Is there a simple method to convert an 110V AV receiver to 220V ? I think the factory uses the same power transformer for both the european and US market ?

 

One way is to use stepdown transformer.

hgmjr

 

that's not a good solution, because the transformer is heavy and the shipping from US to Europe is expensive, it's also big and impractical.
Isn't it possible to modify the AV receiver to use it's own transformer with 220V ?

 

The only thing we currently know about your situation is that you have an AV receiver designed for 110V, and you want to run it on 220V.

That isn't a whole lot to go on.

Is it too much to ask to supply a manufacturer's name and model number?

 

Denon AVR-2809 or ONKYO TX-SR705

 

I didn't find their schematic but I bet the transformer has two primary windings. In series they are for 220V and in parallel they are for 110V.

 

I have a european Denon AVR-1907 which is designed to work with 220V, on the transformer it's written Denon Power Transformer 5133333, can you find this ?
I'm curious if this is the same transformer as in the 110V version.

 

Hi
I have a denon avr-788 which i think is the us version of avr-1908. On the power transformer it says 5133333, so i think it´s the same.

 

that's not a good solution, because the transformer is heavy and the shipping from US to Europe is expensive, it's also big and impractical.
Isn't it possible to modify the AV receiver to use it's own transformer with 220V ?

Why would a transformer need to be shipped from the US to Europe rather than bought locally?

 

i asked denon about using foreign voltage, and here´s the answers:

Customer (me) 08/27/2008 04:55 PM
Hi
I have a Denon AVR-788 receiver. Is it possible to use this with 230 V 50 Hz ?

Response (Ean Levy) 08/27/2008 05:12 PM
Yes, but you will need to use a step down transformer.


Customer (Svein Astad) 08/28/2008 01:58 PM
Is it possible to change the internal transformer?

Response (Ean Levy) 08/28/2008 02:03 PM
No.

That´s it.

 

They won't tell you that you can mess with the internal electronics, even if the US and European model shares the same power transformer.

 

Are you able to remove the cover & upload a photo of the transformer?

 

sure, I have attached 3 photos

 

Well, just a wild guess suggests that the yellow and black are the primary windings. However, you have the two reds and a yellow coming from the other side (nearest the corner). Those might be high current, high voltage secondaries for the amp output. However, you'll have to do some circuit tracing to figure out what they really are. A wrong guess here will mean repair costs that will make the 220v-120v step-down transformer dirt cheap by comparison.

 

but I don't know if the step down tranformer makes the US 60Hz to 50Hz conversion

 

Actually, 60Hz vs 50Hz shouldn't really matter that much, unless the 60Hz portion was being used for a clock display.

 

From the proximity to the fuse and what appears to be line filters, the yellow/black pair is probably the primary. That means a single primary, so it won't convert to 220 volts.

If you have a meter, pull the yellow/black connector, attach leads to the connector pins on the board and turn on power. If you see 120 VAC, then that is the power input to the transformer.

 

please note that this is the 220V version of AV receiver

 

OK, so do you have the 110V version? Can you post photos of the guts of it?

 

No, I don't have the 110V version, I am planing to buy one, and that's why I want to know if I can convert it to 220V. In US the same model is 50-60% cheaper than here in Europe.