Kenwood KRF-V7773D Service Manual page 31

BN BO
C
(X13-77XX-XX)
(A/5)
CN3
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
CN9
-34.0V
NC 1
-35V 2 35V
POWER ON : 2.1V
15.4V
R216 1K
RELAY TR 3 87
R219 1K
RELAY CS 4 84
FAN GND 5
R218 1K
RELAY B 6 85
R217 1K
RELAY A 7 86
27.5V
8 +B
FAN +B
F.OFF 9
RELAY R215
10 88
POWER
H 1K
u-COM +12V 11 +12V
14.6V
u COM GND 12
THERM SW 13
R222 1K
V.PROTECT 14 94
R213 1K
10W 15 91
R214 1K
1W 16 92
2
R221 1K
I.PROTECT 17 95
R223 1K
FAN ON/OFF 18 90
R224 1K
FAN H/L 19 89
Q25
CN6
5.0V
u-COM VDD 1 +B
u-COM GND 2
R329 100
V.ST 3
78
R330 3.3K
B MUTE 4 81
R331 3.3K D48
S MUTE 5 80
R332 3.3K
79
SW MUTE 6 79
D47
D43
I R333
5.1V
80
3.3K
A MUTE 7
82
81
R334 3.3K
10dB CTL 8 78 82
C39 R36
470u6.3 75
VB OUT 9
+
R237 47K
R236 47K
C203 0.01
IC22
IR-TX
R234 47K
u-COM
1
1
R235 47K
2
2
3 28 C202 0.01
99 REQ 28
4 27
97 RWR 27
5 26
96 ENB 26
6 25
6 25
24
7
24
7
23
23
R242
22 100
D7 8
R243
21 100
D6 7
R244
8 20 100
455K D5 6
5.3V 9 R245
+B VDD
19 100
X2
D4 5
2.6V
3.63MHz
R246
10 18 100
XTO D3 4
2.4V
C201 R247
0.01 11 17 100
XTI D2 3
R248
12
GND
16 100
D1 2
13
RST R249
14 15 100
WDO D0 1
R256
+B
1
5.3V
BP BQ
J
1 2 3 4 5 6 7 8 9 10 11 12
+14V
+B
IC24
8
1
VCC +B
2ch BUS
7
BUFFER
2 6
3 5
4
Q26
GND
D46
D45
81
B MUTE
82
A MUTE
83
D SW 3
84
84 RELAY CS
85
85 RELAY B
86
86 RELAY A
87
87 RELAY TR
88
88 POWER
89
89 FAN H/L
90
90 FAN ON/OFF
91
91 10W
92
92 1W
93
1R SEL
94
94 V PROT
95
95 I PROT
96
STANDBY LED
R238 100 97
97 REM RWR
R239 100
98
98 REM ENB
R240 100
99
99 REM REQ
100
VSS
+B
+12V
+B
1 2 3 4
CN12
L
BR BS
K
CN8 CN7
1 2 3 4 5 6 7 8 9 10 11
15.4V
35V
+14V
+B
5.3V
+B
D21 D23
66
65
63
62
D22 D24
+B
5.0V
ON STANDBY KEY
3 RDS CLOCK
IC23
MAIN u-COM
P MACRO
1 2 3 4 5 6 7 8 9
CN5
M
BT BU
WH1
12 13 1 2 3
6.3V
+6V
+14V
+B
+B
57
55
50
REM2 50
49
REM1
48
48
47
46 R279 33K
D SW 2
R292 33K
R296 33K
45
D SW 1 45
C214
1000P
44
OCE
43 R341
RESET
42 1K
XT1
41
XT2
40
VSS
39 C210
X1
4700P
38
X1
X2
12.5MHz
37
VDD +B
R290
3.3K
36
ENC B 36
C211
5.0V
100P
35 R291
ENC A 35
3.3K R294
C209 47K
34 100P
TV SENS 34
R283 47K
33 R285 3.3K
C 33
R286 3.3K
32
B 32
R287 3.3K
31
A 31
30
+B
5.0V
+B
+12V
+B
+B
10 11 12 13
BV BW
A
4 5 6 7 8 9 10 11 12 13 14 15
16.7V
C219 C217
10u50 22P
+
D36
C218
22P
5.3V
R313
330
+B
1/4W
+B
Tr SW
R200
10K Q51
R252
D25
Q52
D
L12
100uH
RESET
Q53 R311
1K
15.4V
5.0V R303
1
5.0V
+B
+12V
14.6V
5.0V
6.3V
IC14
AVR
+6V +6V IN OUT
GND
27.5V
+B
1 2 3 4 5 6 7
CN4
N