there should be a trimpot in the psu for adjusting to the correct voltage of 5,5 volts. however in some cases there is no trimpot, but instead only some resistors where it should be. i had one like that once, and swapped out the resistors for a trimpot. do you have a trimpot in your psu ?
there is a good internet board for Emu stuff:
Med venlig hilsen
Kim G. Hansen
Redaktør, Radio24syv
On 24/02/2015, at 17.04, "NoëlBuhagiar laser@onvol.net [vintagesynthrepair]" <vintagesynthrepair@yahoogroups.com> wrote:
Hi... have been given an Emulator III with a removed SCSI drive but owner said it worked loading OS from floppy.When I checked it it did not work and LCD had black square characters. Checked all SMPS voltages and the +5V is low at 4.6V.E-mu did not repair or supply schematic for the power supply. Are E-mu still in operation? Anyone has been here, before I dig in the power supply?All caps seem to be ok although best to remove them to check to be sure.Any help please, thanks,cosmo