The scanner was working nicely with 220 V (50 Hz) to 110 V Down-Converter since last few years.
But accidentally for a second or so the toggle switch of converter was kept on normal i.e. bypassing it and the PSU got 220 V AC supply. The scanner stopped working. All the internal incomming voltages are norma. No burnt IC or SMD Component. But still scanner is not working.
No indication, no helogen lamp and no trace of hum from stapper motor.
Please Help me.
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There are a few items that are important when trying to substitute an adapter. Obviously the connector must fit. After that, it is not so much the input voltage/current that is important, but rather the output/voltage/current as well as polarity. The output voltage of the adapter must match the device's requirements. The output current of the adapter must be at least as much as the device requires. Lastly, and most important, the polarity of the connector MUST MATCH, otherwise smoke and flames will occur. On round connectors, most devices have the positive terminal in the center (but mot all).
Not sure why it burnt going from 240 down to 110volts. The unit should not have worked. However, if it is a 110 volt machine and you plugged it into 240 volts... different story... At best you have blown the power supply board or board fuse.. At worst, the machine will be fried inside.
Well, without a real test I would say ït could be fried!
If you smell
1. Burned wire smell
2. Burn eletronic smell
Then you betcha its not even going to be worth a fix simply because the supply is gone so is everything else. There are no aprent fixable parts in these. I would have suggested you brought a converter they do sale them. But it may be too late, but who know try to find someone with a converter if it does not turn on its gone simple as that.
Do not shoot the messenger please do leave postive feedback for answering your free question.