Mac128
Well-known member
So I have a few dead 128K logicboards which were at one time upgraded to 512K. Meaning, the RAM has all been upgraded and they were fitted with Mini-Mux boards at location E3. Somewhere along the way, somebody pulled all the mini-mux boards in a real hurry (who knows why) and sort of made a mess of the pads and traces.
Since this is all part of my experiment to run these boards fitted with 256 RAM chips, as 128K boards, all I need to do is repair the area at E3. My initial thought is all I need to do is to re-fill the holes with solder as on a stock board and it will take care of making the contacts between the pads and any inner layers they may have been attached to. Does this make any sense? Or do I need to do more?
Also, the trace between pin 1 & 2 has been cut on these boards. Is the only thing I need to do is solder across the cut to restore?
Since this is all part of my experiment to run these boards fitted with 256 RAM chips, as 128K boards, all I need to do is repair the area at E3. My initial thought is all I need to do is to re-fill the holes with solder as on a stock board and it will take care of making the contacts between the pads and any inner layers they may have been attached to. Does this make any sense? Or do I need to do more?
Also, the trace between pin 1 & 2 has been cut on these boards. Is the only thing I need to do is solder across the cut to restore?