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Service Addendum8
Chapter 3 Differences
Signature Analysis
Signature analysis (SA) troubleshooting for the secondary circuits on the A1
main circuit board is ++NOT++ available for the Agilent E4350B unit. However,
GPIB and front panel signature analysis is available as described
in chapter 3 of the Service Manual.
Self-Test Error Codes/Messages
Table 3-2. Self-Test Error Codes/Messages
Code/Message Description Probable Cause
E1 FP RAM
E2 FP ROM
E3 EE CHKSUM
E4 PRI XRAM
E5 PRI IRAM
E6 PRI ROM
E7 GPIB
E8 SEC RAM
E9 SEC ROM
E10 SEC 5 V
E11 TEMP
E12 DACS
E30 SEC DAC
E31 SEC DAC
E32 SEC DAC
E45 SEC IO
E46 SEC NVRAM
Front panel RAM test failed
Front panel ROM test failed
Front panel EEPROM checksum failed
Primary interface external RAM test failed
Primary interface internal RAM test failed
Primary interface DOM test failed
GPIB interface test failed
Secondary interface RAM test failed
Secondary interface ROM test failed
Secondary interface 5 volt readback test failed
Ambient temperature readback test failed
CV or CC DAC test failed
Secondary interface DAC test failed
Secondary interface DAC test failed
Secondary interface DAC test failed
Secondary interface I/O test failed
Secondary interface nonvolatile RAM test failed
Microprocessor A3U3 defective
ROM A3U4 or address latch A3U8 defective
Possibly due to power loss during a write operation. See
checksum Error Recovery on page 3-3 in the Operating
manual. If power loss is not the problem, EEPROM A3U6
could be defective (after replacing U6, supply must be
initialized and calibrated).
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
Talker/Listener chip A2U117 defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
A5 DSP board defective
Note: The following error messages can appear due to a failure occurring either while the power supply is operating or during self test.
SERIAL TIMEOUT
SERIAL DOWN
UART PARITY
UART FRAMING
UART OVERRUN
SBUF OVERRUN
SBUF FULL
STK OVERFLOW
EE WRITE ERR
SECONDARY DN
Serial data line failure on GPIB board
Serial data line failure on GPIB board
Uart failed on GPIB board
Uart failed on GPIB board
Uart failed on GPIB board
Serial buffer failure on GPIB board
Serial buffer failure on GPIB board
Stack overflow failure on DSP board
EEPROM write failure on front panel board
Serial data line failure on DSP board
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
A2 GPIB board defective
A5 DSP board defective
EEPROM A3U6 defective or calibration error
A5 DSP board defective