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Agilent E4432b unlevel issue again

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Kean:

--- Quote from: Ordinaryman1971 on June 12, 2019, 05:22:58 am ---The screens are both fully turned on, all the pixels are black.

--- End quote ---

Sounds like an LCD contrast control issue.
Maybe watching Dave struggle with something similar will help you diagnose

Ordinaryman1971:
In my case they are both exact fit for this application. When the screen was installed back in the original frame it didn’t work either so... something went bad.
The service manual says something about the reset after the screen replacement, I just wonder what do they mean by that

Kean:
I don't have an ESG, so I'm not familiar enough with the internals to give much guidance.
LCD's generally go dark because they are either not getting initialised properly, or the contrast settng is wrong.
Both are typically cabling/connection issues - especially if you're seeing other signs of life from the unit.

roxbox:

--- Quote from: TheSteve on May 26, 2019, 05:58:44 am ---I ran these commands to change only the frequency range to 4 GHz:

SERV:PRODUCTION:CAL:BEGIN;
SERV:PRODUCTION:CAL 165,2,4000000000.000000;
SERV:PRODUCTION:CAL:END;
SERV:PRODUCTION:CAL:STORE 165;
SERV:PRODUCTION:CAL:PUP;

My units reports as "Hewlett-Packard, ESG-D2000B, US38440280, B.03.86"

--- End quote ---

read
:serv:prod:cal? 165,2;


set E4436B start and end freq
:serv:prod:cal:begin;
:serv:prod:cal 165,1,25000.000000;
:serv:prod:cal 165,2,4000000000.000000;
:serv:prod:cal:end;
:serv:prod:cal:store 165;
:serv:prod:cal:pup;

set freq cal table.

the last freq has to be put in two locations to mark end of freq list.

:serv:prod:cal:begin;
:serv:production:cal 65,0,25000;
:serv:production:cal 65,1,50000;
...
:serv:production:cal 65,115,3960100000;
:serv:production:cal 65,116,3980100000;
:serv:production:cal 65,117,4000000000;
:serv:production:cal 65,118,4000000000;
:serv:production:cal:end;
:serv:production:cal:store 65;
:Serv:production:cal:pup;

Then I ran TME Power Level Accuracy (Adjustment)

seems that when it switches from the power meter to the specan that it starts at freq 100000 and not 25000!

I will look for another setting related to the start freq.

vladsol:
Could you share the dumps of U106 and U107?

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