Kenwood KDC-3024A Service Manual page 17

P
∗
Q251
47K
10K
W407
R252
4.7K
W408
R253
4.7K
CF54
450kHz
L509
8.0V
AM 1.4V
FM 2.0V FM 1.2V
0V 0V
AM 3.7V
0V
FM 5.0V
0V
FM 2.6V
0V
IC10
TUNER &
E-VOL.
3.4V 4.8V
0V 3.4V
8.0V
C556
X501 1000P
C552
C562
0.250MHz 0.01
10u10
C593
+
1
C560
100P
Q
TH1
470
W158
∗
D252
R258
∗
POWER
F
AMPLIFIRE
∗
C592
0.01
∗
∗
Q252
C590
0.1
Q252,253
SMETERRC &
∗
MPTHTC SW
Q253
4.4V
TUNER 5V 60
MPTHTC
CHANGE 0V
59
RDSMUTE 59
58
FM 4.2V
AUDIOMUTE
AM 2.4V
57
QUALITY
0V
W519
56
SMETER
FM 4.0V
W517
55
0V
SD 55
5V
R567
0V
54 1K
SCL SCL
5V
0V
R566
1K
53
SDA SDA
R565 100K
AM 3.0V C563
PW-ON 1.9V 0.47u50
52
FMMUTETC
0V
+
3.9V
51
TUNEROUT
C564
∗
0.47 C568
50
3.0V TUNERIN
C205
2.2u50
49 3.0V
IN1L 49
+
C565
47u10
48
3.0V IN1COM
+
C204
2.2u50
47 3.0V
IN1R 47
+
46 3.0V
IN2R 46
45 3.0V
IN2COM 45
44 3.0V
IN2L 44
43 3.0V
ACLOUT
42 3.0V
ACLIN
41 3.0V
ACROUT
W501
3.0V
R
E2P-ROM
IC12
5.0V
8
VCC
7 0V
WP
1
A0
2
5V
A1
6
0V
3
SCL
A2
0V 4
ADA
GND 5V
5
0V
SDA
0V
5.0V
IC8
MUTE
LOGIC
0V
0V
0V
8
R123
1K
5.0V 0V
IC11
POWER
ON
RESET
0V
R127
2.2K
61
61
57 62
63 ∗
R414 100K
R129 2.2K
64
R130 2.2K
66
0V
5.0V
C104 R131
15P 6.8K
X1
51
C105 4.194MHz
15P
0V
5.0V
R132
2.2K
R133 12K
∗
C106
∗
R134
2.2K
2.2-4.5V
77
∗
W578
0.6-4.1V
5.0V
0V
S
R20
3.3K
1/2W
ACL
R22
SCL
10K
Q20
SDA
C21
0.01
A. C. C
DETECTOR
0V
R23 R12
100K 100K
L101
4.7uH
CP3 CP2
1Kx2 2.2Kx2
5.0V
0V
5.0V
61
0V
REMO
5.0V
5.0V
0V
0V
62
R-CLK
5.0V
63
CH-REQC
0V
5.0V
0V
5.0V
64
CD-SW1
0V
5.0V
65
0V
KEY-REQ
5.0V
66
CD-SW2 0V
67
Vss0
68
VDD1
69
∗
X2
IC1
SYSTEM
CONTROL
70
X1 u-COM
71
IC
72
XT2
73
XT1
74
VDD0
5.0V
75
AVREF0
0V
76
S-METER
0-4.0V
5.0V
0V
77
5.0V
NOISE
0V
5.0V
78
0V
5.0V
PHONE
79
0V
N.C
80
AVCONT
T
R10
D10
30K
SURGE
DETECTOR
Q70 R71
D70
82K
Q10
B. U.
DETECTOR
CP1
10Kx2
0V or 5.0V
5.0V
0V
5.0V
or 0V
0V
5.0V
0V
5.0V
0V 5
0
5.0V
0V