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820-2915 1.7 v ppbus_g3h
- Thread starter Chuck60
- Start date
Do you get 3V42_G3H and green light on Magsafe?
Did you check diode mode to ground at PPBUS_G3H?
Any history available, liquid sign?
Post other U7000 voltages; pins 1, 9, 15, 19, 20, 27.
Did you check diode mode to ground at PPBUS_G3H?
Any history available, liquid sign?
Post other U7000 voltages; pins 1, 9, 15, 19, 20, 27.
"Pin 15=0-1.49v fluctuates "
Should stay under 0.5V...
You forgot pin 9.
Check again resistance between pins 17/18, directly on the chip.
Also try to start in SMC bypass mode.
Should stay under 0.5V...
You forgot pin 9.
Check again resistance between pins 17/18, directly on the chip.
Also try to start in SMC bypass mode.
Chuck60
Member
Pin 9=0v
I’m sorry
nothing with smc bypass model
I resoldered all the pins go u7000
and now I have a solid green light and 4v on ppbus_g3h.
I have smc_pm_g2_en at pin 1 3.42v of r7940 And pin 12 of u7201
R7012 is 736ohms It say 1k (chgr_cell) I have 3.42v at chgr_cell And 3.42v at pin 12 of u7000 so I checked for continuity between pins 12 and 6 of u7000 There’s continuity.
R7086 I have 6.8v on pin 1 but 0v at pin 2
(Chgr_agate_div) Going to u7000 “r7806” measures
Can u7000 be shorting chrg_acin to ground?
Still 0v on pin 1 of u7000
Oddly when I plug in charger the fan bumps a lil. Bit just like a 1/8” twice each time I plug it in to MagSafe
Lastly should I check for signal both pins 11 and 10 Smc data lines with oscilloscope ?
I’m sorry
nothing with smc bypass model
I resoldered all the pins go u7000
and now I have a solid green light and 4v on ppbus_g3h.
I have smc_pm_g2_en at pin 1 3.42v of r7940 And pin 12 of u7201
R7012 is 736ohms It say 1k (chgr_cell) I have 3.42v at chgr_cell And 3.42v at pin 12 of u7000 so I checked for continuity between pins 12 and 6 of u7000 There’s continuity.
R7086 I have 6.8v on pin 1 but 0v at pin 2
(Chgr_agate_div) Going to u7000 “r7806” measures
Can u7000 be shorting chrg_acin to ground?
Still 0v on pin 1 of u7000
Oddly when I plug in charger the fan bumps a lil. Bit just like a 1/8” twice each time I plug it in to MagSafe
Lastly should I check for signal both pins 11 and 10 Smc data lines with oscilloscope ?
Last edited:
Chuck60
Member
Ok I saw something with my oscilloscope so I plugged a battery and charger, the board chimed. Fans ran normal not on high so I’m guessing the smc is fine. Would you say now that the culprit is isl6259
These give me issues
out of 10- isl6259 Only 2 where good. eBay is getting progressively worse
These give me issues
out of 10- isl6259 Only 2 where good. eBay is getting progressively worse
The board works now, after changing ISL6259?
Pin 1/U7000 MUST stay at 0V.
Pin 1/U7000 MUST stay at 0V.