Hi, I have been out of car audio for some years but now I am back in business and reinstalling my old alpine f1 setup onboard. I need some help since I'd like to improve my dha s680 charger with a low jitter clock and reclocking circuit. I'm sure this can be done, since years ago I listened to a modified 680 and it was something immeasurably better than the original.
I have some ideas but don't know if right, so ask your help!
I think the improvement involves IC8 and his 45,4 Mhz crystal (page 50 on attached service manual): replace the crystal with a low jitter one and dedicated 5 volt power supply. Then use the Digital output pin of IC8 (pin 55) for reclocking the digital audio signal.
Here the service manual ALPINE DHA-S680-P SM Service Manual free download, schematics, eeprom, repair info for electronics
I have some ideas but don't know if right, so ask your help!
I think the improvement involves IC8 and his 45,4 Mhz crystal (page 50 on attached service manual): replace the crystal with a low jitter one and dedicated 5 volt power supply. Then use the Digital output pin of IC8 (pin 55) for reclocking the digital audio signal.
Here the service manual ALPINE DHA-S680-P SM Service Manual free download, schematics, eeprom, repair info for electronics