I like to buy cdm9pro

[rotelonik]

Dear diyers!

Please help!.

I have Rotel RCD 990 .This Rotel is defective,and problem is cd transport cdm9pro .It is not only problem with laser, motor is also dead.
I looking for all Internet for cdm9 pro ,but was unable to find source.May be some of you have spare ? I will like to buy it.

[Gasho]

How you know that laser and motor are dead. Motor is hall efect an can´t be easely be dead.
Maybe it is the driver stage of motor , and laser?

CDM9pro is wery hard to find , near imposible.

I have 990 to , but no problem for now.

[rotelonik]

Flexible belts from laster & motor are broken.

[tubenut]

I doubt you will find a Pro Mech. They have been made from unobtainium for some time!!!!!

The best you could do I to carefully try and remove the spindle from the motor shaft after having measured and recorded the gap between it and the metal chassis.... Remove the motor and then solder thin very flexible separate wires to the PCB coming out of the motor and wire these to your PCB after having refit the motor and spindle. You need to do this as the PCB is on the wrong side.....
You may need to use force/heat and sweat to get the spindle off... Be careful not to buckle it. I have done one before....

I have also read of someone who repairs flex foils under a microscope with copper sheeting and solder.

WRT to the laser, best bet is to build a CDM9/44 laser head across onto the 9 pro block.

[dowser]

Hi Guillaume,

ANy more advice on sweating the platter off the spin motor spindle on a CDM9 Pro? I just picked up a non-functional Naim CDI - someone tried to prise the platter off, and it's now warped. I can get a new one made up - assuming I can get the old one off!

Thanks, Richard

[robo]

maybe it's not easy to find.
but in china,there are some CDM9PRO taken from CD-ROM,maybe can help.

[tubenut]

maybe it's not easy to find.but in china,there are some CDM9PRO taken from CD-ROM,maybe can help

That would be awesome, more info please!!!!

ANy more advice on sweating the platter off the spin motor spindle on a CDM9 Pro?

I used brute force.... Had nothing to loose, just used knives etc between spindle and mounting "block" gently moving around pushing little by little....

However, I am sure some glue is used. A little heat from a solder tip on to a shaft (this was on a tonearm not a CDM9) helps loosen things. I guess one could try solvents as well...

[oshifis]

Hallo rotelonik,

Here you can order a transport unit:

http://www.ersatzteil.justone-schnep...44_cdm944.html

[tubenut]

The CDM9/44 and CDM9 Pro are not identical, the laser optics can be interchanged but there are vast differences between motors, spindle and mounting block. This is on another thread somewhere. The Pro ref is CDM9/65 I think......

As Dowser needs a spindle the CDM9/44 is not likely to help. Different shaft diameters and ally vs plastic etc etc.

[dowser]

Thanks All - I do indeed need a CDM9 Pro mech for the spindle motor, not the laser. On the off chance anyone has one with a duff laser sitting about - I'll buy it!

I'm going to attempt brute force to get the spindle platter off so I can get another made up - motor bearings currently feel OK, amazing considering enough force has been applied to warp the platter! Whether they will still be after my effort remains to be seen.

Naim's CDI was normally fitted with a CDM4 Pro - when stocks ran out Naim swapped to the CDM9 Pro. Mine is one of the last and has the CDM9 transport.

If I cannot fix the current transport, I'll look for a 2nd hand Philips with a CDM4/19 (I think - still researching). This should come with the servo board which allows me to plug it back into the Naim audio/converter board. Fingers crossed. I can then patiently wait for a CDM9 Pro to come up with a faulty laser (has anyone heard sonic difference between the Pro versions and their brushless motors?). I really want to get it working; I love the engineering inside it (outside is ugly!) and assume it sounds pretty good as well (it has a double crown TDA1541!).

Photos;
Internals - you can just see double crown: http://richard-dowsett.fotopic.net/p40227959.html

Got scared when I saw these scratch marks: http://richard-dowsett.fotopic.net/p40227961.html

Confirmed fubar: http://richard-dowsett.fotopic.net/p40227960.html

Cheers, Richard
Edit to add: Pro reference for CDM9 Pro is CDM9/60. Anyone know the same for the CDM4 Pro? The CDM4/19 at least has a metal platter (which I need for the magnetic disc clamp used in the Naim).