dead keithley 2001 multimeter - Page 1
Forum section: electronics / repair

author: harrimansat
author_rank: Regular Contributor
timestamp: March 14, 2015, 05:51:22 pm
content: New stuff to repair, I think that is impossible job...

author: JohnnyBerg
author_rank: Frequent Contributor
timestamp: March 14, 2015, 06:07:23 pm
content: Doesn't look that impossible ..

author: Smith
author_rank: Frequent Contributor
timestamp: March 14, 2015, 06:22:05 pm
content: No it doesn't. I repaired much worse.Damn caps

author: TiN
author_rank: Super Contributor
timestamp: March 15, 2015, 05:13:49 am
content: Welcome, you come right place.Join us athttps://www.eevblog.com/forum/testgear/restoration-glory-of-keithley-2001-dmm/1. As first step - remove ALL electrolytic capacitors on analog board. Use low temperature for soldering iron (240-260°C) since there are no polygons and it's easy to peel off pads even with little overheat.2. Clean all electrolyte on board with clean alcohol. In most contaminated parts best to remove components (desolder), clean everything and then solder back. Clean any flux after soldering.3. Make few photos of cleaned board with damages, and get ready to spend some time to repairing connections. Beware via holes, sometimes they got open too. You can reference my schematics recovery projecthereandhere for items in works4. After fixing damages, try to power on and measure power voltages. Check if anything heating up too much. If everything seem well, run selftest and check errors (MENU/GENERAL/TEST/BUILT-IN_TEST)Or you can sell your 2001 to somebody who fixing 2001's in thread and need it, if you don't have time/wish to mess with lots of repair work.

author: harrimansat
author_rank: Regular Contributor
timestamp: December 06, 2019, 08:08:55 pm
content: Magic smoke...

author: Kjelt
author_rank: Super Contributor
timestamp: December 06, 2019, 08:21:15 pm
content: Oh nothat looks like a game over

author: MadTux
author_rank: Frequent Contributor
timestamp: December 06, 2019, 10:15:41 pm
content: Lol, waited like 4years to finally let the magic smoke outSucks, if that happens on 4layer board, btw.On dual layer, it's easy work, dremel out bad spot and epoxy in new piece of PCB and dremel out new traces with sharp router bit.

author: Kjelt
author_rank: Super Contributor
timestamp: December 06, 2019, 10:17:33 pm
content: Quote from: MadTux on December 06, 2019, 10:15:41 pmPerhaps he worked 4 years on this project, day in day out and then ....

author: chekhov
author_rank: Regular Contributor
timestamp: December 07, 2019, 05:02:52 pm
content: Video was uploaded 4 years ago, but I'm curious about the destiny of this unit.

author: TiN
author_rank: Super Contributor
timestamp: December 07, 2019, 05:40:48 pm
content: Me too. Mystery 2001.

author: harrimansat
author_rank: Regular Contributor
timestamp: December 08, 2019, 05:59:30 pm
content: Is still for repair, now I have schemes, but it would be helpful to know where these pins are connected. And some board photo with backlight.

author: TiN
author_rank: Super Contributor
timestamp: December 08, 2019, 06:23:33 pm
content: I would start from desoldering everything contaminated by electrolyte and deep cleaning the board. Use fume extractor and don't breathe in the vapors.Worry about connections and burned areas later, when board is clean.