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Old 31st May 2020
I have a Big in now and I'm seeing reccuring issues with the Analog Devices balanced output drivers, the SSM2142. The DC offset polarity is reversed on the inverting outputs so about 1/2 of the el blocking caps are installed backwards. That causes cap failure shown as a cap with a bulging top. The 12 channel buss pcb card has 1/2 of the replaced caps bad and have to be replaced, again.

Do check the dc offset polarity when replacing any el cap in these consoles, it will save you later headaches.