KAC-6403
2
BLOCK DIAGRAM
+6dB
0dB
+29.5dB
AMPLIFIER
ISOLATION
IC2
AMPLIFIER
ISOLATION
IC2
GAIN
INPUT
VR1
CONT.
J1
R
L
LINE IN A
J2
SPEAKER
INPUT
HPF
80Hz 12dB/OCT
C151,153,R165,167
80Hz 12dB/OCT
HPF
C152,154,R166,168
MUTE
201,202
AMPLIFIER
POWER
119-126
Q103-114,
AMPLIFIER
POWER
J9
SPEAKER
R
OUT A
L
AVR
15V
Q3,4
CONVERTER
L2
DC/DC
OVER ROAD PROTECTION
DC DETECT &
Q115-118,215-218
CIRCUIT
P.CON
Q605
PROTECTION
THERMAL
TH1
P.CON
BATTERY
IC13
OVER VOLTAGE
PROTECTION
S2
S2
ISOLATION
AMPLIFIER
IC4
IC4
ISOLATION
AMPLIFIER
R
LINE IN B
L
INPUT
VR2
CONT.
GAIN
S1
S1
A-AB
Ach
Bch
Q101,102,
119-126
Q103-114,
IC7
+1
-3dB ATT
-3dB ATT
IC7
+1
IC9
+1
IC9
-1
80Hz 12dB/OCT
LPF+10dB
IC5
S3
S3
S3
S3
IC6
-3dB ATT
+1
-3dB ATT
-1
IC5
AMPLIFIER
POWER
R
OUT B
SPEAKER
AMPLIFIER
219-226
Q203-214,
POWER
L
219-226
Q203-214,
AUDIO UNIT (X09-8542-70)
COMPONENTS DESCRIPTION
●
AUDIO UNIT (X09-8542-70)
Ref. No
Application / Function
Operation / Condition / Compatibility
IC1
Buffer AMP
Amplifies 6dB by decreasing impedance.
IC2
Isolation AMP
Decreases common mode noise.
IC3
Buffer AMP
Amplifies 6dB by decreasing impedance.
IC4
Isolation AMP
Decreases common mode noise.
IC5
LPF
B-Rch side is phase inverter.
IC6
-3dB ATT
B-Lch side is buffer amplifier.
IC7
Buffer AMP
Decreases impedance.
IC9
Phase inverter
A-Lch side is buffer amplifier.
IC13
DC/DC converter
Oscillates and controls DC/DC converter.
Q3,4
Constant voltage power supply
Controls
±
15V constant voltage.
Q5,6
DC/DC converter
Switching FET.
Q7~10
DC/DC converter
Drives Q5’s and Q6’s gates.
