Metroid

Don't have another LCD to test with at the moment. I know the system is booting up because I can play notes over midi and upload hex files. I don't have a control surface yet either.

Hello all! I recently started trying to finish assembling my mb 6582 again, I've hit a snag, I've got the LCD hooked up, but all I get is backlight, no boxes, no ready screen, no nothing. I've been looking around here for about 3 hours now, I've reflowed all the solder connections at my lcd, and I've also reflowed the connections for the pins at the mainboard, I've also tried hooking up the LCD to other cores, when I do that I get absolutely nothing, I've adjusted the contrast and the brightness pots, but same problems. I also made sure that mios is installed as well as the midibox sid application. I'm really stumped on this one, hoping that someone else has run into something like this.

I've tested for voltage at all of those points and it isn't even getting past the plug when I turn it on, when I turn it on there is a huge voltage drop at 5 volts right at the plug. The 9vac is working just fine when I turn it on however. Currently I'm not using a heatsink on the voltage regulators for that exact reason, I wanted to make sure that I didn't cause any weird issues, I am using psu option b though. Also, I discovered that when I flip the mobo upside down I can connect to it and all of the voltages are correct now. I have uploaded the firmware and everything, played notes and it's working pretty well. I'm pretty sure it's one of the two major filtering caps that is causing the problem, but I've reflowed solder to the whole psu section and it's still having the same issue, it only works upside down, I really don't know what else to do, I've also reflowed solder to all of the plugs. Also, from playing it I've discovered a new issue. I'm using sidv2editor to play it currently as I don't have a control panel yet. When I play it I can't turn up the volume all the way, when I try to it gets really really quiet. It's happening on all of my 8580 sids, but it doesn't happen on my two 6581's... I'm super confused right now :S Any ideas? EDIT: I just figured out that it was a problem with the power cable from the commodore 64 that was causing it to not work when upside down, so I got that fixed. Now I plug it in and it works fine right side up. One time when I started it up I got correct volume from all of the sids, but I can't seem to replicate that event. It happened when I was jiggling around the power cable to get it to work. Right now the volume on my 6 8580s is quiet, and even more quiet on all left channels. Right channels are a bit better, but still bad. My 6581s are kind of loud, the volume almost works, but changing the volume fades between the two sids, so I can only have one channel loud at a time. There is also a ton of static in the background, way more than there should be, my 6581s sound quieter than my 8580s... The first issue seemed to be a power supply issue, so I think that the power supply may just be bad. It is supplying 5.26 volts after all, when it should be supplying right around 5.

Hello all, I'm a long time lurker, I read a lot, haven't really posted anything on here until now, but I'm stumped and I'm pretty noobie when it comes to electronics. I built a mb 6582. I've got the baseboard finished, or at least, all the parts are soldered on. When I turn the thing on, nothing works. I can hear the static of the sids getting power, but I can't upload the firmware or anything like that. I've been measuring some points around the baseboard, and I'm getting some weird results. At J1A when I measure voltages with the switch off, here's what I'm getting Pin 2 is reading 5.21 volts When I test AC, I get 9 volts ac. When I flip the switch, I'm getting Pin 2 2.3 volts Pins 1 and 4 9.9 volts When I measure for 5 volts anywhere else on the board it's giving me -.45 volts. That's at J3 as well as J4. Both 9 and 12 volts at J4 are testing at 7.09 volts each. J25 is giving me 12.49 volts. I have no clue what to do from here, I've disconnected all sids, didn't change anything. I've measured the voltage at V1 and on the input side of things I'm getting 13.42 volts, output I'm getting 10.38. Here's hoping somebody knows what they're doing, cause I sure don't! ~Chris