820-3115-B QUARTER FAN SPIN

2click

Member
Hi on this board I have quarter fan spin, checked already
R7021/22 - right values at 10 ohm
R7051 - 2.5 ohms
r7052 - 0.2 ohms

PPBUS_G3H is 12.63v but goes low to 12.0v and when it goes up again, the fan tries to start... any ideas?
 

2click

Member
I tried SMC bypass, no luck, still getting quarter spin, no orange light when the battery is connected... I reballed the SMC, nothing... doing the same... what else to check? Thank you!
 

2informaticos

Administrator
Staff member
Did you try original 60/85W charger?
What about lab PSU?

You didn't reply to the questions from a previous post...
 

2click

Member
Removed F7040 and PPBUS_G3H was 12.34v and going slowly up. It took around 5 minutes to get to 12.56v the strange this is that it is still going up slowly... it got to 12.61v and going slowly up... I disconnected the magsafe...
 

2informaticos

Administrator
Staff member
So you have a problem on the charger side.
Keep F7040 out, untill get stable voltage at C7040.

Post exact ohm resistance between pins 17/18 and 27/28.
 
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