Agilent Technologies E3634A, E3633A Self-Test Procedures, Power-On Self-Test, Complete Self-Test

Chapter 5 Service

Self-Test Procedures

	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. The power-on self-test performs checks 601 through
	604 and 624 through 632.
	Complete Self-Test
	Hold any front panel key except the ‘‘Error’’ key for more than 5 seconds while
	turning on the power to perform a complete self-test. The power supply beeps
	when the test starts. The tests are performed in the order shown below.
601	Front Panel Does not respond The main controller U19 attempts to
	establish serial communications with the front panel controller U1 on the front
	panel board. During this test, the U1 turns on all display segments.
	Communication must function in both directions for this test to pass. If this
	error is detected during power-on self-test, the power supply will beep twice.
	This error is only readable from the remote interface.
602	RAM read/write failed This test writes and reads a 55h and AAh checker
	board pattern to each address of ram U14. Any incorrect readback will cause
	a test failure. This error is only readable from the remote interface.
603	A/D sync stuck The main controller issues an A/D sync pulse to U19 and U20
	to latch the value in the ADC slope counters. A failure is detected when a sync
	interrupt is not recognized and subsequent time-out occurs.
604	A/D slope convergence failed The input amplifier is configured to the
	measure zero (MZ) state in the 10 V range. This test checks whether the ADC
	integrator produces nominally the same number of positive and negative slope
	decisions (±10%) during a 20 ms interval.
605	Cannot calibrate rundown gain This test checks the nominal gain between
	integrating ADC and the U19 on-chip ADC. This error is reported if the
	procedure can not run to completion due to a hardware failure.

104