Questions on 820-3115-B not powering on

jgraffis

New member
I have this 820-3115-B this machine did have water damage around the isl6259. i get no green light on the charger( even though i have 3.42v on the onewire) but no smc_bc_acok coming from the isl6259 which is where its created i believe... so i did some more checking around noticed that i get nothing on the charger Agate. i get 6.87v on one side of r7086 (the resistance on r7086 is .332 kh) and nothing on the other side.

any idea on that?
 

aprendiz

Moderator
I guess ISL is bad but check this....

Voltaje on pin 2 from ISL?? Should be about 16V
Voltage on pin 3 from ISL?? Should be about 4V
Resistance between pins 27/28 from ISL?? Should be about 20 ohm
Resistance between pins 17/18 from ISL?? Should be about 2.6 ohm
Voltage on F7040?? Should be 12.6V
 

jgraffis

New member
i don't think its the ISL, I've changed it twice.
pin2 is 16.31v
pin3 is 3.98v
resistance between pins 27/28 20.3ohm
resistance between mins 17/18 2.63ohms
voltage on F7040 12.24v
 

dukefawks

Administrator
396 Ohms is way to low. Could be the ISL6259 or SMC usually. Start with pulling the 6259 and measuring again. Check for corrosion around SMC.
 
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