Fluke 75 boring repair
Posted: Thu Feb 16, 2023 8:50 pm
Well finally bought some more TE. A completely deceased but mint Fluke 75 made an appearance on eBay for a whopping £17 including delivery so I nabbed it quick.
Turned up and was completely dead as expected.
Guts:
After inspection, the culprit was found and it was something really damn stupid. The CPU crystal, a little 32KHz watch crystal was bent over underneath the cover on the dividers and one leg was touching the case. This was enough to stop it oscillating entirely. Bent it back, put it back together and it works fine. Otherwise completely perfect. Even the fuses weren't jumped!
Old one on left. New one on right!
Well that was boring. Was expecting a challenge at least!
Turned up and was completely dead as expected.
Guts:
After inspection, the culprit was found and it was something really damn stupid. The CPU crystal, a little 32KHz watch crystal was bent over underneath the cover on the dividers and one leg was touching the case. This was enough to stop it oscillating entirely. Bent it back, put it back together and it works fine. Otherwise completely perfect. Even the fuses weren't jumped!
Old one on left. New one on right!
Well that was boring. Was expecting a challenge at least!
