110v accidentally plug in to 220v and the ic cut into pieces, we replace it. But the diode and resistor get damaged. What is the problem, we dont knoe thw value of the resistor because it get burned. and also the ic number????

Take unit apart an look at power supply. It could be just the solid state fuse popped. Power supplys are not hared to repair, the diodes are about .50 a piece, the caps about $1 a piece or so. Hopefully ot did not reach the speaker, an i doubt it did.

The pro cut 25 will run on ether 110v or 220v without changing anything. I made a 220v to 110v adapter. It works well and if I want to run it on 110v it will still plug right in.

plugging a 110v device into a 220v outlet is not likely, as the plugs are a different configuration. In the event that you somehow managed to do that, your device is probably fried, as that would be to much voltage. Hate to say it; but you are probably gonna need a new one

first check the supply of the TV, check if there is 110V or 220V on your voltmeter if there is a supply, check for busted fuse that is open reading on the multimeter on a diode test. replace the fuse with the right specifications to avoid further damage, then if it is not turning on after the fuse is replace check the power supply of the TV is is located on where the main plug of the TV is mounted. maybe there is a shorted transistor of diode.

Hi ,
If it says it needs a AC 110V connection , you will fry at least the sub . Don't do it ! Connect the device to an AC 220 / 110 V transformer you can find on the net or in all specialized retail shops .
Best regards

Hello nik286, hi, check first the label at the back of the TV, look for a voltage input something like a 90V-240V, if you see this, its an autovolt system, this type of power supply input is standard nowadays. Assuming your asking what would be damage, this could be anything from the fuse, thermal resistor, rectifier diodes, and the regulator IC of the power supply board.

Most likely what got burnt is the bridge rectifier in the power supply section of the electronic circuit. This usually takes the shape of either a single 4-legged IC, or a group of 4 rectifying diodes connected in a bridge configuration. If you disassemble the unit to which the power cord is attached & trace the circuit starting from the terminals of the power chord, you can easily identify it. You will need to replace the 4-legged IC or the 4 rectifying diodes.
You will also need to replace the fuse, since it is usually likely that it gets burnt if the unit is attached to 220V instead of 110V.

it would not be worth fixing. all electronics would be fried

The Fuse for these model is 110V - 250V, so definitely the machine will still light up for a moment then black out. So if you accidentally plugged it to 220V (if it is 110V) you have to change the whole PCB. Electric current are distributed by PCB which only handles 110V.

I suggest when you change the PCB try to change also the Fuse to 110V only so that next time if by accident it was plugged to 220V you just have to change the Fuse not the PCB.

I

Hi,
you,ll have blown the PSU.
there maybe an internal fuse, located in the PSU. but if smoke was bellowing out, i,d say it went straight past the fuse.
New PSUs the best bet.
Mike @ Compurepair.