I am not sure if this is the right forum to ask this question or not but I will ask it anyway and take my chances. I plugged my Canon Power Shot Camera into a 9 volt dc power supply and of course the camera is rated for 3.15 volts, I wouldn't even try to explain why I did this but now my camera will not work, will not turn on and the lens is stuck out? I think my SD card is fried as will? It do not show up in my card reader? The questions are; what possible damage did I do to my Camera? Is it repairable? Where do I go for help? Is it possible to download a repair manual for this camera?
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Re: Canon Power Shot A540
Can't say for sure. Worst case scenario is one of the ICs died from the over-voltage. Best case is only if a fuse blew or a zener diode shorted.Originally posted by davg
Hard to say. Have you tried giving it proper voltage supply to see if it powers on (other than from the batteries)? If you have a multimeter, see if there's a short between ground and positive.Originally posted by davg
Other than that, you'll probably have to open the camera and look for shorted components. Basically look for a fuse or a diode near the input jack.
Tried looking on Google? I doubt anyone here will have a repair manual for this particular camera (certainly hope I'm wrong, though).Originally posted by davg -
Re: Canon Power Shot A540
Thanks Momaka appreciate your reply. The only thing I tried was to add fresh batteries but no go. I have not tried opening it up but looks as though I may have to? I have searched the web for a service manual but can't seem to find one.Comment
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Re: Canon Power Shot A540
if its still under waranty just return it saying it doesnt work
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Re: Canon Power Shot A540
hi davg i did the same thing to my canon a540 today, connected a 12 volt supply in place of 3 volt and my camera died also SD card no longer works. i got few repair manuals of different models on elektrotanya but could not locate the fuse in this model. i am curious if you were able to get ur camera working, just curious to know the fix.Comment
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Re: Canon Power Shot A540
chances are high it fried more than just a fuse. (especially because you say the SD card is also dead)
fuses are usually labelled as Fxxx on the boards.
some examples of what they could look like
http://www.google.com/search?q=smd%2...UTF-8&tbm=isch
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Re: Canon Power Shot A540
With a multimeter, check resistance between power supply input and ground. If you get a short circuit or open circuit, there may be some chances of saving it.
Also, if you have the camera already opened, take some pictures of the circuit board(s) and post them here.Comment
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Re: Canon Power Shot A540
In better news, a new motherboard for this camera should be straight-forward to find on the likes of eBay if it is fried.
Word of advice though - there is a high capacity cap inside the camera which may still be charged: DON'T get shocked by it, it bloody hurts and may also cause you to drop the remainder of the camera on the floor. Ask me how I know!?
Chris...Comment
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Re: Canon Power Shot A540
multimeter reads 2 ohms between positive and negative.
i could not locate anything saying fuse on the motherboard,
i found a slightly big smd with 2 terminals named 33 62rnj with a diode kind of marking, i assumed it is a zener and removed it but no go, but the resistance is still the same b/w positive and negative.
even i am of opinion something more than a fuse or zener is fried as SD card is fried and sd card holder is on a diff board not main motherboardComment
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Re: Canon Power Shot A540
Well I still think it's worth a try - the camera is not working anyways so you can't really lose anything else except for time. Your call on that.
If you decide you want to troubleshoot it further, just keep removing components connected between positive and negative until you eliminate the short. It may be a ceramic cap, and it may be a small voltage regulator or transistor. One easier way to find it, or at least narrow down what it could be is to briefly apply 1v to 2v between positive and negative, preferably with a 1A or more rated power supply. See which component gets hot and remove it, them measure resistance.Comment
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Re: Canon Power Shot A540
thanks momaka for your suggestion, there is logic in what u say, lemme try that.Comment
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