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I have this board, no corrosion found, had a short on pp3v42, that is fixed now, but now ppbus_g3h is at 15.6v already changed Q7130 and U7100 no change...
just measured diode mode on pin 1 and 2 of f7140 (red probe ground, black on pins)
PIN 1- .138
PIN 2- .175
Checked big coils and there is one that has the same value that PIN 2 has: L7630, with red probe on ground .175, with black probe on ground .199
I don´t know what else to do to make PPBUS_G3H to come to life, please help!
EDIT: Got the PPBUS_G3H to work! it was pin 8 on Q7130 that wasn´t good. Now I have 8.60, but don´t want to put the fuse back yet. Is the L7630 value correct?
Changed Q7630, and still measuring .2ohms, checked L7630 to ground on ohm scale I get 230 ohms in diode mode red probe to ground I get .165 is that a short?
removed Q7630 and checked from L7630 to PIN 2 from F7140 im getting 3 Kohms and going up. Thanks for your patience, I know this is a delicate line and I don´t want to screw it up if it is not screwed yet...
So I put the fuse back, connected it to the PSU and nothing... Q7630 shorted again...
Removed Q7630 and there is no short to ground on L7630. that is a good thing isn´t it?