CED VideoDisc and Player Discussion

[Rixrex]

I got an SJT 300 belonging to a friend needing repair, but it's really a bizarre problem tough to figure out.

Anyone ever hear of a SJT player gearing gone out of sync? Or is it a switch not activating or stuck on? Any ideas on this?

[7jlong]

If you haven't already I would check/clean all of the white plastic sensor switches along the caddy path towards the back of the unit. I've seen completely bizarre behavior if one of them is stuck on or off.

I give them a swipe with a swab that is just barely damp with alcohol to loosen and remove any dust or old impurities that might be gumming them up.

[Rixrex]

It's not those, already been checked.

Turned out that it was the small switch that shuts down power when player is in L position after turn on or unloading a disc. It's a switch activated by a slip lever that has a flat spring on it. The disc lift cam pushes the spring and lifts the slip lever against the switch, turning the player off. This involves about 4 or 5 different little parts and if any one of them is off tolerances or gets jammed up, the switch remains on and the cam and gearing roll on over to play position. Not good.

Unfortunately two significant little plastic parts are broken here that are molded into the main player body and may require way more replacement work that it's worth.

[blindfury420]

Can you post a picture it?
_________________
I dont own

McMicheal 5001h
Hitachi VIP202P
JCP 686-5705
RCA SKT265, SKT300
RCA SJT400X, SJT425

[Rixrex]

Okay here are the requested photos. A little soft-focus because my camera can't get too close.

This is the sliding slip lever with the broken plastic dowel. The dowel is supposed to fit into the top grooves of the slip lever to hold it in place,



This is where the slip lever fits in place and the pencil is pointing to where the broken plastic dowel is supposed to be. The little nub you see is a extended hole where a screw point sits, holding in the switch from the other side.



This is the view from the other side where you can see the switch with cover off and where the slip lever is in the right position to shut it off, pencil pointing to that spot. Of course, without the plastic dowel in place, the slip lever will not stay in this position if the player is operated.



In this last photo you can see the broken stem holder where the caddy spline grabber stem is supposed to be held in place. Without this stem being held down on that one side, it will pop out every time a disc is inserted, causing the slip lever to malfunction, creating excessive leverage on it, and I think this is what caused the plastic dowel to bend and snap off.



If you want to see this rather intricate part of the player in operation, you merely have to open the case, and turn it off and on, and then load a disc. You'll see how everything must be in algnment without much sloppiness to work right. You can also see it operate by plugging in the player, leaving it off, and then turning the gears manually so that you move the disc lift lever towards the load position. Once you pass the point where the slip lever releases the switch, the player will come on and force the disc lift lever back to off position.

If you do it with the player not plugged in, you can hear the click of the switch to on as it is released, then turn it the other way and you'll hear the click again of it going back to off.

So if your player won't turn off and just seems to cycle through load and play, or only to play, this switch and its components are the trouble.

The problem with this player is that both broken pieces are molded into the upper carriage and lower case. Replacement is time consuming and means using up a player. The tough one wil be the plastic dowel as access to that spot is limited.

[SelectaVision420]

awesome great info! if it was me, id try to make something work before i cannibalize another player
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caddy.daddy.fleetwood@gmail.com

[Rixrex]

Yeah, I agree.

You might have to use a ZOOM function to see the pictures better.

If I wanted to use another player, it would require a complete tear down and rebuild just to fix the plastic parts. The caddy grabber system will have to be replaced no matter what as it has too many broken pieces, but that's simple.

[MagnaFarce]

Since the SJT 300 is being discussed anyway, does anyone know what I can do to keep mine from shaking? I just picked it up at a flea market yesterday and it vibrates violently and makes a very loud noise when I try to play anything in it.

I'm sure it's the motor, but I don't want to do too much on the inside without first getting advice from people who are more experienced than I am with CEDs, since I have no experience at all.

[blindfury420]

It sounds like the turntable is too low and is scraping the disc transfer rod cap.

You will have to take out turntable and adjust shaft (Measure the exposed shaft underneath the turntable) back to 30/32nds and then put turn table back in. It is possible, that just that will fix it, but you might have to adjust the height also underneath the player with a small alan wrench. You might also want to order a transfer rod cap from here.
_________________
I dont own

McMicheal 5001h
Hitachi VIP202P
JCP 686-5705
RCA SKT265, SKT300
RCA SJT400X, SJT425

[MagnaFarce]

[blindfury420]

You can click on the email button and reach me but pm's don't work on this forum
_________________
I dont own

McMicheal 5001h
Hitachi VIP202P
JCP 686-5705
RCA SKT265, SKT300
RCA SJT400X, SJT425

[MagnaFarce]

Thanks. I probably won't try the fix any time soon because my load at school is pretty heavy, so don't be surprised to get an email from a stranger in January.