DS18 SMD-8500.1D amp no sound

Hello,
I have a problem with this amplifier. It powers on fine, doesn't go into protection mode, but there's no sound output.
I measured and noticed that there is no symmetrical power supply to the TL072, The rail voltage is at 190V.
Any idea where the problem could come from? Where are the regulators located?
Thanks.
 

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  • DS18 SMD 8500.1 a.jpg
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  • DS18 SMD 8500.1 c.jpg
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  • DS18 SMD 8500.1 d.jpg
    DS18 SMD 8500.1 d.jpg
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