Re: Yaesu FT-7 No Transmit
VR2105 - > page 19 of the manual, left hand picture, second item from the top.
It's in the PA module, again with a screwdriver access hole on the top.
Beginning to sound like the problem is somewhere between the input to the PA module and the antenna socket.
So that leaves us with:
the PA module
band switch - as in any rig that uses a band switch such as this, dirty/tarnished contacts are common.
LPF (low pass filter) module - as mentioned, burnt out coils is most common on 'got at' rigs. Note that the LPF module is only on the Tx side, not used on Rx.
ALC module - only thing I can think of that can go faulty in there is the diodes and T1501, although I can't say as I have heard of that happening.
Antenna socket - what is the receive side of things like? If that is OK, it would eliminate the antenna socket, but a visual check for a broken wire would be an idea next time you're in there - has been known to happen and will throttle the transmit side right back.
Re the VR on the back panel, did you by any chance think to do a meter check on it to make sure it wasn't faulty.
|