Stuart provides some excellent basic trouble shooting techniques.
Most problems are simple, often related to "what was being done before this
happened" type situation. Don't start out with the idea that one has to
have a Princeton MBA and a Harvard PhD to deal with the basics of electronic
troubleshooting. It's only a radio and thus it is not interstellar rocket
science.
Should you decide to dig deeper, be sure you have a complete and correct
manual for the equipment.
73
Bob, K4TAX
----- Original Message -----
From: "Stuart Rohre" <rohre@arlut.utexas.edu>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Thursday, March 20, 2008 8:43 PM
Subject: Re: [TenTec] Corsair II Problem
> Everyone has given Woody some good things to check. On almost any rig
> repair, it is a good idea to do things suggested like first check for
> loose connections by unplugging and replugging all boards, connectors,
> jumpers, etc. one at a time. (Power off of course). That would be a
> good time for the DeOxit treatments. Loosening and retightening any
> screws that ground things is included in this first check procedure.
> You may, along the way, fix the problem by any one of these steps.
>
> Inspection of solder joints should begin at the entry of the power lead
> to the rig, the fuse holder, etc. Also, check the high power stages
> first, and ones that might run warm. So finals, driver, power
> regulator ICs, transistors, etc. would be prime, as would filter
> capacitor connections. Use a magnifier of at least 3X and a strong
> light. Once you complete the first inspections and nothing has started
> to make it work, you go to the more detailed inspection in some logical
> order, like follow from the antenna connector on into the path of
> signals. Don't overlook the chassis mounted connectors. Many a cold
> solder joint has been found on a back side of a coax connector or
> similar. If there are any back panel jumper plugs that normal thru
> power or signals, check inside those for bad connections.
>
> Good Luck,
> Stuart Rohre
> K5KVH
>
>
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>
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