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| Digital Angle Gauge won't reset after battery change... |
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| DavoDavo:
--- Quote from: z3t4 on June 06, 2012, 11:28:50 AM --- --- Quote from: DavoDavo on June 05, 2012, 10:10:32 PM --- thus buggering it. :zap: --- End quote --- Indeed. Have you tried it in the freezer for a couple of hours/overnight? --- End quote --- I'll give that a try, nothing else has worked so far. Thanks for the suggestion. |
| spuddevans:
Just another thought, the battery contacts may also need a really good cleaning. I've had a similar thing happen to my cheap digi-vern and I had to scrape the battery contacts with a file and then give them as good a clean as I could with electrical contact cleaner and an eraser. That worked for me, might be worth trying :scratch: Tim |
| DavoDavo:
--- Quote from: spuddevans on June 07, 2012, 04:45:44 AM ---Just another thought, the battery contacts may also need a really good cleaning. I've had a similar thing happen to my cheap digi-vern and I had to scrape the battery contacts with a file and then give them as good a clean as I could with electrical contact cleaner and an eraser. That worked for me, might be worth trying :scratch: Tim --- End quote --- Thanks, but I pulled the back off the thing ages ago and attached the battery direct to the bare wires, didn't help at all. :( |
| kwackers:
I think it looks like you've exhausted all reasonable possibilities... So at this point I'd strip it. Have a good look over it with a strong magnifying glass, in particular look for tin 'whiskers' shorting stuff out. Perhaps even give it a stiff brush with a non-conductive brush in case there's some I missed. (Obviously if you've got the 'knowledge' there's other stuff you could do - checking crystals etc) If that doesn't work, I'd check out whatever the sensor is and consider using it in something else. :dremel: |
| DavoDavo:
--- Quote from: kwackers on June 07, 2012, 05:16:21 AM ---I think it looks like you've exhausted all reasonable possibilities... So at this point I'd strip it. Have a good look over it with a strong magnifying glass, in particular look for tin 'whiskers' shorting stuff out. Perhaps even give it a stiff brush with a non-conductive brush in case there's some I missed. (Obviously if you've got the 'knowledge' there's other stuff you could do - checking crystals etc) If that doesn't work, I'd check out whatever the sensor is and consider using it in something else. :dremel: --- End quote --- Yep, tried everything. There was a bit of flux around the press-button solder contacts on the back of the PCB and I cleaned that off - didn't make any difference of course... Problem is it looks like I can't get the PCB assembly out of the case without destroying something. It seems to be held in with four screws, which I removed, but although the PCB moves a little where the buttons are it won't come any further. There are four more, much smaller, screws on the board but I'm not game to take those out just yet as I think they might be holding the LCD display (or maybe other components) to the board. I suspect that the display is stuck to the front of the case with some sort of strong adhesive. As suggested, I'll try the freezer trick first, but I'm not holding my breath. One thing that intrigues me is that, at the top left hand corner of the board, there are 2 small black insulated wires soldered to the board. The wire's ends are not attached to anything and where they are soldered to the board is covered with a blob of silicon (or hot glue?). I can't see if the wires are twisted together, and one is slightly longer than the other. I suspect it might be some sort of factory tweaking/calibrating adjustment? :scratch: I'll see if I can take a photo of it. |
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