Disassembly and Repair 6
Keysight 33210A Service Guide 121
628: Self-test failed; -20 dB attenuator path
629: Self-test failed; +20 dB amplifier path
These errors indicate that the specified relay is not being properly switched or the
attenuator/amplifier is not providing the expected amplification or gain. These
self-tests use the internal ADC to verify that attenuators are operating properly.
630: Self-test failed; internal ADC over-range condition
This error indicates a probable ADC failure. The failure could be of the system
ADC, the ADC input multiplexer, or the ADC input buffer amplifier.
631: Self-test failed; internal ADC measurement error
This error indicates a probable ADC failure. The failure could be of the system
ADC, the ADC input multiplexer, or the ADC input buffer amplifier.
632: Self-test failed; square/pulse DAC test failure
This error indicates a probable failure of the square/pulse DAC.
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