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 Post subject: [DVL-909] Clattering noise when skipping chapters
PostPosted: 07 Apr 2019, 13:03 
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My DVL-909 makes a fairly noisy clattering/rattling noise when the 'next/prev chapter' button is pressed while an LD is playing. During normal playback it's fine.

I thought at first it must be something to do with the laser carriage, but then noticed it doesn't occur with CAV discs, so think instead it might be coming from the spindle motor as that tries to quickly slow down or speed up (it also rattles a little when it's doing a normal 'startup' acceleration or a side-change decelerate/accelerate, but not as noticeably as when skipping chapters).

Is this a problem anyone else has noticed? Is there a quick fix? Alternatively I have a 'for spares' DVL-919 which doesn't do this - I could swap components (the whole motor?) if it's not too difficult? I did try swapping the 'clamp' assembly from one player to the other, but that didn't help.

It doesn't seem to be affecting the operation of the player (yet) but it would be nice to rectify it.

Any advice? :-)
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 Post subject: Re: DVL-909 - clattering noise when skipping chapters
PostPosted: 07 Apr 2019, 15:45 
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Does this do it with all CLV discs?? or just some??

I've had this issue on some discs, it has a clicking sort of grinding noise when trying to find chapters.

Remember LD is very large and players are not quite to begin with.
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 Post subject: Re: DVL-909 - clattering noise when skipping chapters
PostPosted: 07 Apr 2019, 17:30 
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It’s hard to say if the noise is normal without knowing your experience level. The spinning up/down of the disc in CLV is noisey on all but the most high end players and if you switch chapters a lot making the discs spin up and down a lot you will hear more noise.

“Clattering” usually implies some loose metal is banging around, and that would not be good, but laser sleds can make some pretty strange and confusing noises.
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 Post subject: Re: DVL-909 - clattering noise when skipping chapters
PostPosted: 08 Apr 2019, 18:45 
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signofzeta wrote:
It’s hard to say if the noise is normal without knowing your experience level. The spinning up/down of the disc in CLV is noisey on all but the most high end players and if you switch chapters a lot making the discs spin up and down a lot you will hear more noise.
Ah I should have made it clearer that I do also own a DVL-919 which, although it has other problems, does play LDs, and when skipping forward and backwards it just makes the normal gentle whirring and swooshing that you'd expect - so there's definitely something not quite right with my DVL-909.

I'm thinking it could be either that the motor is not fully secured to the player (haven't investigated that yet) - although that seems unlikely, as it would cause playback problems I imagine, or, more likely, the bearing of the motor itself starting to wear after too much spinning over the years...
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 08 Apr 2019, 19:42 
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OK, you know whats normal then. My only suggestion now would be to take the cover off and watch it in action and see if you can get any clues from that. It could still be laser sled noise because sometimes they make some crazy pitching sounds as they attempt to track the disc in high speed. Normally any bearing noise is going to be worse at CAV speed than anywhere else and is unlikely to only exhibit itself in transients so I'm not so sure its motor related. It could be the laser sled motor or its gear drive...

I'll be the first to admit that LD has many unknowable aspects so really my highest quality advice is "Good luck!".
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 Post subject: Re: DVL-909 - clattering noise when skipping chapters
PostPosted: 10 Apr 2019, 19:41 
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yaffle2345 wrote:
signofzeta wrote:
It’s hard to say if the noise is normal without knowing your experience level. The spinning up/down of the disc in CLV is noisey on all but the most high end players and if you switch chapters a lot making the discs spin up and down a lot you will hear more noise.
Ah I should have made it clearer that I do also own a DVL-919 which, although it has other problems, does play LDs, and when skipping forward and backwards it just makes the normal gentle whirring and swooshing that you'd expect - so there's definitely something not quite right with my DVL-909.

I'm thinking it could be either that the motor is not fully secured to the player (haven't investigated that yet) - although that seems unlikely, as it would cause playback problems I imagine, or, more likely, the bearing of the motor itself starting to wear after too much spinning over the years...


I had a DVL-909 that did this as well. I ended up replacing the spindle motor and the problem went away. I had a CLD-D505 that also did this and replacing the motor fixed that one too (both players use the same spindle motor).
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 21 Apr 2019, 19:10 
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I did think about trying to swap the (good) motor from my battered old partially-functional 919 with the (bad) motor in my otherwise lovely 909, but my heart quailed when to-day I took the tops off the machines, realising I was on a path that might lead to both machines not working.

I did find some instructions for changing the motor here, but am unsure whether there'd need to be any calibration after the change, for which I probably won't have the necessary disc or equipment. It doesn't look as though there'd be any possibility of physical adjustment of the position of the motor, as, as far as I could see, it's just fixed in position with three screws.

Perhaps I should endure the clattering until the motor gives up altogether - which, given I don't use the machines a lot, might not be in my lifetime :-).
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 22 Apr 2019, 05:24 
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As long as you don't try to move the turntable on the spindle motor, you won't have any issue with adjustments regarding changing the motor. If you are feeling brave, here are the steps to disassemble the player to get to the motor.

