I picked up a IIGS advertised as working. As with most 25+ year items I like to recap at least the power supplies. I never turned the unit on myself before starting the recap due to the main filter cap having a puffy top. I got everything recapped with the lowest ESR Nichicon caps I could find at Mouser, along with the y2 Rifa just incase it felt like releasing a smoke screen. Also while desoldering several of the caps I got that unique fishy smell from several of them, so a recap at least was probably a good thing.
When finished, I connected to the IIGS for load, I am measuring the 5 volt voltages at +5.02, but I only get +11.52v for the 12 volt rail. I can't locate any adjustment pots on this supply at all. Do I need to be concerned with the low 12v supply? I am not really sure what uses 12v in this system. I do have an external 5.25 and 3.5 floppy, but other than that, plan to use a CFFA for a hard disk and a gglabs 4MB memory card with no other expansions. The power supply is 699-0126, Astec.
When finished, I connected to the IIGS for load, I am measuring the 5 volt voltages at +5.02, but I only get +11.52v for the 12 volt rail. I can't locate any adjustment pots on this supply at all. Do I need to be concerned with the low 12v supply? I am not really sure what uses 12v in this system. I do have an external 5.25 and 3.5 floppy, but other than that, plan to use a CFFA for a hard disk and a gglabs 4MB memory card with no other expansions. The power supply is 699-0126, Astec.