HP 16500B User Manual
Page 69
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5
Check for the following voltages and signals using an oscilloscope.
Disk Drive Voltages
Pin
Signal
Description
Pin
Signal
Description
Pin
Signal Description
1
NC
13
Ground
24
Write Gate
2
Disk Change
14
NC
25
Ground
3
NC
15
Ground
26
Track 00
4
High Density
16
Motor On
27
Ground
5
NC
17
Ground
28
Write Protect
6
NC
18
Direction
29
Ground
7
+5 V
19
Ground
30
Read Data
8
Index
20
Step
31
Ground
9
+5 V
21
Ground
32
Side Select
10
Drive Select
22
Write Data
33
Ground
11
+5 V
23
Ground
34
Ready
12
NC
6
Select Stop, and turn off the logic analyzer. Remove the power cable.
7
Disconnect the disk drive cable and reinstall the disk drive in the mainframe.
8
Reconnect the disk drive cable and install the cover on the mainframe.
Troubleshooting
To test the flexible disk drive voltages
5–26
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