1 Disconnect the power and antenna.
2. Remove the top and bottom covers from the radio.
3. Locate the Control board on the bottom of the TS-680S
4. Remove diode D31 on the Control board.
5. Reassemble the radio.
6. RESET the CPU.
1. Put radio in VFO mode and turn power off.
2. Press and hold [VFO/M] & [LSB/USB] and turn power on.
The display will say " -HELLO-" The CW announcement will please you.