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Yes, i figured so far after staring at it for a while. It was a good learning project and will definitely not make the same mistakes, thats for sure. Thank you
today I plugged this board in to start measuring some grids and U0500 started smoking =(
the smaller glass portion is actually cracked and cracked some more when plugged in, Im thinking this is for the bin now huh?
Ok, finally have time to get to this, I measured for smc bc acock and I had it, I followed the line all the way to Q5310 and when measuring this, U6901 fried with hole in the middle and all, I replaced twice and NO smc bc acok any longer... I am fixing on getting another power supply and I N J E...
I will figure out the deal with my power supply then inject up to 3V and go from there. The buzzing is stronger on the U1800 area but not sure if its coming from there..... i will keep trying, thanx for your help so far!
Ok, I was able to connect my power supply but unable to inject more than 1.4V, regardless of amperage. My power supply is regulated and I am unsure if this has anything to do but it would not go over 1.4V, I will figure this one out later. When I had that voltage, I did feel L7630 get hotter...
holy shit! this is starting to make more sense now, reading you and looking at the schematic.... yes, I have a power supply here, need to find wires..... ok, I have seen videos of Louis R. about this, will follow and test for hot areas..... Thanx so much man! I will post my findings! =)
According to me ( :/ ) I have tested ALL RAILS but again, I am sure I missed several important areas, I am getting better though, thank you for the tip. I have removed L7030 and measurement on diode mode for pin 1 is .430v , pin 2 is still 0v
I have replaced u7000 already, maybe like 3 times (of course, from donor boards) but in the end, the same result, bright green light then dims to a very low one. Machine does not recognize the battery so, dead on battery as well.
Diode mode on reading on L7030 is pin 1 and 2 are zero V, pin 3...
ok, left board to cool off completely and my resistor now measures 228 ohms, what could have messed it up? I am aware of the lots of components on the line but, which one would have the ability to mess up the resistor like that.... it was fine for about one minute after board being plugged in...
ok, replaced and resistor was measuring 20.5 ohms, plugged in and still no bright green light, only dimmed, started measuring pins 2, 3 and 13 of U7000 again and measures came up as per boardview, after a moment, measured resistor and it fluctuates between OL and 0 ohms now and measurements back...