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 Post subject: [CLD-M301] Won't spin disc
PostPosted: 01 May 2022, 21:04 
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Hello,

This is my first post.

I recently tried playing a CD and LaserDisc on my Pioneer M301 with no luck. Everything is fine until it tries to play and then with CDs, the robotic arm puts it back in the tray, and the LaserDisc doesn't spin. There are no error messages on the front display. I did change the belts because the old ones were in bad shape.

I don't want to look for a newer player but would buy one for parts if someone could tell me what the problem might be.

I tried attaching a WMV file of it loading and trying to play a CD but I couldn't submit the topic.

Thanks,

Maxx
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 01 May 2022, 21:25 
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When you put an LD in the player, does the disc wobble (assuming you took the cover off to see what it does)?
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 01 May 2022, 21:35 
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No wobble. I would like to attach the WMV file I made so everyone could see what happens, but it won't send.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 01 May 2022, 22:09 
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Post the video on YouTube and provide a link. That’s what I do.

Also, is this a player you have had for awhile or did you just acquire it?
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 01 May 2022, 23:27 
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Bought this player brand new when they came out.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 02 May 2022, 01:27 
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Ok. That is a good starting point.

I assume it was maybe sitting around for awhile which explains why you mentioned belts. Which belts did you replace? There are four total of which two are in the CD changer mechanism, one moves the laser assembly, and one is the loading belt responsible for tray & clamper movement along with tilt.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 02 May 2022, 05:41 
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I think I got all the belts.

Optics belt also a loading belt up front under the tray. There are also two small belts on either side of the robotic arm. I had to remove the arm and flip it over to replace them.

Could you provide a drawing or link that shows where all the belts are located in case I missed something? Not sure about the belt that controls tilt.

I hope to get the video posted soon.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 02 May 2022, 06:25 
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This is the YouTube link to view the player trying to spin a CD.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 02 May 2022, 08:17 
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I looked @ the video and it appears to be functioning well mechanically so I assume the belts are likely fine (but more on that).

However, I think the movement of the laser assembly doesn't appear quite normal. Can you verify if you see a red glow coming from the lens assembly as well as the lens itself moving up & down? If not, you might want to see about trying to re-seat the ribbon cable as it could have developed some condensation build up if the player was stored in a somewhat damp environment.

If a red glow does come up, it's possible your loading belt (located near the front of the player under the tray) could be the culprit even though it does appear to be doing the job correctly. The reason is that this belt is essentially lifting the most heavy tray Pioneer ever made for a CD/LD player and a minor amount of slippage can prevent the clamping assembly to fully engage. I would see about removing the belt and go about cleaning it along w/ the pulley parts it attaches to w/ a swab dipped in alcohol to ensure any possible oily or old rubber contaminants are removed and then try again. Also, did you get the proper belt for it. It should be PEB-1013.

Let me know what you find.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 02 May 2022, 14:13 
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I think I hear the lens hitting the disc.

I had one of these with bad spindle motor, but it also had an awful rotten fish odor (I assume from the capacitors inside the spindle.)
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 01:29 
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When it taps the disc that hard you got problems, you're going to have to be able to use an oscilloscope and trace signals if you cannot find a power supply issues.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 03:21 
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Thanks all for the helpful advice.

I did order another loading belt and will hopefully get it by this weekend. I won't have time to work on this until later this week.

I don't see any red glow but will try re seating the ribbon cable when I replace the loading belt.

I have no oscilloscope available and wouldn't know how to use it if I did.

I thought it might be the spindle motor but am not sure..
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 05:00 
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I defer to Kurtis & Cplusplus on this as they have way more experience in these more complicated technical issues.

However, it wouldn't hurt to clean that belt to see if it has some effect (especially if the laser might actually be working but you couldn't see it). My experience with my M90 appears that it is more sensitive because of the tray weighting a lot more than other players and a good tight belt seemed to be my solution.

As for the fish smell Cplusplus mentioned, can you confirm the inside of your player has that odor?
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 14:28 
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maxxpioneer42 wrote:
I thought it might be the spindle motor but am not sure..

The spindle will not spin if the optics are unable to achieve focus.

ldfan wrote:
As for the fish smell Cplusplus mentioned, can you confirm the inside of your player has that odor?

It has been a while since I was working on it, but I think I still have it somewhere. It was definitely the bad electrolytic smell. I think I remember the spindle having issues. I later discovered some spindles have three electrolytic capacitors inside the metal housing, so I'm not sure if it was coming from there or the power supply. I'll dig it out and make a post if there is anything interesting going on.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 15:51 
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There is no fish oder in my player.

I can turn the spindal by hand but it doesn't even begin to spin before the robot arm returns the disc to the tray.

If I try playing a laserDisc, it picks up the disc and then sets it back down and does nothing else.

If I push play again, the display shows play and then stop right away.
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 03 May 2022, 17:21 
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Sounding more like a laser issue now. Re-seating the flex cable for it might be a last ditch effort but after that and if it still doesn't work you're looking at what Kurtis stated.

It could also simply be a bad pick-up and getting a working one might be very attainable since I think it's the same one used on their single side players in the same model year (just did a quick check and found CLD-990 & CLD-1090 had the exact same laser pick-up for my CLD-M90 which should be the same for an M301).
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 08 May 2022, 04:08 
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I've replaced the belts and re-seated the ribbon cable.

It still won't play a disc.

Can someone tell me if the LED, next to the laser assembly should always be lit, even when you just turn the power on?

I don't see any light coming from the LED at all.

What is it supposed to do?

Thanks,

Maxx
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 Post subject: Re: Pioneer CLD M301 won't spin disc
PostPosted: 09 May 2022, 23:59 
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maxxpioneer42 wrote:
I've replaced the belts and re-seated the ribbon cable.

It still won't play a disc.

Can someone tell me if the LED, next to the laser assembly should always be lit, even when you just turn the power on?

I don't see any light coming from the LED at all.

What is it supposed to do?

Thanks,

Maxx


The LED next to the laser is the tilt sensor, no it should not be lit.

The laser will only be lit when the lens is moving up to try to get a return signal off the disc, if the electronics does not receive a return to signal a disc has been inserted it stops there. Spinning only occurs after a disc is verified as inserted and then the unit advances to the next step to spin the disc, turn on the laser, focus on the disc, and read the table of contents.

You are not getting a return from the laser so it will not try to spin as it thinks no disc is inserted. Either the laser is bad or the drive electronics are bad. If you have an oscilloscope then you can connect it to the power line for the laser so see if the electronics sends a pulse to for disc detection, you'll have to have the oscilloscope setup to trigger on a pulse detection.
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