Celestion A6S Search for a diagram or service manual

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Joined Mar 3, 2024
The subwoofer formally works, but when the level increases, an unpleasant, inadequate sound appears. These are definitely not speakers, I checked them on another device. No body vibration. The oscilloscope shows that the final stage does not have enough power. This subwoofer uses a tracking power circuit.
Maybe someone had one of these being repaired. If anyone has seen such a board, would you like to know if my photo matches the factory one? This device came to me after repair. I didn't see the original state.
Interested in the appearance of the inductor, marking of microcircuits - optocouplers and op-amp assemblies