XPS 15 9570 will not charge but battery works

[madjid911]

Re: XPS 15 9570 will not charge but battery works

Connect the laptop battery pack -> attach the power adapter -> turn on the unit -> does the BIOS report the power adapter is connected ?

The power adapter must have the PS_ID (single wire) communication working to detect the power of the adapter.

See attached. Measure the voltage to ground of the power adapter pins.

ADP100 :
PIN 1-2-3 19V5
PIN 4 0V (PR102 - PD100 - PL104 0V and No short)
PIN 5-6-7 0V

pu200:
PIN8 : 3V29
PIN1 0V153
PIN2 1V47
PIN3 0V

The bios indicates at startup a low battery, by connecting the charger the message does not disappear

[mon2]

Re: XPS 15 9570 will not charge but battery works

If there is no short, pin # 4 of the power adapter should not be 0V.

Confirm that the connector pin is ok.

Remove the power adapter and measure the voltage of the PS_ID pin to the ground (outside metal ring) of the floating connector while the adapter is not connected to the logic board.

If the power adapter is working, the PS_ID will be a voltage higher than 0v.

[madjid911]

Re: XPS 15 9570 will not charge but battery works

If there is no short, pin # 4 of the power adapter should not be 0V.

Confirm that the connector pin is ok.

Remove the power adapter and measure the voltage of the PS_ID pin to the ground (outside metal ring) of the floating connector while the adapter is not connected to the logic board.

If the power adapter is working, the PS_ID will be a voltage higher than 0v.

You are really very strong, indeed the connector had a problem, a cable was unsoldered, I resoldered the cable, I now have 4V23 on pin 4, but the motherboard still does not start

[mon2]

Re: XPS 15 9570 will not charge but battery works

Good.

See attached.

[madjid911]

Re: XPS 15 9570 will not charge but battery works

good.

See attached.

pl104 pin2 5v11 falling
psid-2 0v
ps_id 0v

[mon2]

Re: XPS 15 9570 will not charge but battery works

Is the main battery pack connected ?

[madjid911]

Re: XPS 15 9570 will not charge but battery works

Is the main battery pack connected ?

With main battery it's the same but i think the battery is dead, if I want to turn it on I have to put the main battery and the external 11V4 power supply to start

pl104 pin2 4V35
psid-2 0v
ps_id 0v085

[mon2]

Re: XPS 15 9570 will not charge but battery works

What is the voltage to ground of +RTCVCC_R ?

Remove all power, meter in resistance mode.

What is the resistance to ground of:

PBAT_CHARGER_SMBCLK
PBAT_CHARGER_SMBDAT

[madjid911]

Re: XPS 15 9570 will not charge but battery works

what is the voltage to ground of +rtcvcc_r ?

Remove all power, meter in resistance mode.

What is the resistance to ground of:

pbat_charger_smbclk
pbat_charger_smbdat

rtcvcc_r 2v94

pbat_charger_smbclk 29kohms
pbat_charger_smbdat 29kohms

[mon2]

Re: XPS 15 9570 will not charge but battery works

See attached.

Something is wrong here to have 0v on pin #3 of PU200A.

Remove all power and inspect that the resistors @ PR211 and PR219 are present and of the correct values. Suspecting that PR211 is missing or defective.

With the resistors in place and no broken traces, pin #3 of the PU200A should be ~1v8 (ie. not 0 volts as you are reading at this time).

[madjid911]

Re: XPS 15 9570 will not charge but battery works

See attached.

Something is wrong here to have 0v on pin #3 of PU200A.

Remove all power and inspect that the resistors @ PR211 and PR219 are present and of the correct values. Suspecting that PR211 is missing or defective.

With the resistors in place and no broken traces, pin #3 of the PU200A should be ~1v8 (ie. not 0 volts as you are reading at this time).

PR219 is good 23,67KOHMS
PR211 present, pin1 19V5 pin2 0V resistance OL, She is dead, i'm trying to find a 240Kohms resistor on macbook i have a lot of donor motherboard but i can't find 240K :s

[mon2]

Re: XPS 15 9570 will not charge but battery works

The resistor value is not critical - do you have 200k or close to ?

In the end, the divided voltage needs to be UNDER the Vcc of the comparator @ PU200A voltage of 3 volts.

We can apply into the online calculator to see the actual value you can expect.

[mon2]

Re: XPS 15 9570 will not charge but battery works

See attached. Borrow the 200k from another part of the board but replace that 200k with any value you can find from 10k - 200k. It will still work fine.

Apply the 200k here to rebuild the broken circuit.

Have to leave in a bit to teach junior driving. Going to burn some rubber - fast and furious style after locating the nox. Will check back later on the progress.

[madjid911]

Re: XPS 15 9570 will not charge but battery works

The resistor value is not critical - do you have 200k or close to ?

