The FT-990 is an amateur radio reciver manufactured by the Japan-based company, Yaesu Musen, between the years 1991 to 1999. The radio is favored by HAM radio amateurs because of user-friendly and ergonomic design. The receiver packs 100 watts of transmitter power and tunes to all frequencies between 100 kHz and 30 MHz. Frequencies are easily changed by the use of a central tuning dial. If the tuner doesn't respond, then repair with some tools around the house.
Instructions
1. Unplug the transceiver from the wall electrical socket and set on a bench or table.
2. Use a screwdriver to remove the case screws. There are approximately 10 case screws located on the back and on both sides of the transceiver.
3. Set the screws aside and remove the top cover of the transceiver.
4. Examine the back of the tuning knob inside the transceiver. There should be a tuning band, which is a small rubber belt that runs from the back of the tuning knob controller to a small, plastic sprocket to the immediate left. If the tuning knob will not respond, the tuning band has either become worn, popped or came off the track.
5. Use a pair of needle-nose pliers to set the tuning band back on the track. If the band has popped, replace with a new one and install with needle-nose pliers.
6. Re-assemble the casing, plug the transceiver in and power up to test the tuning controller.
Tags: tuning band, back tuning, back tuning knob, case screws, needle-nose pliers, tuning knob
