The crystal is connected across one end of the DAC chip, between pins 1 and 28. Go read the datasheet now and come back here afterward. Having the clock built into the DAC is potentially ideal but the clock in the 63 out of the box is known to be pretty jittery, obviously a product of mass-production in its execution, and those who've tried reclocking devices report tremendous gains, as you might expect after spending all that money.Īfter much hacking about with an old 63SE we think we've found a good reason why. The relevant components are the NPC DAC (soldered to the underside of the board), CD02, CD03 and the 16.9MHz crystal, XD01. The clock in the '63 is a simple Pierce-style oscillator implemented directly onboard the DAC chip using a dedicated logic gate. Willingness to pull the logic board and solder to surface mount devices.Ĭlick the image left for diagrams showing the underside of the PCB before and after modification.Sharp knife, steady hand, soldering iron.0.1uF or greater stacked foil polyester or X7R type ceramic capacitor (must be less than 1/8" thick) ![]() NPC SM5872B DAC datasheet, available here ![]() Having spent far too long playing with the guts of an old CD63SE we finally achieved something useful - so here it is for public consumption. Inveterate meddling #101: playing inside the Marantz CD63
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