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Old 30th December 2008, 10:02 AM   #1
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Question Convert 110v to 230v input ?

Hi all, hopefully someone can help....

I recently picked up a Sony SDP-EP9ES processor cheap on an auction site but it runs at 110v & im in the UK with 230v !

I could get a step down transformer but the seller has cut the plug on the encapsulated power cord

Heres a couple of pics :

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Click the image to open in full size.

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It does say 230v / 110v on the board so hopefully it can be done im just not sure how.....i dont know if i have to move a wire or jumper or something ?

If anyone knows or has any idea please share

Thankyou !
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Old 30th December 2008, 10:23 AM   #2
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I guess, the 110V/230V option relates to a different type of transformer.
Yours seem to have only two wires going to the primary, while the pcb supports a optional three wire connector.
regards
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Old 30th December 2008, 10:34 AM   #3
jitter is offline jitter  Netherlands
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I agree. A transformer with only two wires probably has one primary winding and cannot be rewired to take another voltage.

A more universal transformer would have 2x 115 V primary windings. Then it would just be a matter of connecting them in parallel for 115 V or in series for 230 V.

BTW, wouldn't cutting the power plug be needed anyway to connect the UK plug?
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Old 30th December 2008, 11:14 AM   #4
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Thanks for the input guys - I have a stepdown but not a US plug so i just bodged a connection (dont worry its completely safe)

It works fine which is what i was worried about,not sure why but i tend to associate a cut off plug with broken gear suppose i'll have to find a source for US plugs now though......

I only asked incase i could avoid using the stepdown altogether but its not the end of the world


Thanks again !
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Old 1st January 2009, 07:44 AM   #5
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from your out-of-focus photos i can't really tell if there are extra 2 wires hanging of the primary...??

Boky
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Old 1st January 2009, 10:06 AM   #6
jitter is offline jitter  Netherlands
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Maybe...

But there's another connector with a white and orange wire leaving the picture in the lower right corner... Where's that going? Another (small) transformer perhaps, powering the circuits that have to remain alive when on stand-by? If so, it would need to be converted too...
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Old 1st January 2009, 07:41 PM   #7
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Quote:
Originally posted by jitter
Maybe...

But there's another connector with a white and orange wire leaving the picture in the lower right corner... Where's that going?


To the mains switch.

Quote:
Another (small) transformer perhaps, powering the circuits that have to remain alive when on stand-by? If so, it would need to be converted too...
dont think so.

Boky
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