Kenwood KAC 6202 Service Manual

Page 2

KAC-6202

BLOCK DIAGRAM

X09-590

'\ R\ L

JV [7 3
ISOLATION

AMP P. AMP OUTPUT

+6dB
PHASE
INVERT

SW
ST/MONO

727~ SdB I OdBlLPF:+6dB) 26dB

COMPONENTS DESCRIPTION

0 AUDIO UNIT (X09-5900-10)

Ref. No. Application / Function Operation / Condition / Compatibility
|C1 Buffer amplifier +6dB, low-impedance conversion
|C2 Isolation amplifier Common mode noise filtering
|C3 Buffer amplifier +6dB,Rch reversal
|C4 Reversal buffer amplifier +6dB, reversal amplifier
|CS,6 HPF/LPF Filter with variable cutoff
|C7 DC/DC converter Oscillation and control of DC/DC converter
01,2 Switching Transistor for ON/OFF control of latter step driver
03~6 Drive transistor FET driver for the latter steps
07,8 Switching FET Switching FET for the secondary power supply
0201 ,202 For muting Transistor for muting B-class step
0203~206 Differential amplifying transistor Transistor for first step differentiation amplification
0207~210 Differential amplifying transistor Transistor for second step differentiation amplification
0211,212 Current mirror load Current mirror load of second step differentiation
0213,214 Temperature compensating transistor For prevention of thermal-runaway of the final transistor
0215~218 Over current protection Transistor protection against excess current
0219~222 Power amplification First step of Darlington power amplification
0223~226 Power amplification Second step of Darlington power amplification
0501 ,502 Constant voltage stabilization Transistor for constant voltage stabilization
0601 ,602 Switching Transistor for mute ON/OFF control for B-class step
0603,604 Switching Transistor for mute control for B-class step
0605 Switching Transistor for DC protection circuit latch
0606 Switching For DC protection latch ON control
0607,608 Drive transistor For DC protection circuit driving