Very rare  Sansui electronic circuit board for AU-X1;  Power Supply & Protector Circuit Board F-2781- used, untested.
The board is in very-good condition, but it is untested, so what you see you will get it. As you can see on the pictures the board is undamaged, nothing missing... That board is for international version of AU-X1 (not for domestic Japan version of AU-X1).
If you already have Sansui Amplifier AU-X1, this very important board is the last chance to get one as spare circuit board.

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