Agilent Technologies 856290216 service manual Procedure 15. Eerom A2U500

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