Vintage Synth Repair

thanks for your time and help

temperemental instrument??!!... will check that out.. LOL

NoelBuhagiar

i wrote that it should be trimmed to 5,5 volts. that was from memory and it was not quite correct: it shiuld be 5,05 volts. not much, but it can make a difference in this temperemental instrument

Med venlig hilsen

Kim G. Hansen

Redaktør, Radio24syv

On 05/03/2015, at 22.41, "NoëlBuhagiar laser@onvol.net [vintagesynthrepair]" <vintagesynthrepair@yahoogroups.com> wrote:

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@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