Marantz SA8004/K1SG Service Manual page 41

Check analog output-1
8U-210103-2(AUDIO UNIT)
・U204 (23)(24)(19)(20)pin
Check analog output-2
8U-210103-2(AUDIO UNIT)
・Check analog output
Check mute signal
8U-210103-2(AUDIO UNIT)
・Check MUTE control voltage
N201 4pin : MUTE ON
: MUTE OFF
Check analog output terminal
8U-210103-2(AUDIO UNIT)
・Check RCA PIN JACK
: Analog output
O.K.
O.K.
4V
-12V
O.K.
O.K.
END
N.G.
Check soldering.
・C,R around U204
N.G.
Check soldering.
・Q323,Q325,Q324,Q326
Check the cable and the connection of connector.
N.G.
Check soldering.
・N201
・Q481,Q482,Q483,Q484
Check the cable and the connection of connector.
N.G.
Check soldering.
・N301,N302
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