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Appendix
Laser 1000/1500 Service Manual
Video Controller Board (C108 MAIN Board)
Table A-2. CN3 Pin Assignment
Pin No.
1,2
3 , 4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23,24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
Signal Name
+5
D2
D3
DO
D6
D7
D4
D5
D8
A l
A2
A5
A6
A3
A9
A7
A8
Al 1
WR
UDS
LDS
o
0
—
o
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
I
o
0
0
0
0
Description
+5
VDC
Ground
Data bus bit 2
Data bus bit 3
Data bus bit O
Data bus bit 1
Data bus bit 6
Data bus bit 7
Data bus bit 4
Data bus bit 5
Data bus bit 10
Data bus bit 11
Data bus bit 8
Data bus bit 9
Data bus bit 14
Data bus bit 15
Data bus bit 12
Data bus bit 13
Address bus bit 1
Address bus bit 2
Ground
Address bus bit 5
Address bus bit 6
Address bus bit 3
Address bus bit 4
Address bus bit 9
Address bus bit 10
Address bus bit 7
Address bus bit 8
Address bus bit 13
Address bus bit 14
Address bus bit 11
Address bus bit 12
Address bus bit 17
Address bus bit 18
Address bus bit 15
Address bus bit 16
Address bus bit 21
Address bus bit 22
Address bus bit 19
Address bus bit 20
card data bus drive enable
card enable
Address bus bit 23
Write enable
Upper data strobe
Lower data strobe
Address strobe
Rev.