Error Messages 4
E364xA User’s and Service Guide 161
Self-Test Error Messages
Table 4-2 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 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 U11. 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 U16 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 U17
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 U17
on-chip ADC. The nominal gain is checked to a ±10% tolerance.
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