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Repair of Hafler DH-500

I decided to see if I could repair an old Haflter DH-500 that went south about 15 years ago - I believe I shorted the outputs. I have an oscilloscope (new purchase off of Ebay), digital multimeter and a digital LCR meter and I built an Octopus tester.
The unit powers up and I think I have isolated the problem to the left channel. I checked the MOSFET's and the P set (2SJ56) are definitely shot on the left channel but it looks like the N set (2SK176) are intact. Is that possible? or am I deluded? I found some problems on the PC-19 boards but these are minor and easily fixed but getting a hold of the MOSFET's can get pricey and I am don't want get in over my head with replacing the P set, blowing them up and then replacing both the P and N. Advice appreciated.



"Our head is round in order to allow our thoughts to change direction." Francis Picabia


Edits: 05/16/14
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Topic - Repair of Hafler DH-500 - neolith 14:54:50 05/16/14 (10)
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