Teardown : HP 4263B LCR Bridge meter (and repair)

[picburner]

@ RikV

Do you have a device that has failed or do you want to buy a failed device to try to repair it?
Failures in the analog section are usually repairable but if the failure is a custom component in the digital section, as you have already understood, then the problem is serious, solvable only by replacement from a donor instrument.
Also, due to the too synthetic documentation, it would be necessary to have a second working instrument to speed up the discovery of the failed part.
In my 4363B I only replaced some electrolytic capacitors and upgraded to opt. 001 and 002, so I did not do too complicated repairs.

[coromonadalix]

Hi Forum,

I have a HP 4338B Miliohm meter, which looks similar to this HP4263B LCR.
Do you think it would be possible to upgrade the miliohm meter into LCR meter?

Br.
Axel

see here the video,        i would say  not possible,  not the same internals

[Aheld]

Thank you,
I didn't was aware of this nice video documentation!

Br.
Axel

[RikV]

These are fundamentally different instruments. They originate from the same "style" made by HP&Co, meaning they have many metalware and hardware parts in common and thus essentially reduce the BOM of HP's factories and reduce engineering cost. But functionally they are completely different. I guess that -eventually apart from the display/keyboard and power supply- they have nothing in common.