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