KENWOOD KAC8151D
Instrukcja Serwisowa

KAC-8101D/8151D
BLOCK DIAGRAM
WIRED REMOTE CONTROL +0/+6/+9/+12dB

+

ISO AMP

INPUT VOL 0.2-5.0V

BASS BOOST +12dB/OFF

LOWPASS FILTER 50-200Hz

INFRASONIC FILTER OFF/15/25Hz

EXPANDER ON/OFF

MUTE

INPUT

D CLASS AMP -15V AVR +15V AVR TRIANGLE WAVE BATT CONVERTER SW P. CON
TRANSFORMER

POWER AMP OUTPUT

MIX

PWM

COMPEARATE AMP (DEAT TIME) OUTPUT

GND THERMAL PROTECTION OVELOAD PROTECTION DC OFFSET PROTECTION

COMPONENTS DESCRIPTION
AUDIO UNIT (X09-5480-1x)
Ref No. IC1 IC2 IC3 IC4 IC5 IC6 IC7 Application / Function Isolation amplifier Bus boost amplifier (1/2) : Lowpass filter amplifier (2/2) : Infrasonic amplifier Expander amplifier DC detection rectification amplifier Expander detection and difference output (1/2) : Triangular waveform generation (2/2) : Summing amplifier (1/2) : ASO (current, voltage comparison) detection IC8 (2/2) : DC converter control (1/2) : Triangular waveform generation IC9 IC10,11 IC12 IC15 Q1 Q3~5 Q7~10 Q11~14 (2/2) : PWM waveform generator Dead time generator Bus boost level changer DC/DC converter Mute Output FET control (current amplifier) Output FET control (current amplifier) Output FET driver Q51,52 Q53 Q55 Q61~64 Q65,66 Ref No. Q15,16 Q17~20 Q21,22 Q23~25 Q26,27 Q28 Q31 Q32 Q34 Q36 Q37~40 Q41~46 Q47~50 Output FET Speaker output current detection Output FET control power supply and control DC protection ASO DC detection IC8 (2/2) output logic invert Reduced voltage protection Over voltage protection DC/DC converter power supply DC/DC converter control Power FET driver Power FET Small-signal ± power supply When OFF quick break in a circuit of � power , supply for small-signal circuit Power FET control power supply Mute, LED and protection control Power FET driver Power FET Application / Function

2

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