"MerLin" wrote in message
oups.com...
Hello all,

I just got a Trio TS-780, however there is no RF power on Transmit. At
first i thought that PA stage was damaged however i also noticed that
the ON AIR Led and Antenna Switch are not energised in Transmit Mode.
Receiver is working perfrectly. Can anyone supply me with detailed
schematics for this Transciever and whether anyone has seen this fault
on similar transceivers?

Thanks

Mario


Mario -

Always have a 50 ohm dummy load attached for testing.

Check the T/R (Transmit/Receive) relay in the RF section of the radio.
Is it working?

Kenwood/Trio TS-870 Repair Notes (check for shorted capacitor)
http://www.mods.dk/view.php?ArticleId=3094

Kenwood/Trio TS-780 Owner and Service manuals are he
http://www.mods.dk/view.php?ListManuals=kenwood

Greg
w9gb