Convert 110v to 230v input ?

istari knight · 30th December 2008, 10:02 AM

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 :

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 !

Juergen Knoop · 30th December 2008, 10:23 AM

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

jitter · 30th December 2008, 10:34 AM

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?

istari knight · 30th December 2008, 11:14 AM

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 !

Extreme_Boky · 1st January 2009, 07:44 AM

from your out-of-focus photos i can't really tell if there are extra 2 wires hanging of the primary...??

Boky

jitter · 1st January 2009, 10:06 AM

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...

Extreme_Boky · 1st January 2009, 07:41 PM

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

30th December 2008, 10:02 AM	#1
istari knight diyAudio Member Join Date: Sep 2005 Location: Cornwall, UK	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 : 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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30th December 2008, 10:23 AM	#2
Juergen Knoop diyAudio Member Join Date: Jan 2007 Blog Entries: 3	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

30th December 2008, 10:34 AM	#3
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	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?

30th December 2008, 11:14 AM	#4
istari knight diyAudio Member Join Date: Sep 2005 Location: Cornwall, UK	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 !

1st January 2009, 07:44 AM	#5
Extreme_Boky diyAudio Member Join Date: Dec 2003 Location: Sydney	from your out-of-focus photos i can't really tell if there are extra 2 wires hanging of the primary...?? Boky

1st January 2009, 10:06 AM	#6
jitter diyAudio Member Join Date: Aug 2004 Location: Eindhoven, The Netherlands	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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