Service 5
Keysight E3633A and E3634A Service Guide 119
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. For serial MY53xx6xxx, the power-on self-test utilizes the
complete self-test, which covers error codes 601 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 (U101 for serial MY53xx6xxx) attempts to establish
serial communications with the front panel controller U1 (U602 for serial
MY53xx6xxx) on the front panel board. During this test, the U1 (U602 for serial
MY53xx6xxx) 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 (on-chip RAM for serial MY53xx6xxx). 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.
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