CED VideoDisc and Player Discussion

[SekerakSM]

Could someone please tell me to where I should look next. I purchased what I was told a repaired 149000 stylus by cedautum. I put it in my player and all I get is 2 lines on the display. With the cover off I can see the gears turning and moving the stylus. The advance buttons will not work.

History:
This unit worked when I bought it 4 years ago. About a year later I put a broken disk in (must have broke in storage and I didn't know) and that was the last time I was able to watch it. I bought a remand cartridge a couple weeks ago and now I have the problem described above.

[SelectaVision420]

did you remove all the parts of the broken disc? there may be a shard somewhere jamming it from advancing...
_________________
(2)Sears 274 & 934(80150,10&11350), sft100, sgt250, sjt 090-400, vp550, VDR3000, VP2000 & 4000
complete '84 Dimensia Owner

[Rixrex]

Cedatum typically will test their carts before sending them out.

You probably will have to take the player case cover off and do an inspection of it before and during disc playback to see if the stylus is even setting down into place. The are some tests you can perform to track down the trouble, which may not be the stylus itself.

But first, are you getting anything on the LED display at all on the front face?

[SekerakSM]

Yes I removed all the parts. I even took the vac to it and got as much dust off of it. The original disk that was broke was cracked from the center to the outside. It wasn't shattered into pieces.

I can see it advancing. the gears turn and the assy with the stylus does move. When I hit the pause button I can hear a click where the stylus is.

Should I be able to see the tip touching the disk?

[SelectaVision420]

yes teh stylus should touch the disc... i have a feeling this may be circut related issues...
_________________
(2)Sears 274 & 934(80150,10&11350), sft100, sgt250, sjt 090-400, vp550, VDR3000, VP2000 & 4000
complete '84 Dimensia Owner

[SekerakSM]

It looks like the stylus is touching and it does go up and down when the pause button is pushed.

[Rixrex]

Well, it sounds like the stylus is doing it's job and the issue is elsewhere.

If you can hear a click, that means the stylus has either lifted or set down. If the stylus arm advances properly, then that indicated the stylus is doing it's job.

I'd still like to know what your front LED display shows when you are going through the whole play procedure. That is an inmportant part to determine the problem.

Perhaps you have the TV channel set on a different one than what is selected on the rear switch of the player, or the rear channel select switch is dirty, or your cable is bad, or the RF output connect is loose or sloppy.

Sometimes it's just the channel select switch (ch 3 or 4) that needs fiddling with.

[SekerakSM]

- - is what is on the display all the time unless I hit pause then I get - (1 dash)

[SekerakSM]

I have found on the pc board that sits up to that the 2 blue axial capacitors (2200mf and 1500mf) are puking. The black one in the middle has a burn where the lead goes in. Some smart butt put the cap in with the numbers on the bottom so I cant read them and have no idea what the values are for that one. I am gonna replace them and see what happens.

[Rixrex]

Okay, if you are getting the double dashes, but the stylus arm advances correctly otherwise, then you do have circuitry problems that are beyond the point where the servo motor gets the proper signal from the disc in order to advance.

Sounds like you've discovered that...

[SelectaVision420]

i had a feeling this was a circuitry issue, i heard its common for old capacitors to leak
_________________
(2)Sears 274 & 934(80150,10&11350), sft100, sgt250, sjt 090-400, vp550, VDR3000, VP2000 & 4000
complete '84 Dimensia Owner

[SekerakSM]

I really want to thank you for trying to help me and not being smart *sses or jerks! I do appreciate it!

[SelectaVision420]

no prob, let us know if you fix it!
_________________
(2)Sears 274 & 934(80150,10&11350), sft100, sgt250, sjt 090-400, vp550, VDR3000, VP2000 & 4000
complete '84 Dimensia Owner

[Rixrex]

[SekerakSM]

The 3 caps didn't work. Back to the drawing board!

[SelectaVision420]

[SekerakSM]

not yet. just found out my shower was leaking and the sub floor was hanging on by a thread. thats a priority right at the moment. ill post something as soon as i can get back to it

[SekerakSM]

OK, here is what I have discovered. The servo motor does not appear to be working. I marked the shaft to see if it turns. It is not. Both leads have 2.4v DC on them.

[SekerakSM]

let me guess, its not a universal motor/servo and I cant get one?

[Rixrex]

If the servo motor is DC, as I recall it is, you can connect a battery to it to test it's response.

I've had to do this to test the J/K function motor in the past.

Not so sure it is the servo motor just yet.

[SekerakSM]

ok, I can get it moving using batteries. The only reading I can get on either lead now is 9v ac. I cant get a dc reading. How often do the transformers go out?

[Rixrex]

Check the motor label or stamp. Is it actually a DC motor or an AC motor? I just assumed it was DC.

If it's DC and you read AC current, well then that maybe a problem. Are you reading AC current across the two leads, or one lead and a ground?

Normally that servo motor works by advancing quickly once a disc is inserted, stopping when the stylus is in position to set down and then advancing according to the stylus reading the disc signal.

You normally get no advancement nor retreat pushing the FWD or REV buttons unless the stylus has gotten a signal from the disc and that signal is processed properly to direct the servo motor.

At some point the effort may just be futile for the amount of time it will take, and it may be more worthwhile to move on to a working player.