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Agilent L4411A Multimeter teardown

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coromonadalix:
If i search for   Agilent KOM PPC405

it show  a few threads here



The sad thing about the meter is the java version needed for the web page interface, mostly the instrument  "web control section" says  no java found   but i'm at the latest v8 xxx version

 :(

HighVoltage:
If your Java version is too new it will not work. I had this problem on a different Agilent instrument and had to downgrade Java for it to work. I do not remember the details but it was totally stupid.

coromonadalix:
yeah  thks 

That's what i think ....

NNNI:

--- Quote from: coromonadalix on November 02, 2022, 10:45:12 am ---Shield plate removed

U302  Agilent  !ng4-0001   ASIC ?

A very high placed  crystal,  you sdont see it well  but it's lifted  5 mm  over the pcb  surface,  strain relief ??

A beautiful  LM399  reference

Some smt resistors, precision ??  R300 and R500

U700  an Xilinx Spartan  XC3S200

U505  AD9200A   10 bit 20mps AD converter 
https://www.analog.com/media/en/technical-documentation/data-sheets/AD9200.pdf

U506  AD9283   8-Bit, 50 MSPS/80 MSPS/100 MSPS
https://www.analog.com/media/en/technical-documentation/data-sheets/ad9283.pdf

U503  AD829   
https://www.analog.com/media/en/technical-documentation/data-sheets/ad829.pdf

--- End quote ---

I recently got one of these and would like to take a peek under the hood. I removed the one screw visible that was holding the shield in place, but looks like there are some hooks that go under the PCB. How did you manage to remove it?

coromonadalix:
the shield plate if i remember slide the opposite way of the screw

when it stop,  carefully lift the plate

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