jagmad wrote:Hi all I have a Hughes (pic below) that is running double time.
That's 2 sec's for every one.
Is there anything I should be checking..
Before I go diving in with the cleaning equipment. (although it does look quite clean?)
Thanks for help in advance. P air...
If it's running at double speed its one of two things. Quartz crystal is faulty (not likely), or the countdown of the 786.432KHz is skipping a divide by 2 register somewhere in the countdown chain. My guess would be that one of the registers are being skipped. The reason I wouldn't suspect the quartz crystal is because when crystals go south, they don't normally oscillate at all, much less oscillate at double their designed frequency. Nothing one can do to fix a problem internal to the Integrated Circuit.
Joe