Dell E5430 doesn't detect charger ID

[andresi]

Re: Dell E5430 doesn't detect charger ID

Post the voltage readings of PQ3.

pq3

pin 1 = 5.1v
pin 2 = 0.4v
pin 3 = 0v. (short to ground)

[mon2]

Re: Dell E5430 doesn't detect charger ID

PQ3 needs to be ON to allow for the adapter ID to be passed to the logic board.

With the voltage measured on pin #2 of PQ3, it is OFF.

As a test, carefully, ground pin #1 of PQ3 with a piece of wire to ground.

Does the adapter get detected?

With no power, check the 2 resistors that connect to pin #2 of PQ3. Are their values ok? Are they damaged?

With power, what is the voltage on each of these 2 resistors? The voltage needs to be high enough to turn ON PQ3 when the adapter is plugged in.

When PQ3 is on, then pin #1 should be LOW = ~0 volts.

[andresi]

Re: Dell E5430 doesn't detect charger ID

PQ3 needs to be ON to allow for the adapter ID to be passed to the logic board.

With the voltage measured on pin #2 of PQ3, it is OFF.

As a test, carefully, ground pin #1 of PQ3 with a piece of wire to ground.

Does the adapter get detected?

With no power, check the 2 resistors that connect to pin #2 of PQ3. Are their values ok? Are they damaged?

With power, what is the voltage on each of these 2 resistors? The voltage needs to be high enough to turn ON PQ3 when the adapter is plugged in.

When PQ3 is on, then pin #1 should be LOW = ~0 volts.

yes i use original charge, and it working with other dell laptops.
the adapter is detected.

i test :

pr14 = 99.7kohm pin#1 3.3v, pin#2 0.422v

pr16 = 14.25kohm pin#1 0v, pin#2 0.422v

pr15 = 9.9kohm pin#1 5.128v, pin #2 5.121v

i check it with battery in. but still plug in not charging

i turn on warning adapter in bios i got this “Alert! The AC power adapter wattage and type cannot be determined. The battery may not charge. The system will adjust the performance to match the power available.

but i sure the charging and battery workly in other same e5430.

[mon2]

Re: Dell E5430 doesn't detect charger ID

Watch this video:

https://youtu.be/OkVFrKVHwfA

[mon2]

Re: Dell E5430 doesn't detect charger ID

My bad...PQ3 is a PROTECTION transistor.

If the voltage is very high on the PS_ID line from the external adapter, then PQ3 will turn ON to cause the LOW voltage @ PQ2, pin # 2 = to remove this surge event from reaching the logic board.

Noting the above, perhaps PQ2 (N-channel) is defective.

With ~5 volts on the GATE of PQ2, this mosfet (PQ2) is ALWAYS ON.

See attached. Locate PR11 and apply a solder blob to see if this resolves the issue. If not, then PU1 switch may be defective and needs to be replaced.

Start with the quick test of bypassing PQ2 with a solder blob @ PR11.

If this test works - then PQ2 needs to be replaced.

[andresi]

Re: Dell E5430 doesn't detect charger ID

My bad...PQ3 is a PROTECTION transistor.

If the voltage is very high on the PS_ID line from the external adapter, then PQ3 will turn ON to cause the LOW voltage @ PQ2, pin # 2 = to remove this surge event from reaching the logic board.

Noting the above, perhaps PQ2 (N-channel) is defective.

With ~5 volts on the GATE of PQ2, this mosfet (PQ2) is ALWAYS ON.

See attached. Locate PR11 and apply a solder blob to see if this resolves the issue. If not, then PU1 switch may be defective and needs to be replaced.

Start with the quick test of bypassing PQ2 with a solder blob @ PR11.

If this test works - then PQ2 needs to be replaced.

i already jumper pr11 but still no working, maybe the problem is ic smsc, i will find the same type to replace that ic. thank you sir, i got some many knowledge here.

[mon2]

Re: Dell E5430 doesn't detect charger ID

Does your logic board complain about the adapter?

Is the logic board running slower with the proper adapter? This means the power adapter is not being properly detected.

The original poster of this thread may have had a different issue than your case. The OP could not detect the power adapter. You case is that the battery is not charging.

Be sure the power adapter is the proper adapter for this logic board and the original from Dell. Otherwise, the PS_ID cannot be read (single wire communication device inside the adapter).