Question about Sony CFD-646 Boombox

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My bombox not turn on

Hi, my sony boombox doesnt turn on look like the power doesnt get in

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If you want to sell your boombox let me know. my email is lizzymariascott@att.net

Posted on Jun 13, 2009

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Posted on Jan 02, 2017

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Sony cfd-s01 boombox radio


Hi Bart,
You will find there is a specification plate on the rear of the unit.
It should have a rating on it showing the wattage of the unit. This is usually the amount needed to operate all the functions of the boombox.
The wattage is your input voltage multiplied by the current draw in amps. So the amperage is the rated wattage of the unit divided by the input voltage.
Usually all power goes through the transformer, so I would use this input amperage as a guide, and assuming there is no power loss, use the same calculation for the output - you know it is 9 volts, so the wattage going to the unit is the same as the input wattage, so you can calculate the amperage from this.
Transformers usually work on AC input/output, so there will also be a rectifier to convert the AC to DC for your boombox.
I would add 10 - 20% above your calculation to make sure you have sufficient power. Also I suggest that you install a fuse between your transformer and the boombox for safety.

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If "PROTECT" appears on the display: Immediately unplug the power cord, and check if anything blocking the ventilation holes on the back of the system after "PROTECT" disappears. After you have checked the ventilation holes and found to be all right, reconnect the power cord, and turn on the system. If the issue persists, contact your nearest Sony dealer.


The above is from the manual at http://www.docs.sony.com/release/MHCEC909IP.pdf

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There is a fuse on the power supply rectifier board. Check it.

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1 Answer

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HelloThe audio output section of your bombox has some short circuit inside it. it may be an IC short or capacitor short. The main rason for HUM is this. Never switch ON the set, until this fault has been rectified. It may cause the voice coil of the loaudspeakers will also get damaged. OK.

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Hi,
Have you try on ebay or amazon... Otherwise, go seek it on Sony dealer.
Regards

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Aiwa has discontinued the original cord for this unit. However, Aiwa is Sony's entry level line. Most Sony cords used the style that was in the shape of an oval without any notches. If this is the case you can purchase the generic version through any national public distributor such as MCM.

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Hi,
I'm Sony tech and can help you to sort out problem in your CFD-G505
Do you get any power sign/ power indicator in unit when plugged in/ with batteries?
Let me know to look into related schematics, you need to take apart unit for further checking.
Thanks.

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Hi

you an buy the item in electrical or electronics store

Thanks!

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Purchase online at Sony.com, parts and accessories.

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