View Full Version : Robotron2084 problem
cyberfluxor
09-13-2009, 07:11 PM
Earlier today I went to go turn on my Robotron2084 machine to get some gaming action on, but instead I was thrown a light/dark orange barred screen. So I turned off the power supply leading to the game boards and saw the monitor turn black or empty, basically as though it were not getting a signal from a video board. So I turned the power supply back on and pulled the machine from the wall and looked at the ROM board. I noticed that the digital counter wasn't lit up so I turned the PSU off and on again and spotted that the counter would light up for a blip and turn back off.
I am under the assumption that the power supply may be going bad or at least not providing the right power. I just wanted to check in here first and see if anyone else has opinions or ideas before I start digging around.
98PaceCar
09-13-2009, 08:31 PM
The 2 biggest issues with these are power supply and ram. If you don't already have a switcher in it, that's a good place to start. But be aware that you will occasionally lose settings and scores with a switcher (has to do with how the voltages come online).
Arcade Antics
09-13-2009, 09:02 PM
What he said.
Check all the fuses for continuity. If it's the original linear power supply, check the +5, -5, +12. If you're missing any of them, reflow all the solder on the connectors on the back of the PS board and go from there. Rebuild kits are inexpensive.
cyberfluxor
09-14-2009, 02:55 PM
Thanks, looking into it.
Peale
10-03-2009, 09:37 AM
How did it go? Did you get it fixed?
cyberfluxor
10-11-2009, 07:38 PM
How did it go? Did you get it fixed?
I checked the voltages comming from the PSU going to the boards and they all checked out fine. A few leads to the logic board are reading a little variance from the 5/12v requirements from the schematics. Then with the sound board there are three leads: -12v, +12v, and ground. According to the schematics the +/-12v leads were flip-flopped! But I hooked everything up and it's running again. I assume something was loose and reseeding the connectors from the PSU worked. Should I be bothered by the sound connection though, everything sounds fine.