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820-2879 works extremely slow, fan is going high

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arash

Member
ASD shows the following problems:
Temperture (Ts0P) - unable to read sensor
SMC: SMC PID Sensor check - The SMC's PID Sensor check has been tripped
Thanks for the help guys
 
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arash

Member
Louis, thanks for your reply.
Replaced the trackpad with the trackpad cable, the same problems above now apear randomly - after a few minutes, they come and go.
ASD shows only the "SMC: SMC PID Sensor check - The SMC's PID Sensor check has been tripped" error. Hope it's not the SMC chip.
In PBUS Voltage Sense Enable & Filter circuit ---- C5385 has 1.6V when in battery use, with charger - 2.0V.
PPBUS_G3H is 9V in battery use, with charger - 11.5V
 
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dukefawks

Administrator
Maybe trackpad connector was damaged, inspect and replace. I assume you changed the complete trackpad+cable as one unit.
 
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arash

Member
Yes , I've tried with various trackpads / trackpad cables, it seems this is not the cause of the problem. Any other directions?
 
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dukefawks

Administrator
Diode mode on pin 17 and 19 of trackpad connector? Also disconnect Airport cable as this shares the data bus with the trackpad sensor.
 
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arash

Member
Thank you. Diode mode on pin 17 and 19 of trackpad connector = 0.597V when Airport cable is disconnected. Also the Mac works perfectly fine like that. R5270 = 0.998 Kohm, R5271 = 0.952 Kohm. R5271 allows 5% deviation - right on the border. Could that be it or should I look elsewhere?
 
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dukefawks

Administrator
So with airport disconnected it is ok? Then it is probably the cable or the connector, try with other LCD assembly
 
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