Wrong UK Voltage - USA Voltage System

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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.

Answered! View the answer I have this problem too

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You'll need to contact Altec Lansing in the UK as their site in the US is down to get support from them. It maybe a simple fuse or something more here.

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Thanks................ I have tried to contact them without any luck. I will continue to chase them if they can help. I hope someone will come up with a solution anyway.

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Do you have their contact details in the UK or Europe? I may be using a wrong address

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Sorry I have no info on how to contact them in the UK.

Here's what Wikipedia has: Altec Lansing. The web link doesn't work for me here in the states.

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Look for a fuse. They come in shapes and sizes, but look for a little capsule with silver caps at each end and clear glass in the middle.

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3 Answers

Chosen Solution

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

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take the back of the circuit board also.

just like mine, no power, when check on the back of the power board...

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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.

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If possible list the components value, so we can compare, perhaps some modification ....

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Thanks, I will check it today.

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The pictures are exactly the same

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Partial List FYI

S/N

Component P/N

Component Location

Usage

Remarks

Info

1

08N80C3

G2

Infineon 08N80C3

2

Capacitor 681 2KV

C3

Near to JMP2

3

V109Y 817A

U2

Fairchild OPTOCOUPLERS

4

4R0

RT1

5

1110 ??? 1R0 ???

SMD Resistor

Burnt

6

Fairchild Y1010DN

D11, D12

7

1200uF 25V

C16, C17, C18, C19

4 Pcs

8

4.7uF 50V

C11

9

220uF 25V

C20, C21

10

100uF 50V

C14

11

First Row: 03 510

Second Row: PA TM

U1

8 Pin

Unknown

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Most Helpful Answer

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.

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Thanks I will do that

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How can i add photos?

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Hi @thejames,

Click on the link in my comment above about "Adding images to an existing question". It shows how to add photos to your question from where they are stored in a pc.

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Thanks Jayeff

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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

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Thanks Shrubbery....................US is 120V and UK is 240V but I think I have done the damage before checking the voltage.

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i understood what you meant, also know about the difference in voltage, but what i meant is, perhaps your power supply is ok with the voltage difference and problem is somewhere else.

for example power supply of the notebook i am writing now from, has clearly indicated

INPUT : 100-240 V, 50-60 Hz,1 A

which means i can plug it on both continents in the outlet and nothing will go wrong.

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the problem might be where you think it is, rule this out first, it's easy

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120v ~/ 60hz 1.6a

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Maybe the voltage is fine because the old one which I have used for over 10 years had AC 230V 50Hz/500mA written on it but the one we are having problem with has 120v ~/ 60hz 1.6A

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Terry will be eternally grateful.
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