Vintage Synth Repair

I replied to this on the p2k board; suspect the opto-isolator, a tiny six-legged IC right close to the midi in socket. never had one fail on an emu, but I've seen the same device type fail on other gear. could've been static, or just age. 

they're usually an LED & a phototransistor; the idea is (ironically, depending on your sense of irony...) to protect & isolate the delicate innards of y'r synth from whatever's coming down the cable. I'd go there first. google the device for its pinout, then see if data is making it across the airgap inside it. if not, time for a new one. they are not expensive.

hth-
duncan. 

--- In vintagesynthrepair@yahoogroups.com, Dave Garfield <daveogarf@...> wrote:
>
> Hi, group!
> 
> My VK+ will not play from the MIDI In anymore.  A diagnostic sez that the 
> problem's in the MIDI section, and a check of the MASTER settings shows that it 
> *should* be receiving - everything's enabled, in OMNI mode, etc.
> 
> Am I missing something?  Does anyone know if this is a recurrant problem w/ E-Mu 
> rackmount modules?  Have I looked in the wrong place?  Any suggestions as to 
> where to look now?
> 
> THANKS in advance for your help.  I'd love to be able to sort this out myself, 
> but if needs be, it'll go to a tech.  (Any good techs in the Denver area?)
> 
> Gratefully,
> Dave Garfield
>