Accuphase voltage conversion


I have a Japanese market Accuphase E-370 for which I plan to use an external voltage converter for 120v.    Looking inside this Integrated, it no longer appears to have the jumpers which allowed easy voltage conversion.    Are all the new Accuphase products similar?     Does anyone know how to change the voltage internally?   Thanks 
pip555
George, 
What is difference between qualified tech and unqualified? Is there licensing for working with electronics? I doubt it. You get lisence of electrician, but for electronics repair you don't  need even that. As to safety, there's plenty of information on how not to get zapped.

All I require is a photo, or a schematic of someone who has a 120v version.


What I’m saying if this question needed to be asked, and one doesn’t know how to do it oneself using a DMM. Then it would be much safer to get a electronics technician to do it.

As if there are multiple primary wires for different mains voltage operation which it sounds like there is, depending on the export country they can even have different colours. And there can be half a dozen different ways to wire it up.

The safest way is to measure using DMM all the static impedance of each of the
primary windings, so one can get the series or parallel connection or what wires not to use for the mains input voltage required


Is there licensing for working with electronics?

Of course there is, especially on the mains side if one need to have trust in a persons ability.

You get licence of electrician

Electricians I know, would not have much of an idea how to do this, they might have a go but confidence would be lacking. An electronic technician however would know how.

Just look at the amount of wires here on the transformer on the primary side of things, this transformer may be able to serve 100v, 110-120 or 230-240v mains, and there’s what looks to be a resistor involved, which could also be a thermistor. (seven possible connections)

http://www.hifido.co.jp/photo/07/108/10895/e.jpg


Cheers George

hmmm... 
I started changing tubes in my mono console system when I was 8. Than started repairing TV not too long after.
Never bothered getting lisence of electronic tech and still prefer to repair my own electronics as a matter of fact without help of lisenced tech.
License is probably something to do more with money not with actual skill or trust. 
Number of possible connection dictates to use logic to identify the right terminals more than knowledge of electronics or electro-magnetics. It means that there are color codes to ID either by measurements or by asking crowd or by asking manufacturer directly in Japan who will most-probably share this information. 
As DIY tech I've been able to receive or download lots of circuit diagrams that carry bunch of usefull information about voltage across certain terminals and wire colors. It might be harder to get diagrams for later models, but if available for earlier models the color code can very possibly match the newer model.