820-3462 Missing PM_BATLOW_L, SMC_ADAPTER_EN, PM_SLP_SUS_L

Bouba148

New member
Hi Team,

I have a 82-3462 board that Fans pulsing in loop

PPVCORE_S0_CPU: 0V
PPVCORE_S0_AXG: 0V

PPBUS_G3H: 12.59V
PP3V42_G3H: 3.431V
PPVRTC_G3H: 3.336V
PP5V_S5: 5.035V
PP3V3_S5: 3.341V
PP5V_S4: 5.035V

PP3V3_S4: pulsing
PP5V_S3: pulsing
PP3V3_S3: pulsing

P5VS3_EN: pulsing
PM_SLP_S4: pulsing

SMC_BC_ACOK: 3.4V
SMC_PM_G2_EN: 3.428V
PM_BATLOW_L:0V
SMC_ADAPTER_EN: 0V
PM_SLP_SUS_L: 0V

SMC_ONOFF_L: 3.429V

Y5010: 12Mhz
SMC_CLK32K : 32Khz
3 25Mhz signal pulsing

SMC_ONOFF_L: 3.429V
 

2informaticos

Administrator
Staff member
"PM_BATLOW_L:0V
SMC_ADAPTER_EN: 0V
PM_SLP_SUS_L: 0V"
Are you sure?
Board should not even try to start...

Maybe getting some pulses there too?
 

Bouba148

New member
ola amigos,

I've re-mesured again, i had the same voltage for PM_BATLOW_L then suddenly it turned high.......maybe i'm too tired......sorry
here are the voltages......

PM_BATLOW_L: 3.336V
SMC_ADAPTER_EN: 3.397V
PM_SLP_SUS_L : 3.340V

ok so let me going through the others PCH Inputs page 18, or if you have any suggestion.....

thanks
 

Bouba148

New member
PM_PWRBTN_L: 3.422V
PM_RSMRST_L: 3.310V
PM_PCH_PWROK: pulsing
PM_PCH_SYS_PWROK: 0V
PM_SYSRST_L: pulsing
 

Bouba148

New member
at pin 7 of U7950: no pulse 0v
Pins 1 & 2 are pulsing

At U7400
PP5V_S0_CPUIMVP is pulsing

at Q7860
PP5V_S4_P5VS0FET: pulsing
PM_SLP_S3_R_L (P5VS0_EN): pulsing
 
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Bouba148

New member
PM_SLP_S5_L pulsing......................back to PCH again......any suggestion?
 
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Bouba148

New member
Around the PCH, I've found L3508 missing but this one only provides the 5V to the camera, and not sure that it is responsible of my issue, however I'll replace it tomorow as it's starting to be late here in France.
 

2informaticos

Administrator
Staff member
"at pin 7 of U7950: no pulse 0v
Pins 1 & 2 are pulsing"
If gets power on pin8, then pin7 should pulse too.

Check pin8 solder, change U7950 if needed.
 

Bouba148

New member
Ola 2Informaticos,
que tal?

I've repaced U7950 from a donor board, now pin 7 is pulsing too......a good thing done gracias, but still in the same "mode" ( quarter fan spin in loop)

when i plug the charger it rises to 2.3V then drops, then when the quarter fan start his cycle, it pulses from 0.085v to 0.150V
 

Bouba148

New member
already dumped, cleaned (ME, Pram and SSN area) with the medusa and restored it back without success but i can try another chip you're right ...
 

Bouba148

New member
Ola 2Informaticos,

Im using a DC power supply with original 85W cable because of the tip, as you know it contains a chip that is talking with the machine with the one wire protocol.

Regarding the chip , I've just replaced the bios chip from a donor board, of course I did all the dumping/cleaning tasks with the medusa 2 before soldering it.

And you know what: It's working fine .......muchas gracias, that board was there for months now......;):D

I'm so happy .

Again thanks a lot muchas gracias..
 
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