HP 16500B - Manual (Page 69)

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