Change opamp in Rega Planet 2000

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I have just seen inside my REGA planet 2000. Nothing much in there. I'm planning to do some modifications. First I wan't to change the opamp. As far as I can understand the opamp used in the REGA ia a LA 9216. Probably from Sanyo.

Anyone know the quality of this opamp ?
Is it possible to change it ?
 
Rega Planet schematic and Sanyo LA9216 Datasheet wanted

The LA9216 isn't a typical op-amp (like quad op-amp TL074). There are additional several functions on board like logic section and voltage regulators. How great it is the similarity to the LA9215 ? - I don't know, because I don't find a datasheet online. Perhaps pin compatible, but an enhanced quality standart?
To understand the complete theory of this circuit operation, a full schematic so as original datasheet from Sanyo would be helpful. Who can help?

follow links I have found in this case:
http://www.primeaudio.co.kr/bbs/data/pds/REGA_PLANET.jpg
http://farm4.static.flickr.com/3251/2784025578_74994d7d24.jpg
Stereophile: Rega Planet CD player
Lecteur CD - Modifier un Rega Planet (1er génération) - Sources
hack the Planet!
http://www.diyaudio.com/forums/digital-source/15709-mod-rega-planet.html
LA9215 datasheet pdf datenblatt - Sanyo Semicon Device - CD player output amplifier ::: ALLDATASHEET :::
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.