I have Icom IC 707 HF Transceiver which looks like
It was not in use for quite a long time. Now, when I brought the equipment into use again, I am facing some problem, which seems to be stubborn.
When I switch on the rig, and the squelch is turned on, no signals are received; but there is a continous loud tone coming out through speaker.
What I predict is dat the rig is unable to receive the RF signals and some other internal signal is being generated which is heard through speaker.
I want some help on it, if someone could suggest me a way to bring it to operation again..