Extron Super Emotia GX Problems

[Phatnightmares]

Hey everyone,
I was hoping to get a bit of help with my Extron Super Emotia GX. I recently picked this up and wasn't aware that there was an issue with it.
For this demonstration I used my Dreamcast with the Toro VGA box outputting at 480p via VGA and my laptop outputting 1024x768 via VGA as well. Both were straight into the SEGX. I made sure all the cables used were properly tested with other consoles and can confirm that all the cables are in working order.

When I turn on my PVM while the SEGX is plugged in and outputting either Composite, S-Video or RGBS, the screen flickers faintly. When I turned on my Dreamcast, I got a very unstable image. The sync on my monitor was already on, so that couldn't have been the issue. I turned it on and off just to make sure. When outputting RGBS into my PVM, the only color that displayed on my PVM was green. When toggling the "RGBS"/"R-Y/B-Y" button, the colors would change randomly from Red, Green, Blue or sometimes no image at all. When I was outputting Composite or S-Video into my PVM, I would get more correct looking colors, but the image was still very distorted. Wiggling all the cables in the back did not seem to help the image stabilize either. Eventually, I switched over to my laptop. I got the same results I was getting with the Dreamcast. There's another button on the side that reads "Hi-Z/75 ohm", and when I press it out, the signal from my laptop isn't reading anymore. Flicking various switches on the SEGX doesn't do anything to fix the issue. The PSU that came with the SEGX seems to have incorrect voltage, from what I've seen here on these forums that it should be. I have the correct PSU voltage from another Super Emotia and can confirm that both PSUs give the same result.

Overall, I can't quite put my finger on the issue. Could this unit possibly need a cap replacement? Perhaps the wiring inside is loose? Maybe it's that "RGBS"/"R-Y/B-Y" button? I'm hoping this is something that can get fixed. It would be a real shame to see one of these be beyond repair.

[RGBplayer]

s rgbs does not support 480P, you should switch the Component and close ext sync

[Fudoh]

FYI: your power supply doesn't meet the SEGX specs: your does output +/-15V, while the GX asks for 12V. This *can* work, but it's a lot more and it can cause damage or behaviour as seen.

[Bratwurst]

s rgbs does not support 480P, you should switch the Component and close ext sync

480p is being fed into the Emotia, which is then feeding 240p to the monitor, as the non-interlaced switch is toggled.

[outerspacerules]

tl;dr: this is probably at least partially the impedance button you were fiddling with in the video.

I had a similar issue with my recently-acquired Super Emotia. I found your post while searching around for possible solutions. Mine didn't have the distorted picture yours has (horizontal sync issues? could be bad caps, maybe?), but with no active input attached to the Emotia I was seeing the same green flashes you had, and after powering inputs off the picture would slowly fade from dark green to black. Also, with impedance set to 75ohm (which you want for a TV) the picture was too green; with the button set to HI, the picture was super overdriven.

I put a scope on the inputs and was seeing ~0.7v pulses every 850ms on the green line at the BNC connector, but weirdly not if I tapped the underside of the board where RGB and returns are labeled, near the middle of the underside. No bulging caps or blown up transistors anywhere. I was gonna post some pictures to share with you, but in the midst of messing with stuff I accidentally pressed that impedance selection button down (like, towards the ground, not in or out) slightly, heard a small noise like something clicking into place, and suddenly the picture was perfect. I inspected the bottom of the switch for cold solder joints, but no luck. So that button is just mechanically weird, I guess. I expect at some point my problem will return, but at least now I know it's the impedance button.

Anyway, signed up for these boards just to let you know to dig into that button more.