[Kenwood] TS-520 No output!

[manualman at juno.com]

Did you do the dip and load as part of the tune up procedure? Did it load
up to roughly 200 to 225 ma? When you say, no output, what are you
looking at to indicate  "no output"? If you want a visual indicator of RF
output, connect a 100 watt light bulb across the antenna connector and
use the CW mode. Can you hear the rig in another receiver when you
transmit? In the SSB mode, if you don't say anything in the microphone,
you will get no output?
Does the rig work fine in the receive mode? Can you hear stuff?  Does the
came condition appear on all bands?

Pete, wa2cwa
www.manualman.com

On Sun, 4 Apr 2021 02:36:29 +0000 (UTC) Tom WA9WSJ via Kenwood
<kenwood at mailman.qth.net> writes:
> Hello Gents,
> I'm working with a TS-520, (not the S version), and get zero output, 
> in all modes. 
> Going through the manual, step by step, to tune it up into a dummy 
> load I get all the proper meter indications as described. It will 
> perform just as the book says but no output!
> I've replaced the finals and looked for any burned parts or areas 
> and nothing. It all looks good. I've followed the rf path from the 
> coax connector all the way to the load cap and all is good. The path 
> from the HV source is also good all the way to the plates.
> I've deoxed the wafer switches, and the SG switch is in the proper 
> position and works, I ohmed it. 
> I've checked and even cleaned the T/R relay contacts but no go. I've 
> checked the value of fixed caps in the circuit but they are okay. 
> The only off value part is the 1 watt 10k ohm resistor feeding the 
> 1n60 diode, it measures around 18k. But this may be due to other 
> components skewing the reading.
> I did find a great thread on QRZed but it was for a "S" version and 
> what hints might apply, did not help.
> Anyone have any ideas? I'm stuck!
> Thanks!!!
> Tom