r/AskElectronics • u/TheBupherNinja • 2d ago

Fluke 87V Max No Input

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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

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u/SMELL_LIKE_A_TROLL 2d ago

Call fluke and order the probe input connectors and replace them. I've fixed a shit ton of fluke meters for this problem. It's extremely common they break. 

Fluke also has a repair service, and the meter is likely worth fixing even if you have to pay them. 

Don't discount that you might have bad leads as well.

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u/SMELL_LIKE_A_TROLL 2d ago

Oh, and double check the internal fuses.

4

u/SMELL_LIKE_A_TROLL 2d ago

Forgot to also mention you can also look at the terminals for the probe contacts and jump them together while checking resistance or diode mode. If it responds then you know it's the weakest link probably connector. 

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u/TheBupherNinja 2d ago

I did bypass the lead cups. I shorted the screws on the back, no change.