1. Turn on the player. Press the LD Eject button. Then unplug the player from the wall so the tray does not close.
2. Remove the bonnet.
3. Along the back edge of the tray are two locking clips. Push them both in at the same time and pull the tray from the front of the player.
4. Remove the 4 screws on the back of the player that hold the turn mechanism cover.
5. Unplug the 7 cables from the DVDM board and then remove the 4 screws that hold the board and remove the board.
6. Remove the grounding wire between the frame and the player mechanism.
7. Remove the 4 screws that hold the clamp assembly to the frame. It's easiest if you take out the screws at the back panel and front panel and lift the two cross bars and the upper clamp assembly as one piece.
8. Take out the three screws that hold the front panel. Lift up the tabs slightly and rock the front panel down. The connecting cable between the front panel and the DVDM board should have already been removed. There is also a grounding wire on the right side of the player. Remove the screw holding it down.
9. On the player mechanism, there are 2 heavy springs, one on each side at the back of the player. Unhook the spring from the top of the frame and hook it on the player mechanism (there is a convenient hook on each side of the mechanism to hold the spring while doing the work. Isn’t Pioneer nice?)
10. Disconnect the Green/White cable on the power supply. This is the motor lead.
11. Disconnect the wide LD Pickup flex cable at the back of the player. Removing the tray hold may make this easier. Pay close attention to how the pickup cables route through the hook on the side of the tray holder.
12. Disconnect the narrow white cable just forward from the LD Pickup connector. This is the Pickup Rotation connector.
13. At the front of the board, there are two white cables that attach close together. You want to disconnect the one perpendicular to the mechanism (second connector from the left). This is the loading motor connection (among other things).
14. Use a long thin phillips head screwdriver to remove the recessed screws on the black plastic player mechanism. A magnetic tip screwdriver is best. These screws are extra long screws and should be kept from the others so as to not mix them up. There are a total of 4, one in each corner of the black plastic mechanism.
15. At the back of the mechanism are two hold down clamps. They hook around the mechanism and hold down the assembly. Remove one screw from each and lift both out.
16. At this point, the mechanism should be free. Carefully lift it up and insure all connections are free. It is easiest to push the mechanism further back into the player so the tray roller clears the front of the player. Lift the front of the mechanism out first, then bring the entire assembly out.
17. At the front of the motor is the rotation speed sensor. Slide it over to the left to move it out of the way.
18. On the bottom, make note of the routing of the green/white motor wires and the orientation of where the wires come out of the motor.
19. Remove the three screws holding the motor.
20. The motor will come out of the bottom. You’ll have to tilt it around to get the turntable through the access hole.
21. Reverse the entire process with the replacement motor.

22. When putting the tray back in, be sure to get it in square. It is very easy to get the tray off one tooth on either side, and if off, it will not close all the way. I usually put it in with the power on.


Last edited by blam1 on 28 Apr 2019, 20:29, edited 1 time in total.
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 22 Apr 2019, 11:05 
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blam1 wrote:
As long as you don't try to move the turntable on the spindle motor, you won't have any issue with adjustments regarding changing the motor. If you are feeling brave, here are the steps to disassemble the player to get to the motor.
Thanks very much for those instructions, very comprehensive! I feel more confident about trying the 'transplant' now :-) Will post here once it's done, either with smiles or tears :-)
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 28 Apr 2019, 19:27 
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yaffle2345 wrote:
blam1 wrote:
As long as you don't try to move the turntable on the spindle motor, you won't have any issue with adjustments regarding changing the motor. If you are feeling brave, here are the steps to disassemble the player to get to the motor.
Thanks very much for those instructions, very comprehensive! I feel more confident about trying the 'transplant' now :-) Will post here once it's done, either with smiles or tears :-)

I followed these instructions very carefully step-by-step - and all turned out well!

My 'good' player now has a 'good' motor from my 'bad' player, and the 'bad' player has the 'bad' motor from my 'good' player. The 'clattering' noise did transfer over with the motor as I hoped.

Presumably when skipping tracks on a CLV, there's some extra stress on the motor as the player tries to slow the disc down quickly which causes a worn bearing to 'knock' - but when smoothly accelerating or decelerating for a side change or a start/stop, there's less force applied so the 'knocking' is less obvious.

Anyway I don't think I'd ever have risked this without those instructions, so thanks again :-)
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 Post subject: Re: [DVL-909] Clattering noise when skipping chapters
PostPosted: 28 Apr 2019, 20:28 
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yaffle2345 wrote:
I followed these instructions very carefully step-by-step - and all turned out well!

My 'good' player now has a 'good' motor from my 'bad' player, and the 'bad' player has the 'bad' motor from my 'good' player. The 'clattering' noise did transfer over with the motor as I hoped.

Presumably when skipping tracks on a CLV, there's some extra stress on the motor as the player tries to slow the disc down quickly which causes a worn bearing to 'knock' - but when smoothly accelerating or decelerating for a side change or a start/stop, there's less force applied so the 'knocking' is less obvious.

Anyway I don't think I'd ever have risked this without those instructions, so thanks again :-)


Excellent news! Thanks for letting us know the outcome!
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