Last night I noticed a strange reset on my Road Show. My Road Show doesn't reset during game. Prior to last night, I would have said it doesn't reset at all. It was basically an accident I ran into this.

It only resets if I power it on, quickly go to tests, and do "all lamp test". Lights barely turn on and it resets.

This happens about 50% of the time when I repeat the process (from cold start --- aka power off)

Interestingly, when it happens... if I let it reboot on it's own and go back into tests, it will typically reset again one more time when I do "all lamp test". But if I let it reboot and do it a 3rd time, it runs.

If I repeat the process and do individual lamps or the row/column, it never resets.

I'm wondering if 18v used for the lamps can't handle all lamps enabled until caps charge up? Maybe this really is a c6/c7 issue? (I think those are the two)

Again, never resets during gameplay or if I run the all lamp test a little later.

Oh, I have one of the RKAHR 5v product. I don't run with it normally, but I used it for debugging. It resets with it attached and the "low 5v" light doesn't come on...

Thoughts?

On a related note, I never noticed that C6 and C7 are in parallel. Since each is a 15,000 uF, this acts like a single 30,000 uF cap.

Also, I need to really see if my RS will reboot WITHOUT the KAHR device. In theory, this could be an odd situation where my "traditional driver board generated" 5V is strong but my 18V isn't that great and, because I've installed the KAHR (which uses the 18V to make the +5 itself), is causing the reset.

Just thinking outloud.

I suspect someone will find this interesting.

Tp8 (18v) shows over 2.6vac (max)

Tp3 (12v Reg) shows over 1.4vac (max)

Unless someone thinks otherwise, this seems to support my c6/c7 speculation.

Replaced c6/7. Realized that prior work didn't seem to have connected the + ends of c6/7 together.

Got it back in game, but had a hard stop. So I haven't been able to test!

Will test when back home.

All fixed.

Turned out that my 18v wasn't real solid. While this appeared to make no difference in stock config (no resets), it did cause the KAHR product the reset my RS.

With new caps the 12v Reg (which is generated from the 18v) never drops below 11v.