Technical data

Service 2
Self-Test Procedures
E3632A Service Guide 57
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, which covers from 601 through 604 and 624 through
634. For serial MY53xx6xxx, the power- on self- test utilize
the complete self- test, which covers from 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.
Table 2 - 3 Self-test error messages
601 Front panel does not respond
The main controller U17 (U10 for serial MY53xx6xxx) attempts to establish serial communications with
the front panel controller U7 (U602 for serial MY53xx6xxx) on the front panel board. During this test, the
U7 (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. 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 U17 and U18 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.