Dell E5520 adapter detect

[ahkh_72]

hi
there is a dell e5520 MB:10ELT15F001-A KRUG 15, that can not detect adapter wattage.
in bios show unkown AC adapter.

I checked DC jack to MB conection was ok.

how can i bypass this error?
thnks

[SMDFlea]

Re: Dell E5520 adapter detect

hi
there is a dell e5520 MB:10ELT15F001-A KRUG 15, that can not detect adapter wattage.
in bios show unkown AC adapter.

I checked DC jack to MB conection was ok.

how can i bypass this error?
thnks

Are you using a 3rd party charger or a genuine dell one.Have you tried another charger

.

[ahkh_72]

Re: Dell E5520 adapter detect

Are you using a 3rd party charger or a genuine dell one.Have you tried another charger

.

yes i checked it with 3 genuine dell charger.
and i checked that charger on another dell laptop, was ok.

[SMDFlea]

Re: Dell E5520 adapter detect

yes i checked it with 3 genuine dell charger.
and i checked that charger on another dell laptop, was ok.

Check the PS_ID circuit.Test the voltage and resistance on PR224 both pins also DCIN_CBL_DET# -> R337

[ahkh_72]

Re: Dell E5520 adapter detect

Check the PS_ID circuit.Test the voltage and resistance on PR224 both pins also DCIN_CBL_DET# -> R337

pq20 <3.420v> PR224 <3.414v> pu3

resistance on pr224 6.2 kohm
voltage on DCIN_CBL_DET# =0v
resistance on DCIN_CBL_DET# =0.4 ohm

R337=3.3V AND other side 0v

[mon2]

Re: Dell E5520 adapter detect

resistance on pr224 6.2 kohm

This is a bad reading for this component. It should be ~100 ohms. Replace this part or you can test with a short across this component. Better to place a low resistance resistor if available. Any value like 33 ohms to 390 ohms is ok.

Then test again. Be sure that the resistance checks are without any power to the logic board and that you are checking the resistance with the meter probes across the part (not to ground).

PS: Love the mazafati dates from your area Need to pick some up tomorrow...

[ahkh_72]

Re: Dell E5520 adapter detect

This is a bad reading for this component. It should be ~100 ohms. Replace this part or you can test with a short across this component. Better to place a low resistance resistor if available. Any value like 33 ohms to 390 ohms is ok.

Then test again. Be sure that the resistance checks are without any power to the logic board and that you are checking the resistance with the meter probes across the part (not to ground).

PS: Love the mazafati dates from your area Need to pick some up tomorrow...

I apologize for my mistake.
Yes its about 99 ohm.

RE:Enjoy your meal (:

[ahkh_72]

Re: Dell E5520 adapter detect

This is a bad reading for this component. It should be ~100 ohms. Replace this part or you can test with a short across this component. Better to place a low resistance resistor if available. Any value like 33 ohms to 390 ohms is ok.

Then test again. Be sure that the resistance checks are without any power to the logic board and that you are checking the resistance with the meter probes across the part (not to ground).

PS: Love the mazafati dates from your area Need to pick some up tomorrow...

I short 2 pins of r224 with wire .
but still same result.

[mon2]

Re: Dell E5520 adapter detect

Ok - the series resistor is ok.

What is the voltage to ground of the PSID pin at the DCin connector? This is referenced as pin #6 on CN1.

Carefully also measure the voltage to ground of each pin of PU3. This is the load switch that allows for the communication to pass through to / from the single wire ID device inside the Dell original adapters and the EC on your logic board.

This signal path is required to be working so that the ID of the adapter can be read by the logic board.

[ahkh_72]

Re: Dell E5520 adapter detect

Ok - the series resistor is ok.

What is the voltage to ground of the PSID pin at the DCin connector? This is referenced as pin #6 on CN1.

Carefully also measure the voltage to ground of each pin of PU3. This is the load switch that allows for the communication to pass through to / from the single wire ID device inside the Dell original adapters and the EC on your logic board.

This signal path is required to be working so that the ID of the adapter can be read by the logic board.

PSID(DCin) pin is 4.3V.

pu3 pins:
1=0.6v
2=0v
3=3.4v
4=3.4v
5=5.1v
6=0v

[mon2]

Re: Dell E5520 adapter detect

PSID(DCin) pin is 4.3V.

This is too high.

Carefully measure the voltage to ground of each pin of the mosfet @ PQ20.

Post the measurements.

[ahkh_72]

Re: Dell E5520 adapter detect

This is too high.

Carefully measure the voltage to ground of each pin of the mosfet @ PQ20.

Post the measurements.

PQ20:
pin1(S)=3.41v
pin2(G)=4.29v
pin3(D)=4.29v

[mon2]

Re: Dell E5520 adapter detect

PQ20 appears to be leaky as the GATE voltage is the same as the DRAIN voltage.

Flux and remove PQ20 mosfet. Then apply solder blob onto PR223 so that this solder blob will short the DRAIN & SOURCE pins.

Then measure the voltage to ground again of the PSID pin at the DCin connector.

It should be ~3v41 => same as the PSID voltage on the EC side of the circuit.

[ahkh_72]

Re: Dell E5520 adapter detect

PQ20 appears to be leaky as the GATE voltage is the same as the DRAIN voltage.

Flux and remove PQ20 mosfet. Then apply solder blob onto PR223 so that this solder blob will short the DRAIN & SOURCE pins.

Then measure the voltage to ground again of the PSID pin at the DCin connector.

It should be ~3v41 => same as the PSID voltage on the EC side of the circuit.

thank you very much

Now AC Adapter is =90W in bios.
But PSID voltage in DCin is 0.03v.

TNKS again for your time.

[mon2]

Re: Dell E5520 adapter detect

Well done! Just repeating some of the tricks posted by @mcplslg123 and others in the forum

PS: The same local store has THE best baklava we have had. One of these days, will try to learn how to make it ourselves.

[mcplslg123]

Re: Dell E5520 adapter detect

I still wonder why so many threads are started for dell PSID problems when every possible solution is already there in the forum. Members should first read atleast some threads with similar contents before starting a new thread. If the issue is resolved by reading any thread, they can sum up there experience in those threads. This help us to help many others who may have something more tricky problems. I dont mean any offence to anyone but just raising an issue which should be addressed for the benefit of badcaps family.