[Tech-Assist] Harris SX5A logic problem

[Alan Alsobrook]

radioranger wrote:
> After replacing 4 FETs on the PDM boards and 2 RF FETS it still isn't
> working--- the odd thing is that the PA current meter is reading downscale
> whenever you try to turn the rig on, and that meter stays pinned downscale
> until I turn off the control power breaker.  

Haven't see this before but..
First check all your power supplies.
Next pick one of weird readings (I would go after the negative PA 
current) and troubleshoot it all the way out.

Since you know you have positive PA current, when you find out why that 
is reading negative, it will most likely solve all the troubles.

My first thought is a control or metering power supply is down or 
shorted. Most likely not due to the high water, but just one of those 
things that just happens. Keep in mind electrolytic caps sometimes work 
fine until you give them a day or two off then they don't come back.

-- 
Alan Alsobrook CSRE AMD CBNT
St. Augustine Fl. 32086 904-829-8885
aalso at Bellsouth.net