Kenwood DMF-3020 Service Manual page 13

U V
+5V
+5V
8
+5V +5V
R34
100K
4.9V
IC34
S RAM
1
2 4.9V
3
EXLAT(DARST)
4
EXCLK(DINSEL)
5
RD
6
WR SRAM
7
CS
8
STB
9
VDD
10
POWER
11
MUTE
12
INI SW2
13
IC31
SCHNG
MAIN
14
S BUSY u-COM
15
S DATA
0.4V
16
SCL
17
SDA
18
LDON
19
RMS
20
XLAT
21
SENS
22
GND(VPP)
23
PROTECT
24
PEFRECT
25
DISC IN
26
STTLMT
27
PHOT SW
28
REC SW(REC-P)
29
LOAD IN
30
LOAD OUT
4.9V
C55
R72 2.7K
0.01
R73 100K
X3
12.5MHz
NJM4558D TA8409S NJM4580D DA204U
NJM4565D
W X
+5V
+5V
+5V
+5V
IC33
8BIT MEMORY
LATCH
Q23,24
BACK UP
VOLTAGE
DETECTOR
R96
0V 100K
Q23 Q24
R95
R94
1K
1K
80 0V R102
79 4.9V 100K
MC 79
4.9V
79
78
MD 78
4.9V
78
77
77
ML
76 0V
STANDBY 76
75 4.9V
DCLK 75
3
74
DWDT 74
73
72
FLDCE 72
71 4.9V
DRON
70 4.9V
ENCB 70
69
68
67 4.9V R97
SCLK 67
R98
66 4.9V 1K
SWDT 66
1K
65
SRDT 65
64 4.9V
AVREF 1 +5V
63 4.9V
ENCA 63
62 4.9V
BACK ON
61 0V
GND
60
PROT
59
IC6
BACK V
58 1.6V R80
INI SW
57 0V R93
TM SW
57
R92 100
56 100 R79
KR3 56
R91 100
55
KR2 55
54 R90 100
3.9V
KR1 54
53 R89 100
4.9V
KR0 53
52
+5V
AVREF 0
C57
51 4.9V
VDD
0.1
4.5V
+5V
+5V
+5V
+5V +5V
4.9V
+5V +5V
31V 31V
UN5212 2SK246 2SK163
Y Z
R170
1K
INVERTER
(MASTER CLOCK)
D38
IC22
0V 3.3V
(1/6)
1 2
C172
5P
R162 INVERTER
R176
1M
R101
X2 1M
47
3.3V
+B
22.5792MHz
R100 C170
14
(BOTTOM VIEW)
R178 390 100P 5 6 R163
1M
IC22
1.5V
1.7V
(3/6)
B
IC22
1.6V
(2/6)
C171
W148 100P 3 4 R164
150
R177
1M
C173
13 12 IC22
5P
(6/6)
9 8
IC22
R174
(4/6)
7
11 10 IC22
(5/6)
+B
A
VDD
4.9V
5.1V
11
IW1
10
IW0 23
OBF
9
24
IUD
OIS
8
IIS 25
OLRRL
7
C104 IBF 26
OUD
0.01
6
27
VSS IC40
FILH
4.9V 5 (BOTTOM VIEW) 28
RST VSS
R22
DSP R157 470
330 29 2.6V
4
LRCKO
12 LRCK (D.R.I.V.E.II)
30 2.0V R158 470
R21
DATAO
330 3
DATA
31 2.6V R159 470
BCKO
R20 2
8 BCK 32
DRVW
330
C102
1 33
MUTE THRMN
0.01
2.1V
IC6
IC
PROTECT
C103
100u10
+
R258
1 5.1V
VDD VDD
5.2V
+5V
+5V
+5V
+5V
+5V
31V
TC74HCT7007AF CXA2523AR
TC7S08FU
TC74HCU04AF
TC74HC00AF
AA AB
4
+3.3V
R184 R183
1M 1M
+
C128 C127
100P 100P
+ +
1.7V
3.2V
IC8
ADC
DAC
1.6V
3.3V 0V 0.4V 3.2V
3.4V
+
C118
W111 100u10
C115
+
10 100u10
D36
+
ANALOG ANALOG
OUT (R) OUT (L)
+3.3V +3.3V +3.3V
2.6V
28 1
77 ML LRCK
4.9V
2 2.0V
27
DATA
79 MC
3 2.6V
26
RCK
78 MD
D24 4 1.0V
4.8V 25
CLKO
MUTE
5 2.0V
24
XTO
MODE
1.6V
23
CS
6 C168
ANALOG 4.8V 22
XTI
RST
OUT (L) 1000P
7
W155 21 DGND
ZERO
1.3V 8 4.8V
L1
DVV
82uH
5.2V 20
9
VCC VCC2L
VCC2R
+
5.2V
19
AGND2L
10
AGND2R
C98 2.5V
22u35 18 11
C187 RXTL RXTR
+
100P
17 12
NC NC
W108 2.5V 16
13
VOUTL VOUTR
R232 4.8V 15 14
VCC VCCL AGND1
ANALOG
22
+
OUT (R)
W128
+5V +5V
+5V
+5V
+5V
+5V
31V
TC74HC373AF BH6511FS TL431CLP
TC74VHC244F
AC AD
R145
330
+ +
DIGITAL
IN
DIGITAL
OUT
ANALOG
IN (R)
ANALOG
IN (L)
REC
AMP
IC41
(BOTTOM VIEW)
DAC
C122
R156
0.01
820
C89
12P
C90 R207
100
12P
0V
C145
33u16 R203
R180
22
+
L2
0V
VCC
82uH
+
C94
2.5V 22u35
+
C188
2.5V
D30
100P
0V
C146
33u16 R204
+
R208
0V 100
ICP-N10
CXD2652AR