Fluke 8060A switch trouble - Page 1
Forum section: electronics / repair

author: vindoline
author_rank: Unknown
timestamp: August 05, 2014, 07:46:24 pm
content: I have a Fluke 8060A multimeter that needs some help. Hopefully Dr. Taylor can shed some light. It's a recent eBay purchase described as "won't power up." Cosmetically, it was very clean and inside I easily found several old electrolytics that had "given up the ghost." At this point, the meter powers up fine, passes the power-on self test and appears to be working. Yea!Not so fast. I've found that the range push-buttons are not being recognized correctly. Specifically, on performing the "switch decoding self-test" described on p. 5-22 of the manual, the 200 uA range switch and the 2000 mA range switch are both recognized as the 200 mA range setting. The 2 mA and 20 mA ranges decode correctly. I've tried cleaning the switches with De-Oxit without luck. I've also removed and re-seated the main measurement acquisition chip. I'd be grateful for any ideas.

author: retiredcaps
author_rank: Super Contributor
timestamp: August 05, 2014, 08:04:31 pm
content: I don't know if this will help or not, but usually when the caps on the 8060A go bad, they spew out their electrolyte from the bottom onto the pcb and can wick their way up onto other components. A good IPA cleaning with a toothbrush and thorough drying might help?PS. Did you clean main IC with IPA?Seehttp://mrmodemhead.com/blog/fluke-8060a-repair/

author: vindoline
author_rank: Unknown
timestamp: August 06, 2014, 02:21:12 am
content: Quote from: retiredcaps on August 05, 2014, 08:04:31 pmI cleaned it pretty well with IPA when I replaced the caps. I'll give it a second bath and see if that clears it up.

author: lowimpedance
author_rank: Super Contributor
timestamp: August 06, 2014, 03:31:42 am
content: Not sure if this helps, but DrTaylor did reply to a question kind of similar in the 'old Fluke multimeter' thread, see below top post on P12.https://www.eevblog.com/forum/testgear/old-fluke-multimeters/165/

author: vindoline
author_rank: Unknown
timestamp: August 06, 2014, 03:26:30 pm
content: Quote from: lowimpedance on August 06, 2014, 03:31:42 amThanks for the suggestions and pointing me to Dr. Taylor's earlier post. Unfortunately, I've narrowed down the trouble to mechanical failure in one or more of the switches. I'm afraid this unit may be a parts donor now

author: Excavatoree
author_rank: Frequent Contributor
timestamp: August 06, 2014, 04:55:44 pm
content: Quote from: vindoline on August 06, 2014, 03:26:30 pmI might have an 8060 with a corroded main board (too many years with capacitor goo on it) with a good switch assy. (well, I suppose I don't know for sure) If I have one, you're welcome to it if you want to try changing the switch assy. Let me know if you're interested and I'll dig it up.I know Retiredcaps and Modemhead repair these boards, but once the get as far gone as a couple of mine are, I don't see the point. Especially when I don't have enough LCDs to go around. (or buttons, LOL)

author: vindoline
author_rank: Unknown
timestamp: August 06, 2014, 11:18:22 pm
content: Quote from: Excavatoree on August 06, 2014, 04:55:44 pmThat's really generous of you. If you can find the damaged unit, I'll give the transplant a try (nothing to loose!). Send me a pm and I'll give you my contact info.