Kenwood RD-M23 Service Manual page 22

AE AF
DISPLAY PWB-A3
1
2
LED PWB-A7
R701
390
LED702
SLI343YC
3
LED701
SLI343YC
GND
CFW701B
2 1
2 1
CFW701A
4
D_GND
1 1
P_CONT
2 2
USWD_5R6V +B
3 3
4
D722 D723
1N4148 1N4148
5
R7A9
3.3K
1
Q701
2
KRC102 M
R7A6
1K
4.8V
2
0V
3
R7A7
1K
1
0V
R796
1K
6
Q707
KTA1266 GR
+B 11.6V
11.5V
R792
47K
10.9V
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to
parts list). indicates safety critical components. For continued protection against risk of fire, replace only with same type
7 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.
AG AH
SW727
FUNCTION
SW726
REW
R706
PRESET DOWN
3.9K
SW718
VOLUME DOWN
SW725 R718
1.5K
CD STOP
R707
SW713
TUNING DOWN
2.7K
VOLUME UP
R708
2.2K
R719
SW712
1.2K
SW722 CD PLAY/ PAUSE
R710
TUNING UP
MEMORY/SET
2.7K
R720A
1.2K
SW711
SW721
FF
R711 R720B
BASS/TREBLE
1.2K PRESET UP 1.2K
R727
47K
R729
47K
+B
R723 47K
+B
R728 1K
SW709
C703
ON/
STAND-BY R702 0.1
10K
X701
8MHz
X702
32.768kHz
C701
22P(CH)
SW710
CD LID
R731 1K
OPEN/CLOSE
R795 R724
47K 5.6K
R732 1K
R733 1K
R734 1K
R735
R721
10K
+B
L702
2.2µH
+B
5V +B
+B
R7A0
R7B0
1K R7A5
10K
10K
RX701
R7A3
REMOTE 100
0.4V
0.4V
SENSOR
Q702
1.1V
KTC3199 GR
0.4V
R7A4
120
0.4V 1 2 3
Q703
R7A1
KTC3199 GR
R7A8 C714
1K
560P
82
R778 47K
R779
47K
R780 47K
Q708
KTA1266 GR R781
47K
11.6V 11.7V
Q709
R798 R783
KRC102 M
4.7K 33K
+B 2 3
Q706 10.8V 0V 4.4V
R797 +B
C704
KRC102 M
2.2K 0.022
1 0V
2 3
0V 4.1V
R793
10K
1
0V
AI AJ
LCD701
FL DISPLAY
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76
100
1 COM3
2 COM2
2.47V
3
COM1
2.47V
4 COM0
0V
5 VLC3
1.7V
6 VLC2
3.25V
7 VLC1
5V
8 VDD
2.49V
9 OSC2
2.47V
10 OSC1
0V
11 VSS
2.24V
12 XI
IC701
2.47V
13 XO
IX0039SJ
0V
14
MMOD
0V SYSTEM MICROCOMPUTER/
15 VREF–
5V FL DRIVER
16 CLID_SW
5V
17 KEY1
5V
18 KEY2
5V
19 MODEL
0V
20 CLID_PRO
0V
1K
21
4.9V
22
0V
23 VSM
4.9V
24 VREF+
0V
DI
25
5V 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
C705
0.01
P_CONT
The DC voltage is an actual reading measured with a high impedance
type voltmeter with no signal input. The measurement value may vary
depending on the measuring instruments used or on the product.
AK AL
26 27 28 29 30 31 32 33 34 35 36 37 38
SEG25 75
SEG26 74
2.5V
SEG27 73
2.5V
SEG28 72
2.5V
SEG29
71
2.5V
SEG30 70
2.5V
SEG31 69
2.5V
SEG32
68
2.5V
SEG33 67
4.9V R761 1K
CCE 66
5V R774 1K
BUCK
65
R762 1K
5V
BUS3 64
5V R763 1K
BUS2 63
5V R764 1K
BUS1 62
R765 1K
5V
BUS0 61
CD_STB
4.9V R766 1K
CD_STB
60
4.9V R767 1K CD_RES
CD_RES 59
R768 1K PU-IN
4.9V
PU–IN 58
0V R769 1K CLID_DW
CLID_DW
57
4.9V R770 1K CLID_UP
CLID_UP 56
0V
55
4.72V R772 1K
DIMMER
54
4.76V R773 1K
LIGHT 53
4.8V
52
4.8V
51
R785 R784
B-LIGHT
1K 47K
47 48 49 50
CLE
DATA
SD
STEREO
+B CD+B
CLID_PRO
P_STB
P_MUTE
CE
CL
DO
DI
CLID_SW
B-LIGHT
Y39-4120-21
AM AN
CNW702 CNS702
CLID_DW
1 1
CLID_UP
2 2
CLID_PRO
3 3
CLID_SW
4 4
CD_RES
5 5
CCE
6 6
BUCK
7 7
BUS3
8 8
BUS2
9 9
BUS1
10 10
BUS0
11 11
CD_STB
12 12
PU-IN
13 13
LIGHT
14 14
DIMMER
15 15
+B
R789
47K
R786
47K CNS703
SD
1 1
STEREO
2 2
DO
3 3
CL
4 4
CE
5 5
DI
6 6
CD+B
+B
7 7
P_MUTE
8 8
P_STB
9 9
A_12V
10 10
D_GND
11 11
CNW703
+B
+B
RD-M23