Kenwood KRC-335 Service Manual page 9

J K
+B
0V 0V
0V 0V
IC4
POWER
7.3V
AMPLIFER
IC4
C255 1u50
+
C256 100u10
+
Q251
SVR
+5V
67
67
+5V
R107 3.3V
2.5V
100K
1V 1.7V
65
ACC-DET
0-3.5V 66
S-METER
5V
67
HOLD 0V
5.0V
5V
68
+5V VDD 0V
69
69 M-STBY
5V
70
70 T-END 0V
71
NC
72
NC
5.0V 73
VDD
0V
74
GND
75
GND
76
GND
77
OPEN
78
OPEN
0V 79
GND
5V
0V
80
X OUT
X1
4.5MHz
11
15
L M
PRE OUT
** **
B A
J5 J6
R227 R228 R225
30K 30K 30K
Q223 Q224 Q221
Q221-224
PRE MUTE
+ +
C257
1u50
+
R257
3.6K
45
+B
+8V
+5V
+5V
+5V
5V
5V
0V
0V
R161
10K
41
5V
0V
40
EN2-1
5V 5V 5V R159
5V
0V 0V 0V 10K
0V 39
EN3-0 39
4.8V
5V R160
38
0V
0V EN3-1
10K
37
EN1 37
36
SVR 36
35
R134 47K
35
P-STBY
34
IC1 P-MUTE 34
5V
33
0V SW 5V
SYSTEM
5V 5V
u-COM R136 1K
0V 0V
32
32 R137 10K
IC2-SDA
31 5.0V
VDD +5V
*
5V
30 R184 10K
0V
5V TYPE 0
*
0V 5V R183 10K
29
0V OPEN or 5.0V TYPE 1
5V
28
5V
5V 0V TYPE2
0V 27
0V
IC2TYPE0
5V 5V 26
NC
0V 0V
25
NC
5V
5V
0V
0V
R122 R133 R132
100K 10K 4.7K
5V
R121
5V
R131 DSI DRIVER
100K 0V
0V
100K
+5V
47K
Q191
R196 10K
D101
240
N O
ANT.
J1
L301
A1
W501 52mH
1
0
RF GND
2
FM ANT
3
AM ANT
4
R226
OSC GND
30K
Q222 5
+B FM+B
6
+B AM+B
7
OSC GND
8
OSC GND
9
OSC GND
10
OSC GND
11
VT
12
+8V PLL+B
R123 13
IFC OUT
14
22K
8 PLL DATA
15
9 PLL CLK
16
DIG GND
R301
150 W6 17
+5V VDD 5V
D301
18
IF2 GND
L307
4.7uH
19
+B IF2+B
20
11 AUDIO OUT
21
10 SD
22
66 S-METER
23
IF1+B
24
IF1 GND
TUNER
R51 47K
Q50
5V SW
33
P.CON.
DETECTION
46
Q52
R52
220K
C50
10u35
**
D R2 4.7K
POWER
ANTENNA
D5
DETECTION
47
R53
220K C51
Q51
10u35
13.6V
5.0V 41
13.6V
0V 2.5V
39
8.2V
+B
14.4V
+B
8.2V
+B
0V
8.2V
+8V
5V 10.3V
0V
5.0V
L101
5.0V
+5V
4.7uH
W508
0
R194 47
+5V
W510 W509 0
0 R103 560
4
R104 470
5
R105 560
6
R101 1K
R198
Q190 3
10
+B
R193 1K
67
R187 1K
56
PANEL
7
SW
R197 1K
P Q
IC1 :
LC72366-9996
IC2 : TDA7407D
IC4 : TDA7386
*
IC5 :
IC6 : LB1930M
IC7 : TDA3682ST
IC10 : HD74HC27FP
Q10,11,51,52
: 2SC4081 or
2SD1819A
Q41 : DTA124EUA or
UN5112
Q50 : 2SA1036K
Q190,191 : DTA114YUA or
UN5114
Q221-224 : DTC143TUA or
UN5216
Q251 : DTC114YUA
Q501 : 2SD1760
Q551 : 2SB1443
Q552 : DTC114EUA or
UN5211
D1 : 1N5393G-M6 or
*
S2V20 A
D2,4 : 1GWJ43 (TPB5)
D3,5,551 : AM01Z or
ERA15-01
D10,11,401,402
: MA4068(N)-M
D20 : MA4051-L or
HZS5C1
D101 : B30-1567-05
D102,103,106,108,
403-405,407-409,
411 : MA4062-L or
HZS6C1
D201,251-253
: 1SS133
D301 : MA4051 (N)-M
POWER
SUPPLY
IC7
1
P.CON
2
EN2
3
P.ANT
4
EN3
5
FM+B
6
VP2
7
AM+B
8
GND
9
AUDIO
10
EN1
11
ILLUM
12
VP1
13
BU5V
J3
1 ILL GND
2 D GND CAUTION:For continued safety, replace safety critical components only
3 LRST
with manufacturer's recommended parts (refer to, parts list).
4 SW5V
X16-
5 LAMP +B
safety critical components. To reduce the risk of electric shock, leakage-
J1
6 LED +B
current or resistance measurements shall be carried out (exposed parts
2/2
7 LDATAS
8 L CLK are acceptably insulated from the supply circuit) before the appliance is
A
9 L CE
returned to the customer.
10 LDATAL
11 VDD
DC voltages are as measured with a high impedance voltmeter. Values may
12 RST
13 REMO
vary slightly due to variations between individual instruments or/and units.
14 PANEL SW
15 ESD GND
P1
KRC-335/365/465/465W/565
R
1
2
3
4
5
Indicates
6
7