[Amps] Kenwood TL-922A Problem

[TNeill1648 at aol.com]

We recently had a very severe thunder storm with tremendous lightning strikes 
occurring a few miles from my QTH.  I did not suffer a direct hit but the sky 
was full of electricity.  Unfortunately, this amp is used at a station I have 
in one of my horse barns and I was unable to get to it to disconnect the AC 
and the antenna.  (The antenna still works fine).
 
After the storm passed my TL-922A amplifier ceased to work.  Here is what I 
have observed with the amp after the storm:
 
-No blown fuses.
-HV is normal.
-Idle plate current is normal.
-No burned smell anywhere.
-All switches and controls seem to be normal.
-Change over relay appears to function normal.
 
When I close the changeover relay and apply drive nothing happens.  The 
exciter is working properly.
 
I have not removed any panels to investigate the trouble but my problem 
appears to be in the input circuit since everything else seems to be OK.  This 
weekend I am going to remove the panels and begin troubleshooting the problem.  I 
just wondered if anyone familiar with this amplifier might have a suggestion 
as to where to start or if anyone else has had this problem.  In 20 years of 
use, this is the first problem I have ever had with the TL-922A.
 
Thanks you for any suggestions or recommendations.
 
HNY in 08.
 
Tom Neill
K4XG



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