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
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 data line failure on GPIB board | A2 | GPIB board defective |
SERIAL DOWN | Serial data line failure on GPIB board | A2 | GPIB board defective |
UART PARITY | Uart failed on GPIB board | A2 | GPIB board defective |
UART FRAMING | Uart failed on GPIB board | A2 | GPIB board defective |
UART OVERRUN | Uart failed on GPIB board | A2 | GPIB board defective |
SBUF OVERRUN | Serial buffer failure on GPIB board | A2 | GPIB board defective |
SBUF FULL | Serial buffer failure on GPIB board | A2 | GPIB board defective |
STK OVERFLOW | Stack overflow failure on DSP board | A5 | DSP board defective |
EE WRITE ERR | EEPROM write failure on front panel board | EEPROM A3U6 defective or calibration error | |
SECONDARY DN | Serial data line failure on DSP board | A5 | DSP board defective |
8 | Service Addendum |
