CD-speler Beocenter 9300 (Toestel of techniek)

door Maurice , Dordrecht, 03-04-2015, 15:24 (3529 dagen geleden) @ ElektroNick

Ik had een link gestuurd met goed verhaal over de verschillen loopwerken

Lees dat nu nog maar eens goed door.
http://www.dutchaudioclassics.nl/CD-Pro2LF/

CD-Pro2LF cdmechanism
Using the CD-Pro2LF module (VAU1254/31LF), you will get a high-performance CD-engine, which is designed to deliver an extremely good playability and very low mechanical playing noise.

The CD-Pro2LF (LF stands for "Lead Free") is the RoHS compliant version of the CD-Pro2M. From now on, all electronic products must indeed comply to the RoHS directive, so that they can be sold in the European Community, as well as in many other countries world-wide.

The CD-Pro2M itself was an improved version of the CD-Pro2 module which had been widely used in the high-end audio industry, like its predecessor, the CD-Pro module.

Compared to the CD-Pro module, the CD-Pro2M had indeed brought many improvements, like the capability to read CD-RW discs. Its playability had also been improved thanks to the recent CD10 servo-decoder and a new active filter switching for start-up and play. In these matters, the CD-Pro2LF shows the same performances as the CD-Pro2M module. Besides, its firmware has been specifically updated to allow playback of most of the current copy-protected discs.

The CD-Pro2LF module remains fully compatible with its predecessors, and it can directly replace the CD-Pro, CD-Pro2 or CD-Pro2M in your existing application. Indeed, it has the same dimensions and fixation points, as well as the same electrical connections as these modules. Last but not least, all these modules are based on the same standard DSA protocol for external communication, which means they are also software compatible.

From Philips CDM12 Industrial to CD-Pro2LF ...

The Philips CDM12 Industrial was actually the first generation of professional modules to include a heavy die-cast metal frame. It rapidly met a big success in the audio/video industry.

Indeed, the Philips CDM12 Industrial module had a very successful life, particularly in two specialized markets : in the high-end audio market, because of its excellent ability to retrieve digital audio data and because its very good sound quality; in the jukebox market too, because of its robustness and reliability.

The CD-Pro and CD-Pro2 correspond to the next generations in terms of electronics. They are of course pin-to-pin compatible with the Philips CDM12 Industrial. The main difference lies in the type of decoding device which is used in the application : the Philips CDM12 Industrial (Premium 6000) includes the decoding chip SAA7345 (CD6) and the digital servo chip OQ8868 (DSICS). They are both replaced by the single chip SAA7372 (CD7) in the CD-Pro application (Premium 7000) and by the SAA7324 (CD10) in the CD-Pro2 application (Premium10501). The CD7 and CD10 show better performances, especially thanks to their improved error correction systems. Experience has also underlined that CD7 and CD10 are less sensitive to ESD.