KAC-649S
2
COMPONENT DESCRIPTION
REF. No.
FUNCTION
OPERATION
Q1-4
MUTE
Decreases shock noise in first moment when P.CON. turns on or off.
Q5-12
DIFFERENTIAL AMPLIFIER
Q13
RIPPLE FILTER
Q14-17
DIFFERENTIAL AMPLIFIER
Q18-21
TEMPERATURE COMPENSATION
Detects temperature of the heat sink, and protects bias current drift.
Q22-29
OVER-CURRENT PROTECTION
Detects over-current, and limits the power stage current.
Q30-37
POWER AMPLIFIER DRIVER
Q38-45
POWER STAGE
Q46
P.CON. DETECTION
Detects P.CON-ON, and turns Q47 on or off.
Q47
POWER SWITCH
Supplies power to IC5.
Q48
MUTE ON/OFF
Turns Q49 on or off.
Q49
MUTE DRIVER
Q50,51
SWITCHING POWER STAGE
Q52
OVER-CURRENT PROTECTION
The detected over-current stops IC5's working.
Q53
OVER-VOLTAGE PROTECTION
When over-voltage puts on BATT, Q53 turns P.CON. off.
Q54,55
CONSTANT VOLTAGE POWER SUPPLY
Su and - 15V power.
Q56,57
SWITCHING DRIVER
Q58-61
DIFFERENTIAL AMPLIFIER
IC1,2
INPUT BUFFER / ISOLATION AMPLIFIER
Makes an input signal 6 more dB signal,
and cancels automobile noise.
IC3,4
IC3,4 (1/2) : LPF
IC3,4 (2/2) : INVERTER
IC5
SWITCHING REGULATOR
Oscillator for DC/DC converter.
AUDIO UNIT (X09-5420-10)
