Procedure 15. EEROM
(A2U500)
Procedure 15. EEROM (A2U500)Removal/Replacement
Caution
The EEROM is replaced with the power on. Use a nonmetallic tool to remove
the defective EEROM and install the new EEROM.
1. Turn the HP 85623
m
switch off. Remove the spectrum analyzer cover assembly and
fold out the A2, A3, A4, and A5 assemblies as described in “Procedure 5. A2, A3, A4,
and A5 Assemblies Removal,” steps 3 through 5.
2. Turn the HP 85623 (LINE) switch on.
3. Set the WR PROT/WR ENA jumper on the A2 controller assembly to the WR ENA
position.
4. Press
LCAL),
MORE
1
OF
2,
SERPICE
CAL DATA, COPY EEROM.
The spectrum analyzer
will store the contents of the EEROM into the program RAM.
5. Using a nonmetallic tool, carefully remove the defective EEROM.
6. Carefully install a new EEROM.
7. Press COPY TO
EEAOM
. The spectrum analyzer will store the contents of the program
RAM into the new EEROM.
8. Turn the HP 85623 (LINE) switch off, then on, cycling the spectrum analyzer power. Allow
the power-on sequence to finish.
9. If error message 701, 702, or 703 is displayed, press
[m),
MORE, and RECALL ERRORS.
Use the STEP keys to view any other errors.
10. If error message 701 or 703 is displayed, perform Adjustment 9,“Frequency Response
Adjustment” in chapter 2, “Adjustment Procedures.” (If a TAM is available, perform the
module “Low Band Flatness” and “High Band Flatness and YTF” adjustments. Press
(-1,
ADJUST to enter the adjust menu of the TAM.)
11.
If error message 704 is displayed, press
ISAVE),
SAVE PRSEL PK , and
(PRESEI).
12. If there are no errors after cycling the spectrum analyzer power, the EEROM is working
properly, but the frequency response correction data might be invalid. Check the
spectrum analyzer frequency response.
13. Place the WR PROT/WR
ENA
jumper in the WR PROT position.
14. Fold the A2 and A3 assemblies into the spectrum analyzer as described in “Procedure 5.
A2, A3, A4, and A5 Assemblies.” Secure the spectrum analyzer cover assembly.
Assembly Replacement 4-55