Chapter 7 347
General Troubleshooting
Error Messages
2. On the spectrum analyzer, press CAL MORE 1 OF 2,
SERVICE CAL DATA, FLATNESS, and FLATNESS DATA.
Enter a value of 130. Press
PREV MENU, STORE
DATA, YES, and DISPLAY.
3. Press
INTEN, enter an intensity value of 90, and
press
STORE INTEN.
4. Press
MORE 1 OF 2 FOCUS, enter a focus value of
128, and press
STORE FOCUS. Turn the LINE switch
off, then on, cycling the power.
5. If errors are still present, the EEROM A2U501 is
defective. Refer to the EEROM replacement
procedure in Chapter 4 .
700 EEROM Checksum error of EEROM A2U501.
701 AMPL CAL Checksum error of frequency response correction data.
702 ELAP TIM Checksum error of elapsed time data.
703 AMPL CAL Checksum error of frequency response correction data.
Default values being used.
704 PRESELCT Checksum error of customer preselector peak data.
External preselector data recalled in internal mode, or
internal preselector data recalled in external mode. To
clear the error, press
RECALL, MORE 1 OF 2, FACTORY
PRSEL PK, SAVE, and SAVE PRSEL PK.
Program ROM Checksum Errors (705 to 710)
The instrument power-on diagnostics perform a
checksum on each programmed ROM (A2 controller
assembly). If an invalid checksum is found for a
particular ROM, an error code is generated. If a
defective programmed ROM is found, replace it with
another ROM with the same part number. Refer to
Chapter 5 , “Replaceable Parts.”
Although some of these errors might result in a
blanked display, it is possible to read these errors over
GPIB. Refer to “Troubleshooting to a Functional
Section” on page 324.
705 ROM U306 Checksum error of program ROM A2U306.
706 ROM U307 Checksum error of program ROM A2U307.
707 ROM U308 Checksum error of program ROM A2U308.
708 ROM U309 Checksum error of program ROM A2U309.
709 ROM U310 Checksum error of program ROM A2U310.
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