Sharp MD-X7H Service Manual page 73

IC751~IC753
LCD AMP.
+B8
IC752
8 4
BA13058
7 5
1 3
7 5
1 3
8 4
+B8
IC751
BA13058
1
31 32 33 34
3
1
5
2
DISPLAY
LCD751
22
13
27
9
+B1B 12
8
10
7
KEY
RESET 1
IC903
LCD
PST9140
+B1B 2 3
RESET
10 21 53
VLOAD
G
67
43
MIC SW
F
71
39
X901
8MHz
SYSTEM CONTROLL MICON
38
CD MUTE
D
82
MIC MUTE
A
83
L-MUTE
B
85
RLY-OUT
C
86
NAME IN
E
46
47
48
SO601
5
100 1 4
KEYBOARD INPUT
A/D SW
+B1B
5
13
IC902
16
4
15
BU2092F
INPUT
2
SELECTOR
14
18
+B1B
IC771
18
4
BU2092F
INPUT
2
1
SELECTOR
9
7 8 10 15
LED705
LED706
LED772
Q702
LED775
+B8
LMP
701
UNA901
AUX
PC
DIGITAL 1
CONTROLL
INPUT
SO602
TC7WU04F
3 6
+B8
8
6 2
4
IC753
PC910
BA13058
12 13 11
IC904
MULTIPLEXER
16
74HC153P
8
FROM MD 9
2 14
SW701~707
SW721~731
SW771~776
SW781~789
JOG701
VOLUME
57 90 91 88 89 65 66 63
84
+B1B
52
9
+B1A
51
37
IC901
62
61
40
IX2679AF
42
VOLTAGE
22
REGURATOR
95
94
92
99
8
23 27 29 36 72 81
ZD401
ZD402
L R
7 8 3
9 13
INPUT SELECTOR
10
9
L
14
SRS
5 R
2 1
15 12
R R
L L
INPUT SELECTOR
+B1B
JK501A
AUX2
ANALOG
IN / OUT
Figure 37 BLOCK DIAGRAM (4/4)
SO201
JK901
SPEAKER
HEADPHONES TERMINALS
C
3
IC605
5
IC602~IC605
PC CONTROLL
2
RL201
IC602 RELAY
6
+B7
+B1B
BL
Q862
Q863
LAMP741
SWITCHING
6
7
POWER AMP.
15 STK40705
+B
3
8
2
–B
1
10 14
Q501
S-MUTE
Q502
27 29 32
+B4 1 16
17 31
GE
Q901 26
IC501
LC75396E
56
AUDIO
PROCESSOR
25
23
52 60 51 61 54 58 53 59 55
L L L L L
R R R R
VR602
INPUT
LEVEL
IC511
BU4052BC
1 7
IC440
NJM4558D
3 5
JK502
PHONO
INPUT
– 37 –
IC905
8 MULTIPLEXER
1
74HCU04
AC POWER
SUPPLY CORD
AC230V
50Hz
FAN MOTOR
M971
ON–OFF
FAN MOTOR
SW
Q271 M
Q272
F802 F803
T1.6A
T5A T5A
L 250V
L 125V L 125V
LAMP741
LAMP747
VOLTAGE
REGURATOR
Q860 Q840
Q861 Q841
IC201
Q850
Q811
Q851
–B1 +B8
+B4 +B6
~
47
D902 D905
19 21 21
64
+B1A +B1B
48
17 18
C
20 10
28 24 26
S
C
11
18
25 1 Q461
30
S
VOLTAGE
15 REGURATOR
49
63
28 27
57
R
TO MD
IC552
1 7
MIC AMP.
NJM4565D
+B4 8 4 –B1
Q541
Q542
2 6
VR601
MIC VOLUME
D
1
IC601
MIC AMP.
NJM4558D
3
Q901
SWITCHING
F
JK601
MICROPHONE
MIC SW
IC901
E
MD-X8H
JK902
AUX
DIGITAL 2 INPUT
T801
POWER
TRANSFORMER
F804
F805
T1.6A
L 250V
VOLTAGE
REGURATOR
Q880
Q820 Q830
VOLTAGE
Q821 Q831
REGURATOR
IC802
NJM431L
Q881
G
VLOAD
IC901
AUX
OUT
JK501B
+B4
ANALOG
IN/OUT
MUTE
Q421
Q423
Q424
AUX
OUT
MD
B
REC
L-MUTE
MIC MUTE
Q551
Q553
MIC MUTE
A