(347) 552-2258 [email protected]

820-00165 - PPVRTC_G3H 2.8v

Palhano

Palhano

Member
The board is perfect, without oxidation, but very crazy. I have different measurements.

She already pulled 0.260a, turned the cooler, but it didn't turn on. most of the time it pulls 0.020a and without a cooler.

Measurements change frequently. When I had 3.3v on PPVRTC_G3H, PP3v3_SUS was 0.

At other times, I have 2.8v on PPVRTC_G3H, PP3v3_SUS and PP3v3_S5.

RTC_RESET_L - 3.26V
PCH_INTRUDER_L - 3v or 2.8v(it was 1.5v, I replaced it with a 100k resistor)
PCH_INTVRMEN - 2.5v
PCH_DSWVRMEN - 2.4v
PCH_SRTCRST_L - 3.26V

PPBUS_G3H - 8.6v
PP3V42_G3H - 3.4v
PP5V_S5 - 5v

PM_BATLOW_L - 0
PLT_RESET_L - 0

I'm thinking it's PCH!

Any tips?
 
2informaticos

2informaticos

Administrator
Staff member
RTC signals are good enough.
But you have missing PM_BATLOW_L; that impede PCH to continue power on sequence.
Are you using Magsafe 2 charger for sure?

Just in case, try SMC bypass mode.
 
Palhano

Palhano

Member
Today PPVRTC_G3H is fluctuating between 2.8 and 3.3v.

Yes, original MagSafe 2 85w!

nothing happens with SMC bypass.
 
2informaticos

2informaticos

Administrator
Staff member
Is the battery charging?
Check if starts with both charger and battery connected.

Post PM_DSW_PWRGD and SMC_ADAPTER_EN voltage.
 
Palhano

Palhano

Member
After reballing at SMC.

PM_DSW_PWRGD - 3.4v
SMC_ADAPTER_EN - 3.3v
PM_BATLOW_L - 2.8v (didn't have it before)
PLT_RESET_L follows 0v
 
Palhano

Palhano

Member
Strange, when the board doesn't turn on for a while (from yesterday to today), it turns on. It pulled 0.600 from the source, dropped to 0.400, turned on the screen and showed the apple... Then it turned off. She returned to the problem, pulling 0.020 in the source.
 
Palhano

Palhano

Member
Did not work. I washed the logic in the tub, but the problem continued, probably a bad PCH.

Thank you for your help!
 
You must log in or register to reply here.
Top