820-3208 no PP5V_S3

arnonabuurs

New member
Hi I have a 820-3208 that came without any light on charger. After replacing R6920 and R6905 which measured wrong value, i have green and orange light back. PP5V_S3 is missing and I have measure following values:

PPBUS_G3H = 8.4
PP3V42_G3H = 3.41
PP5V_S5 = 5.02
PP5V_S3 = 0
PP3V3_S5 = 3.31

U7201
Pin 12 = 3.41
Pin 13 = 1.99
Pin 21 = 3.41
Pin 22 = 3.32
Pin 23 = 8.40
Pin 29 = 5.02

Resistance to ground L7260 = 0.231 both sidesResistance to ground L7220 = 0.437 both sides

Suggestions?
 

2informaticos

Administrator
Staff member
Check the basic signals for Power On Sequence...
SMC_ADAPTER_EN, PM_BATLOW_L, PM_SLP_SUS_L, 32KHz and PCH's RTC signals, S5_PWRGD, etc.
 

arnonabuurs

New member
Here some messures, SMC Adapter should be what voltage?

SMC_ADAPTER_EN at R5085 = 0
PM_BATLOW_L = 0 (no bat connected though)
PM_SLP_SUS_L = 3.31
S5_PWRGD Pin 8 U7941 = 3.40
 

arnonabuurs

New member
Thanks for the tips, use original. Tomorrow will check more as its late here. Didnt check RTC signals yet update tomorrow how thats going and thanks for the help so far bro!
 
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