Agilent Technologies 1680 series, Service Manual

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Chapter 5: Troubleshooting
Troubleshooting the Agilent 1680A,AD-series
To test the LCD display signals
Before attempting to do this procedure, ensure that the video signal cable
connected to the PCI video board is properly seated. Attempt to reseat the cable
two or three times. If other repairs were done to the instrument, and the video is
now no longer operating, it is very likely that the video cable is not properly
seated.
Refer to chapter 6, "Replacing Assemblies", for instructions to remove or replace
covers and assemblies.
WARNING:
Warning Hazardous voltages exist on the power supply and the LCD display,
and the LCD inverter. This procedure is to be performed by service-trained
personnel aware of the hazards involved, such as fire and electric shock.
1 Remove the sleeve. Refer to chapter 6 for more information on how to
remove the sleeve.
2 Connect a power cord to the instrument and apply power.
3 Using an oscilloscope, probe the following pins of J111 for digital signals.
2, 4, 5
9, 10, 11, 13, 14, 15
29, 30, 31, 33, 34, 35, 37
1
2
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