32 Keysight E4980A/E4980AL Precision LCR Meter
Troubleshooting
Power On Sequence Troubleshooting
4-
Power On Sequence Troubleshooting
Check the Line Voltage and Fuse
Check the main power line cord, power fuse, and actual line voltage to see that
they are all correct. For more information about the line cord and power fuse,
see the Power Requirements in Appendix B.
Check the Power Supply Unit Output
Step 1. Remove the E4980A/ E4980AL’s outer cover.
Step 2. Turn the E4980A/ E4980AL power on.
Step 3. Measure the output voltage (+3.3, +5, +12, -12 V) of the power supply unit
using a voltmeter with a small probe. The location of each voltage connector
on the A1 board and A3 board is shown in Figure 4-2.
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