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how to adjust so that electric clock that made for 60Hz electricity can be used in 50Hz electricity?
i have radio clock that we brought from the US....
everything works normal except for one.....
the time is running at approximately 83.33% normal time.
yes, exactly. the main source i think is because the US uses 60Hz and here, where i am now uses 50Hz.
thanks
are there any parts inside that i can switch or replace?
what is the name of the part and can someone give me the link on how this part may look like?
the brand is sony model# ICF C211.
i opened it and there was two part that were adjustable.
but i think they are for FM and AM radio.
so,...please help me. i really love it and dont want to throw thing that is still fixable. the earth is already polluted.
sullivan.
thanks alot.
will try your remedy.
the voltage is taken care.
i replaced the stepdown inside.
it was fun project
"Adjustable"? Absolutely do not touch anything that's adjustable. You'll mess up the radio.
If you are absolutely certain you can handle soldering to something that runs on 240 volts (though the part I'm talking about doesn't have anything like 240 on it)...
If you look at the printed circuit board, there are two largish ICs. The one nearer the edge (and nearer the connections to the LED) is IC2.
Orient the board with the components on top, in a "landscape" orientation, and with IC2 at the upper right.
Now if you look at the side of IC2 that's away from the long edge of the board, and if you then look "below" IC2, nearer to the end of IC2 that has the notch, you should see a couple of short jumper positions labeled JW11 and JW12. (Though they might not be labeled.) With this board orientation they run "vertically" on the board, directly away from IC2.
If I'm reading this right, JW12 should be present, and JW11 not present in your clock. And if you solder a wire into the JW11 position, your clock should run on 50 Hz.
btw, the end of JW11 that's closer to IC2 is connected to IC2's pin 26.
fyi, JW12 selects 12 or 24 hour mode, though I can't tell which way is which. If you would like to change the clock from whichever one of these modes it's in to the other mode, remove or clip JW12 if it's present, or install it if it isn't.
Do not of course do any of this unless you are competent soldering in fairly close spaces and working with printed circuit boards from the DIP IC era.
How are you handling the voltage change, by the way?
P.s. - added: If you'll email me here I'll get the sevice manual (PDF) to you.