jonathan1138
Active member
Ok - Bit of a mess here.... Need assistance / direction please on this Robotron Mini.
When i got the machine, CMOS error which was not saving settings... sent the board out for repair, just got it back. In the meantime, needed a new monitor - so, during the wait put in a 13 inch WG.
Installed the new boards, along with running that monitor (leads into Iso Transformer / wire this up to the Power supply). The game does not have original Power supply - it has this updated power supply in place.
Turn on the game, see the boards are not getting their juice. There is a Pot on the powersupply that allows me to adjust up to 5 volts. Turn that Pot. Now i have concerns.
I get "Rom ERROR 32" and constant reset, Which, i see can be related to either bad chip (i should swap) OR not getting proper power.
In addition to that, the monitor shows only during an exact mid point of the pot - if i turn that pot to give the boards more power, the picture leans torwards distortion with lots of purple (garbage). Also, the monitor always has this purple line down the center that i dont know how to get rid of...even when at the mid point of the 5 volt pot on the powersupply.
So, some Questions that will hopefully lead to resolve (seems far off!):
1. Could i have damaged the boards (Roms) by adjusting that Pot for voltage? Over volt?
2. Something feels out of place - why is the monitor adjusting the pic when i give it more volts (again, the picture gets more purple when i feed it more volts on the supplies pot). I am guessing the relationship of the power supply voltage is increasing the CPU boards screen output (nothing really to do with the monitor, if that makes sense).
3. How would i remove that line in the center?
Could it be/ does it sound like i have this wired up completely wrong?
Thanks.
When i got the machine, CMOS error which was not saving settings... sent the board out for repair, just got it back. In the meantime, needed a new monitor - so, during the wait put in a 13 inch WG.
Installed the new boards, along with running that monitor (leads into Iso Transformer / wire this up to the Power supply). The game does not have original Power supply - it has this updated power supply in place.
Turn on the game, see the boards are not getting their juice. There is a Pot on the powersupply that allows me to adjust up to 5 volts. Turn that Pot. Now i have concerns.
I get "Rom ERROR 32" and constant reset, Which, i see can be related to either bad chip (i should swap) OR not getting proper power.
In addition to that, the monitor shows only during an exact mid point of the pot - if i turn that pot to give the boards more power, the picture leans torwards distortion with lots of purple (garbage). Also, the monitor always has this purple line down the center that i dont know how to get rid of...even when at the mid point of the 5 volt pot on the powersupply.
So, some Questions that will hopefully lead to resolve (seems far off!):
1. Could i have damaged the boards (Roms) by adjusting that Pot for voltage? Over volt?
2. Something feels out of place - why is the monitor adjusting the pic when i give it more volts (again, the picture gets more purple when i feed it more volts on the supplies pot). I am guessing the relationship of the power supply voltage is increasing the CPU boards screen output (nothing really to do with the monitor, if that makes sense).
3. How would i remove that line in the center?
Could it be/ does it sound like i have this wired up completely wrong?
Thanks.
