Kenwood KAC-6202, Руководство по обслуживанию

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KAC-6202
2
BLOCK DIAGRAM
COMPONENTS DESCRIPTION
Rch
IN
Lch
LINE
Rch
Lch
HPF
LPF(+6dB)
LPF(+6dB)
HPF
MUTE
AMP
ISOLATION
+6dB
P. AMP
+6dB
PHASE
ST/MONO
SW
SW
HPF/OFF/LPF
INPUT OUTPUT
6dB 6dB -27 0dB(LPF:+6dB) 26dB
INVERT
L
R
RCA
IN
SPEAKER
X09-590
●
AUDIO UNIT (X09-5900-10)
Ref. No. Application / Function Operation / Condition / Compatibility
IC1 Buffer amplifier +6dB, low-impedance conversion
IC2 Isolation amplifier Common mode noise filtering
IC3 Buffer amplifier +6dB,Rch reversal
IC4 Reversal buffer amplifier +6dB, reversal amplifier
IC5,6 HPF/LPF Fitter with variable cutoff
IC7 DC/DC converter Oscillation and control of DC/DC converter
Q1,2 Switching Transistor for ON/OFF control of latter step driver
Q3~6 Drive transistor FET driver for the latter steps
Q7,8 Switching FET Switching FET for the secondary power supply
Q201,202 For muting Transistor for muting B-class step
Q203~206 Differential amplifying transistor Transistor for first step differentiation amplification
Q207~210 Differential amplifying transistor Transistor for second step differentiation amplification
Q211,212 Current mirror load Current mirror load of second step differentiation
Q213,214 Temperature compensating transistor For prevention of thermal-runaway of the final transistor
Q215~218 Over current protection Transistor protection against excess current
Q219~222 Power amplification First step of Darlington power amplification
Q223~226 Power amplification Second step of Darlington power amplification
Q501,502 Constant voltage stabilization Transistor for constant voltage stabilization
Q601,602 Switching Transistor for mute ON/OFF control for B-class step
Q603,604 Switching Transistor for mute control for B-class step
Q605 Switching Transistor for DC protection circuit latch
Q606 Switching For DC protection latch ON control
Q607,608 Drive transistor For DC protection circuit driving