Block Diagram - Kenwood KAC-M1804 Service Manual

BLOCK DIAGRAM

RCA IN or
Speaker
-3.3dB
Level IN
CN1
A_L+
A_L-
Ach
Input
A_R+
A_R-
B_L+
B_L-
Bch
Input B_R+
B_R-
SP-IN detection circuit
Gain control
Auto-Pcon
Stabilized Power Supply
Q226 Q216
+5V +11.5V
Q227 Q217
-5V -11.5V
No.WA122
SP IN : -26dB
LPF
RCA IN : 0dB
fc:55kHz
+9.9dB
IC10
IC12 IC2
IC10
IC12
IC2
IC11
IC12
IC3
IC11
IC12
IC3
L201
+23.9V (BATT:14.4V)
D225
+B
D224
-B+12V
D227
Q218
D226
-B
-23.9V (BATT:14.4V)
Power Amp
+23.3dB
IC4
J1
L1
Digital AMP
LC
Driver&FET IC
Filter
[IR4302]
IC4
L2
Digital AMP
LC
Driver&FET IC
Filter
[IR4302]
IC5
L101
Digital AMP
LC
Driver&FET IC
Filter
[IR4302]
IC5
L102
Digital AMP
LC
Driver&FET IC
Filter
[IR4302]
Current DC
Protection Protection
IC9
Q205
FET
Q207
FET
DC/DC Converter
(No.WA122<Rev.002>)3/6
Speaker
Out
TotalGain
RCA IN:+29.9dB
SP IN:+3.9dB
A_L+
A_L-
Ach
Output
A_R+
A_R-
45W/4Ω
1kHz
2Ω
: Non-supported
Bridge : Non-supported
B_L+
B_L-
Bch
Output
B_R+
B_R-
J1
FUSE
15A
Batt.
Q213
Q212
P-Con.
Q214
GND
Q215
ON/OFF control
SHASSIS
created date:2015-03-23