Need help: DSD-440 with unresponsive formatter/control board
jrw at lolqb.us
Tue Sep 20 14:02:47 CDT 2016
After reading this section, I should probably bring up that when I checked the PSU voltages, the 5v+ line was low, at 4.7v or so. I adjusted it back to 5.05v on the pot as defined in the manual, and there it stayed steady, but it didn't seem to help. Before I adjusted the pot, it was fluctuating.
---- On Tue, 20 Sep 2016 11:47:17 -0700 Jerry Weiss <jsw at ieee.org>wrote ----
On Sep 20, 2016, at 1:37 PM, Julian Wolfe <jrw at lolqb.us> wrote:
> Both green LEDs are on. They're ALL on.
As LED 9 is on (sorry for not being clear), then the CPU is active. That’s a good sign.
Definitely look at the DC Power up/down circuit first.
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