24
KDC-BT40U/BT645U
KDC-U546BT
X34-662x-xx (1/4)
A
B
C
D
E
1
2
3
4
5
6
7
8
12
1
7
4
10
3
1
6
6
7
8
9
9
10
10
10
11
11
5.6K
SW5V
C514
0.01
SCL
SDA
L502
560uH
C516
0.01
C518
1000P
C520
0.1
C517
0.1
C512
0.01
C513
0.01
L503
560uH
TP128
R516 5.6K
R515
R506
22
C519
47u16
R505
4.7K
C515
0.1
C511
1
R508 220
R507 220
C530
1000P
∗
R525 100
∗
C528
470P
∗
R513
∗
R514
C523
1000P
C527 15P
∗
C529
470P
0.27uH
L504
∗
L505
4.7uH
L508
0.47uH
∗
L506
∗
L507
TP506
TP507
TP504
TP505
∗
C531
2P
∗
C532
∗
C533
TP514
TP515
TP518
TP513
GND2
1
2
3
TP65
TUN
4.7uH
TP503
RSSI
MPXOUT
MPXIN
AMAGC2
GNDAUD
ROUT
LOUT
AMAGC
VCC2
GNDRF
FMIN1
FMIN2
AMRFD
AMRFI
C524
0.22
2
1
4
3
C502
C510
C509
1000P
L
R
1
1
TP501
C501
1
7
6
5
9
8
TP502
C505 0.22
C506
0.1
11
10
14
13
12
28
AMIN2
AMAGC1
AMOUT1
AMOUT2
L551
27P
31
32
29
30
VREGSUP
VCODEC
PLLREF
AMIN1
TEST
GND
PLL
26
27
23
24
25
VREF
VCC1
SDA
20
21
22
19
XT
AL1
XT
AL2
4.000MHz
X501
9P
AU8V
L501
16
15
GNDD
SCL
17
18
C525
TP516
C507
12P
1K
14
X3
4.332MHz
GND
EXTRES
FILOUT
7
NU
8
FSEL
TM
10
9
VREF
OSEL
4
6
5
MPX
C543
2.2
3
13
OSCIN
VS
11
12
OSCOUT
0.01
C542
12P
C545
R541
2.2K
R545
R542
RDDA
QUAL
2
1
T57
RDCL
15
16
330P
C544
2.2K
17
C546
23
25
L401
4.7uH
AU8V
C404
1
SDA
SCL
CD-L
CD-R
R
L
R401
C401
SCL
26
27
28
SDA
DC ERR
WIN IN
25
3
2
1
4
SE2R
SE2L
SE1R
SE1L
C920
10K
ERR
TP414
R714 330
R713 330
R611 4.3K
R610 4.7K
R612 4.7K
330
R707
330
R708
Q701-706
FL
C705 10u35
GND2
FR
R/SL
10u35
C706
10u35
C703
BU5V
R/SR
10u35
C704
C603
CH-R
93
95
92
BU
R614
10
0.1
C602
R615
47
6
3
22K
R709
R711 180
TP343
GND
∗
C876
∗
C875
22K
R715
680P
180
R712
22K
R710
R717 180
180
R718
R716
22K
680P
TP339
TP342
TP341
TP338
R603
TP90
TP93
TP92
10
R602
TP94
TP100
CON
REQ M
BU
RST
Rch
4
8
AGND
47
TP101
12
W608
6
2
3
7
1
5
TP91
10
11
9
180
TP344
330
10u35
R701
C701
R705
TP340
RL
330
R702
RR
10u35
C702
22K
R704
22K
R703
180
R706
R343
TP165
TP176
23
19
CN DET
17
18
1K
31
12
VFD CLK
TP161
TP155
TP156
TP162
TP157
15
16
R
TR
Y
CW
R
TR
Y
CCW
13
VFD SYS DA
TA
14
REMO
R333
R332
R330
R340
R342
R331
36
37
100
100
R339
R338
29
2.2K
100
1K
TP160
VFD RST
or VFD INT
11
10
VFD BLK
VFD P
AN DA
TA
9
USB5V
VFD CE
R336
R337
R341
30
44
2.2K
1K
32
2.2K
TP163
TP159
USB D-
USB
D+
D-
D+
∗
R351
BU5V
∗
R350
100K
∗
R335
SW5V
100K
47K
USB5V
VFD DA
TA
TP891
2.2M
3.9K
3.9K
FL+B
TP164
20
FL+B
SW5V
TP881
TP871
TP175
TP174
MIC N
21
MIC P
22
100
R355
100
R354
MIC-
MIC+
18
24
ESD GND
SW5V
R543
2.2K
AU8V-2
AU8V
-2
AU8V-2
+
+
+
+
+
+
+
(ATOMIC)
IC
TUNER
ANT.
W551
TUNER UNIT
RDS IC
∗
A
E-VOL
MUTE SW
PRE-OUT
D602
Q703
∗
F
Q705
Q704
for
Q706
Q707
PRE-OUT
DRIVER
MUTE
REAR/SUB
FRONT
∗
J5
Q702
∗
E
Q701
REAR
PRE-OUT
REAR
FRONT
REAR
/SUB
J3
P1
PANEL
2/2
X16-
D312
2.2V
5.7V
8.5V
7.2V
3.9V
3.2V
3.2V
8.5V
1.8V
0V
0V
0.5V
0V
0V
FM : 0V
AM : 2.9V
FM : 0V AM : 4.1V
FM : 0.4V
AM : 1.8V
FM : 0.4V
AM : 3.7V
3.8V
3.6V
AM : 1.6V
FM : 0V
FM : 8.5V
AM : 6.8-8.5V
FM : 1.5V
AM : 3-5.5V
0V
0V
5.0V
5.0V
2.4V
0V
5V
3.3
0V
∗
IC501
IC7
IC2
(X34-662x-xx)
ELECTRIC UNIT
A