Help:ampeg svt 2 pro 100v>>240v

[jujumusic]

I purchased one AMPEG SVT II PRO amp head in japan.This AMP voltage is 100V. China's voltage is 220V.

I want to change the voltage to 240V.

I only found original SVT II jumper method,But they are not the same.

Who can help me.

Many thanks.