update: I found two sorted components, will order and install. see how it goes
i am curious, what was shorted?
for the layer to layer connections, the best thing is to have the board put through one of those ovens the repair depots use for the nvidia chipsets that go intermittent
i no longer have access to one
these were the best way to do the repair without risk of damage to the board
THE PROBLEM IS, the roland service manual is sorely lacking, it givies you enough info to troubleshoot to the point where you would replace the board, not do a component level repair
Totally agree, I also have a degree in EE and circuit design and 9 times out of 10 it is slogging through the circuit and testing and diagnosing
Probably the best, most versatile piece of test equipment of the last 50 years was the Huntron Tracker (1000 or 2000)
it gave you the ability to go along a power supply buss and it could sense proximity to a dead short. (along with Many other capabilities. Kind of a curve tracer on steroids)
you could move along the 24 volt source and tell if you were getting closer or moving away from a short.
you could compare 2 transformers & find the one with shorted windings.
they still turn up on ebay from time totime.
could be the most useful piece of equipment you ever buy, if you have the patience to become familiar with it
