Agilent Technologies 6612B, Руководство по обслуживанию, Страница: 36 / 74

3 - Troubleshooting
36
Specific Troubleshooting Procedures
Power-on Self-test Failures
The power-on self-test sequence tests most of the digital and DAC circuits. If the supply fails self-test, the
display "ERR" annunciator will come on. You can then query the unit to find out what the error(s) are.
When an error is detected, the output is not disabled so you can still attempt to program the supply to help
troubleshoot the unit. Table 3-2 lists the self test errors and gives the probable cause for each error.
NOTE:
A partial self test is performed when the *TST? query is executed. Those tests that
interfere with normal interface operation or cause the output to change are not performed
by *TST?. The return value of *TST? will be zero if all tests pass, or the error code of the
first test that failed. The power supply will continue normal operation if *TST? returns a
non-zero value.
Table 3-2. Self-Test Error Codes/Messages
Error Code Description Probable Cause
E1 Checksum in Read-only Non-volatile ROM A2 Interface Bd
E2 Checksum in Config Non-volatile ROM A2 Interface Bd
E3 Checksum in Cal Non-volatile ROM A2 Interface Bd
E4 Checksum in State Non-volatile ROM A2 Interface Bd
E5 Checksum in RST Non-volatile ROM A2 Interface Bd
E10 RAM test failed A2 Interface Bd
E11 12 bit DAC test failed, 0 is written to DAC U241A and
B, ADC U242 is checked for 133 +/- 7 counts A2 Interface Bd
E12 12 bit DAC test failed, 4095 is written to DAC U241A
and 0 to B, ADC U242 is checked for 71 +/- 7 counts A2 Interface Bd
E13 12 bit DAC test failed, 0 is written to DAC U241A and
4095 to B, ADC U242 is checked for 71 +/- 7 counts A2 Interface Bd
E14 12 bit DAC test failed, 4095 is written to DAC U241A
and B, ADC U242 is checked for 10 +/- 7 counts A2 Interface Bd
E15 8 bit DAC test failed, 10 and 240 are written to DAC
U244, ADC U242 is checked for 10 and 240 +/- 7 counts A2 Interface Bd
E80 Dig I/O test failed, SEC_PCLR written low and high,
read back through Xilinx A2 Interface Bd
E213 RS-232 input buffer overrun A2 Interface Bd
E216 RS-232 framing error A2 Interface Bd
E217 RS-232 parity error A2 Interface Bd
E218 RS-232 UART input overrun A2 Interface Bd
E220 Front Panel comm UART input overrun A3 Front Panel/Display Bd
E221 Front Panel comm UART framing error A3 Front Panel/Display Bd
E222 Front Panel comm UART parity error A3 Front Panel/Display Bd
E223 Front Panel firmware input buffer overrun A3 Front Panel/Display Bd