Sharp MD-X7H Service Manual page 11

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
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
IC753
BA10358
2
–
1
+
3
5
7
6
8 4
+B
+B
+B
SW781 ~ SW784 : MULTI CONTROL
R788 R787 R786 R785 R784 R783
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 SW11
LCK1 15
MD PLAY
SW10 14
5 SW1
DISC3 P
6 SW2 13
SW9
M REC DISC2 P
7 SW3 12
SW8
MD IN DISC1 P
8 SW4 11
SW7
INTER NET SRS
9 SW5 10
SW5
IC771
BU2092F
R795
LED775
SLR325MG
8
Figure 11 SCHEMATIC DIAGRAM (7/7)
+B
R759
150K
+B +B
R760
C763
220
47/16
+B
R782 R781
1.5K 1.2K
SW781
MULTI-DOWN
+B
C774 C775
150P 1/50
+B
+B
R732
1K
R791
1K 1K
LED771
R342MGF7
+B
9 10
– 11 –
D7
12
D6
11
D5
10
D4
9
D3
8
D2
7
D1
6
D0
5
RS
4
RD
3
WR
2
CS3
1
L751
4.7µH
RESET
4
D GND
3
+B +5V
2
+13R5V
1
L752
4.7µH
+B
+B
+B
CNP773
+5V
1
+13R5V
2
D_GND
3
KEY3
4
KEY2
5
KEY1
6
KEY0
7
RX_IN
8
JOG701
VOLUME
CNP774
JOG1
1
JOG2
2
D_GND
3
DATA
4
CLK
5
LCK2
6
SWITCH A PWB-C2
11
MD-X7H
12
11
10
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
IC751
PIN PIN
NO. VOLTAGE NO. VOLTAGE
1 1
5.1V 0V
2 2
5.1V 0.1V
3 3
5.1V 4.7V
4 4
0V 4.6V
5 5
4.3V 0V
6 6
4.3V 0V
7 7
4.3V 10.6V
8 8
12V 0.4V
9
11.9V
10
0.5V
IC752
11
10.4V
PIN
NO. VOLTAGE
12
10.4V
13
1 10.4V
3.6V
14
2 10.4V
3.6V
15
3 10.4V
3.6V
16
4 0V
0V
17
5 0V
2.8V
18
6 4.8V
2.8V
7
2.8V
8
12V
FROM MAIN PWB
CNP940
P41 12-D
FROM MAIN PWB
CNP930
P41 12-E
IC753
PIN
NO. VOLTAGE
1
8V
2
8V
3
8V
4
0V
5
1V
6
0.2V
7
10.8V
8
12V
12