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| Bricked Fluke 177 |
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| andyB2022:
Hi! My Fluke 177 doesn't want to work any more. The idiot me just tried to measure it own current draw from it's own 9V battery via the 400mA range.... Bodged some cables around the battery connector tried to test the current, had no luck, placed back the battery and now it's dead... I know I'm an idiot... Do you guys know any solve for this? The microcontroller seems to work as the full display is lit while pressing the HOLD Key, PoFF and LoFF seem to work too... Please watch the video below to better understand... https://youtu.be/1-nA6hS6c2E |
| Per Hansson:
Sorry to hear that, you can take a look at these threads, might be some valuable information in them for your case, especially the first one: https://www.eevblog.com/forum/testgear/fluke-177-failed-and-need-support-to-repair/ https://www.eevblog.com/forum/testgear/dmm-reading-it_s-own-battery-voltage-low-voltage-detection/ https://www.eevblog.com/forum/testgear/fluke-87v-_bricked_-when-probing-own-battery/ |
| andyB2022:
Thank you for your tip. Looks like the DMM is pure trash.... such an expensive mistake... |
| Per Hansson:
I would inspect each component with good light under magnifying glass, if you are lucky there will be some external component that took the damage and saved the ASIC. There was at least one example provided in the first thread. And you know the EE mantra: tho shall measure voltages! :) |
| andyB2022:
I've checked all regulators, I have (referenced to GND battery) 2.5V 3.3V 5V, all steady... One thing that caught my attention was the bridge rectifier than on the AC side is open, and on DC side measures 1.7V which seems okay. (Out of circuit of course) Also reading the first thread I can't find the -2.5V supply. |
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