Agilent Technologies 66332A Specific Troubleshooting Procedures, Power-on Self-testFailures

Troubleshooting - 3

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,	A2	Interface Bd
	ADC U242 is checked for 133 +/- 7 counts
E12	12 bit DAC test failed, 4095 is written to DAC U241A	A2	Interface Bd
	and 0 to B, ADC U242 is checked for 71 +/- 7 counts
E13	12 bit DAC test failed, 0 is written to DAC U241A and	A2	Interface Bd
	4095 to B, ADC U242 is checked for 71 +/- 7 counts
E14	12 bit DAC test failed, 4095 is written to DAC U241A	A2	Interface Bd
	and B, ADC U242 is checked for 10 +/- 7 counts
E15	8 bit DAC test failed, 10 and 240 are written to DAC	A2	Interface Bd
	U244, ADC U242 is checked for 10 and 240 +/- 7 counts
E80	Dig I/O test failed, SEC_PCLR written low and high,	A2	Interface Bd
	read back through Xilinx
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

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