Recently we had some more discussions about the Edirol recorders, I mentioned having problems, and Monica pointed out it was likely the power adapter being broken.
After a discussion with a hardware-savvy colleague today, I understand a bit more about that and though it may be good to share the knowledge.
The Edirol power adapter is a so-called "switching adapter", meaning it does not contain a transformer (as conventional adapters do), but a high-frequency circuit which breaks up the mains AC into a 3-volt DC. Now, it seems to be a known fact - though I had no idea - that this type of adapter cannot stand being plugged in the mains while the consuming device is off, or even unconnected. That will kill them sooner or later, and now I understand why mine is broken. I did use to leave it plugged in for days, while the Edirol was lying somewhere else.
So, I you have an Edirol, or other device with a switching adapter, take heed of this. Maybe it's
in the manual (must RTFM.....) but still I think there should be a dirty great big warning sticker on the adapter. Nowhere a word, though
Is probably how the manufacturers earn their money.
Having said that, I must admit it does
say "switching adapter" on the label.