ELCOM Euro-2000T Alpha Service Manual page 14

2.3. I/O circuits.
2.3.1. Printer control circuits.
•
•
•
•
U5
D0
3
D1
4
D2
7
D3
8
D4
1 3
D5
1 4
D6
1 7
D7
1 8
PR-SEL
1
11
74HC374
U10A
CS4
1
2
74HC00
U10D
HWR
1 2
1 3
74HC00
CPU
W-MOT
Euro-2000T Alpha/1000T
STB1
2
D0 Q 0
STB2
5
D1 Q 1
STB3
6
D2 Q 2
STB4
9
D3 Q 3
STB5
1 2
D4 Q 4
STB6
1 5
D5 Q 5
W-MOT
1 6
D6 Q 6
P-LATCH
1 9
D7 Q 7
O E
CL K
CLK
U10C
&
3 9
&
8
1 0
74HC00
&
11
RS7-9
VCC
1
9
10k
A1N
2
A2
7
B1N
1 0
B2
1 5
C28
VH
4
5
100n
VH
D7
LL4148
R30
T11
4k7
TIP110
GND
Service manual
U8
VCC
1 6
1 ,2 E N
V CC1
VH
8
3 ,4 E N
V CC2
PA1
3
1 A
1 Y
PA2N
6
2 A 2 Y
PB1
11
3 A
3 Y
PB2N
1 4
4 A
4 Y
1 3
G ND
G ND
1 2
G ND
G ND
L293D
BD14
C9
BCM4532
100n
W-MOTOR
RS2
P-DO
*
DO
PR-LATCH
P-LATCH
PR-CLK
P-CLK
D-LCD/PR-DI
LCD/PR
B 220R
CNN5
1
2