Sharp MD-X7H Service Manual page 87

Y PWB-C6
EXA
D7
D6
D5
D4
D3
D2
D1
D0
RD
+B
WR
L
RS
C752
CS3
2.2/50
RESET
C754
2.2/50
C756
2.2/50
C758
2.2/50
+B
C760
2.2/50
C771
390P
R778
1K
INPUT SELECTOR
772 R771
+B
5K 1.2K
7
IC751 ~ IC753 : LCD AMP.
IC751
BA10358
2
–
1
+
3
6
+
7
–
5
8 4
+B
IC752
BA10358
2
–
1
+
3
6
7
5
8 4
+B +B
IC753
BA10358
2
–
1
+
3
5
7
6
8 4
+B
+B
SW781 ~ SW784 : MULTI CONTROL
R788 R787 R786 R785 R784 R783 R782
18K 8.2K 4.7K 3.3K 2.2K 1.8K
1 18
VSS VDD
2
DATA 17
OE
3 CLK SW12 16
CD PLAY
4 LCK1 SW11 15
MD PLAY
5 SW10 14
SW1
DISC3 P
6 13
SW2 SW9
M REC DISC2 P
7 SW3 12
SW8
MD IN DISC1 P
8
SW4 11
SW7
INTER NET SRS
9 10
SW5 SW5
IC771
BU2092F
R795
1K
LED775
SLR325MG
8
Figure 51 SCHEMATIC DIAGRAM (10/20)
+B
R759
150K
L751
4.7µH
+B
L752
4.7µH
R760
C763
220
47/16
+B
+B
R781
1.5K 1.2K
SW781
MULTI-DOWN
+B
C774 C775
150P 1/50
+B
+B
R732
1K
R791
1K
LED771
R342MGF7
+B
SWITCH A PWB-C2
9 10
– 51 –
D7
12 12
D6
11 11
D5
10 10
D4
9
D3
8
D2
7
D1
6
D0
5
RS
4
RD
3
WR
2
CS3
1
RESET
4
D GND
3
+B +5V
2
+13R5V
1
IC751
+B
PIN
NO. VOLTAGE
1
5.1V
2
5.1V
3
5.1V
4
0V
+B
5
4.3V
6
4.3V
7
4.3V
8
12V
IC752
PIN
NO. VOLTAGE
1
3.6V
2
3.6V
3
3.6V
4
0V
5
2.8V
6
2.8V
7
2.8V
8
12V
CNP773
+5V
1
+13R5V
2
D_GND
3
FROM MAIN PWB
KEY3
4
KEY2
5
KEY1
6
KEY0
7
RX_IN
8
JOG701
VOLUME
CNP774
JOG1
1
JOG2
2
FROM MAIN PWB
D_GND
3
DATA
4
CLK
5
LCK2
6
IC753
PIN
NO. VOLTAGE
1
2
3
4
5
6
7
8
11
MD-X8H
9
8
TO MAIN PWB
7
CNP975
6
5 P40 1-B
4
3
2
1
4
TO MAIN PWB
3
CNP970
2
1
P40 1-C
IC771
PIN
NO. VOLTAGE
1
0V
2
0.1V
3
4.7V
4
4.6V
5
0V
6
0V
7
10.6V
8
0.4V
9
11.9V
10
0.5V
11
10.4V
12
10.4V
13
10.4V
14
10.4V
15
10.4V
16
0V
17
0V
18
4.8V
CNP940
P41 12-D
CNP930
P41 12-E
8V
8V
8V
0V
1V
0.2V
10.8V
12V
12