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On 8/25/2017 10:27 AM, Daniel Forró danforcz@... [YamahaDX] wrote:

?

On Aug 25, 2017, at 22:31, jojolp90@... [YamahaDX] <YamahaDX@...> wrote:

I guessed that looking at the 400V capacitor (why out such a large value if your PSU is only 110V) and confirming that with the page 30 of the service manual.

Maybe to have enough reserve for possible power spikes?

110V is really 120V in many countries 120V RMS is 170V peak; 340V p-p . if the capacitor cannot get discharged in time.? Probably to cover for UL/CSA/TUV/etc. safety requirements.