In the end, the divided voltage needs to be UNDER the Vcc of the comparator @ PU200A voltage of 3 volts.

We can apply into the online calculator to see the actual value you can expect.

YES, I found 200Kohms, by removing PR211 i saw that the track was cut, I redid

PR211 PIN1 19V5 PIN2 2V1
PU200 PIN 3 2V1
R5842 200Kohms 0V5

but still no start, we are almost there

PQ200 PQ201 is ok now,
pq209 PIN1-2-3-4 19V23; pin5 0V22

[mon2]

Re: XPS 15 9570 will not charge but battery works

Mrs. Mon2 is burying with a grocery list so maybe MIA till tomorrow.

Check the voltage to ground of each grey coil now that the main power rail is back.

What is ACOK on the charger IC now ? Is that back to a logic '1' = ~3v ?

BBL

[madjid911]

Re: XPS 15 9570 will not charge but battery works

Mrs. Mon2 is burying with a grocery list so maybe MIA till tomorrow.

Check the voltage to ground of each grey coil now that the main power rail is back.

What is ACOK on the charger IC now ? Is that back to a logic '1' = ~3v ?

BBL

ACOK OV
+SDC_IN 19V22

should PU1900 be replaced?

[mon2]

Re: XPS 15 9570 will not charge but battery works

Back - still alive.

See attached. Confirm the key voltages of PU1900 to be sure to know if it is being powered.

If pin #17 of PU1900 is close to the +SDC_IN voltage then ACOK should be a logic high (not 0 volts).

ACOK is an open drain pin and the voltage of ACOK is defined by the pull-up resistor and pull-up voltage @ pin #18 of PU1900.

Confirm that there is a positive voltage on pin #18 of PU1900.

Confirm that PR1911 is ~100k ohms (no power during resistance checks).

While checking voltages - check the voltages on PQ1906 with the adapter connected. Perhaps it is ON and pulling ACOK to the 0 volts.

Aside from the above conditions, perhaps PU1900 is defective and needs to be replaced. From the original posting, a 35 volt adapter could have killed many parts on the board.

[mon2]

Re: XPS 15 9570 will not charge but battery works

resoldered the cable, I now have 4V23 on pin 4, but the motherboard still does not start

The PS_ID voltage is too high. Something is wrong with this power adapter.

Can you remove it and confirm the center pin voltage to ground while the adapter is disconnected from the logic board?

If still this high value, test with a different Dell adapter. This high voltage is dangerous and can kill the mec5105 since the mec5105 ec controller is operating at 3V. So the gpio pin voltage (PS_ID) must remain at or below this power rail used by the mec5105.

You can remove the series inductor / ferrite bead in series with the PS_ID signal trace. Once you are 100% sure the PS_ID voltage is under 3v3 then place back the ferrite bead.

The mosfet between the battery connector and the mec5105 acts like a crowbar to halt over voltage spikes to the mec5105. At this time it unknown if the mec5105 is ok or not.

The above is from the comments made by others in the 'unknown adapter' thread.

[madjid911]

Re: XPS 15 9570 will not charge but battery works

The PS_ID voltage is too high. Something is wrong with this power adapter.

Can you remove it and confirm the center pin voltage to ground while the adapter is disconnected from the logic board?

If still this high value, test with a different Dell adapter. This high voltage is dangerous and can kill the mec5105 since the mec5105 ec controller is operating at 3V. So the gpio pin voltage (PS_ID) must remain at or below this power rail used by the mec5105.

You can remove the series inductor / ferrite bead in series with the PS_ID signal trace. Once you are 100% sure the PS_ID voltage is under 3v3 then place back the ferrite bead.

The mosfet between the battery connector and the mec5105 acts like a crowbar to halt over voltage spikes to the mec5105. At this time it unknown if the mec5105 is ok or not.

The above is from the comments made by others in the 'unknown adapter' thread.

With the original charger ps_ID pin : 0V (0V when plugged in), with the compatible charger : 10V32 (4V24 when plugged in)

PU200 =
PIN 16 ADP :19V22
PIN 17 DCIN_ISL88738 19V05
pin18 VDD_ISL88738 5V11

PR1911 93,4kohms PIN1 0V; PIN2 5V11
PQ1906 PIN1 0V; PIN2 0V

I will try to find another original charger for dell

I think I will order PU200 to save time

[mon2]

Re: XPS 15 9570 will not charge but battery works

Yes, do not trust the fake charger.

Remove pq100 mosfet.

Short the PR100 pads to bypass the pq100 mosfet.

Using only the original power adapter, measure the ps_id pin voltage to ground again. This is assuming the voltage output of the real charger is ~19v.

The single wire identification device from Dallas Semiconductor is a parasitic design. It leans on the pull-up resistor on the mec5105 side to power itself.