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Old 21st January 2011, 07:43 AM   #1
ulle is offline ulle  Norway
diyAudio Member
Join Date: Dec 2010
Exclamation CDM9 Pro

Hi, everybody!
I`m new here and need some help for troubleshooting. Have a Micromega Trio transport with CDM9 Pro. Was sent for upgrade and came home with broken ribbon/flex cables for both laser and motor. This happend during transport. Packing can never be good enough.....

I understood early on that getting spares for CDM9 Pro was difficult, expect for laser that can be swapped for the regular CDM9. After some exctensive searching on the web I got in contact with a german company selling new ones. Got hold of one within a week. Great

Well great until assembly was ready and this happend: When I put powercord in the player the motor starts spinning at once and won`t stop. The on/off button does not react. When I put laser cable in/out of PCB contact the speed increase/decrease but does not stop anyway. After some fumbling around it suddenly operated 100% for 15 minutes and then failed again. I don`t know how these mechanisms really work and what "triggers" this behavior?
Lasers actually come in 6 different types marked 1-6. There are industrial type, CD types, Cd rom. CDM9 have nr.2 while original Pro has 4. Well mine is 6 which is the first I have seen..........

Any suggestions were to look. Laser? motor? power supply? adjustments?

Tips is most welcome!
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Old 22nd January 2011, 09:33 PM   #2
tiefbassuebertr is offline tiefbassuebertr  Germany
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Join Date: Jul 2005
Location: D-55629 Schwarzerden
Both CDM9 (normal motor) and CDM9pro (brushless motor) was the first mechanism, where is in use a so called LDGU (hologram laser diode) from Sharp instead a normal laser diode. The reliability of this diode is significantly worse than by normal laser diode. What you have described is exactly the same fact, that I observe, if there is a bad LDGU by my service work.
here is the datasheet and patent of this special device
http://www.partmate.com/download/OPU/CDM9.pdf and
you will find a picture serie (photo galerie) of a disass'y procedure of CDM9 and the internal schematic of the LDGU.
text unfortunately only in japanese.

Here the cd player models, where CDM9pro is in use
AUDIOLAB 8000 CDM Transport CDM-9 Pro
BURMEISTER 979 Transport CDM-9 Pro
Forsell Air Reference Air Bearing Transport CDM-9 Pro
JADIS JD-1 Transport CDM-9 Pro
KRELL KPS 20i 4 x PCM63P-K – Motorola XC56002F CDM-9 Pro ( CDM-9/60 )
MARANTZ CD-23 2 x TDA1547 (DAC7) CDM-9 Pro
PHILIPS LHH-100 CDM9 pro TDA1547
ROTEL RCD-990 CDM-9 Pro 2 x PCM63P ? PMD100
T+A CD1400AC SM5864 CDM-9 Pro
THETA DATA BASIC CDM-9 Pro It's a Transport
T+A CD1400AC CDM-9 Pro SM5864

Ask by one of this companies for parts and additional support.

Last edited by tiefbassuebertr; 22nd January 2011 at 09:56 PM.
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Old 1st February 2011, 02:11 PM   #3
sybaritej is offline sybaritej
diyAudio Member
Join Date: Feb 2011
Default CDM9 Pro

There is one on ebay.com right now.
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Old 3rd February 2011, 04:38 PM   #4
ulle is offline ulle  Norway
diyAudio Member
Join Date: Dec 2010
Well, problem lost!

A lot of frustration, but there had to be something wrong with the powersupply and it turned out to be the powercord it self. The Micromega has a 9 pin cord and one pin was loose in one of the connectors.

Solution was so close, but yet so far away..........

Thank you for tips and help!

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Old 13th February 2011, 04:13 PM   #5
carlssonkid is offline carlssonkid
diyAudio Member
Join Date: Nov 2010
Hi ulle
do you have the details of the german company that you got the cdm-9 pro from?
I have a dead Micromega that needs one

Thanks C
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Old 15th February 2011, 05:53 PM   #6
ulle is offline ulle  Norway
diyAudio Member
Join Date: Dec 2010
The company is Riedservice in Stuttgart.


Good service and quick to answer. If you don`t live in Germany you have to make prepayment, but no need to worry. It is a serious company and they communicate well. Tracking number etc.

When you assemble the new drive take care of the flexicable and don`t do anything in a hurry. Cables are very fragile under pressure.

Good luck!
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Old 14th February 2012, 03:08 AM   #7
gofasthobby is offline gofasthobby  United States
diyAudio Member
Join Date: Apr 2007
Hello, I'm new here, and in a similar boat.

I shipped a Micromega transport, and it arrived with a torn foil to the motor part of the CDM 9 Pro. So, I'm looking for a dead CDM9 Pro laser with a good motor section.

Does anyone know the part number to the motor, or what other applications it might have been used in?

Thanks, Samir.
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Old 3rd April 2013, 10:26 PM   #8
Michel is offline Michel  Canada
diyAudio Member
Join Date: Nov 2004
Location: L'Assomption, QC
Hello all,

I know it is a late reply but, if anyone is looking for CDM-9 Pro brushless motors.
I do have some in my possession.


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Old 4th April 2013, 08:36 PM   #9
ulle is offline ulle  Norway
diyAudio Member
Join Date: Dec 2010
Could be interested. Is these motor new or used? Price? :-)
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Old 4th April 2013, 08:54 PM   #10
Michel is offline Michel  Canada
diyAudio Member
Join Date: Nov 2004
Location: L'Assomption, QC
Hello ulle,

I have had those for so long that I don't even remember where they come from.
I know I took them off from CDM-9/46 drives to install DC motors so there is a good chance they could be new.
They look really clean so I wish I had an easy way to test them.
A fellow not far from me is in the process of buying one so I should know soon enough if there is a problem.
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