[TenTec] Dead TT 280 PS

[d.e.warnick at comcast.net]

I'd bet on the PS switch being open (is it turned on?) 



If you have no voltage on the 2 white wires with the PS plugged in and the switch on, look at the primary circuit. 



One white wire is connected to the AC line through the fuse. Check continuity there 

The other white witre connects through the PS Switch and the primaries of the transformer. Check continuity there. 



Check the PS switch for continuity 

Check the fuse & fuse holder combination for continuity 

Check the transformer primaries for continuity and correct 120v/240v connection 

Check the power cord for continuity 



ALL CONTINUITY CHECKS WITH THE PS UNPLUGGED, OF COURSE 



73 

Dave 

WA3F 

----- Original Message ----- 
From: "John Graves" <jh.graves at verizon.net> 
To: "Discussion of Ten-Tec Equipment" <tentec at contesting.com> 
Sent: Wednesday, March 9, 2011 9:55:08 AM 
Subject: [TenTec] Dead TT 280 PS 

I loaned out my Omni-D and 280 supply but it appears that the PS is not 
working. The meter light does not come on. I checked the voltage on the 
2 white center wires on the connector and found no voltage.  The 
external fuse checks good.  Any suggestions on where to go next?  I do 
have a copy of the manual with the 280 schematic so that helps. 
-- 
John Graves 
WA1JG 
jh.graves at verizon.net 
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