Agilent Technologies 1670G Series Service Manual page 151

Check for the following voltages and signals using an oscilloscope.
6
Disk Drive Voltages
Pin
1
3
5
7
9
11
13
15
17
19
21
23
25
Select Stop, and turn off the logic analyzer. Remove the power cable.
7
The test will not immediately stop when Stop is selected; it will continue until the current
iteration of the disk test is completed and then stop.
Disconnect the disk drive cable and re-install the disk drive in the logic analyzer.
8
Reconnect the disk drive cable and install the cover on the logic analyzer.
9
Signals Pin No.
+5V 2
+5V 4
+5V 6
NC 8
HD OUT (HD at HIGH level) 10
NC 12
NC 14
0V 16
0V 18
0V 20
NC 22
0V 24
0V 26
Troubleshooting
To test the flexible disk drive voltages
Signal
INDEX
DRIVE SELECT
DISK CHANGE
READY
MOTOR ON
DIRECTION SELECT
STEP
WRITE DATA
WRITE GATE
TRACK 00
WRITE PROTECT
READ DATA
SIDE ONE SELECT
5–25