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.
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.
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.
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.
You are in trouble.......
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.
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.
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
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
if that' true
maybe it's not easy to find.
but in china,there are some CDM9PRO taken from CD-ROM,maybe can help.
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!!!!
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...
Hallo rotelonik,
Here you can order a transport unit:
http://www.ersatzteil.justone-schnepel.de/html/philips_cdm9_44_cdm944.html
Here you can order a transport unit:
http://www.ersatzteil.justone-schnepel.de/html/philips_cdm9_44_cdm944.html
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.
As Dowser needs a spindle the CDM9/44 is not likely to help. Different shaft diameters and ally vs plastic etc etc.
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).
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).
I am from china in guangzhou city.tubenut said:
here we can find some CDM lasers.including CDM3 and CDM9pro.both of tham are removed from old PHILIPS CDROM.just like CM201 OR CM206...an so on.but some CDM9/44 maye from car CD.
as i know,the part of laser from CDM9/44 can be used to replace the laser of CDM9PRO,just like the part of CDM4/19 can be used in CDM4/PRO.they are the same.but if your CDM9PRO's motor is broken,that you will have to find another CDM9PRO...for that can not find as easily as the part of laser.
good luck!
I managed to get the old platter off - trick is to lift the motor spindle off it's bearing base with a couple of screwdrivers under each side of the platter (has about .5mm upward play). Then a light tap on the end of the actual spindle breaks the (what looks like) superglue bond between the alu platter and the motor spindle.
I was suprised before that the motor bearings felt OK after the abuse it must have suffered when someone warped the platter, but you can see from below photo that the bearing is an over engineered lump of brass, it's fine! Also, the platter itself is thin aluminium; it wouldn't take much force to bend it (although the scrathes on the CDM9 chassis tell a different story!).
As the motor and shaft seem fine, I can only assume someone thought the spin motor was faulty and was trying to remove the platter to get at the screws. I'm guessing that means there a fault elsewhere; either laser or servo board problem - does anyone know if the Naim servo board used in the CDI with CDM9 mech also suffered from electrolytic problems? There's a couple on there, they look fine but...
So, what now - old platter is junk; I am unlikely to be able to get it true again. I can't get a new one manufactured, as it has the magnet in the middle of it. I wonder if any other Philips mechs use a similar platter? I can see some begging emails to Philips coming on!
Otherwise, CDM4/11 also has a metal spindle with magnet that I could fit to get it running I hope (motor is better than stock, but not as good as the 9 Pro item I guess) while I search a replacement CDM4 or 9 PRO mech.
Photo of the spindle motor removed; http://richard-dowsett.fotopic.net/p40254164.html
Richard
I was suprised before that the motor bearings felt OK after the abuse it must have suffered when someone warped the platter, but you can see from below photo that the bearing is an over engineered lump of brass, it's fine! Also, the platter itself is thin aluminium; it wouldn't take much force to bend it (although the scrathes on the CDM9 chassis tell a different story!).
As the motor and shaft seem fine, I can only assume someone thought the spin motor was faulty and was trying to remove the platter to get at the screws. I'm guessing that means there a fault elsewhere; either laser or servo board problem - does anyone know if the Naim servo board used in the CDI with CDM9 mech also suffered from electrolytic problems? There's a couple on there, they look fine but...
So, what now - old platter is junk; I am unlikely to be able to get it true again. I can't get a new one manufactured, as it has the magnet in the middle of it. I wonder if any other Philips mechs use a similar platter? I can see some begging emails to Philips coming on!
Otherwise, CDM4/11 also has a metal spindle with magnet that I could fit to get it running I hope (motor is better than stock, but not as good as the 9 Pro item I guess) while I search a replacement CDM4 or 9 PRO mech.
Photo of the spindle motor removed; http://richard-dowsett.fotopic.net/p40254164.html
Richard
Dowser, this is what I would try.
Buy a CDM9/44 as the laser optics can be built over on to the Pro.
I suspect that the reason someone thought the motor faulty is that CDM9 has a different start up sequence to other previous Philips and most other mechs. Where other mechs once closed spin up and try to focus to read TOC, the CDM9 focuses before spinning to read TOC…..
IOW, on an older mech that does not spin when engaging/closing the loader, one can suspect motor and associated electronics/connections.
