Hi all.
I picked up a Fluke 29 Series II in great condition. It had the common fault with the LCD zebra connections, which was easily fixed.
However, the meter has a strange issue, where some modes do not work.
Volts DC, Millivolts DC and Ohms/Capacitance ranges work perfectly. The issue is with VAC, Hz, Continuity and Amps ranges.
VAC: Displays a random Ohms reading, where probes do nothing.
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)
Hz: Displays a random mV DC reading with the same value as above and probes do nothing.
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)
VDC: Works perfect
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
mV DC: Works perfect
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
Ohms / Capacitance: Works perfect
![ThumbsUp :-+](https://www.eevblog.com/forum/Smileys/default/icon_smile_thumbsup.gif.pagespeed.ce._JElyJQqdB.gif)
Continuity: Displays an Ohms range, which probes have some effect. No continuity.
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)
Amps: Displays a VDC range, which probes have some effect, but not volts or current.
![ThumbsDown :--](https://www.eevblog.com/forum/Smileys/default/icon_thumbsdown.gif.pagespeed.ce.D027Y9gZ7m.gif)
I've had a look at the range switch, but cant see any obvious issues. No poking about will make these issues go away. I haven't took it off yet as that might be a last resort, but I'm not convinced the range switch is at fault.
Anyone have any ideas what this could be or seen this or a similar issue before on a Fluke? Maybe the microcontroller is at fault? Some photos are below.
![](http://m0ukd.com/static/temp/Fluke29_1.jpg)
![](http://m0ukd.com/static/temp/Fluke29_2.jpg)
![](http://m0ukd.com/static/temp/Fluke29_3.jpg)
Cheers, John.