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Vintage Synth Repair

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Re: Crumart Trilogy replacement power transformer

2011-06-21 by Boddington

Yes the Trilogy's transformer was blowing the fuse constantly, even without the PSU board attached. Once I tested the Stratus' secondaries and confirmed that it worked I checked out the PSU board to troubleshoot it. I sourced the problem to a dead tantalum cap for for the 7915. It's finally up and running.

The load on the Trilogy appears to be different though. It needs to produce several more outputs on those jumpers. I still don't know what the value is for the T63 but I suspected it would be at least 20 per winding when factoring in the wave rectification's RMS, etc.

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