Fp Rom, EE Chksm, PRI Xram, PRI Iram, E6 PRI ROM

Table 3-2. Selftest Error Codes/Messages

	Code and/or	Description	Probable Cause Selftest Error
	Message		Codes/Messages
El FP RAM		Front panel RAM test failed (power-on).	Microprocessor AlU3
E2	FP ROM	Front panel ROM test failed (power-on	ROM AlU4 or address latches AlU8
		and *TST?).
E3	EE CHKSM	Front panel EEPROM checksum test failed	Possibly due to power loss during a write
		(power-on and *TST?).	operation. See Checksum Errors in Chapter 3 of
			Operating Manual. If power loss is not the problem,
			EEPROM A1U6 could be defective. (If you replace
			AlU6, the power supply must be reinitialized and
			calibrated.)
E4	PRI XRAM	Primary interface external RAM test failed	RAM A2U108
		(power-on).
E5	PRI IRAM	Primary interface internal RAM test failed	Microprocessor A2U114
		(power-on).
E6 PRI ROM		Primary interface ROM test failed	ROM A2U106
		(power-on and *TST?).
E7	GPIB	GPIB interface test failed (power-on).	Talker/listener A2U117
E8	SEC RAM	Secondary interface RAM test failed	Microprocessor Al0U506
		(power-on).
E9	SEC ROM	Secondary interface ROM test failed	Microprocessor Al0U506
		(power-on and *TST?).
E10 SEC 5V		Secondary interface 5 volt readback test	Comparators Al0U516, Al0U517 readback DAC
		failed (power-on and *TST?).	A10U512/U515, or secondary bias supply (5Vs
			A4U304)
E11 TEMP		Ambient temperature readback test failed	Thermistor Al0RT500 or comparator
		(power-on and *TST?).	Al0U517
E12 DACS		CV or CC DAC tests failed (power-on).	CV DAC Al0U510/U513 or CC DAC
			A10U511/U514 (see Figure 3-7).

NOTE: The following error messages can appear due to a failure occurring either while the power supply is operating or during selftest.

SERIAL TIMOUT	Serial data line failure on A2 board.	See Figure 3-10 (system) or Figure 3-11 (bench).
SERIAL DOWN	Serial data line failure on A2 board.	See Figure 3-10 (system) or Figure 3-11 (bench).
UART PARITY	UART failed.	UART A2U112
UART FRAMING	UART failed.	UART A2U112
UART OVERRUN	UART failed.	UART A2U112
SBUF OVERRUN	Serial buffer failure UART.	UART A2U112 defective or GPIB board is in SA
		mode
SBUF FULL	Serial buffer failure.	UART A2U112 defective or GPIB board is in SA
		mode
EE WRITE ERR	EEPROM write failure.	EEPROM AlU6 defective or calibration error
SECONDARY DN	Serial data line failure on Main board.	See Figure 3-12.

Agilent Technologies 6683A, 6684A Fp Rom, EE Chksm, PRI Xram, PRI Iram, E6 PRI ROM, Gpib, Sec Ram