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 14th May 2008, 09:37 AM   #1
mgm31 is offline mgm31  France
diyAudio Member
 
Join Date: Sep 2005
Location: Toulouse
Unhappy Help with Marantz CD50 skipping tracks

Hi,

I've bought a Marantz CD50 equiped with a CDM4 mechanism.

The player is skipping some informations ("clic" noise, like if you are moving forward).

This problem is not all time.

I changed the laser pickup only, not the spindle motor : I can't disassemble it and the CDM4 is a special one "composite", not the usual found on others players.
I checked the laser power and laser focus according to the service manual (I don't have a philips test cd, I use a normal CD as the track is only 1Khz sine wave I guess).

Does the spindle motor can be defective ?
Do you experiment same problem and solve it ?

Thanks a lot
  Reply With Quote
Old 14th May 2008, 09:22 PM   #2
diyAudio Member
 
Scorpio(DDMF)!'s Avatar
 
Join Date: Apr 2005
Location: Belgrade
Default Re: Help with Marantz CD50 skipping tracks

I don't think you have a laser or spindle motor related problem.

You can try this:

When the random ff-ing occurs, apply a little bit of pressure on the clamp holder (the big plastic thing that holds the cdm4's clamp) and see if the ff-ing stops...

It seems to be a vibration-related problem; you'll need to inspect the spring clamp for loosing some tension and also the state of the transport suspension springs and shock absorbers...

Also, I believe that the track 1 on the Phillips disc needed to trim the laser current and focus offset is a regular music track (not a 1 KHz one). For that purpose, you can use the first track of a normal pressed cd from your collection; preferably the one which when played makes the laser current the highest (has the highest reflectivity).

Hope it helps,

Cheers!
__________________
"Yes, yes, I know numbers don't lie!" - Foghorn Leghorn
  Reply With Quote
Old 17th May 2008, 07:41 PM   #3
mgm31 is offline mgm31  France
diyAudio Member
 
Join Date: Sep 2005
Location: Toulouse
Thanks

I tried to clean the clamp and check for correct pressure but this did not help to solve the problem.

I will check again the suspension springs.

The problem is on several tracks, not only the first or second.

I thing that this player will go to the dust bean !!
  Reply With Quote
Old 18th May 2008, 12:16 PM   #4
diyAudio Member
 
Scorpio(DDMF)!'s Avatar
 
Join Date: Apr 2005
Location: Belgrade
Quote:
Originally posted by mgm31
Thanks

I tried to clean the clamp and check for correct pressure but this did not help to solve the problem.

I will check again the suspension springs.

The problem is on several tracks, not only the first or second.

I thing that this player will go to the dust bean !!
You applied the extra pressure onto the clam while the unit was ff-ing and nothing happened?

Before you scrap the unit, maybe you should try to run it without its drawer (you'll need to insert CD's manually) and see if the problem persists. When (and if) it happens, try to steady the transport (plastic part on which the CDM4 is screwed on) with your hand to see what happens...

In any case I would suggest an inspection of the transport springs and shock absorbers...

Don't give up without a fight

Cheers!
__________________
"Yes, yes, I know numbers don't lie!" - Foghorn Leghorn
  Reply With Quote
Old 19th May 2008, 08:00 PM   #5
mgm31 is offline mgm31  France
diyAudio Member
 
Join Date: Sep 2005
Location: Toulouse
Yes, I tried without the drawer and with extra pressure on the clamp but without success

I found a cheap marantz CD52 MkII (not so good sounding, bitstream conversion)

The mecanism CDM4/19 is the same.

I swaped the entire mecanism (laser + spindle motor) and it's working !!
The spindle motor seems to do less noise.

I will try to but the suspected one on the cd52 to see if the problem is on the spindle motor or not.
  Reply With Quote
Old 4th March 2010, 12:41 PM   #6
diyAudio Member
 
Malefoda's Avatar
 
Join Date: Jun 2006
Send a message via MSN to Malefoda
Quote:
Originally Posted by mgm31 View Post
Thanks

I tried to clean the clamp and check for correct pressure but this did not help to solve the problem.

I will check again the suspension springs.

The problem is on several tracks, not only the first or second.

I thing that this player will go to the dust bean !!
Where is your dust bin ?
Solved ?
__________________
QED T260, Thorens TD-318, Marantz CD-43, TK2050, JBL 4313B & MJK's OB: music!
  Reply With Quote
Old 5th March 2010, 07:02 AM   #7
diyAudio Member
 
Join Date: Jul 2004
Location: Edmonton, AB Canada
I've seen some transports make a mechanical "click" sound when they start to skip or you cue forward (I don't know the CD4M exactly). The worm shaft gear was ratcheting due to lack of grease on the slides. I use molylube to fix that.
  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
Marantz CD50 mods Almeg69 Digital Source 21 21st November 2009 08:03 AM
Marantz...CD50...CD52...CD60.... Lyra Digital Source 17 12th February 2009 10:27 AM
Marantz CD50 Mod that is just stunning Chris Daly Digital Source 10 5th July 2008 10:03 AM
Marantz CD50 not functioning properly after mods honinbou Digital Source 6 6th January 2008 10:52 PM
Help with skipping Marantz CC-52 griff Digital Source 6 30th October 2002 10:11 PM


New To Site? Need Help?

All times are GMT. The time now is 07:36 AM.


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