Dell E5430 doesn't detect charger ID

[Andreasbest]

Hello!
I have a E5430 that doesn't recognize the adapter wattage and therefore cannot charge the battery.
Any advice welcomed
Thank you in advance!

[SMDFlea]

Re: Dell E5430 doesn't detect charger ID

Page 43. Come on man post some voltage measurements you`re not new to this,youve worked on dells before with this same problem

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

Indeed, still have no idea about circuits and how they work though.
What pins you want me to measure?

[SMDFlea]

Re: Dell E5430 doesn't detect charger ID

Pq2,pu1

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

With laptop ON and charger connected:
PU1 has 5v @ pin #5 (all other 0v)
PQ2 has 5v @ Gate (all other 0v)

[SMDFlea]

Re: Dell E5430 doesn't detect charger ID

Voltage and resistance at PL4

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

PL4 resistance to GND (both pins) 110KΩ
Voltage 0v
(bought boardview too, uploading meanwhile)

[SMDFlea]

Re: Dell E5430 doesn't detect charger ID

PL4 resistance to GND (both pins) 110KΩ
Voltage 0v
(bought boardview too, uploading meanwhile)

Theres no voltage on psid from the middle pin,the jack is probably broke

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

I tried with other jack (i got many assembled with cable, genuine Dell) but still no luck.
I also double checked all measurements and they are correct.

[SMDFlea]

Re: Dell E5430 doesn't detect charger ID

I made a mistake, can you check PR13 it should measure 33 ohms ,and PR12 2.2K

[reformatt]

Re: Dell E5430 doesn't detect charger ID

The PS_ID line should be pulled high by PR12 to +3.3V. One wire comms to the charger is initiated by the EC by pulling this line low momentarily. You should see a small burst of data from the charger on a CRO when the charger is first plugged in. If the line is zero volts, then the one wire chip in the charger is getting no power. Check whether +3.3V_ALW is absent or it's being pulled low by something (potentially the EC or the switch chip PU1.

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

I'm sorry, i was away from the bench for some days.
@SMDFlea the PR12 and PR13 are tiny SMD, you want me to desolder and measure them?
@reformatt thank you for the explanation but i don't understand exactly what you want me to do. I'm not very expert. Can you please explain?

[lapfix]

Re: Dell E5430 doesn't detect charger ID

What's the voltage at PR12 from 2 sides

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

0v and 3.3v

[lapfix]

Re: Dell E5430 doesn't detect charger ID

Pr12 resistance to GND from the side of 0V !
PQ2 voltages !

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

0v side to GND = 9Ω
PQ2 has 5v @ Gate

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

also
PR12= 2.3kΩ
PR13= 34Ω

[Vesko356]

Re: Dell E5430 doesn't detect charger ID

0v side to GND = 9Ω
PQ2 has 5v @ Gate

PSID line is shorted to ground, most probably PU1 is the reason. Replace it, or if you don't have a spare one, just short pin3 to pin4, but before that make sure the short to ground is gone.

[Andreasbest]

Re: Dell E5430 doesn't detect charger ID

I replaced the PU1 (from a used motherboard, not brand new part) the resistance on PR12 raised from 0Ω to 2.kΩ although still charger wattage is unidentified.
Another failed component?

[Vesko356]

Re: Dell E5430 doesn't detect charger ID

I replaced the PU1 (from a used motherboard, not brand new part) the resistance on PR12 raised from 0Ω to 2.kΩ although still charger wattage is unidentified.
Another failed component?

So far so good.
What is the voltage at pin 4? There is a possibility the replaced part is also faulty so short pin3 and pin4 and test this way.