5 Service Guide
56 Keysight U8001A/U8002A User’s and Service Guide
Self-Test Procedures
Power-on self-test
Each time the power supply is powered on, a set of self-tests are performed.
These tests check that the minimum set of logic and measurement hardware are
functioning properly.
Unit fails self-test
Verify that the correct power-line voltage setting is selected. Also, ensure that all
terminal connections are removed while the self-test is performed. Please refer to
Appendix A: List of Error Codes for list of error codes.
Line Voltage Fuse Rating
indicator for U8001A
Line Voltage Fuse Rating
indicator for U8002A
The authorised personnel will mark the fuse rating indicator printed on the rear
panel each time the fuse is changed.
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