This part is a kind of semiconductor called RSN309W44.

Function of this product has RSN309W44.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

SCHEMATIC DIAGRAM-3 B MAIN CIRCUIT D756 MA700ATA D757 MA700ATA : POSITIVE VOLTAGE LINE : NEGATIVE VOLTAGE LINE 7.6V -10.4V :AUDIO SIGNAL LINE 7.6V R570 2.2M C552 0.01 L605 R558 1K B C554 16V220 R559 4.7K -10.4V -10.4V 0.3V R557 10K R591 4.7K 7.6V -10.4V R649 10 JK601 C635 0.047 IC601 RSN309W44B POWER AMP Q555 2SD2144STA SIGNAL LEVEL DET. SPEAKERS Q554 2SA1995RSTA SIGNAL LEVEL DET. D555 MA4100MTA 7V 7.6V D 0V L601 R639 10 C629 C627 R651 0.1 0.1 10 C631 C621 R641 0.1 0.1 10 HF(6 ) Lch D552 MA165TA C637 0.047 Q551 2SA1995RSTA SIGNAL LEVEL DET. C551 50V2.2 R556 100K LF(8 ) R561 100K C550 0.01 L606 R650 10 A D551 MA165TA JK602 C636 0.047 26 0V 470P 25 0V 470P 24 23 0V 470P 22 0V 470P 21 1000P 20 1000P 19 18 17 16 15 14 13 12 11 10 9 0V [ ... ]

RSN309W44 PDF Datasheet Download