Kenwood KRC-29Y Service Manual page 12

K L
Q Q
3 7 6 3 1 5 1 5 0
∗
IC4
7.3V
C255 1u50
+
C256 100u10
+
Q251
40
Q251
POWER IC
SVR SW
∗
2.5V
R146
1V 1.6V
2.2K
T E
5V
L 1 3 9 4 2 2 9 6 5 1 3
0V 2.5V
R143
DSI SW
240
Q101
D102
5V
0V 1
DSI
2 5V
2 PANEL
0V 5V
5V
3
0V
0V
5V
0V 4
AVSS 0V
5
5 L-RST
5V
6
6 L-CE 0V
5.0V 7
AVREF1
R102 5V
2.2K
8 0V
8
9
R103
PLL-DATA
2.2K
10
5.0V
10 PLL-CLK
0V
R104 11
L-DATA L
100K
5V
11
0V
R105 2.2K
12
5.0V
12 L-DATA S
0V
R106 2.2K 13
13 L-CLK
5V
14
14 R-DATA 0V
15
15 R-QUAL
16
16 CH-DATA C
5V
17
17 CH-DATA H 0V
18
18 CH-CLK
19 5V
19 M-STBY
0V
20
20 T-END
5V
0V
4.3V 5V
0V 0V
R107 47K
R109 47K
∗ ∗
R111 47K R112 47K
w w w ∗ ∗
R113 47K R114 47K
28
.
M N
PRE OUT
∗ ∗
J5 J6
C225 0.01
∗
POWER
A
AMPLIFER R227 R228
30K 30K
Q223 Q224
Q221-224
PREOUT
MUTE
C257 +
1u50
R257
10K
5V
R101
0V
100K
R262
180K
IC11
50 D101
RESET
C103
0V
0.1
C106
4700P C104 15P
X1
R140 C105
5V
160K
0V
15P
R137
4.7K
64
5V
0V
60
0V
RESET
5V
5V
0V
5V 0V
5.0V
0V CP101 1K
5V
5V 59
0V
4V
SUB- 59
0V
0V 58
FWD : 5.0V
SUB+ 58
REV : 0V
5.0V
57 R132 1K
0V
FWD/REV 57
5V
CP102 1K
0V
56
EQ-MUTE 56
5V
55
0V MS-CONT 55
R129
54 4.7K
MUSIC
5V
IC1
0V 54
53
SYSTEM
SW5V 53
5V
u-COM CP103 10K
0V
52
EN1 52
5V
51
0V EN3 51
50
R145
BEEP
49
10K
EN2-0
48
EN2-1 48
5V
5V 47
0V
0V 5V
46
0V
5V
45
0V
50
5V 5V
44
5V 0V 0V CH-REQ H 44
5V
43
0V
0V 5V
5V
5V
42 0V
5V 0V
0V CH-CONT 42
0V 41 R144
P.CON-DET
4.7K 5V
0V
5V
0V
R123
22K
IC12
0V EEPRON
CP104
1K
1 8 5.0V
5V
VCC
0V
2 7 0V
WP
3 6
SCL
4 5
5.0V
VSS SDA
0V
x a o
y
i
O P
(E30-4933-05)
WH1
ANT
8
A1
1
RF GND
2
FM ANT
3
L303
R303
AM ANT
12 4.7uH
R225 R226 4
FM+B
30K 30K
L304
R304
4.7 4.7uH
5
Q221 Q222
AM+B
6
C303
AM LO/DX
0.01 7
FM LO/DX
Q301
22K
LOCAL 22K
8
SEEK SW
IF SELECT
9
RDS OUT
10
REQUEST
11
K2I-VTH
12
VCO-GND
13
30 FM SD OUT
14
P.CON. 13 FSD OUT
15
DETECTION
11 FM DET OUT
16
L305
R305
10 AM DET OUT
3.3 4.7uH
17
COMMON+B
Q1
22K
18
IF GND
22K
19
HI UP ADJ
20
29 PLL CE
21
8 PLL DATA
22
L306
10 PLL CLK
4.7uH
23
P-ON 5V
24
DIG GND
62
5V
IC6
CP315
0V
2.2K
1 16 R353
15 QUAL RDCK
15 2.2K
2
T57
14 RDDA
5V
C351 0V
2.3V C356
10u6.3
3
10P
14
VREF
OSCO
+
C352 C355
330P 2.3V 10P
4 13
MPX OSCI
5 12 5.0V
OSEL VCC
6 11
GND EXTRES
7 10
ARI TM
Q Q
8 9
3 7 6 3
FIL OUT TSEL
0V
RDS DECODER
0V
R354
10 5.0V
POWER IC IC7
13.8V 1
P.CON
C50 2
5V 48 EN2
10u35
3
0V 2.5V
P.ANT
+
4
51 EN3
8.3V 5
FM+B
14.4V 6
VCC
8.3V 7
AM+B
0V 8
GND
8.3V 9
AUDIO
10
52 EN1
10.4V 11
5V
ILLUM
0V
C56
100u16
12
VP1
+
14.1V
R51
47K
5.1V 13
BU.5V
Q50
R160 100
5V SW
R162 47
5
R159 1K
12
R158 470
13
R157 1K
47K
6
R156 1K
10K
11
Q151 R155 10
R154 1K
PANEL
5V SW
R161 1K
61
u 1 6 3 2
R153 1K
.
KRC-29Y/35R,379R/RY,481R (1/2)
KRC-479R/RY (1/2)
Q R
2 4
9 9 8
CAUTION: For continued safety, replace safety critical components
only with manufacturer's recommended parts
list).indicates safety critical components. For continued protection
against risk of fire, replace only with same type and rating fuse(s). To
reduce the risk of electric shock, leakage-current or resistance
measurements shall be carried out (exposed parts are acceptably
insulated from the supply circuit) before the appliance is returned to
the customer.
DTA114EK
DTC114YUA
DTC143TUA
UN5114
UN5211
UN5214
UN5216
DTA124EUA
∗
DTC114EUA
C
DTC124EUA
KRA102S
1 5 1 5 0 8 9 2 4
LB1930M
2SB1443
J3
1 ILL GND
2
D GND
3 L RST
4 SW5V
X13
5 LAMP +B
-J1
6 LED +B
2/2
7 L DATA S
UN5212
8 L CLK
A
9 L CE
10 L DATA L
11 VDD
m
12 RST
13 REMO
c o
14 PANEL SW
15 ESD GND
P1
KRC-29Y/35R,379R/RY,479R/RY,481R
S T
2
9 9
(refer to parts
2SA1036K 2SD1760
2SD1819A
2SD2114K
DTA114YUA
9 8 2 9 9
TDA7479D
2SC4081
BR24C01AF
BR24C01AF-W