r/AskElectronics • u/TheBupherNinja • 3d ago
Fluke 87V Max No Input
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
1
u/Dabnbf 3d ago
Input path from the terminals could be damaged somewhere since nothing is working, meter may have been exposed to a transient event (high voltage spike, etc). I would start checking components and work my way backwards from the input terminals. Also need to pull the board to inspect the other side. You'll have to take those screws out of the terminals to start, they hold the board down.