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Section Ensoniq
back to Ensoniq heaven

 
Replacement Area 
Trying to reach me?
Some of the parts of our (E)SQs aren't available anymore. This makes repair real fun since you have sometimes to tweak around things to "emulate" those unavailable parts.

I've not tested all of the below hints on the SQ80, some of them are even completely untested but should work pretty well, since I derived the circuitry from some other schematics or application note.

Sad but true... These days one really calls for spam when publishing an email address on a website. But what the heck.

rainer@buchty.net

If you expect an answer please send plain text emails. HTML-formatted mails will be dumped automatically.


 
PSU-Failure: The LM2925 Voltage Regulator

Ensoniq decided to use a combined 5V regulator / reset generator. Back in 1988 this was no problem since the LM2925 was easy to get, but nowadays its almost impossible to get one of these beasts. Fortunately, there's no magic inside this one and it could be easily replaced - so here's the schematics:

LM2925 Replacement
LM2925 Replacement Circuitry

 

 
 
Replacing the internal disk drive

Soon to come - for those who can't await click here (same disk interface but different machine :)