Kenwood KRC-31Y Service Manual page 12

K
PRE OUT
L R
J5
R227 R228
30K 30K
Q223 Q224
0V
PREOUT
MUTE
RST
+B
C104 15P
5V
X1 0V
C105
15P
0V
0V
5V
5.0V
0V
5V
0V
FWD : 5.0V
REV : 0V
5V
0V
FWD/REV
5V
0V
EQ-MUTE
5V
0V MS-CONT
∗
5V
IC1
0V
SYSTEM
5V
u-COM
0V
5V
0V
5V
5V
0V
0V
V
V
5V 5V
5V 0V 0V CH-REQ H
0V
5V
5V
5V 0V
0V CH-CONT
0V
P.CON-DET
CP104
1K
L
IC7
POWER
SUPPLY
5V
2.5V
C53
10u16
+
+B
5.0V
+5V
R101
100K
5V
0V
D101
IC11
RESET
C103
0.1
0V
+5V
+8V
+5V
R136
2.2M
5V
0V
60
RESET
5V
5V
0V
0V
CP101 1K
5V
59
0V
SUB- 59
58
SUB+ 58
R132 1K
57
57
CP102 1K
56
56
55
55
54
R129
54
MUSIC
4.7K
53
SW5V 53
CP103 10K
P.CON.
52
DETECTION
EN1 52
51
EN3 51
50
BEEP
49
EN2-0
48
EN2-1 48
47
46
5V
45 0V
50
44
44
43
5V
Q50
42 0V
42
5V SW
R144
41
5V
4.7K
0V
R123
22K
IC12
EEPRON
0V 1 8 5.0V
VCC +5V
0V
2 7
WP
R120 10K
3 6
SCL
4 5
5.0V
VSS SDA
0V
R122 10K
M
(E30-4933-05)
R303
12
L304 4.7uH
R304 4.7
C54
LOCAL
10u50
SEEK SW
+
+8V
+8V
30
R305
3.3
+8V
62
+5V
15
14
R354
10
Q1
R3
120K
22K
22K
R51
47K
+5V
5
12
13
47K
6
10K
11
Q151
PANEL
RST
5V SW
61
2
KRC-31Y/36/366L/37/Y/391/394/Y/466R/4904Y (1/2)
N
WH1
ANT
∗
A1
1
RF GND
2
FM ANT
3
L303
AM ANT
4.7uH
4
+8V FM+B
5
+8V AM+B
6
AM LO/DX
7
∗
FM LO/DX
Q301
22K
22K
8
IF SELECT
9
RDS OUT
10
REQUEST
11
K2I-VTH
12
VCO-GND
13
FM SD OUT
14
13 FSD OUT
15
11 FM DET OUT
16
L305
10 AM DET OUT
4.7uH
17
+8V COMMON+B
18
IF GND
19
HI UP ADJ
20
29 PLL CE
21
8 PLL DATA
22
L306
10 PLL CLK
4.7uH
23
+5V P-ON 5V
24
DIG GND
∗
C
5V
IC6
CP315
0V
2.2K
R353
1 16
QUAL RDCK
15
2.2K
2
T57
RDDA
5V
C351 0V C356
2.3V
10u6.3 10P
3 14
VREF OSCO
+
C355
C352
10P
13
2.3V
330P
4
OSCI
MPX
12 5.0V
5.0V 5
VCC
OSEL
11
0V 6
EXTRES
GND
10
7
TM
ARI
9
8
TSEL
FIL OUT
0V
RDS DECODER
+B
R160 100
R162 47
+5V
+10.4V
R159 1K
R158 470
R157 1K
R156 1K
R155 10
+5V 11
R154 1K
R161 1K
13
R153 1K
15
O
1
2
3
4
5
J3
1 ILL GND
2
D GND
3 L RST
6
4 SW5V
X16-
5 LAMP +B
J1
6 LED +B
2/2
7 L DATA S
8 L CLK
A
9 L CE
10 L DATA L
VDD
12 RST
REMO
14 PANEL SW
ESD GND
7
P1