GaryB;186354 Wrote: > Well it has been a long time since I poked around inside my SB3 but the > way you figure these things out is to check the chip datasheets and > then visually trace the wiring on the circuit board. Using a > multimeter to verify things are wired up the way one expects is > critical. You do this by measuring resistance with the SB3 turned off. > Thanks a lot Gary, the offer of a free alw superreg +board is open to you as well, since dave must not've wanted it (:P).
As soon as I had the multimeter in hand I realized the probes were far too big not to short things out, so I let it sit overnight before mucking around. I'm not positive, but it looks like the output for the regulator goes to a trace on a different layer. > Then you have a few options in terms of how to wire in new Vdd and Vcc > supplies. Easiest is to just remove the existing regulators and use > the pads for those regulators as the entry points for the new power > supplies. My main concern right now is whether replacing Vcc would get Vdd off the switcher as well, using a single superReg at U5. That brought up the question of whether they need to be on the same rail for startup reasons, which may be a silly question for all I know. I would rather use a second super regulator for the spdif out. I seem to remember reading a comment by sean about a chip in the clocking circuit that was easy to superregulate by lifting a pin and decoupling, so that may be my next project :-) -- Skunk ------------------------------------------------------------------------ Skunk's Profile: http://forums.slimdevices.com/member.php?userid=2685 View this thread: http://forums.slimdevices.com/showthread.php?t=19822 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
