820-00165 No ALL_SYS_PWRGD

[2informaticos]

No reason to check ALL_SYS_PWRGD before S5-S3 sleep states are released.
This signal is created from PM_SLP_S3_BUF_L via R8167.

Check voltages at L7520/60; any pulse at least?
Do you get magsafe light at least?

 

[Jay]

L7520 is 0V on both sides, no pulses I can tell of (no oscilloscope available either).
Magsafe light works.

 

[smiba]

Voltage of P3V3S5_EN_R, SMC_PM_G2_EN, P5VP3V3_VREG3, PP5V_S5?

I'm suspecting a dead U7501

 

[Jay]

I messed up in my original post, I did have S5:
PP5V_S5 - 5V
PP3V3_S5 - 3.3V
Edited original post to correct that typo that should say "S4"

As for the voltages you asked for:
P3V3S5_EN_R - 3.4V
SMC_PM_G2_EN - 1.04V
P5VP3V3_VREG3 - 3.3V
and of course PP5V_S5 - 5V

S4 and up I have 0V

 

[smiba]

SMC_PM_G2_EN should be 3v
​​​​​​its possible that when you first probed the S5 lines were not working because of this

Resistance to ground in Ohms on this line? Any crap around the SMC?

 

[Jay]

82.5 kOhm (if I measured that correctly. same as diode mode without the meter on diode mode?)

Was going to give the board another visual inspection so searched BV for all points SMC_PM_G2_EN is at.... they now all measure 3.4V ...
Area around SMC is clean.

 

[smiba]

82.5kOhm is alright, keep an eye on this voltage though as its one of the first signals we need for the system to do anything.

Voltage of S5_PWRGD, PM_DSW_PWRGD, PM_SLP_S4_L, PP3V3_SUS?