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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