Agilent Technologies Video Gaming Accessories Agilent Technologies Video Gaming Accessories User Manual

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Chapter 5 Service
Self-Test Procedures
99
5
606
Rundown gain out of range This test checks the nominal gain between the
integrating ADC and the U17 on-chip ADC. The nominal gain is checked to
±10% tolerance.
607
Rundown too noisy This test checks the gain repeatability between the
integrating ADC and the U17 on-chip ADC. The gain test (606) is performed
eight times. Gain noise must be less that
±64 lsb's of the U17 on-chip ADC.
608
Serial configuration readback failed This test re-sends the last 3 byte
serial configuration data to all the serial path (SERDAT, SERBCK, SERCLK).
The data is then clocked back into U18 on the top board and compared against
the original 3 bytes sent. A failure occurs if the data do not match. This tests
checks the serial data path through U22.
624
Unable to sense line frequency This test checks that the LSENCE logic
input U17 is togging. If no logic input detected, the power supply will assume
a 50 Hz line operation for all future measurements.
625
I/O processor did not respond This test checks that communications can
be established between U17 and U4 through the optically isolated (U6 and U7)
serial data link. Failure to establish communication in either direction will
generate an error. If this condition is detected at power-on self-test, the power
supply will beep and the error annunciator will be on.
626
I/O processor failed self-test This test causes the earth referenced
processor U4 to execute an internal, ram test. Failure will generate an error.
630
Fan test failed This test checks if the fan current is flowing. If the current
is not detected at power-on self-test, the power supply will beep and the error
annunciator will be on.Fan test fail could likely induce overtemperature
condition in the power supply.
631
System DAC test failed This test checks if the DAC hardware is functional.
The main controller U17 sends a reference voltage data to DAC and converts
the DAC output to digital data to see if the digital data is within a valid range.
632
Hardware test failed This test checks the the status of voltage and current
error amplifiers for the power circuit. If both amplifiers are not operational,
the power supply will beep and the error annunciator will be on.

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