However, a CDM9 with a dud laser does not achieve focus and then obviously does not spin up. Some (I did as well for months) will suspect a motor type fault….
The spare laser is good to have regardless. Check Donberg if you are in Ireland.... I have bought from them before. google CDM9 + Donberg.
The “platter” on the CDM9/44 is plastic and has a magnet and the platter is just a press fit and easy to remove. The 9/44 motor shaft is thicker or thinner then the pro (can not remember so you may need to ream the platter a little or build up the shaft). Be careful as any eccentricity of this hole will cause misreads at the end of discs where the “wobble” is worst…
This modified plastic platter would give you a “Semi Pro” CDM9 😉
The magnet is also easy to pull out of this plastic platter so you could use that in a newly machined platter unit secured with a wee superglue….
Older CDM platters like from CDM4 are thicker but even if the bottom collar is machined down I am not sure there would be enough clearance left for the motor screws….
If you can find someone able to machine a platter for you I may be interested in one. I may actually also have a 9/44 platter spare I could perhaps drop in the post but I am quite convinced your laser is a dud and you would get a platter with the 9/44 you will probably need to buy….
I doubt you could dump in another motor as I think the connections for the different hall motors are different. I.e., not flex foil etc etc.
Buy a CDM9/44 as the laser optics can be built over on to the Pro.
I suspect that the reason someone thought the motor faulty is that CDM9 has a different start up sequence to other previous Philips and most other mechs. Where other mechs once closed spin up and try to focus to read TOC, the CDM9 focuses before spinning to read TOC…..
IOW, on an older mech that does not spin when engaging/closing the loader, one can suspect motor and associated electronics/connections.
However, a CDM9 with a dud laser does not achieve focus and then obviously does not spin up. Some (I did as well for months) will suspect a motor type fault….
The spare laser is good to have regardless. Check Donberg if you are in Ireland.... I have bought from them before. google CDM9 + Donberg.
The “platter” on the CDM9/44 is plastic and has a magnet and the platter is just a press fit and easy to remove. The 9/44 motor shaft is thicker or thinner then the pro (can not remember so you may need to ream the platter a little or build up the shaft). Be careful as any eccentricity of this hole will cause misreads at the end of discs where the “wobble” is worst…
This modified plastic platter would give you a “Semi Pro” CDM9 😉
The magnet is also easy to pull out of this plastic platter so you could use that in a newly machined platter unit secured with a wee superglue….
Older CDM platters like from CDM4 are thicker but even if the bottom collar is machined down I am not sure there would be enough clearance left for the motor screws….
If you can find someone able to machine a platter for you I may be interested in one. I may actually also have a 9/44 platter spare I could perhaps drop in the post but I am quite convinced your laser is a dud and you would get a platter with the 9/44 you will probably need to buy….
I doubt you could dump in another motor as I think the connections for the different hall motors are different. I.e., not flex foil etc etc.
Cheers TubeNut,
I think you're right.
CDM9 Pro motor spindle is 2.5mm, I believe CDM9/44 is 2mm. I can therefore drill out the 9/44 spindle and transplant it and the laser into my mech.
Grandata currently looking cheapest for a CDM9/44.
Thanks, Richard
I think you're right.
CDM9 Pro motor spindle is 2.5mm, I believe CDM9/44 is 2mm. I can therefore drill out the 9/44 spindle and transplant it and the laser into my mech.
Grandata currently looking cheapest for a CDM9/44.
Thanks, Richard
Hi there all,
I saw your msg about CDM4/19 and CDM9.
I think i can get some new CDM4 and CDM9.
I will ask if they are still there.
I don't know what the price will but i guess around the 70 euro for the CDM9 and around 100 euro for the CDM4.
I will let you know when i know more about it.
I saw your msg about CDM4/19 and CDM9.
I think i can get some new CDM4 and CDM9.
I will ask if they are still there.
I don't know what the price will but i guess around the 70 euro for the CDM9 and around 100 euro for the CDM4.
I will let you know when i know more about it.
Thanks.
I've now ordered a CDM9/44 to use as the basis for my renovation, along with a bunch of tantalum caps to replace too.
