Reply 60 of 76, by kvanderlaag
Tiido wrote on 2021-01-19, 21:34:
C46, 50 and 52 should be as high as you can find, I used 10µF. Bigger = better, less noise etc.
C45, 47 and 48 are 0.1µF but can also be 10µF or something else big. I took the parts from around CQM and its DAC stuff.
C41 I moved from C37, R13 from R9. This moves the CQM clock parts to OPL3L side, the MicroClock PLL generates the right stuff.
Bless you. I'm still waiting for another YMF289B-S and YAC516-E to arrive to get the CT3600 done, but when it does, I'll give it a shot.
In the meantime, I also have a CT2950 that I've tried to de-CQM, and while the CQM bits are removed and I've added components as shown in the posts above, FM sound isn't detected when poking 388h, and nothing plays back out of it in DIAGNOSE; I'm assuming maybe my solder job on the YMF289B-S was poor, since it's not detected at all, and the YAC516-E looks okay. Those fine pins are a pain in the ass. I'll have to give it another run of solder and see how it goes.