820-00165 not turning on

[iClub]

Hey buddy, I've got this mac that's been repaired, the U5110 has been replaced and components next to it. In the tests the safe is swaying in green and orange and the cooler does not rotate.


Voltage: PPbus_g3h 8.60V; PP3v42_g3h 3.41V; ALL_SYS_PWRGD_R 0V; oscillates (PP5v_s0 0 ~ 1.2V; SMC_PM_G2_EN 0V ~ 3.42).

 

[2informaticos]

Surely no pulse at all at ALL_SYS_PWRGD?
Which other big coils pulse, apart of L7520?

 

[iClub]

ALL_SYS_PWRGD0V;


L7130 PPVBAT_G3H_CHGR_REG / CHGR_PHASE 8,56 / 8,74 V
L7520 P5V_S4RS3_REG_L / PP5V_S4RS3 0V
L7560 P3V3_S5_REG_L / PP3V3_S5_REG_R 1.7 ~ 3.2V oscilando
L7430 PDDR_S3_REG_L / PPDDR_S3_REG_R 0,02V
L7630 P1V05S0_LL / PP1V05_S0_REG_R 0.02V
L7310 PPVCC_S0_CPU_PH1 / CPUVR_PHASE1 0v
L7320 PPVCC_S0_CPU_PH2 / CPUVR_PHASE2 0v

 

[iClub]

SMC_RESET_L 3.31V
U5110:
1- 3,42V
2- GND
3- 3,43V
4- 2.94V
5 - 3,27V
6- 3,41V
7 - 3,42V
8 - 2,95V.

When you trigger SMC_ONOFF_L the magsafe light turns green.

 

[2informaticos]

"When you trigger SMC_ONOFF_L the magsafe light turns green."
Looks like SMC reset.
Are you working with the board alone on the desk?
Disconnect trackpad and use R5115/16 pads instead...

 

[iClub]

''Are you working with the board alone on the desk? ''
only with the bench plate.

 

[2informaticos]

SMC_RESET_L is steady high, when you trigger SMC_ONOFF_L?

 

[iClub]

When you trigger SMC_ONOFF_L , the voltage SMC_RESET_L remains high.

 

[2informaticos]

Magsafe light still switch from orange to green then?

 

[2informaticos]

You must clean/replace each oxidized component.

3V3_S5 is now stable?
Post again voltages, after you've got Magsafe light steady.

 

[iClub]

PP3V3_S5 instable

You must clean/replace each oxidized component.

okay

 

[2informaticos]

Post U7501 basic voltages; pins 23, 12, 13, 22, 29, 21.

 

[2informaticos]

Did you eliminate all the corrosion?
Also replace affected components...

 

[iClub]

had oxidized components near the SMC, I'm going to do the SMC reball.

 

[2informaticos]

Always reball SMC, when you detect liquid sign around it.

 

[iClub]

resolved after running the SMC again, on the first attempt, I think there was a missing component sold, because it gave 8.18V in the PPBUS, I redid it again as sold and solved. Thank you friend !!!