Problem with Meridian 508.20 transport - Page 2 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 1st September 2011, 05:38 PM   #11
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
to remove the blue gear, I use a screw driver in the version as showed about
Schraubendreher abgewinkelt, für Schlitzschrauben : Bahco-Werkzeuge
What is the english name for this tool? My english is bad. but I think, the name is "angled screwdriver" or "bend screwdriver".
go to post #34 about
bigsby on a tele with vintage bridge - Telecaster Guitar Forum
The bend must be in the correct kind appropriate for this task.
An additional advice: look to a used computer cd drive CDD3610 - except the laser head all parts (like the blue gear and the fixing stuff for the guide rods so as the sleed motor) are the same.
Attached Images
File Type: jpg Loder-Tray L1265 im Philips CDD3610.jpg (68.1 KB, 46 views)

Last edited by tiefbassuebertr; 1st September 2011 at 05:48 PM.
  Reply With Quote
Old 1st September 2011, 09:27 PM   #12
sattwa is offline sattwa  Italy
diyAudio Member
 
Join Date: Mar 2011
Hallo viele Danke für die Antwort!
Why a bent screw driver should be better?
I am a bit afraid of breaking that blue gear, so I am now waiting for a help of a friend who said he's done it manytimes.
But I feel better knowing that parts are easy to find!
  Reply With Quote
Old 1st September 2011, 10:50 PM   #13
sattwa is offline sattwa  Italy
diyAudio Member
 
Join Date: Mar 2011
Oh I finally did it!
very carefully and little by little I bent one and then another of the three little climps and the blue gear came out very easely!!
As I suspecter it was not particulary dirty.
What I did find dirty is where the transport slides on the plastic (upper part of my picture). I could not see anythink by eye, but using a little sheet of paper I could find a lot of that brown decomposed nasty grease that was hidden under the plastic.
After cleaning I put every thing back in their place.. and.. guys I know I shouldn't be talking too soon, but the player seems to be working correctly without skiping!!!!! :-))))
Can't believe it!
Let's hope it's really fixed.. ;-)
  Reply With Quote
Old 2nd September 2011, 06:12 AM   #14
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Pleased to hear it's working. That grease was a major problem at the time.

Just be aware that you can not swap the blue gear for the "white" one used on similar mechs. Although they appear similar the "backlash" is different and the CDM12.4 fails to read the TOC when these gears are used.

Also the grey platter is different to the black ones (magnetic polarity of clamp is reversed)
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote
Old 2nd September 2011, 07:11 AM   #15
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Quote:
Originally Posted by Mooly View Post
Pleased to hear it's working. That grease was a major problem at the time.

Just be aware that you can not swap the blue gear for the "white" one used on similar mechs. Although they appear similar the "backlash" is different and the CDM12.4 fails to read the TOC when these gears are used.

Also the grey platter is different to the black ones (magnetic polarity of clamp is reversed)
In my own CDD3610 devices follow mechanical parts from the loader are different:
1) the clamper unit (outline and magnetic polarity of clamp itself is reversed, as you say)
2) the optical pickup
3) the motorpulley
The gear color is also blue, only the (very little) fixing parts for the guide bar (guide rail) are here in black (at CDM12.4 mech this color is white).
But it is not to rule out, that there are different mech. versions of CDD3610.
But still good for a first task to disassembly to get practice.

Last edited by tiefbassuebertr; 2nd September 2011 at 07:19 AM.
  Reply With Quote
Old 2nd September 2011, 11:22 AM   #16
sattwa is offline sattwa  Italy
diyAudio Member
 
Join Date: Mar 2011
Just a little question.
I did not put any other grease to replace the one I removed. I read in some other posts that you don't really need some grease in the transport (if you have it it's ok, but it's not a must).
What do you think?
  Reply With Quote
Old 2nd September 2011, 11:28 AM   #17
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
I always used grease (post #4) so can't really comment otherwise on that one. The way the sled "slides" on the chassis suggests it should be greased really. A tiny dab on the gear spindle and the worm gear too. But it may well work OK without.

You did ask
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote
Old 2nd September 2011, 12:15 PM   #18
sattwa is offline sattwa  Italy
diyAudio Member
 
Join Date: Mar 2011
I guess it works fine without but some grease surelly will help reduce mechanical wearing.
I have some silicon-based grease for lab glassware, but I don't know if it is good for this use. I wonder which specifications this grease should have to be suitable int transports..
  Reply With Quote
Old 2nd September 2011, 12:25 PM   #19
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
It shouldn't be too thick or "sticky" if you apply it to the worm gear. If it is it can cause problems reading the disc contents as the CDM12.4 scans the whole disc at very high speed when it reads the TOC. If the grease is thick it slows that down and it can throw it out as an error. It's not that critical, just nothing too thick or goey.

I would just try it on the sliding parts to begin with.
__________________
-------------------------------------------------------
A simulation free zone. Design it, build it, test it.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Help Request: Meridian 508.20 Skipping Stonker Digital Source 13 6th June 2012 03:51 PM
Meridian 508 Transport Problems TooManyTurntables Digital Source 7 8th October 2010 02:10 PM
Meridian 508-20 Richard984 Digital Source 14 2nd February 2008 09:49 AM


New To Site? Need Help?

All times are GMT. The time now is 11:17 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2