JVC's K2 digital and mystery chip

Thread Starter

13hm13

Joined Jun 1, 2023
65
No sure what JVC might have been up to in the early '90s. Their K2 technology in cd players got some decent praise in HiFi News and Stereophile magazines.
Looking that that reference link of digital dutch insights ...
The complete d/a DAC converter list - DutchAudioClassics.nl
https://www.dutchaudioclassics.nl/the_complete_d_a_dac_converter_list/#J
... we can see some of what's goin' on ....
JVC XL-Z1050 (1992) decoder dsp --> JCE4300 [mystery chip] ->> YM3414 [digital filter] ->> JCE4501 [dac]
JVC XL-Z674 (1994) decoder dsp --> JCE4300 [mystery chip] ->> MN35502 [df+dac] -
The mystery chip, JCE4300, is placed right after the decoder chip.
The service manuals for various JVC cdp's only give very sketchy details about this 20-pin "Gate Array for K2 Interface". Obfuscation? Methinks it's a 74-style logic chip being used to re-clock the I2S lines. Typical practice. But, then again, it is a 20-pin device, maybe like: SN74AS804BN.
So ... Not sure what JVC is up to ... anyone care to guess?



Screenshot-at-2023-10-07-21-55-21.png

Screenshot-at-2023-10-07-21-56-02.png
Screenshot-at-2023-10-07-21-57-23.png

Screenshot-at-2023-10-07-21-58-27.png

Screenshot-at-2023-10-07-22-01-02.png

Some refs:

https://audio-database.com/VICTOR/player/xl-z531.html

https://www.hifiengine.com/manual-library.shtml

https://www.dutchaudioclassics.nl/the_complete_d_a_dac_converter_list/#J

http://vasiltech.narod.ru/files.htm

https://audio-database.com/VICTOR/player/xl-z999.html

https://www.audioservicemanuals.com/j/jvc/

http://www.lampizator.eu/lampizator...JVC K2 XL-Z1050 CD Player with XRCD dac.html

https://support.jvc.com/consumer/product.jsp?modelId=MODL008025&pathId=7&page=1&archive=true
 
Top