Kenwood 1050MD Service Manual page 21

U V
+5V
11
5.0V
+5V
R320
100K
IC33
5.0V 4.9V
MEMORY IC
4 3 2 1
4 3 2 1
8BIT MEMORY
LATCH
5.0V
0V
1
5.0V
2 80
SRCLAT
3 79
5.2V
EXLAT DSUB2
4 78
DSUB1
5 77
5.0V
RD DEMPH
6 76
WR SRAM DLAT
7 75
CS DCLK
8 74
STB DWDT
9 73
VDD DRDT
10 72
POWER FLDCE
71
4.5V EXDT
11 70
MUTE CENA
12 69
INI SW2 CTXD
0V
13 68
SCHNG CRXD
14 67
S BUSY SCLK
IC31
15 66
S DATA SWDT
MAIN
16 65
SCL u-COM SRDT
17 64
SDA +5V
0V
18 63
LDON ENCA
19 62
RMS BACK ON
20 61
XLAT GND
21 60
SENS ENCB
4.9V
22 59
GND BACK V
23 58
PROTECT INI SW
24
PEFRECT
25 57
DISC IN TM SW
26 56
STTLMT KR3
27 55
PHOT SW KR2
0V
28 54
REC SW(REC-P) KR1
5.0V
29 53
5.0V
LOAD IN KR0
2.8V
30 4.9V 52
LOAD OUT +5V
51
VDD
2.4V
( )
5
( )
43
R345 100K
R346 100K
R347 100K
R348 100K
5.0V
X3
12MH
Z
5.0V
W X
+5V
-33V
+5V
+5V
+5V +5V
+5V
0V
+
MEMORY IC
5.0V
IC29
5.0V
+5V
R357
0.5V
100K
5.0V
0V
( )
79 49
( )
78 3 3
0V
( )
77 2 2
(
)
76 1
75 2
74 1
73
72
( )
36
R379 100 4.5V ( )
37
70
( )
38
R380 100
69
R381 100
68
R387
4.9V
67
4.9V 1K R386
66
1K
65
+5V
0V
0V 41
63 R355
D2
1K
5.0V
0V 42
D1
Q23 0V 43
D0
4.9V
0V 44
60
Q24 STB
0V
45
R370 47K GND
2.5V
46
X
R371
47
0V 110K R394
BACK UP
57 48
R385 100 100 VOLTAGE
56
DETECTOR 49
(
)
R384 100 70 CENA
55
50
( )
R383 100 69 CTXD
54 51
( )
R382 100 68 CRXD
53
52
+5V C311 0.01 53
C310 0.01
54
55
+5V VDD
+5V
R391 100K 56
R366 100K
57
R368 100K 58
R369 100K
59
R300 100K 60
X
C
+5V +5V
5.0V
Y Z
+5V
-33V
+5V
5.0V
SERI PARA
0V
CONVERTER
IC32
0V
R378 100K 0V
R377 100K
R376 100K 5.0V
5.0V
0V
0V
0V 0V
0V
0V
4.5V
4.5V
R361
+5V
100K
0V 0V 0V
R362
100K
5.0V
0V
IC30
8BIT
MEMORY
LATCH
+5V
0V
0V
20
4.5V 19
18
17
16
15
5.0V
14
13
C321
0.1
12
11
IC28
VSS
4.5V
10
TEXT INPUT X1
2.3V
u-COM
9
X2
2.5V
8
+5V
VDD
7
RESET
6
5
4
3 4.5V
X MODE
2
5.2V 1 4.5V
SCLK 1
0V
78
73
5.1V
X
D215
+5V
AA AB
+5V
+5V
14
11
13
X
A
Q26
D.R.I.V.E ON/OFF
CONTROLLER
22
23
21
5.2V
23
OW20N
24
OW20N
25 5.0V
+5V
IISN
26
IISN
27 IC25
STATE
28 SAMPLING
TST1N 2.5V
RATE
29
CON
TST2N
30
R287 RSTN
1K 31
RSTN
32
VSS
2.5V
33
VSS
2.5V
5.0V
R239
D33
0V
2.5V
+5V
R290
10
X
5.2V C316 0.01
X
IC27
8 7
TEST GND
9 6 4.5V
SW1 X MODE
10 5 0V
SW2 MCK 28
C312
4.5V 11 4 5.2V
(
)
0.01 1 SCLK WFCK 22
IC26
0V 12 3 0V
( )
78 SRDT SCOR 20
5.2V
13 2 5.2V
( )
73 DQSY SBSO 21
X
1
R295 0V
14
EXCK 23 2.4V
VDD
(
)
29
100K
1.5V
CD TEXT
X 2.1V
DECODER
R352 1.8K ( )
49
X 2.6V
X ( )
R297 34
L3
4.5V 1K 2.5V
2
2.4V
( )
3
X X
Q21 Q22
1
X
L4
AC AD
-33V
+5V
+5V
+5V
X R190
470
5.0V
+5V 5.2V
Q26
DIGITAL REC ( )
4
31
0V
NC
32
DAC TESTO
11
IFM2 33
DAC TEST1
10
34
IFM2
RZ
9
35
IFM1
GND AR
8
IFM1 36
RO+
7
37
ICKSL
IC24
RO-
6
ICLK 38
VDAR D.R.I.V.E.
5
39 (REC)
LRCI 5
VDAL
4
BCKI 4 40
LO-
3
2.6V
41
BCKI
LO+
2
42
DI
GND AL
1 0V
DI 43
LZ
44
RESET N
45
DAC TEST2
2.5V
470
+5V
DIGITAL REC
R244 220
13
+5V
5.2V
DIGITAL REC SEL
(LINE/OPT/COAX)
16
VCC
5.0V
1
SEL
2 15
1A ST
X
3 14 2.6V W2
1B 4A
2.5V X W1
4 13
1Y 4B
X
5 12 2.6V R238 470
2A 4Y
6 11 0V
2B 3A
PLAY: 0V REC:1.6V
7 10
2Y 3B
8 9 PLAY: 0V REC:1.6V
GND 3Y