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Hello Guys, Please try help me if you can or tell me what to do…………. I got this speakers (Altec Lansing MX6021 2.1 ) as a gift from US but when I plugged it in the UK the system is not working. I later realized the US Voltage is lower than UK. So I must blown something inside the speakers. If I know what to do or replace inside I can get it done by myself. Please let me know if there is anything I can do. Multiple emails has sent to their representative in Europe without getting any reply from them.

Hi Terry, mine is a 230V model, perhaps you can check the pictures for comparison.

take the back of the circuit board also. just like mine, no power, when check on the back of the power board…

unfortunately for mine, the resistors were blown due to a surge. still figuring what value were those also…. the fuse and Infineon 08N80C3 were dead. do you have a multimeter? if you cannot get a replacement board….. you need a step down transformer to use.

Hi, Plugging 120V equipment into 240V supply will certainly cause damage. If you are prepared to void your warranty (most probably is anyway) open the speaker where the power enters and take close up pictures of the circuit boards and post back here. Someone may spot what the problem is and hopefully will be able to help. Also if you can once it is open, check if there is a part number printed on the circuit board (Usually the biggest print) that way it can be searched for online as a replacement part. Not necessarily to get it, but to view it in case one of the components on your board is “burnt beyond recognition” and needs to be identified. Adding images to an existing question Update (01/10/2017) Hi @thejames Unfortunately the photos do not show anything obviously wrong. According to the data sheet for the product https://www.manualslib.com/manual/365946… the power supply is contained in the sub woofer and from what little I did find out online the unit has an SMPS (Switched Mode Power Supply). These can be a bit complicated to work out without a schematic or the correct testing tools on hand, especially if an IC (integrated circuit chip) has blown but there is no physical evidence of it having done so). It might be advisable at this stage to get some quotes from a couple of reputable, professional electronics repair service companies in your area on how much it would cost to repair a suspected blown power supply caused by the application of the incorrect power supply input voltage. Perhaps check online if Altec Lansing (or Plantronics) has any authorized repair services in your location as they may have access to the service manual or schematics. I suggest getting a few quotes as this way if they are close to each other in their estimates you will have a better idea of the true cost of the repair.

check the power supply box, it should be written the accepted voltage Update (01/05/2017) it’s usually written as input, perhaps nothing is blown and problem is somewhere else

Change the capacitor 220uf 200V to 220uf 400V and you can use it.