Kenwood DM-VH7 Service Manual page 17

Z AA
(X25-6240-XX) (A/3)
R133
Q Q J3 100K
3 7 6 3 1 5 1 5 0
GND 1 R131
D21
330
SDATA 2 37
R132
D22
330
1
SBUSY 3 38
R134
SGND 4
100K
C108
0.01
R139
SYSTEM
100K
CONTROL
D23
C106
220P
GND 1 R140
100K
SDATA 2
C107
SBUSY 3 220P
SGND 4
2
DIGITAL IN,
CE LEVEL
5V
A1
1
OUT
2
GND
1
5.0V
+
3
VDD +5V
3
DIGITAL IN Q21
MUTE
OPTICAL A2
DRIVE
1
OUT
-5.4V
2
GND
2
Q23,24
3
VDD +5V
MUTE
0V
R65 R63
1K 2.2K
R67
1K
T E
L Q23 1 3 9 4 2 2 9 6 5 1 3 -5.4V
ANALOG
R68
Q24
OUTPUT 1.2V/3.3K
1K
INPUT 0.3V/47K
4
R66 R64
-5.4V
1K 2.2K
J1
0V
Lch 4
OUTPUT
Rch 3
Rch 2
INPUT
5
Lch 1
6
w w w
X33-
CN1
1/2
A
7
AB AC
+3.3V +3.3V
C76 3.3V
3.3V 0.1
3V
IC10
4.8V
DIGITAL IN
R92 100
4.8V
R91 100
DIGITAL IN
u+5V
5.0V
A+5V A+5V
5.0V
AMP
C51
820P
R55 R51 C61
IC9(1/2)
C57 8 3 3.9K 4.7K 47u10
47u10
1
+
2
+
R59
6.8K
R60
6.8K
C58
6
47u10 7 R56 R52 C62
3.9K 4.7K 47u10
5
+
+
4
C52
IC9(2/2)
820P
-5.4V
5V 5V
+5V
5.0V
A+5V A+5V
5.0V
R31 C33
36K 10u16 5 8 C37
10u16
7
+ C82
6
+ 1000P
C41 10u16
IC6(2/2)
+
C43 0.01
2.5V
5.0V
AMP
5.0V
2.5V C85
100P
C44 0.01
IC6(1/2)
C42 10u16
C38
2
R32 C34 10u16 +
1
36K 10u16 3
+
+
4
5V 5V 5V
x a o
-5.4V
. i
AD AE
19
3.2V BACKUP
ON/OFF
R122
10K
Q27
u+5V
31
UTTX1
32
8 UTRX1
33
NC
D19
34
NC
35
UTTX2
R137 47K 1.2V 36 C.T.
UTRX2
0V 37
37 SDATA
0V 38
38 SBUSY
D20 R111 47K
5.0V 39
RDY(+5V)
40
ALE(NC)
R110 47K
5.0V 41
HOLD(+5V)
42
HLDA(NC)
43
BCLK(NC)
44
RD(NC)
45
BHE(NC)
u+5V 46
WR(NC)
47
NC
48
SRAM CS(NC)
49
UART CS(NC)
50
PROM CS(NC)
Q Q
3 7
u+5V
+3.3V +3.3V
+5V
A+5V A+5V
5.0V
R43
15K
C45
10u16 5 8 C47
7 10u16
+
6
+
C83 R45 IC8(2/2)
D14
0.01 1K
12
5.0V
AMP
IC7
ELECTRIC
VOLUME
IC8(1/2)
2 C48
C46 1 10u16
10u16
3
+
R44
+
4 15K
5V 5V
u 1 6 3
y
-5.4V
1
CN4
AF AG
25
2 4
8 9
u+5V
X1
10MHz
C103
0.1
5.0V
2.4V
4.7V 5.0V
5.0V 5.0V
IC11
MD u-COM
6 3 1 5 1 5 0 8 9
u+5V u+5V
75
+5V +5V +5V
A+5V A+5V
m
5V 5V
c o
+5V +5V
.
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26
AH AI
2
9 8 9 9
u+5V u+5V
100
5.0V
100 R106 47K
VOL LEN
99 5.0V
AVCC u+5V
98
AVREF R105
97 5.0V 47K
NC
96
AVSS
95 2.6V
PROTECT
R104
4.7K
R102
94 0V 100
X-Y POSI.SW
C113 0.01
R101 47K
93 0V
INI SW
R100 47K
92 1.1V
BUCKUP V
R103 47K
91 5.0V
KR2
90 5.0V
KR1 90
89 5.0V
KR0 89
88
D0
87
D1
86
D2
85
D3
84
D4
83
D5
82
D6
81
D7
2 4 9 8 2 9 9
u+5V
+5V +5V
5V AVR
IC4
A+5V OUT IN +7.5V
5.0V GND 7.5V
+
5V AVR
5.1V 7.5V
Q4
+5V +7.5V
5.8V
Q3
+7.5V
6.9V
6.9V
4.8V 4.8V
C12 Q6
10u16
Q7
+
+
+
4.2V
R28
Q13
560 -0.6V
+
-5.4V
+ +
-6.0V
5V 9.5V 9.5V
Q14
-5.4V
-5V AVR