Re: La-c881p
Voltages of PQ303 D - G - S when Only Adapter and Only Battery is present?
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Re: La-c881p
Just added the Schematics in the Schematics section. I Only was a few Seconds to slow...Leave a comment:
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Re: La-c881p
Do you have the schematics for this logic board? Please post them if you do.
Otherwise, what is the battery charger IC on the board?Leave a comment:
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Re: La-c881p
PQ303 and PQ304 are not internally shorted, the gate of PQ303 is 3.6V and of pq304 is 0.36V
in the PR313 with battery the voltage is 7.73V
PIN28 of PU300 with only adapter is 19.6 , with only battery is 7.15v and both 19.6v but it goes out immediately with both. only battery WORKLeave a comment:
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Re: La-c881p
This is NVDC Design, and tbh i'm Not so experienced there in Detail, and i wouldn't Try to Power on the Board before replacing PD300, so yes could be.
Also checked PQ303 and PQ304 for internal Short Circuit? Gate voltages of both Mosfets? PR313 Voltage with Only Battery present?
Edit: i believe without this diode PU300 will Not receive Power at Pin 28 in battery Mode. Confirm pls. And Check Pin28 with Only Adapter present too.Last edited by Sephir0th; 05-24-2021, 04:20 AM.Leave a comment:
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Re: La-c881p
With the battery it works.
With the power supply does not turn on and does not recharge, can this be due to the lack of pd302?
and in your opinion pr313 is low because pd302 is missing?
I found CH501H-40PT I can change it with SDMK0340LLast edited by riki_22; 05-24-2021, 04:07 AM.Leave a comment:
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Re: La-c881p
Measurements of PU300 and PR300 are fine. PR313 too Low (from charger).
It is still working from Battery?
Regarding the replacement, i can't Take Over the job to search for it for you. Compare with datasheets or Just Order a new one. I'm Not 100% Sure about the function of PD300 in the Circuit but could be important and ofc missing could prevent the Board from booting with Adapter.Leave a comment:
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Re: La-c881p
I don't have a double diode to put on the PD300, but if I don't insert the battery nothing really should happen. I still made the measurements PR313 3.2V
PR300 19.6V
PU300 P5 3.2V and P6 2.8V
can you advise me where to get a pd300 i have many donor motherboardsLeave a comment:
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Re: La-c881p
This is of course an issue around the charging controller.
But you replaced PD300 with the correct part, right? Confirm this first!
Then continue with Voltage measurements at PR300 and PR313 with only Adapter present. Sahre the values. Also check PU300, Pin5 and Pin6 voltage?Leave a comment:
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La-c881p
Hello everybody,
problem on xps 13 9350 with battery turns on but does not recharge and only with power supply does not turn on.
i found pd300 burnt.
because I found the broken connector with the pins that made contact. Removed PD300 E
fixed the connector
but i can't solve
Please help me
P.S. for me it is a power supply control circuit problemLast edited by riki_22; 05-21-2021, 10:43 AM.
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Vizio e601i-A3 - Has Sound and Display, But No Backlight - Bad Power Supply Board or Bad LED Bulbs ?I was given this TV from my great uncle. He said it just wouldn't turn on one day out of nowhere, replaced the TV, and gave it to me to possibly fix and use for myself.
Upon bringing it home and plugging it up, it showed a standby light.
I powered it on and without a flashlight, the display showed the "V" but the lighting is very dim, but visible.
The screen seems to blackout and stay black, but with a flashlight I can see the display.
With my Playstation 4 connected via HDMI, and running a game I can hear sound.
Assuming... -
I have wanting to do this project for quite sometime now and I finally found a switching power supply that will work on this desoldering gun station ZD-915 that the original switching power supply took a shit and just was not worth trying to fix it because this switching power is not quite big enough to handle the heater element and the vacuum pump
One note when I tested the switching power supply and the voltage control board I noticed that this desoldering gun heat up much faster than the original switching power supply which I was really surprised by to the point that I might buy... -
I see the positive and negative wires on the connector, but will it even allow a charge without the other connectors doing whatever communication it is that they do?
I'm well-versed in battery charging, just not laptop batteries. (I'm a lithium battery reseller)
Laptop became unresponsive while in storage, battery was in great health the last time I cut it off, but now it's reading zero volts at the connector. -
I have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
I once tried to get a ZD-915 desoldering station to work on a 18 volt battery power supply but unfortunately things did not go well but I did find a work around but I might try this idea again but going at a little differently more about this another time... -
This specification for the DELL XPS 9350 Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 9350 boardview and 9350 schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users directly on the relevant badcaps forum. Please note that we offer no warranties that any specification, datasheet, or download for DELL XPS 9350 Notebook...09-06-2024, 07:11 AM
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