DJ-S40 Japanese Version Modificcation is different from other versions.
- Remove battery pack
- Remove four screws
- Open the inside and look at main circuit board
- Remove two tip resistors as follows
R210 ( look for printed letters 'R210' on right bottom of board )
R202 ( above the microphone, little bit right. this tip resistor is crosswise while other resistors above microphone are all lengthwise )
- Assemble the radio as original
- Reset the radio by turning it on while pressing FUNC and V/M at the same time.
You can transmit and receive from 400MHz to 469.99MHz