1. Remove battery and antenna.
2. Remove Screws and open radio
3. Remove D506 (this part is already removed on US version)
4. Attach Diode as shown (Use 1N914 or equivalent Diode)
Make sure Diode leads will not short anything. Cover them in tape.
5. Reassemble the radio.
6. Reset Radio. (Turn radio on, Hold [LIGHT] & [FUNCTION], turn radio off and back on)