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A B C D E

KRC-669/669G
PRE OUT
1 C
REAR FRONT
(X14-918x-xx) J3 CN3 J2
1 2 3
1 5 9
C356 C357
0.01 0.01 2 6 10




R358




R363
R357




R364
13




180




180




180




180
R355 R356 R361 R362 3 7 11
22K 22K 22K 22K

Q351 Q352 Q355 Q356 4 8 12
J4




R351




10u16 R352




C353 R359




10u16 R360
ANT.




4.7K




4.7K




4.7K




4.7K
360




360




10u16 360




360




LXCON
LXREQM




Lch




LXMUTE
Rch




LXREQS
AGND




RST




CLK
BU




R310 100 LXDATAM
GND




LXDATAS
L3
52mH
A1




10u16
C351




C352




C354




C301 R301
C302 R302
C303 R306
47u10 4.7
+




+




+




+




0.47u50 10


0.47u50 10
R304 4.7K




R305 4.7K

R308 4.7K
R303
W3
PRE PRE




100




R311




R309
R307
1




4.7K




4.7K
100
RF GND MUTE MUTE R314
2 2




RR




FR
RL




FL
FM ANT SW SW 100K




+


+


+
3 R313
AM ANT
4 D304 D308 100K D303




D311


D310


D309
OSC GND




R312 100K
5 C110 0.01 D301 R315
FM+B D307
6 100K
AM+B




CHG


CHR


CHL
D302
C102




7
0.01




OSC GND C304
8
OSC GND 0.01




81




20




28
79




78
80




18




19
9
W/N
C104




10
0.01




OSC GND
11 L6
VT
12 4.7uH
PLL+B
R101
13 1K
IFC OUT 5
45 Q350 PRE MUTE SW
14 R102
SDA 45




22K
470




22K
47
R104
15 470 IC6
3 SCL 47
8 7
R105

R103
4.7K


4.7K




COUT 0V GND
5.0V 9 6 5.0V
CIN1 BOUT
16 10 5 C6
DIG GND CIN2 BIN3
11 4 0.01
17 L7 CIN3 BIN2
VDD5V 5.0V 12
18 4.7uH C106 IC10 E2PROM AOUT BIN1
3
D403
1000P
C111




NOISE OUT 0.01 13 2
19 AIN3 AIN2
0V 1 8 5.0V




R414
100K
RDS OUT A0 VCC 1
20 5.0V AIN1
AUDIO OUT 5.0V 2 7 0V 14
21 A1 TEST VCC
AMIF OUT R106 0V 3 6
22 2.2K A2 5V SCL 47
S-METER 0V 4 0V 5
GND SDA 45 MUTING LOGIC IC
23 L8
IF1+B
4




4.7uH
C108
0.01




24
82


IF1 GND




C406
D401
Q201
4 4.7K
4.7uH




NOISE