Products > Test Equipment
Fluke 8060A Somewhat Functional
AVGresponding:
Also, don't get IPA in the fuses; someone in another thread, on an Agilent 12-something or other did and it ruined them.
vindoline:
--- Quote from: Christine1953 on May 10, 2024, 02:25:31 pm ---
--- Quote from: vindoline on May 10, 2024, 11:27:16 am ---Check the input protection MOVs. They look like little colored resistors in the bottom right of the PCB. I have found that if the meter is briefly overloaded (easy to imagine in a broadcast setting) they increase in resistance and cause all kinds of weird and wonderful accuracy problems.
--- End quote ---
Are these guys the ones you're talking about in the protection circuit? I think I read something about when you're on the 200mv or 2v settings this circuit is bypassed??? Could we just jumper around the protection circuit to test? As I said in my last post, both the 200mv, and 2v sections are working correctly, at least with DC. As for checking the MOV's if they're good/bad, I'd have no idea how to do that.
To be honest, I've suspected something might be amiss here, as I remember another tech telling me the meter stopped working while he was poking around in the high voltage section of a CRT monitor. The DOA part came right after as we were trying to figure out what happened to the meter. It just completely quit working. My guess it was two unrelated problems. Let me know your thoughts. Thanks!
--- End quote ---
Yes, components J1 to J4. They should be essentially short circuit under normal circumstances. They go permanently high resistance if exposed to high voltage. You should be able to jumper them to test, or just test the resistance with another meter.
robert.rozee:
--- Quote from: vindoline on May 11, 2024, 01:03:34 pm ---Yes, components J1 to J4. They should be essentially short circuit under normal circumstances. They go permanently high resistance if exposed to high voltage. You should be able to jumper them to test, or just test the resistance with another meter.
--- End quote ---
if you are talking about RJ1 to RJ4 in the below schematic, these should all measure open-circuit:
cheers,
rob :-)
vindoline:
--- Quote from: robert.rozee on May 11, 2024, 02:06:08 pm ---
--- Quote from: vindoline on May 11, 2024, 01:03:34 pm ---Yes, components J1 to J4. They should be essentially short circuit under normal circumstances. They go permanently high resistance if exposed to high voltage. You should be able to jumper them to test, or just test the resistance with another meter.
--- End quote ---
if you are talking about RJ1 to RJ4 in the below schematic, these should all measure open-circuit:
cheers,
rob :-)
--- End quote ---
Must be poor memory on my part! Thanks. Of course, if I actually looked at the schematic, that would have been obvious!
Christine1953:
First off, thanks everyone! It looks like I have my work cut out for me over the next day or two. I'm taking today off (spring cleanup in the Northwoods). So tomorrow, I'll start working on the list I've created, which is long... Maybe we can all look at the results and a light bulb will go on. I keep getting the sensation that I'm overlooking something basic, but I've been down this road before many times, and all of a sudden you have this "a-ha" moment LOL!
Here's my list and feel free to add to it if you see something missing.
Clean the main board with the fuses removed with IPA.
Check to see MOV's read like they're "open" (infinite resistance).
Fix or bypass DC barrel.
Check functions on, AC/DC volts, AC/DC current, and top row buttons, at least for LCD function at this point.
Put together a BOM for the electrolytic caps and order from digikey
Order a new set of probes. (Just because I deserve something out of this).
Everyone have a great weekend, and I'll be in touch Mon or Tues. And, feel free to post, I'll be checking the thread through the weekend.
Thanks for the encouragement and support!
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