Didn't go for the cheapest supplier due to concerns about them being original equipment. Donberg "pull" units are (according to them) original Philips, but I bought from a UK audio company who have checked laser power of similar pull units.
I also heard that Naim UK provided a new CDM9 Pro to an NZ user a few months back - am trying to find cost, but assume excessive! I paid around €75 including the tants.
Richard
I've now ordered a CDM9/44 to use as the basis for my renovation, along with a bunch of tantalum caps to replace too.
Didn't go for the cheapest supplier due to concerns about them being original equipment. Donberg "pull" units are (according to them) original Philips, but I bought from a UK audio company who have checked laser power of similar pull units.
I also heard that Naim UK provided a new CDM9 Pro to an NZ user a few months back - am trying to find cost, but assume excessive! I paid around €75 including the tants.
Richard
I now have a working CDI, and very nice it sounds too
Many thanks to Les at Avondale Audio - he offered to attempt repair of the mech if I returned it to him. Having already spent €210 on a broken CDI, I wanted to keep costs down - he gave me advice on best way of approaching it, having more interest in seeing the player revived than making money, and provided a tested CDM9/44 mech to use as a base at a good price.
Photos below; quite a simple task; took the platter off the old mech, drilled out to correct size and remounted on the CDM9 Pro spindle motor (taking great care to ensure height was correct). Then transferred laser and fitted everything back together.
Sound is good in the mid, bringing out stuff I never heard before and giving a great space around sounds - of course it's foot-tap'ability is impeccable. Still have reservations at high frequencies, but it has only been on for a few hours so far. Very happy - not quite the bargain I had hoped for, but under £200 for a CDI with a known good laser is still not bad.
Now I need to fix the CDP-X707ES and sell it - sound is detailled but uninvolving, and such is the internal engineering that I can't bring myself to modify it!
Richard
Photos;
CDM9 Pro and CDM9/44 side by side;
http://richard-dowsett.fotopic.net/p40649607.html
CDM9/44 platter off (used 2 knives, "pop" and caught it on it's way down )
http://richard-dowsett.fotopic.net/p40649606.html
Spacers to ensure correct platter height (measured off CDM9/44);
http://richard-dowsett.fotopic.net/p40649604.html
Platter mounted on CDM9 Pro (drop of superglue);
http://richard-dowsett.fotopic.net/p40649602.html
New platter and laser mounted in CDM9 Pro mech;
http://richard-dowsett.fotopic.net/p40649597.html
http://richard-dowsett.fotopic.net/p40649609.html
With light shield in place;
http://richard-dowsett.fotopic.net/p40649611.html
Many thanks to Les at Avondale Audio - he offered to attempt repair of the mech if I returned it to him. Having already spent €210 on a broken CDI, I wanted to keep costs down - he gave me advice on best way of approaching it, having more interest in seeing the player revived than making money, and provided a tested CDM9/44 mech to use as a base at a good price.
Photos below; quite a simple task; took the platter off the old mech, drilled out to correct size and remounted on the CDM9 Pro spindle motor (taking great care to ensure height was correct). Then transferred laser and fitted everything back together.
Sound is good in the mid, bringing out stuff I never heard before and giving a great space around sounds - of course it's foot-tap'ability is impeccable. Still have reservations at high frequencies, but it has only been on for a few hours so far. Very happy - not quite the bargain I had hoped for, but under £200 for a CDI with a known good laser is still not bad.
Now I need to fix the CDP-X707ES and sell it - sound is detailled but uninvolving, and such is the internal engineering that I can't bring myself to modify it!
Richard
Photos;
CDM9 Pro and CDM9/44 side by side;
http://richard-dowsett.fotopic.net/p40649607.html
CDM9/44 platter off (used 2 knives, "pop" and caught it on it's way down )
http://richard-dowsett.fotopic.net/p40649606.html
Spacers to ensure correct platter height (measured off CDM9/44);
http://richard-dowsett.fotopic.net/p40649604.html
Platter mounted on CDM9 Pro (drop of superglue);
http://richard-dowsett.fotopic.net/p40649602.html
New platter and laser mounted in CDM9 Pro mech;
http://richard-dowsett.fotopic.net/p40649597.html
http://richard-dowsett.fotopic.net/p40649609.html
With light shield in place;
http://richard-dowsett.fotopic.net/p40649611.html
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