Question about Yamaha DSP-A3090 7-Channel Amplifier

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Shutoff itself within couple seconds.

Anyone knows what the reasonable cost to have this problem fixed? or anyway a novice like me can fix this by himself? thanks, Phillip

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  • le_phillip Jun 20, 2009

    This is the Yamaha DSP-A3090. shut off by itself within couple seconds.



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Liebert ap361

I'm an engineer and familiar with the innards of these things. My considered opinion is that I would not try what you are suggesting, which is a hot swap of the fan.

My reason is safety. Inside that unit are elements that generate 120V AC within a few thousands of a second of power loss. That can happen at any time. If you are in some random location up to your elbows, how will you know? Also, during this same interval, the unit is bypassing the AC generation and coupling AC to the internal outlets.

120V is sufficient to kill you if applied across the right points on your body at the right time.... say from hand to hand across your chest. Not worth the risk of a few minutes of downtime, especially for novices.

I'm not familiar with this specific UPS, but the standard method of doing this type of thing is shutting off the loads, removing the UPS, fixing it, re-installing it, and powering everything back up. If it's going to take HOURS and you need the machine, you can always power things up without a UPS OR you can borrow one for the moment. You should be comfortable with doing this sort of thing, anyway and practice is a good thing.

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