(347) 552-2258 [email protected]

MacBook Pro M1 - 820-02020 stuck on 5V 0.21A

R

ronaldo

Member
I need help on these please.
I got this Mac with no power, dead.
There was a bad corrosion on the one of the CD3217 (UF400)
All the pins from USBC0_CC2, USBC0_CC1 and UPC0_R_OSC was welded and a whole on the board.
I have rebuild the tracks and soldered a CD3217 from a M1 air.
I replaced U5200 with a good working one. Just in case.
It is now stuck on 5V.
LDO regulators that output ~3.3V and ~1.5V are present.
F5200 - PPBUS_AON - 12V
PP1V25_S2 - 1.22V
PP3V3_S2_UPC - 3.29V
PP1V8_S2 - 1.8V
USBC0_3V3LDO_EN - 1.8V
UPC0_SS - 0V
PPVBUS_USBC0 - 5.16V
 
R

ronaldo

Member
It gets different readings on another board on PPVDD_DISP_S1
The board I'm trying to fix is 0.083

Other the other boards is 0.144
 
R

ronaldo

Member
Hi.
I am still trying to get this LB fixed.
I bought another working LB with iCloud locked and replaced both CD32, U5700, U5200 (ISL9240 I) and the U8100 (TMLT46B0-JPE).
The behaviour still same.
PPDCIN_USBC_AON (5.15v)
PPVBUS_USBC0 / PPVBUS_USBC1 (5.15v)
PP3V3_S2SW_USB0 / PP3V3_S2SW_USB1 (3.30v)
PP3V3_UPC0_LDO / PP3V3_UPC1_LDO (3.30v)
PP1V5_UPC0_LDO_CORE / PP1V5_UPC1_LDO_CORE (1.58v)
PD_UPC0_MRESET / PD_UPC1_MRESET (0v with multimeter)
UPC_PMU_RESET_3V3 (0v with multimeter)
PPDCIN_USBC_AON 5V
PPBUS_AON 12v
PP3V3_AON 3.3v
PP5V_AON 5v
PP3V3_UPC*_LDO
I2C_SMC_UPC_SCL and I2C_SMC_UPC_SDA starts at 1.2v then dropes to 0.9v
Can you help me with that?
 
Last edited:
You must log in or register to reply here.
Top