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18
KDC-2027SA/SAY/SG/SGY, 3027A/AY/G/GY
KDC-308A/AY/G/GY, 4027/V/VY/Y, F327A/G
A
B
C
D
E
1
2
3
4
5
6
7
22K
22K
22K
22K
4.7K
4.7K
4.7K
4.7K
5.0V
0V
5.0V
0V
0V
0V
2.4V
2.4V
0V
5.0V
5.0V
0V
5.0V
0V
8.0V
0V
3.8V
3.2V
8.0V
0.7V
0V
0V
0V
2.4V
0.8V
2.5V
2.5V
8.0V
0V
2.5V
4.2V
AM
PW-ON
0V
2.8V
FM
0V
2.0V
3.4V
60mV
0V
5.0V
2.0V
3.2V
PW-ON
AM
AM
AM
3.2V
3.4V
0V
0V
4.1V
2.4V
0V
2.0V
3.3V
FM
AM
0V
AM
FM
4.2V
FM
AM
0V
3.3V
0V
FM
4.0V
8.0V
8.0V
8.0V
0V
3.5V
8.0V
4.2V
0V
IC6
(X34-31xx-xx)
(X89-2590-10)
∗
IC4
ELECTRIC UNIT
DAUGHTER UNIT
DECODER
RDS
∗
CN3
BUFFER
Q503
MPX
BUFFER
Q201
NOISE
∗
E
∗
Q40
D503
D506
D504
∗
C
J1
ANT.
D3
D405
D407
D403
D410
D505
AMPLIFIRE
Q502
FM RF
AMPLIFIRE
D501
AM RF
Q501
D409
D411
D408
D402
D401
DRIVER
MUTE
J4
∗
D
REAR
Q225
Q221,222
Q225
D404
CN91
DTC143TUA
DTA124EUA
:
:
∗
WH1
AUDIO
DRIVER
MUTE
MUTE
SW
AUDIO
Q222
Q221
CN90
Q224
Q223
MUTE
J5
CHANGER CONNECTOR
PRE OUT
PRE OUT
FRONT
C545
6800P
∗
C537
8
R351 2.2K
R352 2.2K
C354
10u6.3
∗
C558
0.01
∗
C557
0.01
C353
10u6.3
1
14
C351
15
2
∗
R173
C352
330P
1K
5.6K
C551
0.01
C548 0.022
12
W530
EXTRES
7
FILOUT
ARI
8
GND
0.01
6
9
FSEL
TM
VCC
10
11
C550
0.033
2200P
C549
51
77
16
RDDA
OSCIN
OSCOUT
RDCL
3
OSEL
MPX
VREF
5
4
10P
X2
4.332MHz
13
C355
10P
T57
14
15
C356
2.2K
QUAL
2
1
R353
62
C600
100u10
C555
1000P
W534
0.01
L517
4.7uH
C546
R542 4.7K
∗
W403
∗
W402
R205 4.7K
1K
R541
1K
2.2K
20
R204
W512
13
61
57
W531
20
17
18
R547 22
14
15
W523
10
11
12
8
∗
C538
26
25
24
23
22
21
C547
10u10
R546
L514
4.7uH
33K
R545
4.3K
LFOUT
OSCVCC
20
19
PLL
VCC
PLLGND
LFIN
LFREF
LFHC
10.250
X50
XT
ALG
FMAGCVOUT
16
VCOB
VCOE
OSCGND
18
17
FMANTADJ
FMRFADJ
15
14
FMMIX1IN2
FMAGC1OUT
FMAGCIN
13
12
11
FMMIX1IN1
RFGND
10
9
14
∗
C526
R501 6.8K
∗
L507
∗
L505
R543
W507
W505
11
R522
∗
C523
∗
C521
∗
C524
∗
R521
∗
C525
∗
C522
GND
100K
L4
C516 10P
L501
6.8uH
45
C534
0.01
L511
4.7uH
4.7uH
10.700MHz
W508
∗
W401
∗
C528
R524
100K
C543
68P
R544
C542
22P
18
C541
17
C544
15P
6P
W500
100K
R527
W504
W415
∗
R525
C533
0.01
C513 0.01
C515 1
7
6
3
C514 0.01
R528
100K
15
C512
4.7u16
W533
100K
C531
1
C535
2P
∗
C530
R523
100K
∗
C536
∗
L506
10
∗
W524
330
∗
R529
13
5.6K
12
8
L510
4.7uH
C511
0.01
FMAMP2OUT
FMIF
AMP2IN
FMIF
A
MPREF
FMIF
A
MP1OUT
FMIF
AMP1IN
FMNA
GCIN
3
5
ANAGC1VOUT
ANAGC1OUT
ANAGC1TC
7
6
AMMIX1IN-
A
4
TUNGND
VREF5V
2
1
70
∗
CF53
0.1
C582
IF1GND
MIX1OUT2
MIX1OUT1
IFVCC
79
80
76
77
78
TUNVCC
73
74
75
71
72
∗
C581
L508
R581
C580
0.01
1K
∗
CF52
AMMIX2IN1
69
10.700MHz
C591
33u10
∗
C529
2P
33u10
W521
C506
0.1
C507
L503
1mH
R505
C505
4.7u16
C503
0.1
∗
C502
R502
2.2K
R506
1M
C508
22u10
R503
2.2K
7
L512
4.7uH
W601
L513
1K
6
R507 1K
C510
68P
100P
C509
C504
33uH
L502
0.01
46
44
L504
100uH
3
2
1
4.7K
10.700MHz
CF51
0.01
C585
12
RL
RR
FL
FR
W509
∗
R253
∗
W408
∗
R252
∗
W407
C253
0.22u50
W161
C252
0.22u50
4.7K
2
3
4
R403 4.7
R406 4.7K
R405 4.7K
R404 100
19
1
25
C403
100u10
A GND
CH CON
MUTE
REQ H
BU
D GND
R411 100
R401 10
R410 100
R409 4.7K
R408 4.7K
R402 10
R407 4.7K
8
C402
1u50
17
16
C401
1u50
18
63
D
ATA
H
D
ATA
C
Lch
RST
Rch
12
8
REQ C
CLK
5
4
3
1
2
3
4
W102
5
+
C222
10u16
Q221,222
11
7
13
10
9
6
5
1
+
C221
10u16
W101
R221
270
∗
W160
R222
270
R226
30K
R229
100
30K
R225
1
2
R230
100
3
C224
10u16
C223
10u16
W156
R224
R223
270
W516
270
2
PGND2
R232
R231
100
R227
30K
R228
30K
100
∗
C227
680P
∗
C226
680P
33P
4P
27P
R526
4P
48P
∗
C594
+
+
+
+
+
+
+
+
+
+
+
+
+
+
X34-3102-7x (1/4)