Circuit diagram

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
20/09/2007
PSP-PC INTERFACE-CONTROL
.
DATE :-
SCHEMATIC CIRCUIT DIAGRAM OF
A M E N D
NO
DESCRIPTION APP CHK
DATE
TX
RX
+VDDIO
+V
+VDDIO
+V
-V
+V
-V
Q8
BC846
1
2
U5A
PC817
R26
470E
R25
5K6
R17
2K2
U5B
PC817
54
Q5
BC856
R18
1K
R19
4K7
R30
6K8
R28
4K7
Q9
BC846
R24
3K3
R21
1K
Q7
BC856
R27
470E
U7B
PC817
4
3
1
2
U7A
PC817
R20
1K
R23
2K2
D7
D 4148W
12
R22
4K7
R14
5K6
R13
5K6
D6
D 4148W
12
D5
D 4148W
12
Q3
BC846
Q4
BC856
R16
10E
R15
10E
Q6
BC846
CN13
2Pin STM
1
2
CN14
3PinSTM
1
2
3