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tiefbassuebertr 1st August 2009 10:30 PM

VAM1204 VAM1205 VAM1206 VAM1250 VAM1252 VAM1254 CDM12pro VAU1254=CDM12.4 compatib
VAM1204 VAM1205 VAM1206 VAM1250 VAL1250 VAE1250 VAM1252 VAM1254 CDM12pro VAU1254 = CDM12.4 compatible - Which VAM laser head (optical pick up) successor is compatible to Philips "CDM 12.4" ?

Between CDM12.1 laser head and VAM1201/VAM1202 laserhead there are compability although hologram laser diodes of different outline to be used. CDM12.1 use TO-outline, while VAM1201 use resin package.
In opposite to this one the complete mechanism isn't compatible through different behavior by the magnetic properties of turntable (disc motor pulley) There are only a 3 transistor APC unit (autom. power control) included, both CDM12.1 and VAM1201 laser head

Now to the actual topic concerning the CDM12.4 head
There are TDA1302 on board of the optical pickup (APC+RF amplifier)
In the last time (since arround a year) I note an increasingly poor quality, so that I need other solution for successful service and repair by older high quality cd players - e. g. Naim Audio, Meridian, Primare, NAD,Thule Audio, TAG McLarren, Classč and some other brands with CDM12.4 inside.
But I am confused regarded the interchange between the compatibility of CDM12.4 and VAM-Versions

by URLs and so as

I find only broken but not complete informations. By other places I find additional fragments of informations so as some datasheets and photos. Follow informations I have found on the web:

1) CDM12.4 without brushless disc motor (hall motor) no detailled datasheet

2) VAM 1204: without brushless disc motor (hall motor) no detailled datasheet

3) VAM 1205 with brushless disc motor short form datasheet:
inside in NAIM CDX NAIM CDS II MERIDIAN 508.24 (VAM1205 im Meridian 508)

4) CDM12.5 unknown, no detailled datasheet

5) VAM 1206 unknown, no detailled datasheet

6) VAM 1250 both with brushless disc motor (hall motor) and normal DC motor, datasheet VAM1250/21 Nov. 2002: (deleted schema page 18)
http://www.ersatzteil.justone-schnep...0_vae1250.html (Loader VAL1250)
http://www.ersatzteil.justone-schnep...ereinheit.html (VAM1250 head) (VAM1250, dhort form data) (VAM1250 in use by Naim CDS3)

7) VAM 1252 with brushless disc motor (hall motor) no datasheet sketch, schortform data, really same as CDM12 - CD-PRO? The CDM12 CD-PRO (VAM1252) diy project incl schem (Marantz CD7 CD 7 service manual)

8) VAM1254 CDMpro2M CDpro2LF
VAU1254/01 version August 2000 Hologram LTOH30PA + RF-amp TRIGINTA, datasheet August 2000: (schema page 24)
VAM1254/11 with brushless disc motor (hall motor) datasheet August 2000 and Nov. 2003 (several PDF downloads, also newer datasheet from November 2003 with Sharp GH6C005B3BA + RF amp TZA1022 )

9) Miscellanous
"There is a huge difference between VAM1252/00 and VAM1254/01.
Different chip (CD-7 laser uses TDA1302T) and pin config of flatcable is different".
CDM1210 = VAM1205 but not CDM12.10 and not CDM12.1 !!! (replace VAM1204 through VAM1205) Vam 1205/1250 CDM 12.5 Naim CD5 VAM1205 or CDM 12.5 fro Meridian 506 How To Convert VAM1204 To VAM1205? VAM1205 (Naim CDX) Problems describtion "The CDM12 CD-PRO (VAM1252) Project" describtion of components NAD S500 - CDM12.4 (VAM1202+1250)
CDM-VAM informations in foreign languages (Polish, Thai, Chinese) and very nice photos) Detailed description concerning the quality (dissass'y hologram-laser) (photos diy cd player)

tiefbassuebertr 1st August 2009 10:31 PM

Which VAM laser head (optical pick up) successor is compatible to Philips "CDM 12.4" ? - continued

10) sellers (delivery sources) of laser heads (optical pick up) VAM1205, only head, 111,20 US-Dollar
VAM1250 head 93,90 Euro
CDMPro2 optical pick up ***'y 79,95 US-Dollar
CDM12 CDM-Pro optical pick up ***'y 49,95 US-Dollar
CDM12.4 Head between 7,80 Euro and 15 Euro
CDM12.4 Head 18,99 Euro
CDM12.4 Head 30,50 US-Dollar
CDM12.4 Head 17,45 US-Dollar

11) sellers (delivery sources) of complete mechanism and diy kits
CD-PRO2M/LF = 289 Euro
CDM1210 = VAM1205 but not CDM12.10 and not CDM12.1 !!! incl. mechanism 35,90 Euro (wholesaler) CD-PRO2LF 232,-- Euro Nico Thevissen Nico Thevissen (smartech - Manager of VCD-pickup) (only complete diy kits with CDM12)
http://www.akustik-perfekt.homepage....ayer_dacs.html diy kits diy kits diy kits diy kits diy kits diy kit diy kits

12) NSM jukebox cd players
different images of CDM12IND, VAU1252/10 (CDMpro) und VAU1254/11 (CDMpro2)
also of interest to order for high end audio Jukebox CD Players CDM12 - CDMpro - CDMpro2 replacement parts of CDM12 - CDMpro - CDMpro2 service overview

