LaserDisc Database
https://forum.lddb.com/

[CLD-D704] Lubricating the Upper Clamp
https://forum.lddb.com/viewtopic.php?f=53&t=9726		 Page 1 of 1
Author:  silvershot [ 24 Mar 2021, 17:27 ]
Post subject:  [CLD-D704] Lubricating the Upper Clamp
I have an issue on one of my 704s and I believe the issue lies in the upper clamp. Is there a proper way to clean and lube it, and what are the preferred methods and products?

Thanks!
Author:  signofzeta [ 24 Mar 2021, 18:05 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
Is it not gripping? Or is it not letting go?
Author:  cplusplus [ 24 Mar 2021, 21:47 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
Only spindle related greasing I do are the small ball bearings in the clamp and center of spindle itself. This is to reduce sound though, not to help loading or playback.
Author:  ldfan [ 24 Mar 2021, 22:42 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
I clamper shouldn’t need any lubrication from the perspective of when the disc begins spinning. Once the magnet locks down the disc, it is completely disengaged from the clamper housing to spin freely.

Like signofzeta and cplusplus said, the only lubrication would be the release mechanism not working properly like when a CD is stuck to it during eject.
Author:  silvershot [ 24 Mar 2021, 22:44 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
Yes, it's just the sound, no grip issues. In the meantime, I found the below thread which describes my exact problem. There's even a youtube video linked, https://youtu.be/Pa_9gU6wWm4 - and my player makes the exact same sound. Based on that thread, it seems like it's the spindle bearing and not the upper clamp.

What's the best way (and product) to lube these?


[CLD-79] Squealing Noise


EDIT: when I say sound, I am referring to mechanical noise, not audio from the disc.
Author:  krbahr [ 24 Mar 2021, 23:17 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
ldfan wrote:
I clamper shouldn’t need any lubrication from the perspective of when the disc begins spinning. Once the magnet locks down the disc, it is completely disengaged from the clamper housing to spin freely.

Like signofzeta and cplusplus said, the only lubrication would be the release mechanism not working properly like when a CD is stuck to it during eject.


Starting with the 503 and 703 Pioneer depends on the top brace to press down to secure the clamp of the disc. The older players have the strong magnet to clamp the disc. On the newer players There is actually a little button on the top brace that a ball bearing on the top of the upper clamp turns on. If the button has a bump wore in it it may need replacing.

BTW; you don’t see all the slipping on the older magnet design even though it used the same type of rubber mat as the newer players.
Author:  cplusplus [ 24 Mar 2021, 23:52 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
krbahr wrote:
BTW; you don’t see all the slipping on the older magnet design even though it used the same type of rubber mat as the newer players.

Very true!
Author:  ldfan [ 25 Mar 2021, 00:00 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
krbahr wrote:
Starting with the 503 and 703 Pioneer depends on the top brace to press down to secure the clamp of the disc. The older players have the strong magnet to clamp the disc. On the newer players There is actually a little button on the top brace that a ball bearing on the top of the upper clamp turns on. If the button has a bump wore in it it may need replacing.


Thanks for the education. I did not know that. I guess I should be happy the majority of my players were made before the 503/703 models. ;)
Author:  signofzeta [ 25 Mar 2021, 01:05 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
silvershot wrote:
Yes, it's just the sound, no grip issues. In the meantime, I found the below thread which describes my exact problem. There's even a youtube video linked, https://youtu.be/Pa_9gU6wWm4 - and my player makes the exact same sound. Based on that thread, it seems like it's the spindle bearing and not the upper clamp.

What's the best way (and product) to lube these?


[CLD-79] Squealing Noise


EDIT: when I say sound, I am referring to mechanical noise, not audio from the disc.


There is no way to lube the spindle bearing. You need a new motor if it’s bad.
Author:  silvershot [ 25 Mar 2021, 21:09 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
signofzeta wrote:
silvershot wrote:
Yes, it's just the sound, no grip issues. In the meantime, I found the below thread which describes my exact problem. There's even a youtube video linked, https://youtu.be/Pa_9gU6wWm4 - and my player makes the exact same sound. Based on that thread, it seems like it's the spindle bearing and not the upper clamp.

What's the best way (and product) to lube these?


[CLD-79] Squealing Noise


EDIT: when I say sound, I am referring to mechanical noise, not audio from the disc.


There is no way to lube the spindle bearing. You need a new motor if it’s bad.


Oh man - from what I've read in other threads, that is not an easy replacement.
Author:  signofzeta [ 25 Mar 2021, 22:03 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
You have to find the part and then you need to put it in and then you need to verify alignment. Major work, sadly.

Grasshopper did mine last time, Duncan the time before, both have since left the building.
Author:  cplusplus [ 26 Mar 2021, 00:33 ]
Post subject:  Re: [CLD-D704] Lubricating the Upper Clamp
You can dial it in with patience but an oscilloscope makes it quick work.
Page 1 of 1 All times are UTC [ DST ]
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group
http://www.phpbb.com/