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Old 13th March 2003, 12:08 PM   #1
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Default Any docs for CDM4/31?

Does anyone know something about cdm4? i canīt find the doc in the net, is it DSA compatible? How to send commands to it? Itīs really cheap (7€) and for experiments i consider it better than using my CD PRO2 because of damage risk. What kind of connectors are on this unit?
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Old 13th March 2003, 12:18 PM   #2
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Hi Till, the picture is of a CDM2 if I'm correct. Can't answer your questons but can you obtain CDM4's ? If so I would be very happy to buy some ( 5 or 10 when possible ) because they are obsolete for years here. They are IMO one of the best transports ever made. They play CDR too ! I will send you a private mail about this, OK ?

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Old 13th March 2003, 03:53 PM   #3
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The connectors are typical Philips style connectors with a history of reliability
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Old 14th March 2003, 06:48 AM   #4
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I ordered a handfull of those CDM4/31 and we will see if they will work to build CDP with.
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Old 14th March 2003, 07:00 AM   #5
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Hi till,

If it's possible, I would like to buy at least 1 (one) of them!

Thanks in advance.

Audiofanatic
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Old 14th March 2003, 08:56 AM   #6
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Yup, looks like the CDM2.

It won't work standalone.
I've seen 'm in Philips CD360, CD460 and CD650.
I would not mind getting one though as a spare.
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Old 14th March 2003, 05:53 PM   #7
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jean-paul,

which cdm4 is the one thats prefered?


cdm4-31?
Click the image to open in full size.
Click the image to open in full size.


cdm4-d36?
Click the image to open in full size. Click the image to open in full size.


cdm4-19?


Click the image to open in full size.

/kasra
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Old 14th March 2003, 06:31 PM   #8
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It depends on what you want to do with it really. They all share the same laser as far as I know. For replacement purposes the CDM4/19 is most common. It is used in a lot of Philips/Marantz machines. Too bad that there is not much documentation to find on the web about these lasers / mechanics. They deserve better.

The cdm4-d36 looks best, it is the professional version as used in cd manufacturing test machines. Never seen one for real, only pics. Don't know anything more about that one.

CDM4/31 is to my knowledge a low budget version for HiFi sets but I could be wrong.
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Old 14th March 2003, 06:44 PM   #9
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Quote:
What's new?
The No.31.5's transport mechanism is mounted on the same sprung 12-lb lead-brick assembly as in the '31. However, whereas the No.31 used the Philips CDM 4 CD player mechanism, with its familiar swing-arm laser pickup, the '31.5 features Philips' new CDM 12 2x-speed industrial CD-ROM mechanism with a linear-tracking pickup and a digital servo. Because this is a CD-ROM drive, it won't by itself access the audio disc's subcode and index information. Madrigal therefore developed their own control software.
from
http://www.stereophile.com/showarchives.cgi?356

If you want a state of the art professional drive, iīm sure CD PRO2 is better. But at this price the CDM4/31 is a nice toy to play around with.
http://www.blackpudding.fsnet.co.uk/..._reference.htm
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Old 20th March 2003, 02:33 PM   #10
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I recived some of these CDM4/31.

The units seem to be unused, there is a plastic shield on the top to protect the laser. I canīt test it right now because i donīt know what kind of connector is on the PCB and what commands to control the CDP are needed.
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