KAC-210D/210MR
3
COMPONENTS DESCRIPTION
●
AUDIO UNIT (X09-5800-xx)
Ref No.
Application / Functions
Operation / Condition / Compatibility
IC1
Line input isolation amp
9V AVR operation (center voltage 4.9V)
IC2
Speaker input isolation amp
9V AVR operation (center voltage 4.9V)
IC3
LPF frequency selector
Select for 50, 80, 100, 150Hz (Default 150Hz)
IC4
Volume control
Electric volume (VCA)
IC5
LPF, phase selector
LPF (-12db/oct.) Phase 0
°
/180
°
IC6
1/2 VCC output OP amp
Center voltage 4.9V
IC101
Chopping wave generator & protection control
Clock 140kHz, protection time (2sec for Power on)
IC103
Power amp first stage, NF circuit
9V AVR operation (center voltage 4.9V)
IC201
D class amp driver
PWM digital converter, FET driver IC
IC202
Clipper circuit
9V AVR operation (center voltage 4.9V)
Q1
Phase selector
Switching for phase 0
°
and 180
°
Q101~104
Power FET
D class AMP final FET
Q105
9V AVR
Use for OP amp
Q107,108
P-CON control
When P-CON line more than 8.7V, this circuit is active (ON)
Q109
Over load voltage detector
When ACC line more than 18.2V, this circuit is active (OFF)
Q110
Muting transistor
Muting for PWM driver when Power is on
Q111,112
Protection detector
Feed back for protection data (latch operation)
Q113
DC protection detector
DC voltage sensibility is
±
5V
Q114
LED control
LED light up when Power is ON
Q115
LED control
LED light off when protection circuit ON
Q116
12V AVR control
12V AVR feedback transistor
Q118
Temperature & voltage detector
Protection function
Q119
Power supply voltage detector
Detect for Power off condition
Q120
Discharge transistor (for C148 when Power is off)
Malfunction for LED light up
