The EEROM on A2 is used to store data for frequency response
correction, elapsed time, focus, and intensity levels. Error codes from
700 to 703 indicate that some part of the data in EEROM is invalid.
An EEROM error could result from either a defective EEROM or an
improper sequence of storing data in EEROM. Check the EEROM
with the following steps:
1. Place the WR PROT/WR ENA jumper on the A2 Controller
assembly in the WR ENA position.
2. On the spectrum analyzer, press
ICAL)
MORE 1 OF 2,
SERVICE CAL DATA, FLATNESS
,and
FLATNESS DATA. Enter a
value of 130. Press
PREV MENU, STORE DATA
, YES, and
[m).
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 3.
700 EEROM
Check-sum error of EEROM A2U501.
701 AMPL CAL
702 ELAP TIM
Check-sum error of frequency response correction data.
Check-sum error of elapsed time data.
703 AMPL CAL
Check-sum error of frequency response correction data. Default values
being used.
704 PRESELCT
Check-sum 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 Check-sum Errors (705 to 710)
The instrument power-on diagnostics perform a check-sum on each
programmed ROM (A2 Controller assembly). If an invalid check-sum
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 HP part number. Refer to Chapter 4, “Replaceable
Parts.”
Although some of these errors might result in a blanked display, it is
possible to read these errors over HP-IB. Refer to “Troubleshooting to
a Functional Section” in this chapter.
705 ROM
U306
706 ROM
U307
707 ROM
U308
Check-sum error of program ROM A2U306.
Check-sum error of program ROM A2U307.
Check-sum error of program ROM A2U308.
6-32 General Troubleshooting
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