Only getting voltage there, only millivolts or 0 volts everywhere else, no voltage on cold side no voltage on any coil or cap except filter cap no voltage on UL1, UL2 or eeprom, maybe problem with transformer?:
It is on the primary side. There will be a small driver ic, likely a smd 6 pin, this ic drives a power mosfet that switches the primary of the main transformer to produce the secondary voltages.
Thanks gentlemen, any way to verify UB101 is not working, like testing QB101 or DB106? QB101 has 170 v on middle pin, 0 v on the other two, DB106 tests good in diode mode, has 170 v on each end.
Having a little revisit with this one board pos, think it's bad backlight/s, current situation, tv comes on fine, goes blank screen after about a minute or so, sound still there, passes flashlight test, voltage on big caps is about 164 both when working with picture and when it goes dark, I don't know much about these one board tvs, do you think that it is only suppose to have 164 and not go any higher or is something else wrong other than backlights?
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