Search results

Thanks for your help guys. it was the screen after all. Oh well i guess i better ring the customer and tell him the bad news.

My apologies i measured U7701 with the machine off. the second measurement was with machine on. thanks am getting a screen now. will update in the next hour. both pins 5 and 18 are getting 5v.

What fuse?. i said i had 12v on both sides. the fuse F7700 is fine unless you are referring to another one. ill try another screen.

Im getting 5v on both those resistors R7743/4 both 2.5Ohms and both are 0.374 in diode mode

u7701 Not turning on?

U7701 voltages P5 OV P11 11.93V P17 0V P18 0V

R7708/09 have cont. R7709 is 16K it should be 150K is this the feedback? F7700 is fine J8300 P1 with lcd on is 0.033 Diode mode J8300 P1 w/o lcd is 1.149 Diode mode Q7706 P1 -0.060 P2 -0.060 P3 12V P4 12,3V P5 0.060 P6 0.060 Hope this helps

there is 0v on backlight output. yes i can see an image but not backlight

Gday guys I'm using schematics for 820-3332 so hope layout is similar. unit has corrosion on c8513 PP1V5R1V35_S0GPU would this cause no backlight? because I wouldn't think so unless this rail must be complete before backlight shows up. or is it as simple as replace backlight driver? I'm getting...

Does anyone use usb c on Lab PSU? if so do you just connect +V and GND? i accidentally sold my charger but i have some type c cables

+V & GND is there anything wrong or missing? i have no idea if i should try this. any help would be gratefully appreciated.

can somebody tell me if they have connected usb c to lab supply and if so how did you do it. are there any issues. what is the pinout please?

i connect all of my different power cables to a lab supply to save the amount of shit on my bench. Magsafe, magsafe2, hp, toshiba,asus and so on.

U3740 P1 3.46v P2 1v P3 3.3v P4 3.45v P5 0v P6 3.254v P7 0.001v P8 0v

Ive tried to factory reset it but it hangs and does not go any further than connect to wifi and apple logo loading. after double checking some rails it appeared that i was not getting pp3v42_g3h it was reading 2.19v and flucuating. u7090 voltages were screwed so i replaced it and now pp3v42 is...

820-00165 no ssd detected. wifi works, it chimes, usb mouse powers up, fan does not cycle. im getting voltage to the ssd coil. main rails appear to be ok. History, Liquid damaged but was ultrasonicly cleaned by previous tech. C1053 Pin2 GND was corroded so i ran jumper to C1043 Pin2 GND...

it appears that pubic hairs from cockroaches can cause a 820-3437 to run like shit. this job is done thanks.

Mate this machine almost owned me. are you saying SMC_PBUS_VSENSE 0.166v is correct? i already checked R5503/04 and C5504 last night and they were correct. im sorry to be a fucktard but i put the IO flex under the scope and there was a cockroach pube inside it. i swapped the IO board out as...

ive been using a lab PSU for many years now. i always set it to 18.5v Q5500 P1 GND@0v P2 3.43v P3 8.53v P4 8.54v P5 Fluccuates between 3.42 & 3.5v P6 0v Thank You.

PPBUS_G3H 8.56v SMC_PBUS_VSENSE 0.166v Q5500 looks clean i have many IO boards so will swap out J9500 is clean, all pins are in tact and solid.