CDM9 Pro

[ulle]

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!

[tiefbassuebertr]

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.datasheetcatalog.org/data...rp/mXqxuqy.pdf
http://www.freepatentsonline.com/5511059.pdf
about
http://www.partmate.com/download/OPU/CDM9.pdf and
http://blog.sina.com.cn/s/blog_4a65750301008bfe.html
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
EMT 982 PROFESSIONAL TDA1547 (DAC7) 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 DCM-9PRO CDM 9 pro PCM63
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.

[sybaritej]

There is one on ebay.com right now.

[ulle]

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!

:-)

[carlssonkid]

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

[ulle]

Hi!
The company is Riedservice in Stuttgart.

www.riedservice.de

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!

[gofasthobby]

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.