[Rob Bune]

I’ve order one – before I round off the grub screw!

[Rob Bune]

That’s great news!

 

Which tool are you using to take the grub screw out of the brass spindle to remove the motor? I am trying various small screw driver but none seem to bite. One did wok on the other grub screw on the cam nut.

[Rob Bune]

I managed to get player #2 working, or at least playing discs today.

I first removed the laser carriage (via the 4 screws) and wound the white plastic grub screw that comes out of the carriage motor. It took a few turns but eventually the carriage moved about 10mm. I then powered up and the carriage returns to the stop position – which I think proves that the carriage motor is ok.

I then tried to play a disc, I only had 2 of the laser mechanism screws in loose to keep the mechanism in place. Seemed to play ok – I then put all 4 screws in tight and the disc would not play and the disc was lightly knocking or rubbing against something. I noticed that if I loosen the front two screws and lift the mechanism with my fingers by a mm or two the playback works fine and the rubbing stops.

So I think the spindle needs to be adjusted – lifted up so that the disc is spinning a little higher than at present. Perhaps in your case if you have temperamental playback it could be related to this same issue – just try lifting the mechanism once the cd is loaded to see if it makes a difference!

 

[Rob Bune]

Madskp wrote:

On your player #1 have you noticed if the CD start the counter at 0.00 or if it is a minute or more into the first track?

 

It starts at 00:00 – the start of the track according to the display. I noticed that on my player #2 i was displaying 00:00 too but would not begin playing the disc.

On player #1 I have made the necessary adjustments to the draw to make it close nicely – I couldn’t figure out why the eject wasn’t working (by pushing the draw fascia) – only manually engaging the micro-switch worked. The fascia of the tray fixes and snaps down on to the hinge (see arrow 1), mine was not fully engaged so when the draw closed the back of the fascia was not making contact with the lever arm for the eject – that took some figuring out. I also managed to find a screw to secure the arm of the tray which had become detached (see arrow 2). Originally it looks like a tiny rivet was used, I found a screw which does the job.

The final job is to add some springs that keep the lower disc raiser level – that might be the most challenging job yet.

[Rob Bune]

Player #1 is now playing the discs. With a light source I shone into the side of the player I could see that when the disc was raised there was still a 1-2mm gap between the disc and the grabber. So I further tightened the brass knob and although I was sure the cam could not be any lower it made a difference. the disc now spins and will play the disc seemingly without any issues – although I have not listened to any music only observed.

So a note of warning – the sound heard in the video posted above in my case was not related to the spindle motor issue which the comments suggested was the issue.

Player #2 is still not playing discs but I suspect the issue here is the motor which I probably have nothing to lose in attempting the service.

For the temperamental issues of the player have you tried cleaning the laser lens – and are the cams on the laser housing all complete and lubricated?

 

[Rob Bune]

So so progress of sorts.

On player #1 – I still cannot get the disc to clamp properly but I think it is because I am missing the springs which keep the raiser level when it rises.

On player #2 – I played with the brass knob, too tight and discs won’t rise, but I loosened it and the disc is clamped and I can see it spinning. I gave the spindle motor a nudge and it starts to spin – but clearly it has a problem. It is quite noisy. But the TOC seems to be read as I see the correct number of tracks on the display and I can move through the track – but they don’t play. So I believe the issue on this player is the motor.

 

[Rob Bune]

Yes I saw in the comments to the suggestion that the motor requires cleaning and or lubrication. However the two non-working players that I have both had broken belts, so I am reluctant to believe that 2 players both developed in addition a problem with the motor. Also one player I am repairing for a friend who told me that discs were playing fine before the cd tray stopped ejecting, So unless this two issues are a symptom of one another I am reluctant to start stripping the motor down especially since it appears not not to be a simple job.

I should add that with both players it appears to me that the disc is not actually spinning – the motor is moving but it seems it hasn’t quite grabbed the disc so maybe I will try the adjustments of the copper nut first and also tiny adjustment of the teeth of the main cam.

[Rob Bune]

In the video the raiser appears to lift at the end of the movement, that looks correct to me.

[Rob Bune]

Ok I found the issue, lower disc raiser was a little bent, the disc are now being raised correctly.

However discs don’t seem to be spinning and the laser is making a seeking/scratching sound – exactly like in this video:

https://www.youtube.com/watch?v=bclDp8K4oo4

I have two players doing this 🙂

Any ideas?

Thanks.

[Rob Bune]

it seems that this forum’s interest for the CD-50 possibly died a little of late – the archived version has lots of historical posts and contributions from many members who no longer seem to here!

[Rob Bune]

Thanks that link is very helpful. It seems the cog is correct and the raiser should dip at the end of the travel. So my issue is that the disc is not being picked up by the motor when it is raised, it simply drops back down as it would when ejecting.

The disc isn’t ever going to clamp.

[Rob Bune]

It is my photo, there are two small tabs shown in arrows that are broken. Anyway I sourced that part.

The disc now loads but won’t play. I can here a clicking sound as the motor spins.

When the tray closes the disc raises but drops again at the end of the travel. Seems to be because of the groove on the cog… Is this correct?

Should the disc be picked up when it is raised, because to me it looks as if the disc is just sat in the tray?

I don’t have the CD mechanism screwed down but it lined up with the screw holes and I have tried minor adjustments.

Any ideas? Thanks.

 

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