13) Examples of CD player models, there are CDM12.4 inside:
Thule Audio CD150B
TagMcLarren CDT20, CD20
NAD S500
T+A CD1210R
Cyrus dAD1 dAD3
Sonic Fronties SFT-1

14) datasheets of Sharp hologram laser diodes:
Sharp LTOH12M datasheet (cdm-9) (10pol TO-outline, metal, CD+CDR)
LT0H33P (Mini Disc)
Sharp GH6C005B
Sharp LT0H30PA, LT0H30PB, LT0H30PC (mentioned in US patent 5511059) (please fill in 5511059 before download)
LT0H43M (CD-ROM to x16 speed)
GH6C005B5A/B GH6C005B Ser. for Philips (CD CDR and CD-RW compatible, use in CD713)

In this case I have only four questions:
1) Are there compatible optical pick-up's to this one of CDM12.4?
2) What is the main reason of the huge price difference between the laser heads of VAM and CDM12.4 - could it be the different quality standart of the hologram laser diode?
3) The original manufacturer of the hologram laser diodes was Sharp Semiconductor. Now there are no longer available and supported. Which brand name produces currently this hologram diodes (daisylaser don't know this - because he is only wholesaler - also VCD-pickup and Three Sixty) ?
4) Where I can find/order a detailled datasheet of hologram LT0H30PA or their successor from todays production?

Thank you very much for your advices.

anatech 2nd August 2009 03:17 AM

Hi tiefbassuebertr,
All the Philips mechanisms and possibly heads are offered with options, so you end up with a ton of part numbers - and they can be completely different.

One thing is cetain though. Once Philips started manufacturing in China, the quality control became non-existant. I do use the VAM1202 both in a complete transport, and as a subassembly. The quality ranges from non-working to working okay, but never really good. The VAM1202 is different than the CDM12.x.

Chasing down specs for the actual laser diode will be unhelpful. Sharp sold these as a large OEM order for an industrial customer. They were not available for individual sale to the best of my knowledge. Not only that, but the quality ranges pretty far up and down the scale. It's possible the laser diode can be supplied as die, in which case you can forget messing around with them. I've never wasted the time to crack one open. Suffice to say that many manufacturers of CD product has either ditched Philips or are scrambling for another OEM.

If you want to pursue this, go ahead and search. If you are attempting to repair a head, I think you are wasting your time. Don't forget the alignment for the optics, then calibrating the laser power sensing diode.


Stones 3rd August 2009 03:21 AM

Don't use the pinvan guys for CD Pro parts or repair, I had the worst experience I have ever had the misfortune to encounter, one issue after another with these guys. And no end resolution:smash:

Apogee 10th August 2009 02:09 AM

Philips VAM1202/12

I would love a list of units that the VAM1202 mechanism was used in.

My thinking is perhaps it might be possible to order direct from Marantz or some other vendor and still be able to get an original module that is new.

I have a beautiful Esound E5 that I love the sound of. Unfortunately, it no longer works, and the two past laser assemblies that I installed in it were "rebuilt" even though they were sold to me as new.

I'd love to get the unit working properly again.

I've also considered attempting to swap in a different transport assembly VAM 1250 perhaps?) but don't know if there are any that are compatible...

And yes, I did contact the original manufacturer (Cattylink) and they don't support anything that is out of warranty. VERY disappointing!

Also contacted Daisy Laser and they are able to get them, but I would have to order in quantities of 100 minimum...

Any help would be much appreciated!



PS - A message to Philips - Fire all of the bloody accountants that are running the company into the ground!!!!

anatech 10th August 2009 03:07 AM

Hi Steve,
This is a good opportunity to mention that failure rates for VAM 1202 are really high. The odds of getting working one are slightly better than 50:50.

A rebuild makes no sense, it would have to go back to China, and they only ship out, not in. What you got must have been a "pull" from another unit. It was likely in for the same reason. I do understand why the manufacturer does not want to get involved in this. They can't win and they will lose money on this. It would be better (and less expensive for them) to simply ship two for every order of one.

Information on these transports is difficult to find. We don't normally get any information at all.


tiefbassuebertr 10th August 2009 07:47 AM

Hallo Steve, is your player the same as this by the follow images:

Then - so I think - you have Loader L1210 in use (to read on white sticker) and you need for a good optical pick up with fine function one of this player in good condition:
Philips CD713, CD723 or CD753 - e. g. ebay Item number: 110422033129

tiefbassuebertr 10th August 2009 07:58 AM


Originally posted by Stones
Don't use the pinvan guys for CD Pro parts or repair, I had the worst experience I have ever had the misfortune to encounter, one issue after another with these guys. And no end resolution:smash:
"The pinvan guys" - a new keyword, even by google. If I put in thos one there, only this thread comes as proposal. Also my english isn't perfect.

What means "pinvan guys" ?

tiefbassuebertr 12th January 2010 07:24 PM

at my last post (post #8) about the weblink
you will find interesting informations regarded different quality standarts of laser tubes (hologram laser diodes)

tiefbassuebertr 9th March 2010 03:33 PM

The question of compatibility from the above mentioned mechanism types to the CDM12.4 isn't longer important for me, because I replace in the last time always the hologram laser diode (LDGU) itself. Instructions with some pictures you will find there:

Instead of this I want to know the currently producer of Sharp's hologram laser tubes in both TO and RESIN COMPACT outline - go to

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