3
KAC-9103D
COMPONENTS DESCRIPTION
●
PREAMPLIFIER UNIT (X08-4180-12)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC11 (1/2)
INFRA SONIC FILTER
Cutting super-low area of voice signals
IC11 (2/2)
INVERTER
Reversing voice signal phase
IC12 (1/2)
OP AMP
Voltage amplification, buffer
IC12 (2/2)
BASS BOOST
High-boost (variable levels)
IC13
LOW PASS FILTER
Cutting high range of voice signal
IC14,15
BASS BOOST
High-boost (variable levels)
●
AUDIO UNIT (X09-5820-14)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
DC/DC converter IC
Create drive signal for switching element
IC2 (1/2)
Differential amplifier
Detection of temperature, DC, and excess current and hold protection for a certain time
IC2 (2/2)
Differential amplifier
Containing excess voltage of
±
B
IC11
Isolation amplifier
Prevention of noise by the electric potential difference of GND
IC12,13
NAND
Generation and forming of Dclass section reversal waveform and dead time
IC31
Comparator
Digitalize signal by comparing analog signal and triangular wave
IC32 (1/2)
Triangular wave generation
Reference signal generation for converting analog signals to digital signals
IC32 (2/2)
Error amplifier
Error compensation by feedback from output
IC61,62
Comparator
Detection of short-circuiting of SP output and determine excess current for triggering protection
Q1~3
PCON switch
Turns on the circuit when ON-signal is impressed on PCON
Q4,5
Mute
Mute drive signal generation, Turn LED off
Q8~11
Gate drive
DC/DC converter FET gate drive
Q12~14
DC/DC converter
DC/DC converter switching
Q18~20
Q25,26,28
AVR
±
15V AVR
Q29,30
Tracking when
±
15V AVR is OFF
Adjusts ‘-15V’ AVR falling to ‘+15V’ AVR falling
Q36
DC/DC converter ON/OFF control
Stops DC/DC converter switching when protection is triggered
Q37,38
DC/DC converter pulse ON/OFF control
ON/OFF of DC/DC converter drive waveform
Q41
4.4V AVR
Vref 5V reference AVR
Q42
AVR
±
15V AVR
Q43
DC/DC converter ON/OFF control
Stops DC/DC converter switching when protection is triggered
Q151
Mute
Turning off voice signal
Q187~190
Electric power amplification
Dclass large current switching
Q401~409
Pulse amplification and rectifying
Generation of signal for driving Dclass final FET
Q411~414
Q416
15V AVR
Integration AVR for obtaining Dclass High+B
Q417,418
Control of ON/OFF of electric
Makes the electric power amplification section non-operative for 1.2 seconds when the
power amplification section
power is turned on and when protection is triggered
Q601,602
Comparator
Detection of short-circuiting of SP output and determine excess current for triggering protection
Q603
DC/DC converter control
Convey IC62
u
pin output, result of excess current detection, to IC2 and stop the DC/DC converter
Q604~607
Electric current and voltage conversion
Conversion of current to voltage of the current flowing to final
Q608~611
Latch circuit
Detection and holding of output excess voltage
Q612
FAN +B
When P-CON is ON, fan is rotated
