Schematic Diagram - Kenwood KRF-V7772D Service Manual

U V
Q Q
3 7 6 3 1 5 1 5 0
(X08-297X-XX) (A/10)
+17V
17V
VDD
R743
10K
R755
47K
73
74
75
R744 3.3K
79
R745 3.3K
80
R746 3.3K 0V
81
81 AMUTE S
T E
L R776 3.3K 1 3 9 4 2 2 9 6 5 1 3
82a
R747 3.3K
0V 82
82 AMUTE MAIN
R748 1K
4.7V 83
83 RELAY SPA
R749 1K
0V 84
84 RELAY SPB
R750 470
0V 85
85 RELAY SPC&S
R751 1K
4.8V 86
86 RELAY POWER
R752 1K
4.7V 87
87 RELAY SECOND
R796 1K
0V 88
88 PROTECTION I
R797 1K
0V 89
89 PROTECTION V
0V 90
Ir RECEIVER ON/OFF
D705
0V 91
91 SEL CK
D706
0V 92
92 SEL DA
D707
0V 93
93 SEL ST1
R788 3.3K 0V 94
94 ATT3
R789 3.3K 4.9V 95
95 ATT6
R777 470 0V 96
TAPE2 LED
R757 100 5.1V 97
97 IR RWR
R758 100 0V 98
98 IR REN
R759 100 0V 99
99 IR REQ
100
VSS
REMOTE
IC72 u-COM
28
1
28
1
27
2
27
2
26
3
26
99 REQ
25
4
25
97 RER
24
5
24
98 REN
23
6
23
6
R767 100
22 0V
7
D7 8
7
R766 100
R756 21 0V
0V 8
D6 7
REMO
w w w
R765 100
100 20 0V
5.1V 9
D5 6
VDD
R764 100
19 0V
2.5V 10
D4 5
XOUT
R774 C712 R763 100
2.3V 11 18 0V
XIN D3 4
1M 0.01
12 17 0V R762 100
GND D2 3
5.1V 13 16 0V R761 100
.
RST D1 2
14 15 0V R760 100
WDO D0 1
X72
C708
3.64MHz
D708
0.1
VDD VDD
W X
+17V
17V
VDD
VDD
96
R722 47K
R723 47K
R724 47K
R725 47K
R726 47K
R727 47K
R728 47K
CODEC AC3
CODEC ERR/OVR
CODEC CS
IC71
SYSTEM u-COM
C714 100P R815
C713 100P 47K
R708 47K
R705 10K
R706 47K
R701 10K
R702 47K
R769 10K
x a o u 1 6 3
y
R771 10K
i
R703 10K
R704 47K R773
12
100
VDD VDD
VDD VDD
Y Z
8
VDD
VDD VDD
D855
R853 330
R855 100K
77
R856 100K
76
D856
R854 330
R851 100K
R852 100K
D854
4.9V
69
VDD
68
R859
100K
R860 100K
Q Q
3 7 6 3 1
50 0V
DSP AC3 50
49 0V
DSP DTS 49
D858
48 0V
48
47 4.4V
47
R717
46 4.9V
46
45 0V 3.3K
REM1
44 5.0V
REM0
43 5.0V
RESET
42
XT1
X71
41
XT2
12.5MHz
40
VSS
39 2.3V C711 R716
X1
38 2.6V 4700P 1M
X2
37 4.9V
VDD VDD
36 5.1V
CE
D704
35 0V C704
VOL. CK 35 100P
D703
34 0V
VOL. DA 34
D702
33 0V
VOL. ST 33
D701
32 0V
TONE ST 32
31 0V
V MUTE
R714 33K
R808
D801
4.7
R713 33K
1/4W
R712 33K
R711 33K
VDD
R710 33K
R805
10K
5.0V
R820 33K
R818 33K RESET
+ R804
1K
0V
+
Q801
.
VDD
VDD VDD
AA AB
2 4
9 9 8
+17V
17V
VDD
+5.8V
77
76
D853
C866
0.1
77
76
D857
5 1 5 0 8 9 2 4
REPEATER
+5.8V
OUTPUT AMP
+13.7V
44
13.4V
AMP
R878
13.4V
100
0V
Q856
R880
0V
22K
+13.7V
IR INPUT
AMP
D860
4.8V
0V
Q852
L81 100uH
VDD
0V
5.3V
IR INPUT AMP
R867
Q853
D861
0V
1K
Q853
0V
L82 100uH Q854
+5.8V
VDD
R802
10K
m
RESET IC
IC81 5.1V
C802
c o
1u50
OUT IN
+
GND
5.1V
VDD
AC AD
2
9 9
+17V
17V
+13.7V
+5.8V
J81
SYSTEM
CONTROL
BUSY
DATA
GND
D851
D852 S1
C853 0.1
78
9 8 2 9 9
C854
J82
220P RX
68
TX
SL16
69
C855 TEXT
220P
13.4V
Q857
J85
R881
470 1/4W
0V
IR
R882
REPEATER
OUT
470 1/4W
C865
0.01
J84
13.4V Q851
IR RECEIVER
R862
IN
1K R865 DC12V 15mA
0V
470
1/4W
J83
IR OUT
5.3V LCD
Q855
R870 REMOTE
10K
0V
C858 A
330P R872 C862
5.3V 100 100P
TEST PIN
5 CLK
75 4 SCK
73 3 SO
74 2 SI
1 GND
1 RST
VDD 2 VDD
3 VPP