820-3023-A No Power not charge

Djsp

Member
But without the PCH I will never get the 5V S3? Can I interrupt the 3v3s that go to the PCH get the 5V somehow and then replace the PCH? Otherwise I give up
 

2informaticos

Administrator
Staff member
5V_S3 is controlled by PCH, via PM_SLP_S4_L; as any other S3 voltage.
You can force 5V_S3 power supply, but what do you expect?
PCH is dead...
 

2informaticos

Administrator
Staff member
If you still have short on 5V_S3 power rail, should be better to find it first.
Also check for short on other power rails.
 

Djsp

Member
I eliminated the short by replacing C7252 I checked after L7220 and the low insulation disappeared but still nothing PP5V_S3 probably because of the PCH if I understood correctly
 

2informaticos

Administrator
Staff member
Forcing its enable signal, instead of using PM_SLP_S4_L from PCH.
Remove R7913 and check L7220 voltage.
If no volt, run a wire from R7251 to R7252 abd test again.
 

Djsp

Member
Removing R7913 The PCH is no longer hot, it also disappeared 3v3_S5 then I joined R7151 and R7252 but on L7220 always 0V
 

2informaticos

Administrator
Staff member
3V3_S5 power rail is enabled through R7941.
Removing R7913 forces 5V_S3 and probably U7201 detects a fault on this rail and disables both outputs.

All this doesn't have much sense if you don't want to change PCH...
 

Djsp

Member
I found one that equals 820-3023 A but has a low insulation on L7330, as you advise me to proceed
 
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