KAC-X542
3
COMPONENTS DESCRIPTION
●
AUDIO UNIT (X09-5780-11)
Ref. No
Application / Function
Operation / Condition / Compatibility
IC1,2
Input isolation amplifier
IC3
Microprocessor
IC4
Microprocessor reset IC
IC6
Current detection circuit voltage amplification
IC8
LX communication LX-CLK, LX-DATA-M comparator
IC9
AMP I2C communication signal level converter
IC10
Switching regulator
Q1
14V power supply for LX communication circuit and AMP communication IC
Q2
VDD 5V AVR
Q7~10
FET drive
Q11~16
DC/DC converter
Q17,26
+15.6V AVR
Q18,27
-15.6V AVR
Q20,21
Switching regulator power switch
Q22,24
VDD 5V AVR
Q25
SW5V
Q30,31
Standby, P-CON
Q41~44
Mute driver
Q50~53
Shock noise prevention
Q54
Mute
Q56,57
Output DC abnormal voltage detection
Q58
Logo LED power supply
Q59
LCD illumination power supply
Q61
Over current detection and protection
Q62~67
Fan operation circuit
Q73,77
BU over voltage detection
Q74,75
FET drive low start switch
Q80~83
LX communication input signal level converter
Q84
LX communication circuit power supply and AMP communication IC1 power switch
Q85,86,90,92~96,98
LX communication output signal level converter
Q91
14V power supply for LX communication circuit and AMP communication IC
Q210
Ach first stage differential amplifier
Q212,311,411,412
Temperature compensation bias
Q301~309,312
Ach first stage differential amplifier
Q314,319,321
Q315~318,415~418
Over current detection and protection
Q320,322,323,325
Ach final current amplifier
Q401~410
Bch first stage differential amplifier
Q423-426
Bch final current amplifier
Q901,902
DC/DC converter
Q905,906,945,946,967
1dB attenuation circuit
