820-00430-A iMac A1418 imac2015

lincev

Member
hi friends, I have received this equipment and I have been able to observe that it had some corrosion in the area of the image that I attached, I have cleaned it well, I have not observed anything strange but only 2v reaches the power pad pins, I need your help. thanks a lot

Captura de pantalla 2024-05-13 a las 10.43.17.png
 

lincev

Member
oh sorry i'm talking about the pins of the power button connector on the power supply

Edit: when plug power cord I can't see any led green
 

2informaticos

Administrator
Staff member
"1 PP12V_S5=0v
2 PP12V_S5=0v
3 PP12V_S5=0v"
Any reason to check that on 3 pins tied together?
Use the logic and save time.

Now post U6970 voltages.
Just in case, check diode mode to ground at 12V_S5.
 

lincev

Member
U6970
1 PP12V_G3H= 12v
2 SMC_PM_G2_EN=0v
3 UNCONNECTED
4 GND
5 PP12V_G3H= 12v
6 PP12V_S5= 0v
7 FET_EN_P12V_S5= 0v
8 PM_EN_REG_P3V3_S5=0v
9 GND


12v_S5 mode to ground value 1866
 

lincev

Member
hi thanks

values:

U6900
1 P3V42G3H_FB= 0,75v
2 PP3V42_G3H_REG_R= 2,10v
3 P3V42G3H_BOOST=4,68v
4 P3V42G3H_SW=1,98v
5 GND
6 PP12V_G3H= 12v
7 UNCONNECTED
8 P3V42G3H_SHDN_L=3,58v
9 GND
 
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