I have recently acquired a Yaesu FT-60R from a friend, that was dropped, and no long functions properly.
The radio transmits perfectly, absolutely no issues there.
All the built in functions and buttons work as well, changing frequencies, menus, memories, etc.
The issue seems to be on the receiving side. When tuned to a random empty frequency, the speaker emits nothing but a rather rough crackling static. Not white noise static, electrical short sounding static.
When tuned to a frequency currently in use, the speaker goes perfectly silent. No sound whatsoever, though the S-meter displays and works properly.
At first I assume the issue may be with the audio output IC, given the symptoms, however, it seems as if the Squelch knob, and the monitor button, neither function, and the volume knob does, so I suspect the problem may be elsewhere. I've had the radio apart several times, and have gone over it with a magnifying glass to check for any obvious issues, none of which I've found.
The only equipment I really have here to use for testing is a decent multimeter and a half-reliable (One channel is out) 50MHz scope. I do however have the service manual for this radio.
In any case, I'm looking for advice of where to go from here.
Much Appreciated.
The radio transmits perfectly, absolutely no issues there.
All the built in functions and buttons work as well, changing frequencies, menus, memories, etc.
The issue seems to be on the receiving side. When tuned to a random empty frequency, the speaker emits nothing but a rather rough crackling static. Not white noise static, electrical short sounding static.
When tuned to a frequency currently in use, the speaker goes perfectly silent. No sound whatsoever, though the S-meter displays and works properly.
At first I assume the issue may be with the audio output IC, given the symptoms, however, it seems as if the Squelch knob, and the monitor button, neither function, and the volume knob does, so I suspect the problem may be elsewhere. I've had the radio apart several times, and have gone over it with a magnifying glass to check for any obvious issues, none of which I've found.
The only equipment I really have here to use for testing is a decent multimeter and a half-reliable (One channel is out) 50MHz scope. I do however have the service manual for this radio.
In any case, I'm looking for advice of where to go from here.
Much Appreciated.
