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TROUBLESHOOTING
AND DIAGNOSTICS
Power Connector (Controller PCA)
HP-IB Connector
Pin #
Function
Pin
#
Function
1
+12V Misc
1
Data
Bus
1
2
+12V
for Nighthawk
Motor
2
Data
Bus
2
3
Ground
for Nighthawk
Motor
3
Data
Bus
3
4
Ground
for +12V Misc
4
Data
Bus 4
5
PVAL
signal
from
Power
Supply
5
EOI
6
Mechanical
Key
6
Data
Valid
7
Ground
for +5V
7
Not
Ready
For Data
8
+5V
8
Not
Data
Accepted
9
Interface
Clear
Figure
8-7 shows the cable interconnect
for the
10
Service
Request
HP 9153/54A.
11
Attention
12
Chassis
Ground
13
Data
Bus 5
14
Data
Bus 6
15
Data
Bus
7
16
Data
Bus
8
17
Remote
Enable
18
Ground
19
Ground
20
Ground
21
Ground
22
Ground
23
Ground
24
Ground
3 1/2-inch Flexible
Disc Drive
Figure
8-7.
Cable
Interconnect.
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