Technical data

98760 Troubleshooting
4-3
PI
P2
To Alpha/Interface Board (A 73)
To Alpha/Interface Board (A73)
Connector
P3; Power
Connector P4; lOP Bus
SGND 50
49
SGND GND
50 49
NBR
SGND 48
47
SGND NWAIT
48
47 GND
SGND 46 45
SGND
NFLG 46 45
NSTS
SGND
44 43 SGND NRAMD
44 43
GND
18
42 41
18 READ 42
41
GND
18 40 39
-18
NPOLL
40 39
GND
-18 38 37 -18 NIFC
38 37
GND
DGND
38 35 DGND NIOBSB
36 35
GND
DGND 34 33 DGND NIODO
34 33
NIODl
DGND
32 31
DGND GND 32 31 NIOD2
DGND 30 29 DGND NIOD3
30 29
GND
DGNO 28
27 DGND
NIOD4 28 27 NIOD5
12 26
25 12
GND 26 25 NIOD6
12
24 23
-12
NIOD7 24
23
GND
-12
22 21
5
NIOD8
22
21 NIOD9
5 20
19
GND 20 19 NIOD10
18 17
NIODll 18 17 GND
16 15 NIOD12
16 15
NIOD13
14 13
GND 14 13 NIOD14
12 11
NIOD15 12 11 GND
10 9
NIC4 10 NIC3
GND
8
NIC2
NICl
6
GND
NPAO NPAl
NPA2 GND
Mainframe To Display Connectors Pin Location