To test the flexible disk drive voltages
Refer to chapter 6, "Replacing Assemblies," for instructions to remove or replace covers and
assemblies.
WARNING
Hazardous voltages exist on the power supply, the CRT, and the CRT driver board. This
procedure is to be performed by service-trained personnel aware of the hazards involved,
such as fire and electrical shock.
Equipment Required
Equipment Critical Specification Recommended
Model/Part
Digitizing Oscilloscope > 100 MHz Bandwidth HP 54600B
1 Turn off the instrument, then disconnect the power cable. Remove the instrument
cover and the flexible disk drive.
2 Reconnect the disk drive data cable and disk drive power cable to the rear of the
disk drive. Turn the disk drive over so that the solder connections of the cable
socket are accessible.
3 Connect the instrument power cable, then turn on the instrument.
4 In the Mainframe Test menu, select the Flexible Disk Test. Insert a disk that has
enough available bytes to run the test in the disk drive, then select Run-Repetitive.
Refer to "To run the self-tests" in this chapter if you need help accessing the test menu.
Troubleshooting
To test the flexible disk drive voltages
5–24
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