Question about Leupold RX-IV Rangefinder
I hope you have not opened it up. Be sure the contacts in the battery compartment are clean. Leave the new battery in for a few days and keep turning it on/off. It may take a bit to fire up the CMOS which losses its memory with out power. Hope this Helps.
Posted on Apr 23, 2011
The vucalnized covering is removed to access the screws to remove the outer housing
Posted on Apr 07, 2011
AllI can suggest is that maybe the battery terminals inside the rangefinder are slightly oxidized, and may need a good cleaning. Other than that, you could be having an oxidation problem with the contacts of a switch inside the camera, which will be challenging to get to, as you know. A good contact spray that doesn't harm plastics might help, if you can get to the components. Otherwise, you may have to contact Leopold support (I couldn't find a support center on the net, so refer to your manual that came with it).
Wish I had more, but that's allI can think of, but hope it helps.
Posted on Apr 01, 2011
Hi, well being a fellow engineer then I am sure you are familiar with the fact that electronics that are NOT powered ON & cycled on/off, at least once a week, or so, well then, certain components will deteriorate, especially capacitors, very quickly over time, many simply may change their values, slightly, or not, and subsequently anything that is critical, say a timing circuit, is soon thrown out of whack, as it were. Internal Batteries if used, leak and may cause problems and so on. Often it is the "Unit" itself, that detects a "Fault" and will shut the unit down, it doesn't even have to be a major fault... but a shut down is a shut down.
I know we all see in the movies someone wipe of the dust from a computer console after a thousand years or so, and power up via the nuclear power supply, and it all jumps to life and they use it to effect the rescue... Well ONLY in the movies.
You see this is why, say, in the military, anything that is in "Moth balls" is routinely run to combat & counter, exactly, this sort of deterioration. Sure there maybe somethings that will survive longer than others but, eventually all will fail over time, if this is not done..
Now what to do? Well usually whenever I have something that's been in storage for a while, I open it up, and look for any big electrolytic caps, (Even surface mount) and replace them "on spec', Inductors must be checked, xtals too, check for any corrosion, leaks from components,.replace any batteries, check all connectors and spray with contact cleaner, sometimes contacts can develop an oxide, that I swear could insulate against a million volts ..lol.. In fact just give it the "Once Over" being particularly finicky about things and replacing anything that is even remotely suspect...
I always then thoroughly warm the entire unit up, first very gently & slowly, (In the oven actually, Sometimes, this actually FIXES it... ) after all is checked, parts replaced etc, and it's up to ambient temperature, I then apply power, via, a Current limited supply, set just above it's max draw, and switch on .. hopefully all is well.. if not well .. i am pretty sure you know what comes then.. yup troubleshooting.....
You really will need to obtain a service and repair manual to be able to effectively repair this unit, if only for those magical "Parts Numbers". & Circuit Diagrams. I have searched, however was unable to locate a copy, perhaps a direct inquiry to Leupold, will yield one, well worth a try.
usually there is a screw hidden under a label or plug, or the like.. and usually they "Clip apart"
What to do if you don't wish to DIY above.
Posted on Mar 26, 2011
Hello johan...remove the battery and use the eraser end of a common pencil to clean the contacts in the battery compartment. then reinstall the battery. often after sitting for a year, the contacts are corroded enough to cause your symptoms. joe
Posted on Mar 25, 2011
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Posted on Jan 02, 2017
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