SONY SS- BX9 Opening the cover of the speaker system

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"To disassemble the Sony SS-BX9, you must first cut the eleven melted-connection points with cutting pliers, and then remove the panel board using six screws. It is important not to overtighten the screws once reassembled. 
Cut the connections: Use a cutting plier to cut the eleven melted-connection points.
Remove the panel: After cutting the connections, you can remove the panel board.
Remove the screws: The panel board is attached with six screws. Once removed, you can proceed with further disassembly.
Reassembly caution: When putting it back together, be careful not to tighten the screws excessively. "

https://elektrotanya.com/sony_ss-bx9_dx9_vx99.pdf/download.html

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