Vintage Synth Repair

Hi.. yes there is a trim pot although I haven’t touched it yet
will have a look later at psu
I checked caps for ESR in circuit although could be they need to be out of cct.. I do not have schematic
thank you for your info re internet board and also your help
NoelBuhagiar









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:


http://www.eiiiforum.com


Med venlig hilsen


Kim G. Hansen
Redaktør, Radio24syv


On 24/02/2015, at 17.04, "NoëlBuhagiar laser@... [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