回答“turns on but wont key up.”1) try substituting a different mic or two. The second problem a radio runs into is a broken mic wire down by the plug. The first is an antenna that is not tuned. 2) what is the voltage that is feeding the radio. It should be between 12 and 14 V. If the power is too low for some reason it won’t key-up. 3) ground will be coming from the power wire. Disconnect the coax from the radio to make sure that is the case. Fix the ground wire if necessary. The complaint states that the meter and Tx light are not working. They should work if there was no antenna connected to the radio.
回答“Why does it quit sending and receiving”This problem can occur when the antenna wire is corroded away from the brass fitting that is screwed into the antenna mount nut. With a Firestik type antenna that has the wire covered by the plastic coating you must expose the wire by cutting away the plastic. Check for a broken wire. Emergency repair; pull wire down, fasten down with small hose clamp onto brass fitting. Check for a bad microphone. Substitute a good working Mic to see if the problem goes away. Wires break close to the plug that goes into the radio. Working over a clean white towel remove the two screws from the clamp, remove the one screw from the body, separate the chrome body from the end of the plug by giving it a small twist and pulling. On a standard four pin microphone you will have four wires that should all be connected to the plug. If one wire is broken the radio will Not work properly. Map out what color wires go where. Cut back to good wire, strip the plastic 1/4 inch, (tin, (solder) the ends of the wire) resolder the...
回答“Why do fuses keep blowing on cb”Usually cause the power surge protect diode has been destroyed. That's it's job. Sometimes the reverse power problem will travel beyond the diode and burn up a trace on the solder side of the board. Solder a bit of wire to bridge the burnt spot. Rosin core solder. Replace the diode using a suitable size / make of diode. Make a drawing of the location of the silver band on the diode. Called the cathode side. Usually on the board drawn as line, l next to a triangle -l< Scrap electronics should have some you can use. Diode is close to where the power is entering the radio by a largish capicator.