart and raised the laser assembly into the proper position to read discs and put a game in. Game boots and runs fine so the laser is good. Reassembled some of it and tried getting the tray to work.
The issue is not the rubber band (or if it is, that's another issue I need to deal with later). The problem I am having is with the gears that raise and lower the laser assembly.
My theory is it is the black gear in the middle of that picture or possibly the one under it (the black one next to the white gear).
Or both. here are some more pictures of the gears. Click any of them if you want a bigger picture.
One of the teeth on the top one looks like it may be slightly bent and there is what may or may not be a small chip in the clyinder one, but I'm not sure and neither looks serious.
I can turn the lower gear with a screwdriver to raise the laser assembly easily, like this...
... so I am not sure the issue is the lower gear cylinder. When I turn the large black gear (that turns the cylider that raises the assembly) by hand it hits something, or the gear slips, or something, and the assembly falls down again.
Am I missing a part? Do I not have something aligned properly? Does anyone see an issue with the gears in the pictures? Do you think replacing those two parts may fix this issue? Is my only option to buy another broken system off ebay which are an obscene $40+ to replace those parts? Any other ideas or solutions or issues I may be missing?
Comments
The other possibility as you suggest is the gear(s) is damaged. If the one gear turns by hand, it probably isn't that one. I'd guess it's the other gear. The best advice I can give is try to tell very precisely what's happening when you raise the mechanism by hand, and see if you can identify something happening differently when the system tries to do it automatically.
Hopefully someone knows more than that but studying it closely, you may notice something knew. Sometimes I've had to stare at things like this for minutes before I get what's going on and how it actually works. Good luck!
Originally posted by: Guntz
The belt runs the gears that move the tray and the laser assembly. Replace the belt and then see if the drive still has problems.
The drive is fine. Tray ejects and retracts fine. Well, semi fine. When the part that raises and lowers the laser assembly gets stuck or falls sometimes it interferes with the tray but I still think the issue is the laser assembly does not raise all the way, at all, or gets stuck. But if I turn it by hand it raises and lowers fine. The belt also seems fine and I've yet to see it slip once or see the gears it turns slip.
Its sucks that I can't see between the two gears I suspect are the culprit. I still want to try and replace those but for another $40... its just not worth it. Does anyone know of a site that sells consoles broken down into bits? The two gears are also unique so I doubt it will be easy to find an alternative.
With the exception of the laser assembly thing not raising properly the entire console is in excellent shape which is also why I gambled and spent so much on it.
Thanks for helping by the way.
Originally posted by: Guntz
When you spin the gears yourself to lift the laser, does it get stuck and become difficult? The helix screw might have chipped, or you need to add lubrication to it.
If you look at this picture it kind of looks like it may be chipped but I'm not sure if that indent is normal.
I did have no more question, what does the Lock switch on the left side do? Mine is not connected to anything so did something break off there?
I'm having issues with my Sega CD model 1 and found this thread. Apologies if the necro-post bothers anyone.
Originally posted by: Entity
Originally posted by: Guntz
When you spin the gears yourself to lift the laser, does it get stuck and become difficult? The helix screw might have chipped, or you need to add lubrication to it.
If you look at this picture it kind of looks like it may be chipped but I'm not sure if that indent is normal.
This is your problem. That gear cylinder track has a rasied section, caused by repeated friction. The post from the cd tray is catching on the raised section, which prevents the tray from raising to operating position.
You need to fill the section with JB weld, and then smooth out with a sanding bit and dremel.
Sand then test to see if the post runs smoothly throughout the track, while raising and lowering the tray.
Just make sure that when you reassemble everything, you align that large black wheel gear properly. It needs to push that lever underneath it, when the cd assembly is all the way raised. That lever tells the console that the drawer is all the way closed. If it doesnt push the lever all the way in, the drawer will eject automatically.