3
KAC-6404/7404/M645/M845
●
AUDIO UNIT (X09-8722-70/2-71)
Ref. No.
Application / Function
IC1-4
Isolation circuit
IC5
LPF Phase inversion
IC7
HPF
IC8,9
Buffer ampli
fi
er
IC10
Temperature detection comparator
IC13
DC/DC converter
Q1,2,5,6
DC/DC converter power driver
Q3,4
Constant voltage circuit (±15V) power driver
Q7-10
DC/DC converter gate driver
Q11,12
DC/DC converter control
Q101,102,201,202
Signal mute
Q103-106,203-206
Differential
fi
rst stage ampli
fi
er
Q107-110,207-210
Differential second stage ampli
fi
er
Q111,112,211,212
Differential second stage current mirror
Q113,114,213,214
Idling temperature detection
Q115-118,215-218
Current limiter
Q119-122,219-222
Power ampli
fi
er driver
Q123-126,223-226
Power ampli
fi
er
fi
nal
Q127,128,131,132,227,228,231,232
Protector ATT
Q601
Shock noise prevention circuit control
Q602,603
Mute circuit control
Q604-606
P-Con control
Q607
FAN power supply drive
Q610
Over current detection
Q611-614
DC protector control
Q615-618
Shock noise prevention circuit control
COMPONENTS DESCRIPTION
