Technics SH-DV290EG Service Manual page 24

A
OPERATION CIRCUIT
FL901 (A2BB00000115)
H
1 2 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
R996
150
Z Y X W V U T S R Q P O N
G
F
R907 R906 R905
3.3K 2.2K 1.8K
E
R912 R911 R910 R909
4.7K 3.3K 2.2K 1.8K
D
C 2
3
6
JK903
PHONES 4
3.5mm STEREO
5
7
1
W905
B
A
1 2
FL DISPLAY
M L K J I H G F E D C B A A B C D F G H I J K L M N O P Q R S T U
R904 R903 R902 R901 R925
1.5K 1.2K 1K 820 1K
R916 R915 R914 R913 R924
1.5K 1.2K 1K 820 1K
(RDS DISP MODE)
D974
MA165TA
S
P
3 4 5
: POSITIVE VOLTAGE LINE
-30.1V
53 54
-30.1V
51 -VP
-29.3V
A 52 P13
-29.3V
B 53 P14
-29.3V
C P15
54
-26.3V
D P16
55
-20.5V
E P17
56
-29.3V
F P18
57
-29.3V
G P19
58
-29.3V
H P20
59
-23.5V
P21
I 60
-20.5V
J 61 P22
-23.4V
K 62 P23
-23.4V
L 63 P24
-23.7V
M 64 P25
-20.7V
N 65 P26
-29.6V
O 66 P27
-29.6V
P 67 P28
-29.6V
Q P29
68
-23.7V
R P30
69
-26.6V
X S P31
70
-26.5V
T P32
71
5.1V
V
72 DD
-29.5V
U P33
73
-29.5V
V P34
74
-26.5V
W P35
75
-17.2V
X 76 P36
E
-5.3V
Y 77 P37
-10.3V
Z 78 P38
0.4V
79 REGIN0
0V
80 REGIN1
W
V
5.1V
6 7 8
: NEGATIVE VOLTAGE LINE :AUDIO SIGNAL LINE
A
B
C
A B C D E F G H I J K L M N O P Q R S T U V W X
50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 32 31
-25.6V
FM / AM 8G 30
4V
5.1V
REMOCON 29
0V
2.6V
-30V RDS DATA 28
T 5.5ms. 2.6V
RDS CLK
IC901 27
FM / AM 0.6V
C2BBFD000404 HP SW
26
5.1V
4.2V MIC DET
SYSTEM CONTROL/ 25
0V
P-P
FL DRIVE VR JOGA
24
FM / AM 0V
FM / AM
VR JOGB
4V F=6MHz 23
0V 3.3V NC(GND)
22
1.4V
P-P
-30V SH REQ
21
T 5.5ms. 5.1V
KEY KARAOKE 20
F=6MHz
5.1V
KEY TU 19
FM / AM
5.1V
V DD 1 18
5.2V 2.3V
XC OUT 17
P-P
2.3V
XC IN 16
F=32.7kHz
FM / AM Vss 15
2.7V
FM / AM X OUT 14
5.2V
1.6V
X IN
13
P-P
2V
5V
RESET
P-P 12
F=32.7kHz 2.2V
AC IN
11
F=32.7kHz 0V
SEL/ TUNER
10
4 SEL TUNER
9
5V
8
5V
7
0V
5.1V
2V / 2ms.DIV. ST/ AV.6CH
0V 6
5.1V
2V / 2ms.DIV.
LC72 CK 5
4.6V
5V
LC72 DI/ ST 4
0V
LC72 CE 3
0V
0V
LC72 DO 2
T 10ms.
2.5V
CHECK 1
81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100
R926
2.2K
R919
15K
R991
47K
L O F M K I N E
9 10
5.1V
Q901
UN4212TA
RESET
0V
5V
A
B
C
D
E
R
J
R953 100
R956 R957
1K 1K
H
R940
1K
G
R929 1K
A
R930 1K
B
R932 1K
D
R931 1K
C
X901
(6MHz)
1
2
3
R954 R952
100K 10M
X902
(32.7kHz)
D902 D901
1SS291TA 1SS291TA
Q
SA-DV290(E,EB,EG) OPERATION CIRCUIT DIAGRAM
11 12