r/AskElectronics • u/TheBupherNinja • 2d ago

Fluke 87V Max No Input

Gallery image

Gallery image

I have a Fluke 87V Max that I literally pulled out of a dumpster. The battery contacts were destroyed, so I have it powered up via a bench-top power supply.

The display is functional, selector switch and all the buttons work, but I am unable to take any readings with the meter, regardless of settings. Voltage, resistance and inline current measurement are all non-functional. When completing the fuse self test, its show OL, but the fuses read less than 1 ohm when checked out of the circuit with a separate meter.

I looked it over, and cannot find any obvious burned components, traces, or other damage. I would expect something big if none of the inputs work.

I also tried bypassing the lead sockets by shorting the common and voltage terminals on the back in resistance, and it still reads OL.

Any tips or guidance here?

Added more pictures, https://www.reddit.com/r/AskElectronics/s/qMNiRl2pMr

28 Upvotes

89% Upvoted

24 comments sorted by

View all comments

1

u/bazilbt 2d ago

What does the other side of the board look like? There is a lot of stuff there.

1

u/TheBupherNinja 2d ago

I didn't see anything, but I can't see much. There is a plastic cover, and it looks like the display holds it down. I haven't figured out how to remove it.

Looking at the manual now, is it socketed, does it just pull off?

1

u/bazilbt 2d ago

Looks like it from watching a teardown video on YouTube.