Re: NBTV Television Analyst
Posted: Mon Apr 27, 2020 7:57 pm
Steve trying to get my head around it but while checking as you were saying check the resistor chain i checked resistance between the top of the 5.1v zener to the other duplicate not in use and there was a very high resistance well over a meg and a half or so i should written it down but i can't do much with the kids running around this time of night thinking wise ! i can only think its via its resistor chain then via ground back up via the other circuits resistor chain to its zener theres no where else its connected even the ztx558 trany has not been replaced yet nothing hooked up it .
I was not expecting resistance between these two zeners ... but via ground connection makes sense ...so i don't think this is the problem i thought i would mention what i found ..
I have not got time yet to check the board again tonight for dry joints but that resistor chain seems fine via connections ..
It is a nagging problem to want to know why and checking is good ,never hurts to double triple check ..i have looked at the boards circuit here so many time i think i could build if from memory now .
I was not expecting resistance between these two zeners ... but via ground connection makes sense ...so i don't think this is the problem i thought i would mention what i found ..
I have not got time yet to check the board again tonight for dry joints but that resistor chain seems fine via connections ..
It is a nagging problem to want to know why and checking is good ,never hurts to double triple check ..i have looked at the boards circuit here so many time i think i could build if from memory now .