Yamaha Stagepass 500

[Geobee]

Hi all, new here, but may well be able to help others, as I have over 35 years tech experience in the music industry. A friend has just purchased the above system from the US, and wants to use it in Australia, on 240vac that being our supply. I believe the mixer uses a switchmode power supply, and I am wondering if it would be auto ac input adjusting, from the 110v to accept the 240. He doesn't want to drag around a heavy step down tranny, as it defeats the purpose of a smaller, lighter system than his current one. Hope someone can help, as I cant seem to get a straight answer down here. Kind regards. Geobee

[Jazz P Bass]

I don't know if it is switchable.
This is direct from the manual.

"Power supply/Power cord
• Only use the voltage specified as correct for the device. The required
voltage is printed on the name plate of the device.
• Use only the included power cord."

[Geobee]

Hi there, thank you for that. I will have a look at the service manual, may give me a further pointer. Regards. Geobee

[Enzo]

Hi Geo, welcome to the forum

So look inside. Either it has a big power transformer or it has a switcher. either one of those might be convertible. The absence of a switch on the outside doesn't mean there is not a jumper to remove to go from 120v to 240v. And if it winds up a linear, well, either there are enough wires to be a dual primary or not.


OK, I looked it up. It is indeed a switcher. Like most SMPS there are jumpers for 120 and 240 volt operation. Find JP801,802,803. You won't have all of them. I think you will find 801 and 803 in place and 802 missing. Remove 801,803, and install 802. In other words remove the ones that are ther, and install the ones that are not. Also, the main filter caps, C806-809. In the 120v they are 560uf/200v, and for 240 they are 390uf/200v.

I don't see any note about changing the primary fuse though.