Technical data

Error Messages 4
Self-Test Error Messages
E364xA User’s and Service Guide 131
Self-Test Error Messages
The following errors indicate failures that may occur during
a self- test. Refer to Chapter 8, “Service and Maintenance”
for more information.
Table 4 - 2 Self-test error messages
601 Front panel does not respond
The main controller U121 (U10 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 the 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 U125. 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 U121 and U130 to latch the value in the ADC slope
counters. A failure is detected when a sync interrupt is not recognized and subsequent timeout 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 the ADC and the U121 on-chip ADC. This error is
reported if the procedure can not run to completion due to a hardware failure.
606 Rundown gain out of range
This test checks the nominal gain between the integrating ADC and the U121 on-chip ADC. The nominal
gain is checked to a ±10% tolerance.
607 Rundown too noisy
This test checks the gain repeatability between the integrating ADC and the U121 on-chip ADC. The gain
test (606) is performed eight times. Gain noise must be less than ±64 LSB of the U121 on-chip ADC.