ok so i tested stuff again "in circuit"
some voltages do not match in av mode. strange , they all matched manual specs outside the tv
i am not really bothered by few floating pins on g913 and g914 conectors , because my setup does not use those pins
but i have 3 transistors that act wierdly
t916 instead of E 5,9V have 1,5V there and B should be 6,5V and shows only 2V
t917 instead of E 6,5V ther is 2V and B should be 7,24V and i have 2,7V
t921 instead of C 10V i have 0,1, but again pinon g914 is not used in m557 tv so i did not used this pin, same gows for pin 2 on g913
i probably need to dig deeper into differences between m557 and m558 av modules and how they are connected to the main board
also the transistor i drawn in , where schematic was smired should be t916 i think not t923, because there are now 923 now sorry for that
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ok i messed up a little bit when mixing m557 and m558 elements into my d505 model because i first made av module from m558 and then the rest od m557 input boards, but that shouldn't matter because dubbled parts were mostly responsible for rgb synchronisation.
so i backtracked a little bit and now i am closer to umm-2001/umi-2001 from m577 than anything else (only adition is the audio output from umm-2002)
video synchronisation on white stays the same, go dark and to the left. But only white, all other color signals are displayed correctly
i attach a whole schematic of the tv, most of the modules are the same as those in my tv.
http://www.deviantart.com/download/675032120/schemat_m557_by_kokodin-db5wa48.jpg?token=3b831b1811f3370cf0ba6104f5692971ee2ed5d6&ts=1492267783if the upper link does not work just download it from my deviant account
http://kokodin.deviantart.com/art/Schemat-M557-675032120edit***********************************
i was playing around with the scope, dc coupled and i discovered something. Signal is a little bit compressed on the top. if we belive my scope voltage peak to peak is correct, with a colorbar signal (around 2,5Vpp), and less when i input white signal (around2Vpp), Signal also begin half a volt higher than colorbar signal, so the synchronization pulses are at the black level of the other signal? Like it was more bias than colorbar signal. Synchronisation pulses are also shorter at the synchronisation midule. Anyway i have no idea how to resolve that, because i have 3 modules that don't play along. And i only partialy know how they work:]
i will try to simplyfy the schematic to cut out every module that isn't involved with this signal and then i might start to think how to fix it
because right now when i see this schematic i see too much at once to concentrate.
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pighededness for the win, or was it leg work?
Basically i went trough all revisions of this av board i could find and i tryed out every different bias configuration for t917. Resistors r928 and r929 were often switch for other values in diferent board revisions so it was the easiest thing to notice. In the end i reduced r928 from 18K to 8,2K and left r929 as it was and everything works. I also gain some color saturation in bright colors.
So now it works as it should.
Thanks you all for help i think you kicked me in the right direction even if i did not understand much about what you were talking about